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

O projekcie:
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)- NestJSProject 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.

Wymagania:
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

Codzienne zadania:
- 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