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Vlad D, Full-Stack Python Software Engineer

Kyiv, Ukraine
Last Updated: 4 Jul 2023
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- Full-Stack (Python + Vue.js) Software Engineer with a background in digital marketing; - Core Python, Flask & Django Frameworks, reusable code - RESTful APIs - MVC, SOLID, DRY principles; - SQL, Django ORM, Elastic Search Platform - Upper-intermediate English; - Available ASAP

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Oleg P., Blockchain Developer

Last Updated: 13 Nov 2023

Strong software engineer with 5 years of experience in blockchain development; - Proficient in TypeScript, JavaScript, Web3, and various blockchain technologies such as Rust/Solana, and Polygon/Solidity; - Skilled in smart contract development, DAO implementation, and blockchain integration with web applications; - Experienced in building decentralized applications (dApps) and NFT marketplaces; - Knowledgeable in implementing online crypto payments and blockchain-based gaming systems; - Familiar with AWS, Firebase, and other cloud services for scalable and secure application development; - Achievements include implementing tokenized player trading, decentralized tournaments, and interactive NFT marketplaces; - Strong problem-solving and troubleshooting skills with a solid understanding of browser and web concepts.

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SOLID   2 yr.

Smart Contracts

Smart Contracts   5 yr.


React   2 yr.





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Vilalii Vasilenko, Software Engineer

Kyiv, Ukraine
Last Updated: 29 Nov 2023

Software Engineer with extensive experience in full-stack development, specializing in both front-end and back-end technologies. Noteworthy expertise with Umbraco CMS, including component development and Backoffice extension, supplemented by strong experience in .NET ecosystem (ASP.NET Core 3.1, .NET 5.0-6.0, EF Core, and .Net Framework). Proven track record in CRM and Asset Management systems, underpinned by knowledge in various programming languages and tools such as TypeScript, JavaScript, Angular, React, and Microsoft SQL Server. Holds a Master's degree in Structural Engineering, bringing a solid analytical and problem-solving mindset to software engineering. Certified in .Net/C# and possesses additional web development skills with qualifications in HTML, CSS, and SEO. Committed to best practices and methodologies like SOLID, CQRS, and experienced in working with IIS and implementing server-side pagination. Effective at working with geospatial databases and GIS technologies, demonstrating versatility and capability in tackling diverse software challenges.

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SOLID   3 yr.


TypeScript   3 yr.


JavaScript   3 yr.





EF Core

EF Core

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Dmitry Travkin, Automation QA Engineer

Odesa, Ukraine
Last Updated: 11 Oct 2023

- Dmitry Travkin is an Automation QA Engineer with 3 years of experience. - Background in software testing and automation, with expertise in Java, JavaScript/TypeScript, Selenium, TestNG, and Jenkins. - Skilled in using tools such as JIRA, Git (GitHub, GitLab), Linux, Shell (Bash and PowerShell), Docker, and MongoDB. - He is experienced in CI/CD and has knowledge of SOLID principles. - Dmitry has worked on automation testing for RingCentral analytics, where he designed, developed, and maintained automation tests. - He has also mentored team members and conducted code reviews to maintain code quality. - Dmitry has a computer science education from Beetroot Academy, where he completed both Front-end Basic and Front-end Advanced courses. - He has additional experience in front-end development, including WordPress development and layouts with JS functionality. - Dmitry has a strong technical background and is a quick learner, with good organizational and communication skills.

