Upstaff Developer Profile Directory

Software engineer with 5+ years of IT experience, starting as an automated systems technician, evolving into a full-stack JavaScript developer. Excelled in backend development, legacy code optimization, and new functionality implementation in complex logistics and CRM applications. Proficient in cutting-edge JS frameworks and a multitude of databases, boasting a track record of building microservices architectures and developing scalable, fault-tolerant systems. Adept at optimizing SQL queries, integrating APIs, and crafting performant web applications with high unit test coverage. The engineer's portfolio includes delivering robust solutions for logistics, casino networks, and educational platforms, demonstrating strong problem-solving capabilities and technical versatility.

A full stack software engineer with 4+ years of experience specializing in web development for domains such as e-commerce, adTech, and media. Expertise in JavaScript, TypeScript, and PHP with hands-on experience in key backend technologies including Node.js, Nest JS, Express.js, and Laravel, as well as front-end development with React.js and associated technologies. Proven track record in implementing complex database schemas, facilitating efficient communication with RabbitMQ, and ensuring platform security with OAuth2. Solid foundation in cloud services (AWS, GCP), DevOps (Docker), and automated testing (Jest), reflecting a versatile and adaptive technical skillset.

Software Engineer with 4+ years in the industry, notably in financial, ERP, and e-commerce domains. Strong emphasis on full-stack development with key expertise in JavaScript, TypeScript, Node.js, and React.js. Proficient in a variety of frameworks and tools including Nest JS, Redux, Mongoose, Docker, and AWS cloud services. Experienced in Agile/Scrum methodologies and champion of software development best practices. Notable achievements include designing and implementing APIs, microservices architecture, and optimizing application performance. Instrumental in driving project success through robust testing, CI/CD implementation, and meticulous refactoring.

Software Engineer with over 4 years of full-stack development experience in e-commerce, adTech, and media domains, specializing in JavaScript and TypeScript. Proven track record in building web applications utilizing technologies such as Node.js, Nest JS, React.js, and extensive experience with SQL and NoSQL databases. Adept at cloud services (AWS, GCP), devOps tools like Docker, and has a deep understanding of software development best practices including Agile and Scrum methodologies. Contributed significantly to key projects including a sports betting platform and outdoor advertising space platform, demonstrating skills in database schema deployment, message brokering with RabbitMQ, and optimizing user experiences. Strong emphasis on clean, maintainable code, and efficient development workflows, underscored by successes in system security, performance, and scalability.

Software Engineer with 5 years of experience, specializing in backend and frontend development, as well as DevOps practices. Proficient in Python, JavaScript, and TypeScript, with extensive knowledge of frameworks like FastAPI, Django, Flask, React, and Redux. Demonstrates a strong background in Computer Science and Software Engineering with tangible success in designing robust systems, including microservices and monoliths. Proven expertise with cloud platforms AWS and Azure, and in utilizing various databases such as PostgreSQL, Redis, MongoDB, and DynamoDB. Skilled in CI/CD implementation, containerization with Docker and Kubernetes, and infrastructure as code with Terraform. Impressive track record of project roles, emphasizing performance optimization, architectural design, and integration of machine learning models into production. Holds a significant portfolio of projects across diverse domains such as logistics, social life science, and healthcare.

14 years of professional expertise in IT industry; 12+ years using Ruby on Rails framework and Rails ecosystem; 4+ years using JavaScript; (Angular JS, React JS, Backbone Js, Vue Js, Vanila Js) Rich experience in Web development using JQuery, CSS, HTML, Bootstrap, 3 less); Experience in databases: PostgreSQL, Mongo DB; Agile CRM

- Expert DevOps Engineer and IT Specialist with a record of developing and supporting robust IT infrastructure in e-commerce and logistics industries. - Demonstrable experience with cloud environments including AWS, GCP, and Azure, and proficiency in managing Linux and Windows servers. - Strong background in system administration, mail server configuration, network engineering with Mikrotik, and ITIL-based monitoring systems like Zabbix. - Equipped with solid development skills in Python, PHP, and modern automation tools such as Docker and Jenkins. - Proven ability to lead IT projects and implement effective CI/CD pipelines, underpinned by a deep understanding of Agile, SCRUM, and KANBAN methodologies. - Holds an Engineering degree and diverse IT certifications, reflecting a commitment to continual learning and professional development. - Upper-Intermediate English

