I build scalable backend systems, event-driven microservices, and transaction-processing platforms.

My primary focus is Python backend engineering and system architecture — from domain modeling and API design to asynchronous communication, database architecture, and production deployment.

• 5+ years of experience in Python backend development
• Designing microservice and event-driven architectures
• Building high-load and transaction-processing systems
• Experience migrating production systems from monoliths to microservices
• Strong focus on reliability, data consistency, idempotency, and scalability
• Based in Portugal and open to international opportunities

Backend Python · FastAPI · Flask · SQLAlchemy

Architecture Microservices · Event-Driven Architecture · Domain-Driven Design (DDD) · REST APIs

Messaging & Data Kafka · RabbitMQ · PostgreSQL · ClickHouse · Redis · MySQL

Cloud & DevOps Docker · AWS · CI/CD · Linux

Security & Reliability JWT · OAuth2 · OTP · RBAC · Idempotency · Distributed Tracing

Frontend & Mobile React · JavaScript · React Native

Some of the systems I've worked on include:

• Financial transaction platforms — ledger-based accounting, fund reservation, atomic operations, idempotency and event deduplication
• Event-driven microservices — Kafka-based communication between independently deployable services
• Zero-downtime migrations — gradual migration from Django monoliths to FastAPI microservices
• Authentication systems — JWT access/refresh tokens, OTP verification and centralized token management
• Analytics pipelines — PostgreSQL → ClickHouse data pipelines for operational reporting
• B2B platforms — backend systems serving 500+ business clients
• Media platforms — S3-based media storage, scheduled content delivery and asynchronous processing

I'm particularly interested in:

• Distributed systems
• Backend architecture
• High-load applications
• FinTech and transaction processing
• Event-driven systems
• Database architecture and performance

LinkedIn: linkedin.com/in/ruslan-prusakov-b101b0221/ Email: ruslan.prusakov@gmail.com Location: Portugal