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Oleh TsyupaOT
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Oleh Tsyupa

@olehtsyupa

Senior backend engineer specializing in Web3/DeFi, scalable systems, and reliable production APIs.

Poland
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What I'm looking for

I seek senior backend roles in Web3/DeFi or scalable platform teams where I can lead architecture, improve reliability, mentor engineers, and build high-performance production systems.

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

SE
Current

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.

PA

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.

BI

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.

MI

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.

DS

Junior Backend Engineer

DocFlow S.A.

Oct 2016 - Sep 2017 (11 months)

Built RESTful APIs with JAX-RS, developed JavaFX desktop applications, and deployed Java EE applications on WildFly to support enterprise document workflows.

CS

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 logoUW

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.

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Oleh Tsyupa - Senior Backend Engineer - Self-employed | Himalayas