- With over a decade of progressive experience in software development and leadership, the engineer showcases a rich portfolio of technical expertise and successful project executions. - Holding a strong foundation with an Engineering degree in Computer Science, the individual commands an authoritative understanding of software architecture, security, and diverse programming languages including C#, .NET frameworks, and RESTful services. - Proven leadership as a team lead is evident in guiding teams to craft tailored hardware and software solutions. - Credentialed with Microsoft certified professional developer and technology specialist certifications, the candidate applies industry-standard methodologies such as Agile/Scrum and Azure DevOps to drive software development lifecycle. - A practical problem-solver, they prioritize maintainability and user-centric design, underpinned by a philosophy of ‘fail-early’ principles and direct communication.

- Highly motivated and accomplished DevOps and Security Engineer with a solid four-year career history in the dynamic software development industry. - Dedicated to delivering unwavering infrastructure support and expert consultation, consistently enhancing the performance and security of organizations across various domains. - Passionate about optimizing business operations, automating processes, and safeguarding company resources. - Possess a versatile skill set spanning multiple technologies and driven to embrace fresh challenges for continuous professional growth. - Upper-Intermediate English

- 6+ years of professional expertise in IT industry; - Solid experience in Java and related technologies; - Hands-on experience with Microservices architecture; - Hands-on DevOps experience; - Has experience as a teacher/instructor Java; - Good logical thinking, self-learning, high level of responsibility. - Hard-working, result-oriented, creative and communicative, team player. - Upper-Intermediate English - Availability starting from 2nd of January

With over 15 years of intense experience in Linux/System/Network/DevOps Administration and Engineering, the candidate showcases an exceptional grasp of technologies like Kubernetes, HELM, Rook Ceph, and HashiCorp Vault/Consul. Devoted to continuous integration and deployment, they adeptly handle Jenkins, TeamCity, and Gitlab-CI, and demonstrate proficiency in network protocols and security. Their cloud knowledge extends through AWS, Digital Ocean, and Google Cloud Platform. Key languages include Python and Bash, emphasizing their fluency in Python for web automation, data scraping, and back-end development. They have contributed significantly to the success of projects within the MarTech/AdTech, government, and retail industries, sharpening their skills in automation, system monitoring, and infrastructure management.

Senior Android Engineer with over a decade of experience in building commercial applications, expertly versed in Android SDK, Kotlin, Java, and a variety of frameworks and libraries such as Retrofit, Moxy, Dagger 2, and Jetpack compose. Highly skilled in object-oriented architecture, patterns, and network communication protocols like MQTT and HTTP/HTTPS, with proficiency in Binary Data Protocols and general algorithm construction. Demonstrates a solid track record in leading teams through the full lifecycle of application development, from requirement gathering to deployment on the Google Play Store. Holds a Ph.D. in Computer Sciences and excels in a fast-paced agile environment, bringing a wealth of knowledge in architecture solutions, API design collaboration, and advanced Android UI/UX. Recognized for leadership, impeccable time management, and effective communication skills alongside a commitment to code quality and software excellence.

Programming languages: Python, Java, Django, C++, C#, JavaScript, Assembler Development tools: PyCharm, Eclipse, IDEA, Visual Studio, Android Studio, QT Creator, Masm Operating systems: Windows, Linux, Azure Other: Development ERP system(odoo), Android development, Object modeling, Design Patterns, UML, Solid, Pattern programing Version control systems: Git

