AI vision into execution.
Romanian.
Hiring.
Senior Back-End Engineer
TypeScript · Node.js/NestJS · Next.js · React/React Native
About the role
We’re looking for a product-minded Senior Backend Engineer fluent in TypeScript to design, build, and operate scalable backend services in Node.js (NestJS). You’ll own core data models, APIs, and system integrations that power our mobility platform, ensuring reliability, observability, and performance at scale. While collaboration with front-end teams is key, your focus will be on building robust foundations that enable seamless product experiences end-to-end.
What you’ll do
- Design and implement scalable NestJS services (REST/gRPC), data models, and third-party integrations
- Model and optimize databases (SQL/NoSQL), queries, caching (Redis), and background jobs
- Drive reliability & observability: testing, metrics, tracing, logging, CI/CD
- Own features end-to-end: plan, estimate, implement, test, document, and monitor
- Collaborate with Product & Design to scope MVPs, iterate quickly, and measure impact
You’ll thrive here if you have
- 4-6 years building production backends with TypeScript and Node.js/NestJS (auth, testing, observability, scalable APIs)
- Database fluency (SQL/NoSQL) and ORMs (e.g., MikroORM, TypeORM or similar), plus cloud basics (AWS/GCP)
- Solid testing habits and CI/CD workflows; you value readable, maintainable code
- Some front-end skills with React and Next.js (SSR/SSG, routing, data fetching)
Nice to have
- Event-driven architecture and WebSockets/real-time communications
- Production hardening: logging, metrics, tracing, OpenTelemetry, on-call
- UI systems (design tokens, Storybook) and performance profiling
Our stack
- Backend: Node.js, NestJS, REST/gRPC
- Data: Postgres/MySQL, Redis; ORM (MikroORM/TypeORM)
- Infra: Docker, CI/CD, AWS/GCP; monitoring with modern APM/logging tools
How we work
- Small, cross-functional squads with weekly planning and async docs
- Pragmatic testing, code reviews, and continuous delivery
- Autonomy with accountability - ship, measure, iterate
Benefits
- Possibility of additional benefits aligned with long-term company success
- Work with passionate people advancing sustainable, inclusive, livable cities
- Direct impact: your features improve daily commutes and help city planners decide better
- Culture of autonomy, feedback, and ownership - your ideas shape the roadmap
- Be part of the change: help drive the digital transformation of urban transport
- Personal learning budget and tickets to top mobility, urbanism, and open-data events
Apply now
If you feel this opportunity fits you, fill in the form below or send us your CV directly at jobs@tranzy.ai
Tranzy.ai provides an Open Digital Passenger Information Platform that enables passengers, cities, operators, and the business and academic communities to access reliable, real-time mobility data. Designed for openness and scalability, the platform fosters collaboration across transport systems while improving the travel experience.
Tranzy.ai is a Romanian smart mobility startup that connects all stakeholders to transform mobility data into action.
Our vision is to unify mobility systems and leverage the power of big data and AI to transform how cities move and evolve.
