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

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 

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

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.

,[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] Requirements: Node.js, AWS, Requirements gathering, Microservices, PostgreSQL, Docker, Kubernetes, REST API, gRPC, Angular, Svelte, TypeScript, AI, Agile