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Vladyslav Susidko, Software Engineer

Kyiv, Ukraine
Last Updated: 29 Nov 2023

- Expertise in full stack development, possessing an Associate degree in Computer Engineering and a BS in Computer Science, underpinned by a professional background in software engineering since 2019. - Proficient in a broad tech stack, notably C#, .NET (Framework, Core, 5, 6, 7), Entity Framework Core, SQL, and front-end tech including HTML, CSS, SCSS, JavaScript, TypeScript, Angular, with additional expertise in CI/CD pipelines and version control with Git. - Demonstrated capabilities in software design and development, including architecting applications, writing testable code with unit/integration tests, and configuring and managing AWS services. - Proven experience including frontend and backend development, real-time video communication, and complex feature creation for CRM systems and document management platforms. - Practiced in modern software development practices and methodologies such as SOLID principles, MediatR, CQRS, and Docker containerization, guaranteeing adherence to industry best practices and design patterns. - Versatile role involvement from Full Stack to Backend Developer, ensuring comprehensive understanding and execution of project life cycles. - Noted for direct contributions to complex projects with responsibilities covering from code inception to deployment, showcasing proficiency in software development lifecycle (SDLC).

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C   3 yr.


.NET   3 yr.

ASP.NET Core Framework

ASP.NET Core Framework   3 yr.


xunit   2 yr.

Entity Framework

Entity Framework   3 yr.

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This is a super team to work with. Through Upstaff, I have had multiple projects to work on. Work culture has been awesome, teammates have been super nice and collaborative, with a very professional management. There's always a project for you if you're into tech such Front-end, Back-end, Mobile Development, Fullstack, Data Analytics, QA, Machine Learning / AI, Web3, Gaming and lots more. It gets even better because many projects even allow full remote from anywhere! Nice job to the Upstaff Team 🙌🏽.
Vitalii Stalynskyi
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I have been working with Upstaff for over a year on a project related to landscape design and management of contractors in land design projects. During the project, we have done a lot of work on migrating the project to a multitenant architecture and are currently working on new features from the backlog. When we started this project, the hiring processes were organized well. Everything went smoothly, and we were able to start working quickly. Payments always come on time, and there is always support from managers. All issues are resolved quickly. Overall, I am very happy with my experience working with Upstaff, and I recommend them to anyone looking for a new project. They are a reliable company that provides great projects and conditions. I highly recommend them to anyone looking for a partner for their next project.
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We've been with Upstaff for over 2 years, finding great long-term PHP and Android projects for our available developers. The support is constant, and payments are always on time. Upstaff's efficient processes have made our experience satisfying and their reliable assistance has been invaluable.
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I worked with Upstaff engineers for over 2 years, and my experience with them was great. We deployed several individual contributors to clients' implementations and put up two teams of upstaff engineers. Managers' understanding of tech and engineering is head and shoulders above other agencies. They have a solid selection of engineers, each time presented strong candidates. They were able to address our needs and resolve things very fast. Managers and devs were responsive and proactive. Great experience!
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Хочу виразити велику подяку за таку швидку роботу по підбору двох розробників. Та ще й у такий короткий термін-2 дні. Це мене здивувало, адже ми шукали вже цілий місяць. І знайдені кандидати нам не підходили Це щось неймовірне. Доречі, ці кандидати працюють у нас і зараз. Та надать приклад іншим працівникам. Гарного дня!)
Наталья Кравцова
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I discovered an exciting and well-paying project on Upstaff, and I couldn't be happier with my experience. Upstaff's platform is a gem for freelancers like me. It not only connects you with intriguing projects but also ensures fair compensation and a seamless work environment. If you're a programmer seeking quality opportunities, I highly recommend Upstaff.
Leaving a review to express how delighted I am to have found such a great side gig here. The project is intriguing, and I'm really enjoying the team dynamics. I'm also quite satisfied with the compensation aspect. It's crucial to feel valued for the work you put in. Overall, I'm grateful for the opportunity to contribute to this project and share my expertise. I'm thrilled to give a shoutout and recommendation to anyone seeking an engaging and rewarding work opportunity.

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Our journey starts with a 30-minute discovery call to explore your project challenges, technical needs, and team diversity. Meet Carefully Matched SOLID Talents. Within 1-3 days, we’ll share profiles and connect you with the right talents for your project. Schedule a call to meet engineers in person. Validate Your Choice. Bring a new SOLID developer on board with a trial period to confirm that you’ve hired the right one. There are no termination fees or hidden costs.

