Senior Backend Developer at Qase
Bangkok City, Thailand
Denis Kolpakov
Council Member
Denis Kolpakov is a distinguished Senior Backend Engineer with nearly a decade of experience building mission-critical, high-load distributed systems. Currently serving at Qase.io as Senior Backend Engineer with primary responsibility for billing infrastructure, he brings exceptional expertise in Go, microservices architecture, and systems operating at massive scale with stringent reliability requirements.
At Avito (2021-2024), Denis established himself as the technical owner of two of the company's top-10 most critical services—the Form Service and Classification Service. The Form Service handled up to 2 million requests per minute while maintaining sub-100ms latency at the 99th percentile and 99.99% availability—directly protecting Avito's core revenue-generating listing flows. Through implementing domain-specific languages for dynamic transformations, sophisticated caching strategies, and adaptive A/B testing frameworks, he reduced average memory consumption by approximately 60% while enabling over thirty internal product teams to iterate rapidly on business logic.
His most significant architectural achievement came through leading the catalog domain extraction project, where he designed a high-performance in-memory faceted search engine using compressed bitmap indexes. This innovation transformed Avito's catalog update cycle from several days to under two hours, enabled non-technical teams to manage catalog metadata autonomously, maintained sub-20ms P99 latency, and reduced infrastructure costs by over 50%.
At Avito (2021-2024), Denis established himself as the technical owner of two of the company's top-10 most critical services—the Form Service and Classification Service. The Form Service handled up to 2 million requests per minute while maintaining sub-100ms latency at the 99th percentile and 99.99% availability—directly protecting Avito's core revenue-generating listing flows. Through implementing domain-specific languages for dynamic transformations, sophisticated caching strategies, and adaptive A/B testing frameworks, he reduced average memory consumption by approximately 60% while enabling over thirty internal product teams to iterate rapidly on business logic.
His most significant architectural achievement came through leading the catalog domain extraction project, where he designed a high-performance in-memory faceted search engine using compressed bitmap indexes. This innovation transformed Avito's catalog update cycle from several days to under two hours, enabled non-technical teams to manage catalog metadata autonomously, maintained sub-20ms P99 latency, and reduced infrastructure costs by over 50%.
Denis's commitment to the engineering community extends significantly beyond his corporate achievements. As an IEEE Senior Member, he actively participates in Senior Member Review Panels. His Telegram channel @algorithmics_cl (approximately 1,600 subscribers) serves as an educational platform for algorithms and problem-solving. His speaking engagements include the "Fast Backend" meetup by Joom and DevFest Omsk 2022, while his interviews have been featured in Tadviser (2023) and Argumenty Nedeli (2025).
What distinguishes Denis is his exceptional combination of deep technical expertise in high-load distributed systems, strategic architectural thinking, and proven track record delivering systems that operate flawlessly at massive scale. His work consistently demonstrates profound understanding of how backend architecture enables business agility—from reducing deployment cycles and infrastructure costs to empowering product teams with reliable foundations. His contributions through IEEE, conference speaking, and mentorship reflect a commitment to elevating the entire engineering profession, positioning him as an ideal candidate for organizations requiring senior engineering leadership that bridges technical excellence with business impact.
What distinguishes Denis is his exceptional combination of deep technical expertise in high-load distributed systems, strategic architectural thinking, and proven track record delivering systems that operate flawlessly at massive scale. His work consistently demonstrates profound understanding of how backend architecture enables business agility—from reducing deployment cycles and infrastructure costs to empowering product teams with reliable foundations. His contributions through IEEE, conference speaking, and mentorship reflect a commitment to elevating the entire engineering profession, positioning him as an ideal candidate for organizations requiring senior engineering leadership that bridges technical excellence with business impact.