Junior Backend Developer (m/w/d)

freiheit.software

At freiheit.software, we are a dedicated team of software experts based in Potsdam and Berlin. Since 2017, we’ve been delivering high-quality software solutions to customers worldwide. Despite being a small team, we value transparency, open communication, and a hands‑on approach to modern development.

We specialise in scalable software for property management, while also offering expertise in web and mobile development, IT consulting, auditing, and DevOps.

Your role

As a backend developer, you will play a key role in building our new product in the property and estate management domain. The platform acts as a central integration hub, enabling property managers across Germany to manage hundreds of thousands of residential units while seamlessly connecting existing systems - and you will help shape it from the ground up. You’ll collaborate closely with designers, product managers, and fellow developers to build a high-quality, scalable product.

What you'll do

• Develop and maintain backend components of our web applications using C# and .Net
• Collaborate with frontend developers to integrate user-facing features with server-side logic
• Optimise applications for performance, scalability and security
• Write clean, maintainable, and well-documented code
• Debug, troubleshoot, and resolve application issues
• Participate in code reviews to maintain high-quality standards
• Work with product managers to define technical requirements and solutions
• Stay informed about industry best practices and emerging technologies
• Learn about the property management domain

What we’re looking for

• High enthusiasm for software development; building software is something you genuinely enjoy
• You are results-oriented, yet enjoy diving deep into topics to understand them at a fundamental level
• Hands‑on experience with .NET and C#
• Experience with object relational mappers (ORM), preferably Entity Framework Core
• Deep knowledge about RESTful API design regarding routes, HTTP verbs, status codes etc.
• Experience working with external API integrations and working with Swagger, Postman, OpenAPI
• Understanding of relational databases such as MySQL or PostgreSQL (NoSQL knowledge is a plus)
• Experience using version control systems like Git
• Familiarity with Agile development practices
• Excellent communication skills in English

• Familiarity with clean architecture design principles and domain driven design
• Experience using containerisation tools like Docker
• Experience with Opentelemetry and in general logging, metrics and tracing in .Net
• Foundational knowledge of CLI usage and scripting
• Basic familiarity with frontend technologies (HTML, CSS, JavaScript)
• Communication skills in German

Why join us?

• Impactful Work: Help build a real‑world product used daily by property managers at scale - octo will be the go‑to data‑backbone for property management companies
• Learning & Growth: You will receive guidance, mentoring, and opportunities to grow into a more advanced developer
• Flexible Setup: Remote‑friendly environment with flexible working hours
• Small, supportive team: A transparent, open culture where your ideas and contributions truly matter