Hire Vetted Web Application Engineers at Upstaff - Page 14

All vetted software engineers you need to build AI, Web3, and data Products.

  • Dedicated Full-time commitment for long-term or Time& Material for shorter or ongoing support
  • Europe, Israel, LatAm, United States, Asia geography coverage
  • Remote and hybrid engagement
  • Trial period, no termination fees or hidden costs for transparent and risk-free onboarding.
React
Node.js
...
- 5+ years of professional experience using front-end and back-end technologies - Solid experience in building rich web applications (monolith and MSA) using frameworks and libraries such as React, NestJs, Express - Most of the development experience was gained in projects related to business corporate networks, coaching platforms, insurance, fintech, leasing, and event-management systems - Front-end: JavaScript(ES6), React, Redux, Next.js, Redux-saga, Context API, React Hooks, Chartjs, HTML, CSS(SCSS), MaterialUI, AntDesign, Tensorflow - Back-end: NodeJS (Express, NestJS), REST API, Docker, Terraform - Upper-Intermediate English
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Seniority Middle
Location Slovakia
React Native
React
...
- A skilled Mobile Developer with 7+ years of experience - Strong knowledge of Javascript, TypeScript, React.js, React Native, Redux (Thunk, Saga), MobX, and much more - Has strong critical thinking skills, the ability to navigate various data environments, hands-on technical ability in data, and a drive to understand clients’ business - Connects with Product and Engineering teams to produce instrumentation to generate insightful measurements on new and existing products - Works across departments and collaborates with business managers, systems architects, engineering delivery teams, project managers, QA, and operations teams - Upper-Intermediate English
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Seniority Senior
Location Ukraine
Java 3yr.
AuraQuantic 1yr.
Business Process Model and Notation
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- A software engineer with 3 years of experience specializing in web application development and business process modeling. - Has 1+ years of experience with business process modeling using AuraQuantic in a banking project. - Has experience with Cadence. - Skilled in Java, JavaScript, and TypeScript, backed by deep knowledge in Spring Framework, Hibernate, PostgreSQL, and AWS services. - Key projects include developing a banking document management system as well as managing cloud provider infrastructures. - Recognized for implementing robust authentication systems, optimizing database queries, and enhancing user experience through meticulous UI design.
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Seniority Middle
Location Poland
Ruby
JavaScript
...
7+ years of web development experience, during last 4 years I have been dedicated to RoR.
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Seniority Senior
Location Ukraine
JavaScript 3yr.
React 3yr.
TypeScript
...
3 years of experience in development using JavaScript, React.js, react-redux, redux-thunk, TypeScript, HTML, CSS, SCSS , Git. Success-driven team player who continually meets and exceeds goals.
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Seniority Middle
Location Minsk, Belarus
Angular
.NET Core
Oracle Database
...
- .NET + Oracle + Angular 2+ software engineer with over 6 years of experience in software development.- Upper-Intermediate English.- Available ASAP.
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Seniority Middle
Location Ukraine
PHP 7yr.
JavaScript 6yr.
TypeScript 3yr.
Solidity
Vanilla JS
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-Software Engineer with 7 years in the tech industry, with a robust computer science and software engineering background. - Strong knowledge of Vanilla PHP and JavaScript and front-end and back-end development skills. -Expertise spans prominent domains such as eCommercee& retail, Marketplace, Blockchain, Entertainment, Game dev, Social Network, Healthcare, Analytics, Education -Incorporated advanced technologies like Web3.js and Elasticsearch into projects, demonstrating a balance of front-end and back-end skills. -Capabilities extend beyond app architecture, database design, and optimization with MySQL and other databases. -Proven track record of leveraging Docker and Nginx for DevOps, underpinned by a solid grasp of Git. -Has effectively fulfilled the role of Team Lead, showcasing skills in mentorship, code review, and workflow optimization.
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Seniority Senior
Location Poland
JavaScript 6yr.
TypeScript 5yr.
Angular 5yr.
RxJs 5yr.
Angular Material UI 5yr.
...
Software Engineer with 5+ years of extensive experience in front-end development, offering a strong foundation in software engineering and programming principles across multiple platforms. Expertise in JavaScript and TypeScript with a complete command of Angular and related technologies like RxJS, NGRX, and Angular Material. Holds a track record of leading small teams and successfully managing full software development lifecycle for various projects. Demonstrated ability to optimize application performance, manage CI/CD pipelines, and integrate analytic tools to enhance user experience. Technical acumen accentuated by hands-on experience with industry-standard tools such as Git, Jira, and Azure DevOps. Known for excellent problem-solving skills and ability to handle complex development tasks, bringing value to any team through a diligent work ethic, collaborative approach, and forward-thinking mindset.
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Seniority Senior
Location Warsaw, Poland
Java
API
TypeScript
Angular
JavaFX
...
An adept Full Stack Software Developer with over 14 years of comprehensive experience in IT, specializing in Java and Continuous Integration/Continuous Delivery (CI/CD) practices. Technically proficient in developing RESTful APIs, tailoring frontend libraries with Angular and TypeScript, and securing applications with Spring Security. Proven history of leveraging agile methodologies to advance software development life cycle (SDLC) processes in international projects, focusing on industries like gaming and traffic control. Passionate about knowledge sharing, evidenced by contribution to a Java newsletter and mentoring roles. This engineer's history showcases a solid foundation in electrical engineering technologies and a consistent drive for enhancing software manufacturing through innovation and rigorous quality assurance.