How does Upstaff vet remote SOLID engineers? Arrow

Upstaff Managers conduct an introductory round with potential candidates to assess their soft skills. Additionally, the talent’s hard skills are evaluated through testing or verification by a qualified developer during a technical interview. The Upstaff Staffing Platform stores data on past and present SOLID candidates. Upstaff managers also assess talent and facilitate rapid work and scalability, offering clients valuable insights into their talent pipeline. Additionally, we have a matching system within the platform that operates in real-time, facilitating efficient pairing of candidates with suitable positions.

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Table of Contents

TOP 10 SOLID Related Technologies

  • Programming Languages

    Programming languages are the backbone of software development. Popular choices include:

    • JavaScript: A versatile language used for both front-end and back-end development. It has a vast ecosystem of frameworks and libraries.
    • Java: Known for its scalability and cross-platform compatibility, Java is widely used in enterprise-level applications.
    • Python: Loved for its simplicity and readability, Python is a popular choice for web development, data analysis, and machine learning.
    • C#: Developed by Microsoft, C# is widely used for Windows applications and game development using the Unity engine.
  • Frameworks

    Frameworks provide a structured approach to software development. Some popular ones are:

    • React: A JavaScript library for building user interfaces, React is widely used for creating dynamic and interactive web applications.
    • Angular: Developed by Google, Angular is a full-featured framework for building large-scale web applications.
    • Spring: A Java framework, Spring simplifies the development of enterprise-level applications by providing extensive features and modules.
    • Django: Built with Python, Django is a high-level framework that enables rapid development of secure and scalable web applications.
  • Version Control Systems

    Version control systems help track and manage code changes. Two widely used options are:

    • Git: Git is a distributed version control system known for its speed, flexibility, and powerful branching capabilities.
    • Subversion (SVN): SVN is a centralized version control system that provides strong support for handling large projects and binary files.
  • Testing Frameworks

    Testing ensures the quality and reliability of software. Some popular testing frameworks are:

    • Jest: A JavaScript testing framework, Jest is widely used for unit testing and provides an intuitive API and powerful mocking capabilities.
    • Selenium: Selenium is a widely adopted testing framework for web applications, allowing automation of browser interactions.
    • JUnit: A Java unit testing framework, JUnit is extensively used for testing Java applications and provides a rich set of assertions.
    • Pytest: Built with Python, Pytest is a simple yet powerful testing framework that offers concise and expressive test cases.

Cases when SOLID does not work

  1. The case of tight coupling: SOLID principles emphasize loose coupling between classes and modules. However, in some scenarios, tight coupling might be necessary for performance optimizations or to achieve specific functionality. For instance, in real-time systems or high-performance computing, minimizing the overhead of loose coupling can be crucial, and adhering strictly to SOLID principles may not be feasible.
  2. Legacy codebases: SOLID principles are best applied when designing new systems or refactoring existing code. However, in large legacy codebases, it may not be practical to refactor the entire codebase to conform to SOLID principles. Legacy systems often have tight dependencies, lack proper abstractions, and may not easily accommodate the separation of concerns advocated by SOLID.
  3. Trade-offs with performance: SOLID principles, particularly the Single Responsibility Principle (SRP), may result in increased overhead due to the need for more classes or interfaces. In performance-critical applications, where every millisecond counts, minimizing the number of method calls and indirections is prioritized over adhering strictly to SOLID principles.
  4. Time and cost constraints: Implementing SOLID principles requires time and effort. In some cases, projects with strict deadlines or limited resources may prioritize getting a functional system up and running quickly rather than investing additional time in adhering to SOLID principles. Balancing project deadlines and resource constraints with the benefits of SOLID principles is essential.
  5. Domain-specific constraints: Certain domains or industries have specific constraints that may not align perfectly with SOLID principles. For example, in embedded systems programming or real-time control systems, memory and processing constraints often take precedence over architectural principles. These contexts require carefully tailored design decisions that may not fully align with SOLID.
  6. Over-engineering: While SOLID principles encourage building flexible and maintainable systems, it is possible to over-engineer solutions by applying SOLID principles excessively. Unnecessarily complex designs can lead to decreased productivity, increased maintenance costs, and unnecessary abstractions that don’t provide significant benefits.

