Intermediate/Senior Full-Stack Developer

With over 2,500 employees the Hypoport group forms a network of tech companies for the credit, real estate, and insurance industry. As part of it, we enjoy the flexibility and independence of a mid-sized company with the opportunities and benefits provided by a German corporation.

FIO SYSTEMS AG has been part of the Hypoport Group since 2018 and specializes in providing web-based business software solutions. Its products cover all processes in the areas of real estate management and marketing, virtual banking, and claims management. FIO was established in 1999 in Leipzig and opened its office in Sofia in 2002. Today, FIO creates high-value products and values open-minded people with enthusiasm for innovation and high-quality solutions.

The role:

You’ll join one of our cross-functional teams in Sofia, responsible for a specific domain of our real estate platform used by banks and brokerage firms across Germany. Our stack includes C#/.NET and MS SQL Server on the backend, with React and TypeScript on the frontend. You’ll work on an established system that we continue to develop and modernize over time.

You’ll work on both the backend and frontend, with most of your focus on backend development.

Your responsibilities:

• Develop features end to end- from database and backend implementation to UI, deployment, and monitoring
• Take ownership of code in production, including troubleshooting and resolving issues that arise after release
• Modernize existing backend and frontend components while continuing to deliver new functionality
• Ensure code quality via tests and code reviews
• Help reduce technical debt via code refactoring and performance profiling
• Participate in an established agile development process (incl. refinement, estimation, and retrospectives)

What we’re looking for:

• 3+ years of web development experience with C#/.NET - OOP, ASP.NET, REST APIs
• Experience working with SQL and relational databases
• Experience with JavaScript/TypeScript and modern SPA frameworks
• Ability to implement Figma designs as responsive UIs using HTML and CSS
• Comfortable using AI tools effectively, without compromising the end results
• Analytical thinking and problem-solving skills
• Teamwork, good self-organization, and the drive to learn and improve
• Excellent written and spoken English

Nice to have:

• Experience React.
• Experience with CI/CD pipelines, Docker, Kubernetes, or message brokers