Lead Fullstack Engineer (TS/Node.js) – German-speaking

Unravel S.A; Wrocław; Hybrid; PLN 207,000 - 262,000; Full time

Job summary

Unravel S.A. seeks a Lead Fullstack Engineer (TypeScript/Node.js) with German to build a digital twin platform for the energy transition.

You’ll design scalable backend services, collaborate with German-speaking clients, and drive API development using gRPC and REST while deploying on AWS with Docker and Kubernetes. You will lead cross-functional teams, contribute to microservices in Golang and Python, and shape data models in PostgreSQL, ensuring high performance and reliable delivery in a

Qualifications

• 5+ years of experience in backend development.
• Strong commercial experience with TypeScript and Node.js (key requirement).
• Experience designing and developing scalable backend services and microservices.
• Fluent German (C1/C2) – mandatory, with the ability to communicate confidently with business stakeholders and clients.
• Experience working directly with clients, including requirements gathering, solution discussions, and ongoing collaboration.
• Experience with AWS services and cloud-based environments.
• Solid knowledge of PostgreSQL and database design for scalable, high-performance systems.
• Good understanding of Docker and Kubernetes.
• Experience designing and developing REST and/or gRPC APIs.
• Ability to work independently, take ownership, and drive solutions from concept to delivery.
• Strong communication and problem-solving skills.
• Very good command of English.

Responsibilities

• Design, develop, and maintain scalable backend services using TypeScript/Node.js as the primary technology stack.
• Contribute to the development of microservices built with Golang and Python.
• Collaborate directly with German-speaking clients and stakeholders to understand requirements and propose technical solutions.
• Build and optimize PostgreSQL data models and queries.
• Develop and maintain APIs using gRPC and REST.
• Containerize applications with Docker and manage deployments on Kubernetes (AWS).
• Contribute to architecture decisions for distributed systems.
• Ensure system scalability, performance, and reliability.
• Collaborate with frontend (Angular) and backend (NestJS) teams.
• Work independently from concept to production delivery.
• Participate in agile ceremonies, code reviews, and continuous improvement initiatives.

Skills

TypeScript

Node.js

Python

Redis

gRPC

REST APIs

AWS

RabbitMQ

AWS SQS

NestJS

PostgreSQL

Docker

Kubernetes

Angular

Svelte

Tools

Docker

Kubernetes

PostgreSQL

NestJS

Angular

Svelte

Job description

Unravel S.A. seeks a Lead Fullstack Engineer (TypeScript/Node.js) with German to build a digital twin platform for the energy transition.

You’ll design scalable backend services, collaborate with German-speaking clients, and drive API development using gRPC and REST while deploying on AWS with Docker and Kubernetes. You will lead cross-functional teams, contribute to microservices in Golang and Python, and shape data models in PostgreSQL, ensuring high performance and reliable delivery in a