Open to opportunities

Valentin Tsybin

@valentintsybin

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Lead Golang engineer building scalable, cloud-native microservices for FinTech and crypto.

Portugal

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What I'm looking for

I seek senior backend or lead engineering roles focused on Go, cloud-native systems, high performance, and strong cross-functional collaboration in FinTech/crypto.

I am a Lead Backend Engineer with 14+ years in software development and over a decade working in Go, specializing in cloud-native architectures, high-performance microservices, and blockchain integrations. I have led and mentored teams up to 11 engineers, delivered low-latency trading systems, and driven reliability and observability improvements across production platforms.

My background spans FinTech, crypto, and large-scale e-commerce, where I designed scalable services, optimized performance, and managed AWS/Kubernetes infrastructure. I focus on business efficiency, measurable impact (latency and uptime improvements), and close cross-functional collaboration to deliver robust, production-grade systems.

Experience

Work history, roles, and key accomplishments

Current

Lead Backend Engineer

Current

Rho Labs

Feb 2025 - Present (11 months)

Leading backend development for a DeFi platform, implemented on-chain data integrations and analytics pipelines, and introduced observability standards to improve reliability and scalability.

Golang Kubernetes AWS PostgreSQL Redis Kafka Observability Microservices

Team Lead Golang

Tothemoon

May 2022 - Feb 2025 (2 years 9 months)

Led backend team for a global crypto exchange, designed low-latency microservices and order-matching components, and reduced downtime through incident response and performance tuning.

Golang Microservices Performance Tuning Matching Kafka AWS Monitoring DevOps

Team Lead Golang

Ozon

Sep 2019 - May 2022 (2 years 8 months)

Led backend development for high-load e-commerce services, built scalable microservices serving millions of users daily and established CI/CD and monitoring practices to achieve 99.9% uptime.

Golang Microservices CI CD Kubernetes PostgreSQL Redis Monitoring Team Leadership

Senior Golang Developer

QuadCode

Apr 2017 - Aug 2019 (2 years 4 months)

Developed and maintained Go microservices for trading and financial applications, improved API reliability and introduced unit testing practices to raise coverage and stability.

Golang Microservices Testing REST APIs Agile Scrum CI CD PostgreSQL Observability

Golang Developer

MoeVideo

Oct 2016 - Apr 2017 (6 months)

Contributed to a video advertising and RTB platform by developing AdServer components and optimizing real-time bidding modules for millisecond-level auction processing.