These cases highlight situations where strict adherence to SOLID principles may not be practical or may need to be balanced with other considerations. It is important to evaluate the specific context, requirements, and constraints of a project to determine the appropriate level of adherence to SOLID principles.

Hard skills of a SOLID Developer

Hard skills of a SOLID Developer: The following are the hard skills required for different levels of experience – Junior, Middle, Senior, and Expert/Team Lead.


  • Object-Oriented Programming (OOP): Ability to write code using the principles of OOP, such as encapsulation, inheritance, and polymorphism.
  • Understanding of SOLID Principles: Knowledge of the SOLID principles (Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion) and their application in software design.
  • Version Control Systems: Proficiency in using version control systems like Git to manage and track changes in code.
  • Basic Database Skills: Familiarity with SQL and the ability to write basic database queries.
  • Testing: Understanding of unit testing and the ability to write basic test cases.


  • Design Patterns: Knowledge and application of various design patterns like Factory, Singleton, Observer, etc., to solve common software design problems.
  • Software Architecture: Understanding of software architecture principles and the ability to design scalable and maintainable systems.
  • Web Development: Proficiency in web development frameworks like ASP.NET, Django, or Ruby on Rails.
  • Performance Optimization: Ability to identify and optimize performance bottlenecks in code and improve application performance.
  • Debugging and Troubleshooting: Strong debugging and troubleshooting skills to identify and fix issues in code.
  • Continuous Integration/Continuous Deployment (CI/CD): Experience with CI/CD tools like Jenkins or Travis CI to automate the build and deployment process.
  • Agile Methodologies: Familiarity with Agile methodologies like Scrum or Kanban for efficient project management.


  • Advanced Algorithms and Data Structures: In-depth knowledge of advanced algorithms and data structures to solve complex problems efficiently.
  • Code Review and Mentoring: Ability to conduct code reviews and provide constructive feedback to junior developers, as well as mentor them.
  • Concurrency and Parallelism: Understanding of concurrent programming and parallel computing concepts.
  • Security Best Practices: Knowledge of secure coding practices and the ability to implement security measures to protect against vulnerabilities.
  • System Design: Proficiency in designing large-scale systems, considering factors like scalability, fault-tolerance, and performance.
  • Cloud Technologies: Experience with cloud platforms like AWS, Azure, or GCP, and the ability to deploy and manage applications in the cloud.
  • Big Data and Analytics: Familiarity with big data technologies like Hadoop, Spark, or Kafka for processing and analyzing large datasets.
  • Leadership and Collaboration: Strong leadership skills and the ability to collaborate with cross-functional teams to deliver high-quality software solutions.

Expert/Team Lead

  • Architectural Design: Expertise in designing complex and scalable software architectures, considering factors like modularity, extensibility, and maintainability.
  • Performance Engineering: Deep understanding of performance engineering techniques to optimize system performance and achieve high scalability.
  • Codebase Refactoring: Proficiency in refactoring legacy codebases to improve code quality, maintainability, and extensibility.
  • Technical Strategy and Roadmap: Ability to define technical strategies and roadmaps for software development projects.
  • Team Management: Experience in leading and managing development teams, providing guidance and support to team members.
  • Domain Knowledge: In-depth knowledge of the specific domain or industry the software solution is being developed for.
  • Expertise in Multiple Programming Languages: Proficiency in multiple programming languages and the ability to learn new languages quickly.
  • DevOps Practices: Experience with DevOps practices, including infrastructure automation, continuous delivery, and monitoring.
  • Software Quality Assurance: Knowledge of software quality assurance processes and best practices to ensure high-quality deliverables.
  • Technical Documentation: Ability to create comprehensive technical documentation to facilitate knowledge sharing and maintain system documentation.
  • Client Communication: Excellent communication skills to effectively communicate with clients and stakeholders, understand their requirements, and provide technical guidance.

