Lead Backend Engineer (Node.js/Golang/AWS) with German
Node.js
Python (ETL-related components)
Redis (Key-Value stores)
gRPC & REST APIs
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
Salary 150 - 220 PLN hourly
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Lead Backend Engineer (Node.js/Golang/AWS) with German in Katowice – pracodawca: Unravel
Nasza firma to doskonały pracodawca, który stawia na rozwój swoich pracowników i wspiera ich w osiąganiu sukcesów w dynamicznym środowisku Agile. Oferujemy elastyczne godziny pracy, możliwość pracy zdalnej oraz dostęp do szkoleń, co sprzyja ciągłemu rozwojowi zawodowemu. Pracując u nas, będziesz częścią zgranej ekipy, która ceni sobie współpracę i innowacyjność, a także ma realny wpływ na kształtowanie produktów w obszarze technologii klimatycznych i energetycznych.
