Lead Fullstack Engineer (Typescript/Node.js) with German

Unravel S.A; Wrocław; Hybrid; PLN 207.000 - 262.000; Vollzeit

Zusammenfassung

Unravel S.A. seeks a Lead Fullstack Engineer (TypeScript/Node.js) with German to build a digital twin platform for the energy transition.

You’ll design scalable backend services, collaborate with German-speaking clients, and drive API development using gRPC and REST while deploying on AWS with Docker and Kubernetes. You will lead cross-functional teams, contribute to microservices in Golang and Python, and shape data models in PostgreSQL, ensuring high performance and reliable delivery in a

Qualifikationen

• 5+ years of experience in backend development.
• Strong commercial experience with TypeScript and Node.js (key requirement).
• Experience designing and developing scalable backend services and microservices.
• Fluent German (C1/C2) – mandatory, with the ability to communicate confidently with business stakeholders and clients.
• Experience working directly with clients, including requirements gathering, solution discussions, and ongoing collaboration.
• 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.
• Very good command of English.

Aufgaben

• Design, develop, and maintain scalable backend services using TypeScript/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.
• 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.

Kenntnisse

TypeScript

Node.js

Python

Redis

gRPC

REST APIs

AWS

RabbitMQ

AWS SQS

NestJS

PostgreSQL

Docker

Kubernetes

Angular

Svelte

Tools

Docker

Kubernetes

PostgreSQL

NestJS

Angular

Svelte

Jobbeschreibung

Lead Fullstack Engineer (Typescript/Node.js) with German

TypeScript & Node.js (core technologies)

Python (ETL-related components)

Redis (Key-Value stores)

gRPC & REST APIs

AWS (cloud infrastructure)

RabbitMQ / AWS SQS (event-driven architecture)

NestJS

Requirements

5+ years of experience in backend development

Strong commercial experience with TypeScript and Node.js (key requirement)

Experience designing and developing scalable backend services and microservices

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

Experience working directly with clients, including requirements gathering, solution discussions, and ongoing collaboration

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

Very good command of English

Nice to have

Experience with Golang

Experience with Python (especially in ETL processes)

Familiarity with NestJS framework

Knowledge of event-driven architectures (RabbitMQ, AWS SQS)

Exposure to Angular or Svelte frontend technologies

Knowledge of the energy or electric energy industry domain

Experience working within highly agile environments

Experience using AI tools in day-to-day work

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.

Main responsibilities

Design, develop, and maintain scalable backend services using TypeScript/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

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 - 190 PLN hourly