ituma | Python Developer – Backend / API / Data / IoT (w/m/d)

Why ituma?

Are you a Python developer with a passion for clean back-end systems, data-driven solutions and IoT infrastructure – and looking for a product that really makes a difference in the real world? With us, you’ll integrate data streams from physical sensor networks with scalable back-end architectures and have a direct influence on our core product, aduno®.

As a successful and financially independent IT company based in Hilden near Düsseldorf, we have been defining intelligent enterprise network solutions as one of the market leaders in Europe since 2010. Our team consists of experts with diverse specialist knowledge from a wide range of industries.

Python Developer (Mid- bis Senior) – Backend / API / Data / IoT (w/m/d)

Full-time / permanent / location: Hilden

What you can expect

Real IoT data. Real responsibility.

You’ll join aduno®’s core development team and work at the interface between physical infrastructure and scalable software. From LoRaWAN sensor data and MQTT pipelines to high-performance REST APIs – you’ll bring the data to life.

Your mission

Backend development: You will design and implement scalable APIs and microservices using FastAPI – from data integration to secure endpoints
IoT data pipelines: Integration and processing of sensor data from LoRaWAN networks via MQTT and ChirpStack – you will ensure that no data point is lost
Database architecture: Design and optimisation of TimescaleDB schemas for time-series data; high-performance queries for large data volumes are your speciality
API security: Implementation of JWT-based authentication, refresh token strategies and modern authentication flows (including Redis session management)
DevOps integration: Containerisation with Docker, helping to design CI/CD pipelines and deployment processes
Quality assurance: Developing and maintaining a testing strategy using pytest, mypy and static code analysis tools (ruff, bandit) to ensure sustainable, secure code

What you bring to the table

Must-haves

Python proficiency: Several years’ practical experience with Python 3.10+ and knowledge of object-oriented and functional programming
FastAPI / REST: Extensive experience in the development and design of RESTful APIs using FastAPI or a comparable framework (Flask, Django REST)
Databases: Proficiency in PostgreSQL or TimescaleDB; Understanding of time series data and query optimisation
Messaging / IoT: Knowledge of MQTT protocols and experience with processing real-time data streams
Docker: Proficiency in using containers for local development and deployment
Testing mindset: Practical experience with pytest and writing unit and integration tests

Nice-to-haves

Experience with ChirpStack or other LoRaWAN network servers
Knowledge of Redis (session management, caching)
Familiarity with modern authentication standards (JWT, OAuth 2.0, DPoP / RFC 9449)
Understanding of clean architecture and scalable system designs
Interest in network monitoring and carrier-grade infrastructures

Your personality

Personal responsibility: You take ownership of your components and proactively drive projects forward
Strong communication skills: You can clearly communicate technical matters – both within the team and to stakeholders
Commitment to quality: Clean code, sustainable solutions and meaningful tests are second nature to you
Pragmatism: You strike the right balance between perfection and time-to-market
Team player: You enjoy sharing your knowledge, giving constructive feedback and working collaboratively to find the best solution
Willingness to learn: You see IoT, network technologies and new Python patterns as exciting areas, not as obstacles

What we offer you

Technology & Project

Real impact: Your code runs on live networks – from corporate Wi-Fi and LoRaWAN sensor infrastructure to public transport systems
Modern tech stack: Python 3.12+, FastAPI, TimescaleDB, ChirpStack, Docker, GitLab CI – no legacy baggage
Shaping the future: Your expertise matters – you have a real say in architectural decisions and the technical development of aduno®
High-end equipment: Operating system of your choice – you decide what you work best with

Benefits

Family-like corporate culture with flat hierarchies and short decision-making processes
Attractive remuneration package based on your expertise and the added value you bring
Flexible working hours and the option to work from home (hybrid)
Work-life balance that deserves its name
Training budget for conferences, training courses and certifications
No dress code – come as you are
Free drinks and regular team events
Sport & leisure: Sportpark Hilden and HiFly Trampoline Park nearby
Transport links: Direct bus stop and large staff car park
JobTicket for local public transport
Team spirit: A team that sticks together and supports each other

Interested?

Do you want to build backend systems that really make a difference – and are you passionate about Python, clean architectures and IoT data? Then let’s talk!

Apply now, sending us your CV and cover letter, your salary expectations and your earliest possible start date: hr@ituma.eu.

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