- Experienced Blockchain Developer / Software Engineer with 6 years of experience in crypto financial and DeFi domains. - Proficient in programming languages such as Solidity, Python, and JavaScript. - Strong expertise in blockchain technologies including Uniswap, Ethereum, Polygon, SSV.Network, and wallet integrations. - Skilled in backend development using frameworks like FastAPI, Flask, and Node.js. - Familiar with message brokers like Kafka and cloud platforms like AWS and Azure. - Proficient in DevOps tools like Docker, Kubernetes, and Helm. - Experienced in working with databases like PostgreSQL, MongoDB, and DynamoDB. - Strong knowledge of source control systems like Git, Bitbucket, and GitHub. - Demonstrated ability to design REST API schemas and architect DAO systems. - Proven track record in blockchain development, smart contract optimization, and security audits. - Experienced in setting up and configuring network parameters and implementing identity and access controls. - Proficient in setting up CI/CD pipelines and conducting code reviews. - Skilled in implementing and managing smart contracts compliant with relevant laws and regulations. - Experienced in optimizing storage and computation within smart contracts to minimize transaction costs. - Strong knowledge of SDLC, software development practices, and software engineering principles. - Excellent communication and team collaboration skills. - Computer Science and Software Engineering education background. - Proven ability to find common language with the team and lead on various projects.

- A software engineer with over 5 years of experience in e-commerce and FinTech domains. - Boasts a strong grasp of Java, Kotlin, JavaScript, and TypeScript, having used them in various projects. - Proficient in back-end development with advanced knowledge of Spring frameworks, Hibernate, REST API design, and integrating systems like Elasticsearch and Kafka. - Has experience in integration payment systems such as Google Pay and Apple Pay. - Skilled in database management systems such as PostgreSQL, MySQL, and MongoDB. - Demonstrates expertise in containerization with Docker and Kubernetes and is adept in CI/CD practices using tools like GitLab CI/CD and Jenkins.

- DevOps Engineer/System Engineer/Solution Architect with a robust 19-year background in the IT field, particularly in the FMCG, Telecom, and Gaming sectors. - Skilled in Suse, HP/Dell/Supermicro Products, Linux System Administration, Brocade Fibre Switches, and Software Installation. - Strong information technology professional with good interpersonal and communication skills. - Good troubleshooting and analytical skills.

- Skilled Senior DevOps engineer with 10+ years of hands-on experience in IT and hands-on experience with blockchain technology as well as supporting, automating, and optimizing critical deployments in AWS, leveraging configuration management, CI/CD, and DevOps processes. Amir has good problem-solving skills combined with analytical thinking. - Having the following certifications: AWS Certified SysOps Administrator – Associate 2020; Kubernetes Administrator (CKA) 2019, Kubernetes Application Developer (CKAD) 2019; Advanced Linux System Administrator 2013, Microsoft Certified IT Professional (MCITP) 2011 - Advanced English.

- Full-Stack Developer with experience in various projects, including military weapon maintenance, truck analytics, app store launch, social benefits management, ISP monitoring, and router web interface. - Over 6 years of experience and a solid background in object-oriented analysis and design, comprehensive knowledge of system development life cycle, physical and logical data modeling, performance tuning, and enterprise-level system development. - Led a team responsible for data migration to the cloud, enabling server-to-cloud data synchronization and strengthening software security. - Upper-Intermediate English

Software Engineer with over 5 years of experience specializing in full-stack development, particularly with Python and JavaScript (Vue.js). Accrued hands-on expertise through all SDLC phases including architecture design, planning, and development, backed by advanced English and native Ukrainian language proficiency. Holds a Master’s degree in both Computer Science and Law, highlighting a strong academic foundation. Demonstrated technical agility in managing databases like SQL, NoSQL, and DynamoDB, and proficiently employs tools such as Git, Docker, and Jenkins. Track record includes projects like a MedTech web app, integrating jwt tokens and role management systems, and contributing significantly to a German logistics company's data pipeline and REST APIs. Also, played a pivotal backend role in developing two REST APIs for an American education platform, leveraging AWS and Docker. Certified in OOP and Scrum with a commitment to modern software development practices and continuous professional enhancement.

DevOps Engineer with 15 years in IT and 8 specializing in DevOps/SysOps. Expertise in cloud, CI/CD, and security enhancements. Proficient with Kubernetes, Terraform, AWS, and various CI tools. Recognized for infrastructure optimization, cost reduction, and system robustness. Holds an Applied Mathematics degree and is fluent in English and Ukrainian. Portfolios include telecom analytics solutions, SaaS platforms, and system migrations, with a strong focus on scalability, monitoring, and compliance.

