Jurijs R.

I help companies build and stabilize back-end systems for finance, trading, accounting, billing, telemetry and security monitoring. These are systems where wrong numbers, missing records or downtime are not acceptable. For more than 15 years I have been working with production systems that process real money, operational events and security signals. My focus is data consistency, fault tolerance, clear business logic and predictable performance over years, not weeks. My experience includes real time data processing for trading and alarm monitoring, calculation engines for financial and operational metrics, reporting systems, and integrations between accounting, billing and internal business applications. I am comfortable working on live systems, improving them step by step without breaking daily operations. On the technical side I work mainly with Ruby on Rails, PostgreSQL, MySQL or MariaDB, Redis and background jobs, plus business critical third party APIs and internal services. If you need a senior back-end engineer to design, extend or stabilize a business critical system, I can help you make it reliable and easier to maintain.