Senior Back-End Engineer (Node.js)
On-site · Bucharest, București, Romania
Job Summary
Senior Backend Engineer responsible for designing and building backend microservices for a unified enterprise platform. Responsibilities include integrating with external carrier/telecom APIs (Operator Connect, number/porting, ServiceNow, payment/billing systems), implementing event-driven flows and long-running workflows using Kafka and Temporal, developing automated tests, code reviews, and CI/CD practices, and collaborating with Business Analysts and Frontend Engineers to refine requirements and API contracts. Requires 5+ years of backend development with Node.js and TypeScript, strong microservices and API design skills (REST/GraphQL), PostgreSQL schema/data modeling, experience with external APIs, Kafka, Temporal, Docker, Kubernetes (EKS), AWS, and English at B2 level or higher. Nice-to-have items include AWS certifications, Node.js certifications, and telecom/VoIP experience.
Required Qualifications
- 5+ years of backend development experience with Node.js and TypeScript
- Strong background in microservices architecture and API design (REST and GraphQL)
- Solid experience with relational databases, including PostgreSQL and schema/data modeling
- Proven track record of integrating third-party and external APIs
- Hands-on experience with event-driven systems, including Kafka
- Experience with workflow orchestration tools such as Temporal.io
- Proficient in containerization and orchestration using Docker and Kubernetes (EKS)
- Practical experience working with AWS cloud services
- English proficiency at B2 level or higher
Apply with one swipe on Sorce. We auto-fill applications and apply on your behalf — no cover letters, no 40-minute forms.
Hiring someone like this?
Get your role in front of qualified candidates on Sorce.