Viacheslav Petrenko

I build and modernize enterprise applications, taking hands-on ownership from architecture and implementation through testing and delivery. I bring 16 years of commercial Ruby on Rails experience, full-stack development with React, Vue and Angular, and recent Java/Spring, .NET, Python and TypeScript/NestJS work.

Selected work includes company-wide automation for a real estate developer, preserving financial rules and API contracts during Java/Spring modernization; leading the entire QliqSoft healthcare platform transformation for faster feature delivery and higher load; modernizing Sphera supply-chain risk services and developing an authenticated, customer-scoped MCP server; and adopting AI tools at Reeco, including Elasticsearch product discovery and dynamic catalog expansion driven by customer searches.

I also led a veterinary platform transformation through production launch, designed MQTT integration with hardware devices, and built a configurable prompt-to-video pipeline for a mobile app using model APIs and Firebase. My integration work spans PostgreSQL, Kafka, RabbitMQ, Debezium, ClickHouse and REST/gRPC contracts.

Earlier roles include Core Tech Lead at R&R Music Limited (2012–2014), leading a JRuby API platform with Elasticsearch, MongoDB, Redis and Neo4j; Ruby on Rails Developer at Helios Technologies (2012), building advertising-network and media-streaming applications; and Ruby on Rails Developer at GlobalLogic (2010–2012), delivering online education services.

I use Claude Code and Codex throughout the SDLC and integrate AI-assisted development into engineering workflows, with explicit contracts, regression checks and human ownership of the resulting behavior.

Open to remote senior software engineering, technical lead and hands-on architecture roles, as well as contract projects. Available one week after accepting an offer. English: B2 Upper Intermediate.