Open to opportunities

Anton User

@antonuser11

Message

I build high-scale payment and distributed backend platforms.

Cyprus

Message

What I'm looking for

I'm looking for remote software engineering work where I can lead backend architecture and delivery for distributed systems, payments, APIs, and high-load platforms, with ownership from design through production operations.

At Mercuryo, I build reliable payment flows with asynchronous processing, RabbitMQ, Redis caching, observability, and AI-assisted engineering workflows. I reduced Merchant API response times by about 30% and help modernize legacy backend modules into independently deployable services.

Previously at Airalo, I led backend architecture for a global eSIM platform serving 10M+ users, including JWT authorization, Mastercard loyalty integrations, and distributed-service delivery. At Paxful, I owned architecture and releases for high-scale trading features, built mobile APIs and event-driven services, and mentored backend engineers.

Across FinTech, payments, marketplaces, and travel platforms, I focus on distributed systems, API platforms, asynchronous processing, database performance, observability, and production-oriented delivery.

Experience

Work history, roles, and key accomplishments

Current

Lead Backend Engineer

Current

Mercuryo

Jan 2025 - Present (1 year 7 months)

Designed and implemented integration with a crypto payment provider, building reliable asynchronous transaction processing flows with RabbitMQ, idempotent consumers, retry mechanisms, and failure recovery. Reduced Merchant API response times by ~30% (1.5s → 1.0s) by optimizing high-load SQL queries and introducing Redis-backed caching for frequently accessed payment data.

MySQL Redis RabbitMQ AWS Docker Helm Grafana PHPStan Rector GitHub Actions

Education

Degrees, certifications, and relevant coursework

Obninsk Institute of Atomic Energy at National Nuclear Research University MEPhI

Higher Education, Applied Mathematics and Computer Science

2011 -

Pursued higher education in Applied Mathematics and Computer Science at Obninsk Institute of Atomic Energy, part of National Nuclear Research University MEPhI.