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

Tech Stack:

• Node.js

• 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

Required Qualifications:

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

• Strong commercial experience with Node.js

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

• 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

Nice to Have:

• Experience with frontend technologies such as Angular, Svelte, and TypeScript is a plus

• Experienced in using AI tools in day-to-day workflow

• Knowledge of the energy or electric energy industry domain

• Experience working within highly agile environments

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.

Scope of Services:

• 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

• Leading 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