TOP 14 Facts about SOLID

  • SOLID is an acronym for five software design principles that aim to make software systems more maintainable, scalable, and adaptable.
  • The five principles of SOLID are Single Responsibility Principle (SRP), Open-Closed Principle (OCP), Liskov Substitution Principle (LSP), Interface Segregation Principle (ISP), and Dependency Inversion Principle (DIP).
  • The Single Responsibility Principle (SRP) states that a class should have only one reason to change, meaning that it should have a single responsibility or purpose.
  • The Open-Closed Principle (OCP) states that software entities (classes, modules, functions, etc.) should be open for extension but closed for modification. This principle encourages the use of inheritance and interfaces to enable adding new functionality without changing existing code.
  • The Liskov Substitution Principle (LSP) states that objects of a superclass should be replaceable with objects of its subclasses without affecting the correctness of the program. This principle ensures that inheritance is used correctly and avoids unexpected behavior when substituting objects.
  • The Interface Segregation Principle (ISP) states that clients should not be forced to depend on interfaces they do not use. It promotes the creation of specific interfaces for each client instead of having a single large interface that is implemented by all classes.
  • The Dependency Inversion Principle (DIP) states that high-level modules should not depend on low-level modules; both should depend on abstractions. This principle promotes loose coupling between modules and facilitates easier changes and testing.
  • SOLID principles were coined by Robert C. Martin (also known as Uncle Bob) in the early 2000s, based on earlier principles by Michael Feathers and others.
  • The SOLID principles are widely used in object-oriented design and development, and they help in creating systems that are easier to understand, maintain, and extend.
  • SOLID principles can be applied to various software development languages and paradigms, not just limited to object-oriented programming.
  • Applying SOLID principles can lead to reduced code complexity, increased code reusability, improved testability, and better overall software quality.
  • SOLID principles are closely related to other design principles and patterns, such as the DRY (Don’t Repeat Yourself) principle and the design patterns introduced by the Gang of Four.
  • SOLID principles are not strict rules but rather guidelines that should be interpreted and applied based on specific requirements and context.
  • Understanding and applying SOLID principles requires practice and experience, as they may involve trade-offs and require careful consideration of design choices.
  • There are various tools and frameworks available that can help enforce SOLID principles and provide automated checks for adherence.

TOP 14 Tech facts and history of creation and versions about SOLID Development

  • SOLID is a set of principles for software development that promote maintainability, flexibility, and extensibility.
  • It was introduced by Robert C. Martin (also known as Uncle Bob) in the early 2000s.
  • The SOLID principles are widely adopted in object-oriented programming languages such as Java and C#.
  • The first principle, Single Responsibility Principle (SRP), states that a class should have only one reason to change.
  • The Open/Closed Principle (OCP) encourages software entities to be open for extension but closed for modification.
  • The Liskov Substitution Principle (LSP) defines that objects of a superclass should be replaceable with objects of its subclasses without affecting the correctness of the program.
  • The Interface Segregation Principle (ISP) promotes the idea of clients depending on specific interfaces rather than on large, monolithic interfaces.
  • The Dependency Inversion Principle (DIP) suggests that high-level modules should not depend on low-level modules, but both should depend on abstractions.
  • SOLID principles help developers write clean, modular, and testable code.
  • SOLID principles can lead to reduced software maintenance costs and improved code quality.
  • SOLID principles are applicable to various software development methodologies, including Agile and Waterfall.
  • SOLID principles help in achieving code reusability and reducing code duplication.
  • SOLID principles are not limited to any specific programming language and can be applied across different platforms.
  • SOLID principles are considered fundamental concepts in software engineering and are taught in many computer science courses.

How and where is SOLID used?

