Senior Node.js Full Stack Engineer

About the Position

Senior Node.js Full Stack Engineer

Join rinf.tech as a Senior Node.js Full Stack Engineer. Lead technical design, improve performance, and drive observability standards in a remote role.

Responsibilities

• Lead the technical design of complex features and write technical design documents and architecture decision records.
• Own end-to-end delivery of large initiatives, breaking them into increments the team can ship.
• Design solid event-driven flows: event contracts, versioning, duplicate-safe processing, retries, failed-message handling, and replay.
• Design for multi-tenancy, security, and access control (Keycloak/OIDC, role-based access, tenant isolation).
• Improve performance and reliability across Node.js services, PostgreSQL, and queue processing.
• Drive observability standards (structured logging, OpenTelemetry tracing, Prometheus metrics, Grafana alerts) and reduce operational noise.
• Set and model engineering standards: code quality, testing strategy (unit, integration, contract), CI/CD practices.
• Work with QA to make the system easy to test and to keep end-to-end automation stable and fast.
• Review designs and code across the team, and mentor mid-level and junior engineers.
• Lead or support incident response and run blameless post-incident reviews.
• Work with architects and other Phenom/ReX teams on cross-team dependencies and shared platform decisions.
• Help with hiring, interviews, and onboarding.

Requirements

• 6+ years of professional software engineering, with a strong focus on JavaScript/TypeScript.
• Deep expertise in Node.js back-end development and strong working knowledge of React.
• Proven experience designing and running distributed, event-driven systems (queues, pub/sub, background jobs) in production.
• Strong experience with API design (GraphQL and/or REST) and relational data modeling (PostgreSQL).
• Track record of leading technical design and delivering complex features across teams.
• Hands-on experience with observability and production operations: metrics, logs, tracing, alerting, incident handling.
• Solid understanding of security basics: authentication and authorization, role-based access, secure handling of sensitive data.
• Experience with cloud-native deployment (AWS, Docker, Kubernetes).
• Experience mentoring engineers and shaping team engineering practices.
• Clear written and spoken communication with both technical and non-technical stakeholders.

Nice to Have

• Experience building multi-tenant or whitelabel SaaS products.
• Experience splitting services out of a monolith or modular monolith.
• Experience with document or file-processing pipelines and third-party integrity or compliance integrations.
• OpenTelemetry, Grafana (Loki/Tempo), and Prometheus at scale.
• Contract testing (e.g., consumer-driven contracts for APIs and events).
• Background in academic publishing, research integrity, or regulated domains.

We Offer

• Flexible working environment, ability to work remotely or in a hybrid model, depending on your project requirements.
• Work with worldwide technology leaders - We partner and deliver technology to industry giants like Intel, NXP, Panasonic, Visteon, Carrefour, Windriver, Kardex, METRO Digital, and many others.
• Priority Plus Medical Subscription @Regina Maria (fully covered by the company).
• Mental Health Online Resources through the Hilio Wellbeing Platform.
• Flexible benefits worth 1300 RON gross per month - you can choose the ones that suit your preference.
• We have profit shares schemed that enable you to financially benefit from the new business you identify.
• We have premium referral bonus for each successful recommendation you make - (500-1500 EUR NET based on seniority).
• Enjoy our vibrant offices in Romania's top IT hubs – Bucharest, Timisoara, Cluj, and Iasi, perfect for when you want to grab a coffee with your colleagues.
• Community – No man is an island, we stay connected through ongoing learning, project rotation, idea incubation, as well as through our Football Team, Townhalls, and Fun Thursday Office Day!

About the Company

At rinf.tech, you’ll encounter friendly people who are eager to explore and reinvent the world of technology. We encourage ideas - we like to share and learn from each other. We’re all in for curious & ambitious people.

We continuously invest in developing core teams focused on technologies like Blockchain, AI, and IoT - www.rinf.tech/careers/core-blockchain-and-ai-teams/. Our Technical Management team possesses a robust technical background. Many of our team members have advanced to strategic roles through internal promotions. In a state of mutual willingness to share & grow, our RINFers commit to a minimum tenure of 2.5 years on a project.

We inspire one another to share our tech-works in this amazing and abundant world. So we became developers, innovators, thinkers, software builders, and hardware makers!

Founded in 2006 with 650+ engineers & global presence (8 delivery centers in Europe & North America), we strive to become a leading East-European technology partner for growing organizations in need of digital transformation of their products and services!

Next Steps for You

• Apply
• CV screening
• HR Interview
• Technical Interview
• Offer presented by our CEO

Meet us!

Let's meet! We invite you to drop by anytime for a tour of our office, without any commitment.

Join the #PeopleofManyTalents #EngineerOfTheFuture