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Ivan Dolynskyi Senior Full Stack DeveloperID

Ivan Dolynskyi

Senior Full Stack Developer
  • Suggested rate
    €350 / day
  • Experience8-15 years
  • Response rate100%
  • Response time1 hour
The project will begin once you accept Ivan's quote.
Location and workplace preferences
Location
Antwerpen, Belgium
Remote only
Primarily works remotely
Verifications

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Languages
Check out languages spoken by Ivan
Categories
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Skill set
Industry fields of expertise
E-commerce
Social Networks
Sports
Healthcare Providers
Education Companies
Ivan in a few words
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!
Experience
  • SWEETSPOT
    Senior Full Stack Developer
    July 2021 - March 2025 (3 years and 8 months)
    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
    May 2017 - March 2021 (3 years and 10 months)
    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
    August 2011 - April 2017 (5 years and 8 months)
    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
Recommendations
Education
  • 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)