Ivan Dolynskyi, Senior Full Stack Developer

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I'm a Senior Full Stack Developer with over 14 years of professional experience delivering scalable web applications, clean code, and reliable architecture. I specialize in building fast, user-friendly and maintainable software using JavaScript, TypeScript and modern web frameworks.

Tech Stack:

- Languages: JavaScript(ES6+), TypeScript, HTML5, CSS3/SASS, PHP, Python.

- Frontend: React, Next.js, Vue, Angular, React Native, Redux, TailwindCSS, Bootstrap, Material UI, Ant Design.

- Backend: Node.js, Express. NextJS, Laravel, Django.

- Databases: PostgreSQL, MongoDB, MySQL, Firebase.

- DevOps & Tools: Docker, Github, Gitlab, AWS, Vercel, CI/CD, Jest.

What I offer:

- End-to-end development of full-stack applications.

- Clean, modular, and testable code with strong documentation.

- Performance optimization & code refactoring.

- API design(REST, GraphQL).

- Scalable architecture and component-based design.

- Agile, collaborative communication with quick turnaround.

Why Clients Choose Me:

- 100% reliable, proactive and professional.

- Fast learner and strong problem-solver.

- Clear and responsive communication.

- Proven track record on complex, mission-critical projects.

Whether you're a startup looking to build your MVP or an enterprise scaling your project, I bring strong technical expertise and a results-oriented mindset to every project.

Let's build something great together!

SWEETSPOT
Senior Full Stack Developer
juli 2021 - maart 2025 (3 jaren en 8 maanden)
Deerlyck, WV, Belgium
Sweetspot is the most popular IT service in Belgium. The main focus of the marketplace is all areas in which remote cooperation.
• Developed reusable React components and custom hooks, resulting in a 50% reduction in development efforts across 3 different projects.
• Improved loading times by 30% and enhanced overall performance by implementing caching techniques, browser optimization techniques, and GZIP compression.
• Engineered the migration of a monolith GraphQL API to microservices architecture using Apollo Federation and Nest.js.
• Enabled high scalability and agility by integrating AWS technology (Lambda, ECS Fargate) and infrastructure code frameworks (Terraform, Serverless). 07/2021 – 03/2025 Deerlijk, Belgium
Torgsoft
Senior Software Engineer
mei 2017 - maart 2021 (3 jaren en 10 maanden)
Kharkiv, Kharkiv Oblast, Ukraine
Torgsoft has compiled a rating of the largest marketplaces in Ukraine based on the Ukrainian Business Award research in 2020.
• Implemented customer-facing user interface (UI) and back-end services for various business processes, including calendar integration, metrics, discounts, stripe integration, and client rescheduling.
• Built 10+ custom React hooks for sharing reusable logic between functional components.
• Enhanced user experiences (UX) by updating 20+ components to match the latest design style guide, while adding animations to refresh the mobile app's overall look and feel.
• Collaborated with design and development teams to revamp the product's visual identity and improve user experience by implementing new design patterns and animations.
• Re-engineered critical modules within a sprint to rely on a centralized library to optimize performance by 28%.

05/2017 – 03/2021 Kharkiv, Ukraine
Computools
Software Developer
augustus 2011 - april 2017 (5 jaren en 8 maanden)
Warsaw, Poland
Computools is an IT Consulting and Custom Software Development Company that designs solutions to help companies meet the needs of tomorrow.
• Streamlined processes by coordinating the transfer of 2,000+ entries of financial data from worldwide production subsidiaries to a single web-based reporting tool.
• Developed 3 cross-platform web apps and web backend using diverse technology stacks such as JavaScript, React, Node, and PHP, leading to increased efficiency.
• Provided good advices on setting up development environment.
• Made improvement suggestions, and established and promoted development guidelines, best practices, and standards.

08/2011 – 04/2017 Warsaw, Poland

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Bachelor of Science in Computer Science
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute"
2010
Bachelor Degree in Computer Science
Junior Specialist (Software Development)
Professional College ofInformation Systems and Technologies of KNEUnamed
2006
Junior Specialist (Software Development)