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Seniority Senior
Location Bulgaria
Go
...
- Software Engineer with more than 5 years of commercial experience in software development - Experience in developing and using Golang for more than 4 years - Created projects from scratch, and set up CI/CD via GitHub Actions - Experience in MVC that uses Domain-Driven Design architecture, CQRS, Event Sourcing - Hands-on experience with third-party API integration - Upper-Intermediate English - Available from 16.02.2023
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Seniority Senior
Location Canada
Angular
Ionic
.NET
...
- Web and Mobile app developer with 7+ years of experience in the IT industry - Skilled in front-end and back-end development, API integration, optimization, and refactoring. - Proficient in building scalable and high-performance applications using Angular and associated technologies. - Experienced in working with databases, server-side rendering, and cloud platforms such as AWS and Firebase. - 6 years of experience with Angular - 3+ years of experience with Ionic - Upper-Intermediate English - Available ASAP
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Seniority Senior
Location Cherkasy, Ukraine
TypeScript 5yr.
Node.js 4yr.
Express 3yr.
AWS EC2 3yr.
NestJS 2yr.
...
Software Engineer boasting a comprehensive education from Vilnius University and BSTU complemented by a robust professional background with a focus on SaaS and IaaS development. Proficient in a wide array of programming paradigms including OOP, functional, reactive, and process programming. Skilled in Haskell, with a passion for embedding AI and extensive experience in cybersecurity and DeFi, thus reflecting a deep technical expertise. With 5+ years coding in JavaScript/TypeScript and Python, and familiarity with numerous back-end technologies and tools ranging from Node.js to AWS and PostgreSQL, this engineer exemplifies a strong command over modern development practices such as TDD and DDD. Additionally, projects reflect practical experience in data processing, AI model implementation, and system architecture design.
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Seniority Middle
Location Poland
SQL 5yr.
JavaScript 4yr.
Node.js 4yr.
Express 4yr.
NestJS 2yr.
...
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.
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Seniority Middle
Location Poland
JavaScript
Node.js
NestJS
React
Redux
...
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.
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Seniority Middle
Location Georgia
Node.js
React
Redux Thunk
Elasticsearch
Redis
...
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.
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Seniority Senior
Location Georgia
Node.js
React
Redux
Elasticsearch
AWS S3
...
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.
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Seniority Middle
Location Georgia
Python 5yr.
Django 5yr.
JavaScript 3yr.
FastAPI 3yr.
React
...
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.
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Seniority Senior
Location Georgia
Ruby on Rails
PostgreSQL
React
Elasticsearch
Angular
...
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
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Seniority Senior
Location Cherkasy, Ukraine
.NET 5yr.
C 5yr.
Microsoft SQL Server 5yr.
...
- 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.
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Seniority Expert
Location Netherlands
Java
...
- 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
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Seniority Senior
Location Azerbaijan
Python
...
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
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Seniority Senior
Location Kyiv, Ukraine
Java 5yr.
Kotlin 2yr.
...
- 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.
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Seniority Senior
Location Georgia
Java
...
- 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
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Seniority Senior
Location Zaporizhzhya, Ukraine
Python 5yr.
Pandas 2yr.
JavaScript
Vue.js
SQL
...
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.
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Seniority Senior
Location Ukraine
JavaScript 7yr.
HTML5 5yr.
CSS 5yr.
three.js
TypeScript
...
- 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.
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Seniority Senior
Location Ukraine
Java 12yr.
Microsoft Azure API 5yr.
Node.js 3yr.
Python 3yr.
Scrum
...
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.
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Seniority Senior
Location United States
Node.js
Ruby on Rails
Ant Design
TypeScript
Crashlytics
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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.
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Seniority Senior
Location Uzhgorod, Ukraine
Entity Framework
Umbraco
ASP.NET MVC
Razor
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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.
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Seniority Junior
Location Kyiv, Ukraine
TypeScript 3yr.
JavaScript 3yr.
Angular
React
EF Core
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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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Seniority Middle
Location Kyiv, Ukraine
.NET 3yr.
Umbraco 3yr.
React 3yr.
TS/JS 3yr.
...
- 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.
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Seniority Middle
Location Kyiv, Ukraine
JavaScript 2yr.
HTML 2yr.
CSS 2yr.
SQL 2yr.
ASP.NET MVC 2yr.
...
An adept Full Stack Developer, specializing in .NET technologies with experience in front-end and back-end development, demonstrating proficiency with frameworks such as Umbraco CMS and Entity Framework. Renowned for engineering reliable CRM components and resolving complex bugs, the engineer has also shown dexterity in crafting seamless integration across various platforms ranging from desktop applications to cloud services. With an MSc in Computer Science, this software engineer offers a strong theoretical foundation complemented by practical skills in JavaScript, React, LINQ, Vue, and MongoDB. The candidate's work across dynamic environments, including automation and data processing systems, underscores their adaptability and commitment to delivering high-quality software solutions. A proven track record with development methodologies, version control, and serverless computing ensures this engineer can readily contribute to and enhance any technical team.
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Seniority Junior
Location Kyiv, Ukraine
C 3yr.
.NET 3yr.
ASP.NET Core Framework 3yr.
Entity Framework 3yr.
xunit 2yr.
...
- 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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Seniority Middle
Location Kyiv, Ukraine
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