Tech Stack:
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Node.js
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Golang (microservices, gRPC-based services)
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Python (ETL-related components)
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PostgreSQL
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Redis (Key-Value stores)
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gRPC & REST APIs
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Docker & Kubernetes
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AWS (cloud infrastructure)
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RabbitMQ / AWS SQS (event-driven architecture)
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NestJS
Required Qualifications:
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5+ years of professional experience in backend development at a Senior Software Engineer level
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Strong commercial experience with Node.js
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Fluent German (C1/C2) – mandatory, with the ability to communicate confidently with business stakeholders and clients
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Very good command of English
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Experience working directly with clients, including requirements gathering, solution discussions, and ongoing collaboration
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Experience designing and developing scalable backend services and microservices
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Experience with AWS services and cloud-based environments
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Solid knowledge of PostgreSQL and database design for scalable, high-performance systems
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Good understanding of Docker and Kubernetes
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Experience designing and developing REST and/or gRPC APIs
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Ability to work independently, take ownership, and drive solutions from concept to delivery
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Strong communication and problem-solving skills
Nice to Have:
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Experience with frontend technologies such as Angular, Svelte, and TypeScript is a plus
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Experienced in using AI tools in day-to-day workflow
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Knowledge of the energy or electric energy industry domain
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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:
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Design, develop, and maintain scalable backend services using Node.js as the primary technology stack
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Contribute to the development of microservices built with Golang and Python
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Collaborate directly with German-speaking clients and stakeholders to understand requirements and propose technical solutions
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Leading a development team of up to 10 members
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Build and optimize PostgreSQL data models and queries
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Develop and maintain APIs using gRPC and REST
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Containerize applications with Docker and manage deployments on Kubernetes (AWS)
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Contribute to architecture decisions for distributed systems
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Ensure system scalability, performance, and reliability
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Collaborate with frontend (Angular) and backend (NestJS) teams
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Work independently from concept to production delivery
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Participate in agile ceremonies, code reviews, and continuous improvement initiatives
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