Lead Fullstack Engineer (Typescript/Node.js) with German

Project description
You will join the development of an advanced digital twin platform for the energy transition, designed to unify energy and climate-related data into a single, comprehensive solution.
The platform supports stakeholders involved in energy transformation by providing data-driven insights and decision-making tools. It addresses key challenges such as CO₂ balancing, renewable energy expansion, power grid planning, and municipal heating strategies.
Built on a modular and scalable architecture, the solution enables complex analytics and supports real-time insights in a rapidly evolving energy sector.
Tech stack
TypeScript & Node.js (core technologies)
Golang (microservices, gRPC-based services)
Python (ETL-related components)
PostgreSQL
Redis (Key-Value stores)
gRPC & REST APIs
Docker & Kubernetes
AWS (cloud infrastructure)
RabbitMQ / AWS SQS (event-driven architecture)
NestJS
Angular / Svelte (collaboration exposure)
Requirements
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
Nice to have
Experience with Golang
Experience with Python (especially in ETL processes)
Familiarity with NestJS framework
Knowledge of event-driven architectures (RabbitMQ, AWS SQS)
Exposure to Angular or Svelte frontend technologies
Knowledge of the energy or electric energy industry domain
Experience working within highly agile environments
Experience using AI tools in day-to-day work
Main 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

Work arrangement
Yes