Case NameCase Description
Case 1: Modular Software DevelopmentSOLID principles promote modular software development by emphasizing the Single Responsibility Principle (SRP). This principle states that a class should have only one reason to change, meaning it should have a single responsibility. By adhering to this principle, developers can create modular code that is easier to understand, maintain, and extend.
Case 2: Code ReusabilityThe Open-Closed Principle (OCP) in SOLID development encourages code reusability. This principle states that software entities should be open for extension but closed for modification. By designing classes and modules that can be extended without modifying their existing code, developers can reuse existing code components, reducing the effort and time required to develop new features or functionalities.
Case 3: TestabilitySOLID principles contribute to improved testability of software systems. For example, the Dependency Inversion Principle (DIP) promotes loose coupling between modules by relying on abstractions rather than concrete implementations. This allows for easier unit testing, as dependencies can be easily mocked or substituted during testing, enabling isolated and focused testing of individual components.
Case 4: MaintainabilitySOLID development principles enhance the maintainability of software systems. The Single Responsibility Principle (SRP) ensures that each class has a clear and specific responsibility, making it easier to locate and modify code. The Interface Segregation Principle (ISP) avoids bloated interfaces and promotes smaller, focused interfaces, making it simpler to understand and modify related code. These principles collectively contribute to reducing the risk of introducing bugs or unintended side effects when making changes to the codebase.
Case 5: ScalabilitySOLID principles aid in building scalable software systems. The Liskov Substitution Principle (LSP) ensures that derived classes can be substituted for their base classes without affecting the correctness of the program. This allows for the development of pluggable, interchangeable components, facilitating scalability by enabling the addition or substitution of modules or services without disrupting the overall system.
Case 6: Collaborative DevelopmentSOLID principles support collaborative development by providing a common set of guidelines and best practices. Developers familiar with SOLID principles can easily understand and work on each other’s code, resulting in improved collaboration and reduced learning curves. Additionally, SOLID principles promote code readability and clarity, making it easier for multiple developers to collaborate on a project.
Case 7: ExtensibilityThe Open-Closed Principle (OCP) in SOLID development promotes extensibility. By designing software components to be open for extension, developers can add new features or functionalities without modifying existing code. This allows systems to evolve and adapt to changing requirements without the risk of introducing regressions or breaking existing functionality.
Case 8: Code UnderstandabilitySOLID principles enhance code understandability by providing clear guidelines for software design. The Single Responsibility Principle (SRP) ensures that each class has a single responsibility, making it easier to comprehend its purpose and behavior. The Interface Segregation Principle (ISP) promotes smaller, focused interfaces, reducing the cognitive load required to understand a particular component. By adhering to SOLID principles, developers can create code that is easier to read, understand, and maintain.
Case 9: Dependency ManagementSOLID principles assist in managing dependencies within software systems. The Dependency Inversion Principle (DIP) advocates for depending on abstractions rather than concrete implementations. This promotes loose coupling between modules, making it easier to swap out dependencies or introduce new implementations without impacting the overall system. This flexibility simplifies dependency management and reduces the likelihood of tightly coupled and fragile code.
Case 10: Software QualitySOLID development principles contribute to improved software quality. By promoting modularity, reusability, maintainability, and testability, SOLID principles help reduce code complexity and increase code reliability. This leads to fewer bugs, easier debugging, and overall higher software quality. Additionally, adhering to SOLID principles can result in cleaner, more readable code that is less prone to human error or oversight.

Soft skills of a SOLID Developer

Soft skills are an essential component of being a SOLID developer, complementing technical expertise and contributing to overall project success. These skills enable developers to effectively communicate, collaborate, and adapt in a dynamic software development environment.


  • Active Listening: Demonstrates attentiveness and understanding when receiving instructions or feedback from senior developers, team members, or stakeholders.
  • Time Management: Efficiently organizes tasks to meet deadlines and deliver quality code within project constraints.
  • Problem Solving: Applies logical thinking and analytical skills to identify and resolve software issues.
  • Adaptability: Quickly adapts to changes in project requirements, technologies, or team dynamics.
  • Teamwork: Actively participates in team discussions, shares knowledge, and collaborates with colleagues to achieve project goals.


