Lead Backend Engineer (Node.js/Golang/AWS)

Quick Facts

• Focus: Backend and microservices for a digital twin platform supporting the energy transition

• Primary stack: Node.js, with microservices in Golang and Python

• Cloud & infrastructure: AWS, Docker, Kubernetes

• Messaging: RabbitMQ / AWS SQS

Description

You will join the development of an advanced digital twin platform for the energy transition, unifying energy and climate-related data into a single solution. The platform provides data-driven insights and decision-making tools for CO₂ balancing, renewable energy expansion, power grid planning, and municipal heating strategies. Built on a modular and scalable architecture, it supports complex analytics and real-time insights in a rapidly evolving energy sector.

Responsibilities

• Design, develop, and maintain scalable backend services using 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

• Lead a development team of up to 10 members

• 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

• 5+ years of professional backend development experience at a Senior Software Engineer level

• Strong commercial experience with Node.js

• Fluent German (C1/C2), able to communicate confidently with business stakeholders and clients (mandatory)

• Very good command of English

• Experience working directly with clients, including requirements gathering, solution discussions, and ongoing collaboration

• Experience designing and developing scalable backend services and microservices

• 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

Benefits

• Work on a modular, scalable digital twin platform for the energy transition

• Lead a backend team of up to 10 members and shape distributed systems architecture

• Develop in a modern cloud-native environment using AWS, Kubernetes, and event-driven messaging