Oleh Tsyupa
@olehtsyupa
Senior backend engineer specializing in Web3/DeFi, scalable systems, and reliable production APIs.
What I'm looking for
Senior Backend Engineer with 8+ years of experience building scalable backend systems, production APIs, and cloud infrastructure.
Built sub-millisecond orderbook aggregation systems for DeFi trading at PancakeSwap. Experienced in REST and WebSocket APIs, on-chain and off-chain data integration, and designing, deploying, and maintaining backend infrastructure with Kubernetes, CI/CD pipelines, and cloud platforms.
Comfortable working as a senior individual contributor with lead-level responsibility, focused on system reliability and long-term maintainability.
Experience
Work history, roles, and key accomplishments
Senior Backend Engineer
Self-employed
Mar 2025 - Present (10 months)
Designed and operated backend systems for a SaaS product (PDFTrackr) using Node.js, PostgreSQL, Redis, and Cloudflare; implemented secure file-processing workflows and AI-assisted backend pipelines to ensure reliable analytics and access control.
Senior Backend Engineer
PancakeSwap
Apr 2024 - Feb 2025 (10 months)
Led backend and DevOps teams to build sub-millisecond orderbook aggregation across liquidity sources and maintain scalable REST/WebSocket trading APIs; architected blockchain data ingestion and enforced reliability with Kubernetes and CI/CD.
Senior Backend Engineer
PancakeSwap
Jan 2023 - Apr 2024 (1 year 3 months)
Built high-performance services for price tracking, historical data aggregation, and portfolio monitoring; implemented caching, transaction indexing, and managed cloud deployments (AWS/DigitalOcean/Vercel) with Kubernetes and observability tooling to maintain high uptime.
Backend Engineer
Binance
Apr 2020 - Dec 2022 (2 years 8 months)
Owned backend development for Binance Academy and internal platform services, delivering CMS-backed content workflows, campaigns, and analytics while operating production deployments, CI/CD pipelines, and reliability monitoring.
Backend Engineer
Micazook
Nov 2018 - Apr 2020 (1 year 5 months)
Led web app development with React/TypeScript and built backend services using Java and Spring Boot; migrated a legacy codebase to microservices and mentored junior developers to improve code quality.
Backend Engineer
Micazook
Oct 2017 - Oct 2018 (1 year)
Developed media content platforms and microservices for XML/XSLT processing using Spring Boot, Apache Camel, and ActiveMQ to support content workflows and integrations.
QA Specialist
Credit Suisse
Jul 2014 - Sep 2016 (2 years 2 months)
Designed automated test suites for Java RESTful services and web applications and developed test automation scripts to streamline QA workflows and improve release quality.
Education
Degrees, certifications, and relevant coursework
University of Wrocław
Bachelor of Science, Computer Science
Completed a Bachelor of Science in Computer Science, covering core computer science topics and practical software development skills.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Salary expectations
Social media
Job categories
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