A Senior Backend / Full Stack Developer with over 5 years of hands-on experience building scalable, high-load B2B and B2C platforms across AdTech, blockchain, e-commerce, fintech, and real-time communication domains. Serhii is strongly focused on business impact, delivering measurable performance improvements such as 100× database query reductions, major latency optimizations, and significant page speed gains.

He is comfortable owning the full SDLC, leading architectural refactors, and working across backend, frontend, and mobile development. Serhii builds scalable APIs, microservices, and data-intensive systems using Python and JavaScript ecosystems, while also delivering responsive web and mobile interfaces. His experience includes cloud infrastructure, CI/CD pipelines, containerization, and database optimization for large-scale systems.

Serhii has worked extensively with startups and growing tech companies, collaborating with cross-functional teams and mentoring engineers while maintaining clean, testable, and well-documented codebases. He is reliable, proactive in communication, and experienced in long-term engagements where ownership and consistency are critical.

If you’re looking for a Senior Backend or Full Stack Developer who delivers performance-driven solutions and scalable architectures, Serhii brings the technical depth and business mindset to move products forward.