DevOps Engineer with over 3 years of experience in support, adept at installing, configuring, and maintaining development environments across AWS, GCP, and other cloud services. With an educational background in Automation and Computer Technologies, the candidate has a solid grounding in UNIX systems and possesses programming skills in Python, Ruby, and other languages. Demonstrates strong expertise in Docker, Kubernetes, CI/CD pipelines through Jenkins, CircleCI, and more. Played a key role in a 2+ year project involving system containerization, role management integration, and DevOps practices in a team setting. Technically proficient in cloud structures, with a concrete understanding of the software development lifecycle and the implementation of modular application architectures.

Skilled and organized software engineer with 5 years of experience specializing in iOS and Flutter development, evidenced by applications successfully launched on the App Store. Holds a Master's degree in Logistics Management, reflecting a strong analytical and problem-solving background. Possesses a comprehensive skill set including Flutter, Xcode, MVC Design Patterns, localization, and REST API integration, complemented by proficiency in Swift, Dart, OOP, and Git. Familiar with collaboration tools such as Jira, Youtrack, and Trello, and has a track record of working effectively in team settings to deliver high-quality software solutions. Demonstrates expertise in full app life cycle, from concept to deployment, as well as maintaining up-to-date knowledge of modern app development practices.

Accomplished Software Engineer boasting a solid educational background with Bachelor's and Master's degrees in technical fields, complemented by a track record of successful UI/UX design projects. Technical proficiency is evidenced by hands-on experience with tools such as Figma, Photoshop, and Illustrator, and reinforced by a deep understanding of design-research methodologies and user-centric development principles. A career highlighted by pivotal wins in prestigious competitions such as the Intel ISEF and a proven entrepreneurial aptitude as CEO of a startup demonstrates a blend of strategic acumen and technical prowess. Engineering excellence is further showcased by the delivery of innovative solutions within broad technology stacks, highlighting expertise in responsive design, prototyping, and collaboration with cross-functional teams to meet diverse client needs.

A seasoned QA Engineer with over 6 years of expertise in automating and manually testing web applications and APIs. Holds an impressive command over creating and maintaining automated test cases with Selenium WebDriver (Java, Maven, TestNG), alongside proficiency in a wide array of testing methodologies such as GUI, regression, and functionality testing. Demonstrates robust experience in database testing with SQL, and is well-versed in CI/CD, Agile methodologies, as well as various development tools like IntelliJ IDEA and Postman. With hands-on practice in environments requiring proficiency in Android Studio, XCode, and database management tools, they are ready to tackle complex QA challenges. The candidate's solid technical foundation is complemented by effective communication skills and a disciplined work approach, promising a valuable addition to any engineering team.

With over 8 years of expertise as an Android application developer, this engineer boasts a robust proficiency with Java, Kotlin, and C++. They have a strong foundation in computer science, having graduated with a specialist degree in Applied Mathematics. Accumulating experience through substantial roles in mid-level to senior, team-lead, and consulting positions, they have successfully executed more than seven long-term projects and numerous short-term engagements. Technical skills include Android SDK, Android NDK, Firebase, Retrofit2, and Dagger 2. They are adept in methodologies such as SDLC and employ engineering principles across different technologies and tools like Android Studio, Git, and Jira. Their noteworthy projects, like the multi-platform HBO GO and the financial service integration in PayKey, underline their capability to deliver complex applications, highlighting an extraordinary blend of technical acumen and practical experience.

- Senior Front-End Developer with 7 years of programming experience, specializing in React and highly skilled in HTML5, CSS, Three.js, JavaScript, TypeScript, PostgreSQL, Redux, and Bootstrap, among other front-end technologies. - Proven track record in full-stack web development, evident from the creation and successful implementation of complex web applications like investment analytics, interactive learning platforms, and real-time streaming services. - Holds a robust educational foundation with a bachelor's degree in Computer Systems and Networks from Uzhhorod National University, demonstrating a strong understanding of theoretical and practical aspects of computer science. - Expertise in SDLC, maintaining high-quality standards through the use of GitHub, GitLab, and Youtrack for version control and project management, showcasing adeptness at coding best practices and efficient teamwork. - Hands-on experience in cross-platform development for Smart TV apps, leveraging technologies like ReactJS and ensuring viewer engagement through interactive features. - Profound experience in building responsive and intuitive user interfaces, as shown by front-end development roles across a diverse set of industries including e-commerce, real estate, gaming, and entertainment. - Fluent in English, with an upper-intermediate proficiency level, facilitating effective communication and collaboration within diverse global teams.

