.NET Backend Developer Junior (Internship)
Kolomolo.com
Office
Krak贸w, Poland
Internship
馃殌聽.NET Backedn Developer Junior
聽Location:聽Krak贸w, Poland- Hybrid
Join the Future of Digital Tech with Kolomolo
At Kolomolo, we don鈥檛 just follow trends -聽we set them. As a global supplier of IT services and digital modernization solutions, we help businesses embrace cutting-edge technology to optimize their operations. Now, we are growing and looking for fresh talent to grow with us.
Are you proactive, tech-savvy, and eager to build your career in IT? This role could be your perfect fit.
About the Role
You will be involved in the maintenance, enhancement, and further development of an IoT platform created in-house to support a wide range of sensors manufactured by our company. The platform serves both B2B and B2C customers, enabling them to manage users and devices, receive real-time alerts (push notifications, SMS), and integrate seamlessly with third-party systems.
As part of this role, you will work across the full lifecycle of IoT data - from device connectivity to backend processing and customer-facing services. You will gain hands-on experience with multiple networking protocols and communication technologies, and see how heterogeneous devices connect, authenticate, and interact with a scalable cloud-based system.
聽What You鈥檒l Be Doing
Maintain and extend backend services that power our IoT platform.
Design and implement new features related to device management, user management, alerts, and integrations.
Ensure reliability, performance, and scalability of existing systems.
Work with messaging and event-driven architectures for device communication and data processing.
Integrate devices using different communication protocols and connectivity types.
Collaborate with product, hardware, and DevOps teams to deliver end-to-end solutions.
Debug, monitor, and optimize production systems.
Contribute to code quality through reviews, testing, and documentation.
Technologies You鈥檒l Work With
Backend: .NET 6 & 8, Node.js 22+
Databases: PostgreSQL, InfluxDB
Messaging: Eclipse Mosquitto (MQTT), RabbitMQ
Protocols: HTTP, MQTT, AMQP, CoAP, TCP
Device Connectivity: WiFi, LoRa, Zigbee
DevOps & Tooling: Docker, GitLab CI
聽What We Are Looking For
Basic experience with .NET and/or Node.js (academic or commercial).
Understanding of programming fundamentals and REST APIs.
Familiarity with SQL and relational databases.
Basic knowledge of Git and version control workflows.
Willingness to learn new technologies and ask questions.
What you will learn
How IoT platforms are built and maintained end to end.
Basics of event-driven and message-based architectures.
Working with different networking and IoT protocols.
Handling and storing sensor data, including time-series data.
Writing clean, maintainable backend code in a production environment.
馃専 Why Join Kolomolo?
At Kolomolo, we prioritize innovation, agility, and autonomy. Our teams have the freedom to own their work, share ideas, and make meaningful contributions. Inspired by Scandinavian values, we believe in work-life harmony and creating an inclusive culture where everyone thrives.
You will be part of a passionate, skilled, and friendly team that works hard and celebrates together. Here, you can build your career on your own terms, with opportunities to grow, learn, and make a real impact.
Our Flat Structure & The Culture of Inclusion聽
At Kolomolo, we break the corporate mold. We offer:
Agile Teams & Autonomy: No micromanagement. You鈥檒l own your projects and enjoy the freedom to innovate.
Work-Life Harmony: Inspired by Scandinavian values, we prioritize balance and flexibility, where聽remote work and asynchronous collaboration are in our DNA.
Learning & Growth: Continuous learning is at our core. We reward hard work, value smart ideas, and foster an environment of mutual respect and trust.
Inclusive Culture: We believe in DEI: diversity, equity and inclusion.聽We are committed to creating an environment where every individual, regardless of background, identity, or experience feels valued, respected, and empowered to thrive.
Join Kolomolo and elevate your career with cutting-edge technology, a supportive team, and a company that truly values your input.
Ready for the next step? Apply now and start an exciting journey of growth and innovation with us!