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

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

Daily tasks

• 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

Requirements

Must have: Node.js, TypeScript, AWS, PostgreSQL, Docker, Kubernetes, REST

Nice to have: Golang, NestJS, Angular, Svelte