A seasoned software engineer and backend developer with over a decade of experience in the IT industry, specializing in complex backend systems, machine learning, and team leadership. Strong foundation in computer science with an MSc and a PhD in Applied Informatics and Machine Learning from Uzhgorod National University. Proficient in a breadth of technologies including Java, iOS, Android, JavaScript, PHP, Node.js, and Python. Demonstrated ability to spearhead development projects and manage teams, adopting Scrum methodologies and streamlining SDLC processes. Significant expertise in creating robust solutions using Node.js, PostgreSQL, and various cloud services. A proven track record in delivering scalable, high-quality applications for diverse industries, including finance, healthcare, e-commerce, and construction.

Highly experienced backend developer with over five years of experience specializing in commercial application development with Node.js, Ruby on Rails, and front-end technologies including React.js. Holds a Master's Degree in Software Engineering from Uzhgorod National University. Proficient with a suite of databases and services such as PostgreSQL, MySQL, MongoDB, ElasticSearch, RabbitMQ and Redis, with a strong command of API integration (Stripe, PayPal, Twilio). Skilled in DevOps practices and cloud platforms like AWS, Google Cloud, and Heroku. Well-versed in multiple programming languages and frameworks, demonstrating significant technical expertise in JavaScript/TypeScript, Node.js, Nest.js, and Ruby. Successfully applied a deep understanding of software engineering principles, SDLC, and development patterns to a variety of complex projects across different domains.

Senior Developer brings 7+ years of robust experience in software development, specializing in TV and mobile platforms. Proven mastery of BrightScript, Swift/SwiftUI, and Objective-C, with sound knowledge of C++, JavaScript, and MySQL. Displays a solid track record of delivering scalable projects, proficient in TV (Roku, tvOS) and mobile application (iOS) development, including DRM-protected and ad-supported content. Demonstrates competence in various design, architectural patterns, and integration of modern technologies such as In-App Purchases and Push Notifications. Adept at multiple programming paradigms, including MVC, MVP, MVVM, VIPER, and an advocate for agile methodologies. Exhibits strong communication skills, a goal-driven attitude, and an ability to work effectively in collaborative environments. Brings a deep understanding of the software development life cycle, with a Bachelor's in Physics from Uzhgorod National University, supporting a significant technical foundation.

A results-oriented Full Stack Developer with expertise in .NET technologies, including Entity Framework, Umbraco CMS, and ASP.NET, as well as front-end development with JavaScript, TypeScript, and React. Consistently engaged in the development of robust applications and RESTful APIs, having contributed to projects like CRM and web portals with a focus on seamless user interactions and efficient data management. Highly adept in applying software engineering principles such as SOLID and OOP alongside the Onion architectural pattern to ensure maintainable and scalable codebases. Proven ability to manage complex databases with technologies like Azure SQL and MongoDB, while also demonstrating proficiency in deploying applications on Azure. With a BS in Software Engineering and hands-on experience in creating full-stack solutions, this software engineer is positioned to contribute meaningfully to teams and projects that value cutting-edge solutions, code quality, and collaborative effort.

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.

- Full Stack Developer skilled in C#, .NET frameworks, JS/TS, React, Python, and Vue.js. - Proven track record in end-to-end web platform development and maintenance, including custom plugin and component creation, API integration, and microservices implementation. - Fluent in English and Ukrainian, possesses strong communication and teamwork abilities, alongside a solid foundation in problem-solving and software implementation strategies. - Expert in various software development methodologies and architectures, such as SQRS+ES, with hands-on experience in Microsoft Graph API for backend services. - Pragmatic engineer with diverse experience from UI/UX design in React to server-side development in Python, with a comprehensive understanding of database management, entity frameworks, and custom validation logic. - Educational background includes a Bachelor's and Master's degree in Software Engineering from Dnipro National University of Railway Transport and Dnipro University of Technology, Ukraine.