  • Effective Communication: Clearly articulates ideas, requirements, and technical concepts to both technical and non-technical stakeholders.
  • Leadership: Takes initiative in guiding junior developers, coordinating tasks, and driving project progress.
  • Mentoring: Shares knowledge and provides guidance to junior developers to help them improve their skills.
  • Critical Thinking: Evaluates complex problems, considers multiple perspectives, and proposes innovative solutions.
  • Conflict Resolution: Resolves conflicts within the team by facilitating open dialogue and finding mutually beneficial resolutions.
  • Continuous Learning: Actively seeks opportunities to enhance technical skills and stay updated with industry trends.
  • Client Relationship Management: Builds and maintains positive relationships with clients, ensuring their needs are understood and addressed.


  • Strategic Thinking: Develops long-term plans and strategies to improve software development processes and achieve business objectives.
  • Project Management: Coordinates multiple projects, allocates resources, and ensures timely delivery of high-quality software.
  • Empathy: Understands the perspectives of team members, stakeholders, and end users, and considers their needs in decision-making.
  • Negotiation: Facilitates win-win agreements with stakeholders, balancing competing interests and priorities.
  • Presentation Skills: Delivers engaging and impactful presentations to both technical and non-technical audiences.
  • Influence: Influences decision-making processes by providing well-reasoned arguments and data-driven insights.
  • Quality Assurance: Implements and oversees quality assurance processes to ensure software reliability and maintainability.
  • Strategic Collaboration: Collaborates with other departments or organizations to drive innovation and achieve shared goals.

Expert/Team Lead

  • Strategic Planning: Develops and executes long-term strategies to align software development with business objectives.
  • Team Management: Leads and inspires a team of developers, fostering a positive and productive work environment.
  • Conflict Management: Resolves conflicts at a team or organizational level, promoting healthy communication and collaboration.
  • Decision Making: Makes informed decisions based on comprehensive analysis, considering technical, business, and organizational factors.
  • Change Management: Guides teams through organizational changes, ensuring smooth transitions and minimal disruption.
  • Business Acumen: Understands the business context and aligns software development efforts with broader organizational goals.
  • Risk Management: Identifies and mitigates risks associated with software development projects, ensuring project success.
  • Innovation: Encourages and fosters a culture of innovation within the team, driving continuous improvement and creativity.
  • Strategic Partnerships: Establishes and nurtures strategic partnerships with external stakeholders to drive business growth.
  • Technical Leadership: Demonstrates exceptional technical expertise and provides technical guidance to the team.
  • Conflict Resolution: Resolves complex conflicts within and across teams, fostering collaboration and maintaining team cohesion.

Let’s consider Difference between Junior, Middle, Senior, Expert/Team Lead developer roles.

Seniority NameYears of experienceResponsibilities and activitiesAverage salary (USD/year)
Junior0-2 yearsAssisting in the development of software applications, debugging and troubleshooting code, learning and applying new technologies, collaborating with the team on smaller projects.$50,000 – $70,000
Middle2-5 yearsParticipating in the design and development of software applications, writing and maintaining code, collaborating with team members on larger projects, conducting code reviews, providing technical guidance to junior developers.$70,000 – $90,000
Senior5+ yearsLeading the design and development of complex software applications, mentoring and providing technical guidance to junior and middle developers, conducting code reviews, optimizing code performance, collaborating with stakeholders to define project requirements.$90,000 – $120,000
Expert/Team Lead8+ yearsLeading a team of developers, setting technical direction and standards, overseeing multiple projects, providing strategic guidance, conducting performance evaluations, coordinating with other teams and stakeholders, ensuring high-quality deliverables.$120,000 – $150,000

What are top SOLID instruments and tools?

