Senior Software Developer, C#/.NET – Billing System
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Job Description
Senior Software Developer C#/.NET for billing systems in a remote position. Contributing to a stable backend and modernizing existing codebases at FIO software company.
Responsibilities:
- Develop and take ownership of a central billing system (C# / .NET, backend)
- Work within an established .NET system landscape
- Take responsibility for evolving a long-standing codebase
- Analyze complex business and technical contexts and make well-founded technical decisions
- Perform deployments and monitor production operations
- Drive topics through to robust, practical solutions
- Identify technical debt early and advance modernization pragmatically and effectively
- Communicate technical matters clearly and provide direction
Requirements:
- Many years of experience as a software developer with C# and .NET
- Comfortable working in large, existing backend systems
- Object-oriented software development, ASP.NET, Entity Framework, REST APIs and relational databases
- Willingness to work predominantly in mature .NET codebases
- Commitment to Clean Code, maintainable architectures and automated tests
- Strong communication skills and the ability to assert technical positions with confidence
- Experience with message brokers, CI/CD, Docker or AI-assisted development tools is a plus
- Experience in product-facing environments such as FinTech, platforms or SaaS
Benefits:
- Company pension plan
- 30 days of annual leave per year (based on a five-day week)
- Attractive workplace with regular after-work and team events
- Option to bring dogs to the office
- Free fresh daily lunch, drinks, brainfood and fruit & vegetables
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