About the role
Simulmedia is seeking an experienced Senior Backend Engineer to join our engineering team, working on the backend and data infrastructure powering our TV advertising platform - spanning National Linear and CTV. This role sits within a distributed system of up to ~30 microservices, and you'll be primarily responsible for building, scaling, and operating backend services - with secondary exposure to backend-for-frontend work in TypeScript/Node. In this role you will work closely with product managers, designers, and data engineers to ensure seamless integration of analytics features into the platform. The ability to frequently iterate and deliver high-quality features that are owned end-to-end is crucial in this role. We're looking for someone who takes ownership, communicates directly and honestly, and cares about the reliability and craft of the systems they build - not just shipping features but understanding how they behave in production. Location: Ukraine is mandatory . Our offices are located in Kyiv and Lviv. Teams are located in Kyiv and Lviv and primarily work remotely with occasional offline meetings. Key
Responsibilities: Design, build, and maintain backend services in Ruby (Roda) operating within a large-scale distributed microservice architecture. Contribute to backend-focused TypeScript/Node.js work, including API design and tRPC procedures, in support of Next.js applications. Own service reliability: instrumentation, monitoring, and observability across services (tracing, metrics, structured logging). Collaborate closely with data engineers on data pipelines, ETL processes, and ensuring clean, well-modeled data flows between services. Investigate and resolve production incidents; contribute to and follow oncall/runbook practices. Design and evolve APIs with strong attention to authentication, authorization, and security best practices. Participate in code reviews, pair programming, and knowledge-sharing sessions to ensure high-quality, maintainable code. Write thorough unit and integration tests for backend services Work independently while communicating clearly across a distributed, cross-functional team