  • SOLIDWORKS: SOLIDWORKS is a 3D computer-aided design (CAD) software that was first released in 1995. It is developed by Dassault Systèmes and is widely used in various industries such as aerospace, automotive, and consumer goods. SOLIDWORKS offers a range of powerful features for designing and simulating 3D models, making it a popular choice among engineers and designers.
  • Autodesk Inventor: Autodesk Inventor is another popular CAD software that focuses on 3D mechanical design, simulation, and documentation. It was first introduced in 1999 by Autodesk and has since gained a strong user base. Inventor offers a comprehensive set of tools for creating and visualizing 3D models, as well as generating engineering drawings and documentation.
  • CATIA: CATIA (Computer-Aided Three-Dimensional Interactive Application) is a multi-platform CAD/CAM/CAE software suite developed by Dassault Systèmes. It was initially released in 1977 and has become one of the leading CAD software in the aerospace and automotive industries. CATIA offers advanced features for complex 3D modeling, analysis, and simulation, making it suitable for large-scale projects.
  • PTC Creo: PTC Creo, formerly known as Pro/ENGINEER, is a parametric 3D CAD software developed by PTC. It was first released in 1987 and has evolved into a comprehensive suite of design, simulation, and manufacturing tools. Creo is widely used in industries such as manufacturing, engineering, and product development, offering capabilities for both solid modeling and surface modeling.
  • Fusion 360: Fusion 360 is a cloud-based CAD/CAM software developed by Autodesk. It was launched in 2013 and has gained popularity for its user-friendly interface and collaborative features. Fusion 360 offers a wide range of tools for 3D modeling, simulation, and machining, making it suitable for both professional designers and hobbyists.
  • SOLIDWORKS Simulation: SOLIDWORKS Simulation is a powerful tool for performing virtual testing and analysis of designs. It is integrated with the SOLIDWORKS CAD software and provides capabilities for structural analysis, thermal analysis, and fluid flow simulation. SOLIDWORKS Simulation helps engineers optimize their designs, reduce prototyping costs, and improve product performance.
  • Ansys: Ansys is a leading engineering simulation software that offers a wide range of tools for finite element analysis (FEA), computational fluid dynamics (CFD), and electromagnetics simulation. It was first released in 1970 and has become a standard tool in industries such as aerospace, automotive, and energy. Ansys provides advanced simulation capabilities to help engineers optimize designs and solve complex engineering problems.

Pros & cons of SOLID

8 Pros of SOLID

  • SOLID principles help in designing software that is easy to understand and maintain.
  • SOLID promotes code reusability, as it encourages the creation of modular and loosely coupled components.
  • By adhering to SOLID principles, developers can create code that is more flexible and adaptable to change.
  • SOLID principles enhance testability, making it easier to write unit tests and ensure the correctness of the code.
  • SOLID helps in reducing code duplication, leading to cleaner and more efficient code.
  • By following SOLID principles, developers can achieve better separation of concerns, making the codebase more organized and manageable.
  • SOLID principles facilitate collaboration among developers, as the code becomes more readable and easier to work with.
  • By applying SOLID principles, developers can build software systems that are more scalable and extensible.

8 Cons of SOLID

  • Applying SOLID principles can increase the complexity of the code, especially for beginners or those not familiar with the principles.
  • Implementing SOLID principles may require additional time and effort during the initial development phase.
  • SOLID principles may not always be applicable in all scenarios, leading to unnecessary abstraction or over-engineering.
  • Following SOLID principles strictly can sometimes lead to trade-offs in performance or efficiency.
  • Applying SOLID principles may require developers to have a deep understanding of the underlying design patterns and principles.
  • Adopting SOLID principles in an existing codebase may require significant refactoring and can introduce risks if not done carefully.
  • Not all developers may agree on the interpretation or implementation of SOLID principles, leading to conflicts or inconsistencies in the codebase.
  • Applying SOLID principles may require additional training and education for developers to fully grasp and apply the concepts effectively.

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