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- Vollzeit
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Senior Software Engineer (Backend) (m/w/d)

Lumenaza GmbH
Berlin-Kreuzberg

Direkt bewerben

Details zur Stelle

Vollzeit

Leistungen

Flexible Arbeitszeiten
Kostenfreies oder vergünstigtes Deutschland-Ticket

Qualifikationen

Microservices
Verteilte Systeme
Systems Engineering
Kommunikationsfähigkeit

Vollständige Stellenbeschreibung

This is us

Lumenaza is a green-tech company building software for the decentralized energy world. Our platform enables energy providers to manage billing, market communication, and energy data — supporting renewable energy business models at scale.

We are driven by a clear mission: accelerating the transition to a sustainable energy system. At the same time, we value diversity, collaboration, and continuous learning.

Your tasks

Your Role

As a Senior Backend Engineer, you will design and build core systems that power real-world energy processes — from billing to market communication.

You take ownership of complex domains, contribute to architectural decisions, and help evolve both our systems and engineering practices.

What You’ll Do

Build and own core backend systems
Design and implement scalable solutions for billing, tariff models, and energy market processes.
Shape system architecture
Work across the full lifecycle — from design to deployment — ensuring maintainability, scalability, and correctness.
Solve complex technical challenges
Develop robust solutions involving data modeling, asynchronous processing, and distributed systems.
Collaborate across disciplines
Work closely with Product, Frontend, and DevOps to deliver cloud-based solutions and improve our platform.
Drive improvement and innovation
Bring in new ideas, improve engineering practices, and explore modern development approaches, including AI-assisted workflows.
Modernize existing systems
Help evolve and migrate legacy systems toward modern architectures.

Your profile

Core Requirements

5+ years of backend development experience
Strong Python and Django expertise
Experience designing and building REST APIs
Experience with distributed systems / microservices
Solid understanding of databases (PostgreSQL)
Experience with Docker and CI/CD workflows
Strong communication skills in English

Nice to Have

Experience with FastAPI, Pydantic, or Django Ninja
Knowledge of Celery or similar async tools
Experience integrating external systems (e.g. ERP, APIs)
Familiarity with React / TypeScript
Interest in energy markets or regulated domains

Our Tech Stack

Python, Django, Django REST Framework
PostgreSQL, Redis
Celery (async processing)
Docker, Kubernetes
GitLab CI/CD
Robot Framework (testing)
React (frontend)

We deploy continuously to Kubernetes and work with distributed systems handling complex, business-critical data.

We offer you this

Impact: Build software that directly enables renewable energy business models
Ownership: Work on complex, meaningful systems with real-world impact
Growth: Structured onboarding and continuous learning
Flexibility: Flexible hours and hybrid work setup
Benefits: Competitive compensation, Deutschlandticket
Location: Modern office in Berlin Kreuzberg

We strongly encourage applications from underrepresented groups in tech and are committed to building an inclusive environment.

About us

Lumenaza GmbH, through its brand Lumenaza.Community, is a leading provider of direct marketing for small-scale installations and a supplier of electricity for household tariffs ranging from fixed to dynamic contracts. The Lumenaza Community represents green, decentralized electricity generation.

Since 2013, Lumenaza GmbH has also been supporting major energy supply companies such as EnBW and E.ON as a software and service provider, offering innovative solutions in billing, market communication, and virtual power plants.

For more information, visit Lumenaza.Community and www.lumenaza.com.

Direkt bewerben

Erweiterte Suche

senior software engineer (m w d) Jobs in holländer

Senior Software Engineer (Backend) (m/w/d)

(Senior) Robotics Engineer, Body (m/w/d) - Gigafactory Berlin-Brandenburg

Senior Safety & Regulatory Engineer (Functional Safety / CE / Machinery) (m/w/d) - Gigafactory Berlin Brandenburg

Senior Applied Scientist, Amazon Robotics

Senior Kernel/Hypervisor Engineer, EC2 Core Compute

Senior Backend Engineer (m|w|d) - Java/Kotlin, AWS & CRM Tech

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