Igor Sergienko
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Senior FullStack Web Developer since 2019

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Projects worked on

Teams leaded

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Experience years

👨‍💻 Who I am?

Fullstack Developer with 5+ years of experience specializing in SaaS platforms, web applications, mobile apps, and backend systems. CS Master's graduate focused on delivering scalable solutions and efficient architectures. Dedicated to solving complex technical challenges and building high-quality software products. Open to collaboration on innovative projects that drive business value.

🎯 What can I help with?

I specialize in end-to-end development from MVP prototyping to production-ready SaaS platforms and mobile applications. My expertise includes full-stack web development, RESTful API design, and scalable backend architecture. I also provide technical consulting services including code reviews, debugging complex issues, refactoring legacy systems, and implementing test coverage. Whether you need help scaling an existing application, optimizing performance, or setting up robust CI/CD pipelines, I can guide your project to success.

⚙️ My development approach

I believe in writing clean, maintainable code that scales with your business needs. My process emphasizes thorough planning, iterative development, and comprehensive testing to ensure reliable software delivery. I prioritize clear communication, detailed documentation, and collaborative problem-solving. Every project receives careful attention to performance optimization, security best practices, and user experience to deliver solutions that truly serve your goals.

💡 Have something on mind?

Interested in collaboration? Let's build something together. Tell me more about your business ideas, concepts and vision by contacting me!

🗣️ What my clients are saying

Igor demonstrated exceptional proficiency in both frontend and backend development during his work on our SaaS MVP. From the outset, he immersed himself fully in the project, contributing significant value from the very first day. His communication skills were outstanding, ensuring smooth and effective collaboration. Igor was highly available and showed a remarkable dedication to his work. I wholeheartedly recommend him for any development projects. His skill set and work ethic are truly commendable, and I eagerly look forward to collaborating with him on future endeavors.
Igor was instrumental in helping me build a SaaS platform from scratch. His expertise in both backend and frontend development was impressive, and he adapted quickly to changes throughout the project. His attention to detail and great taste in UI/UX design made a significant difference in the final product. He also excelled in AI/ChatGPT integration, PWA, mobile-responsive web apps, and worked seamlessly with technologies like MongoDB, Docker, Vercel, Render, Google Cloud, and SendGrid API. I highly recommend working with Igor for any development project!
Fantastic Experience! Igor jumped into the project with speed and skill, delivering a high-quality solution in record time. He quickly understood the task requirements, communicated clearly throughout, and made the process smooth from start to finish. Will work again in the future!
Ihor is a great developer, he provided excellent work. Highly recommend him! Thank you!