Senior .NET/React Developer

Starapple Senior .NET/React developer Leiden Organisatie & Afdeling This innovative fintech company develops advanced investment solutions within the digital assets market. Using its proprietary platform, it automates complex trading processes and analyzes large volumes of data to support intelligent investment strategies. All software is developed entirely in-house, making technology a core part of the business. The company is currently in an exciting scale-up phase and has a team of approximately 15 employees. The IT department consists of a compact Scrum team responsible for the entire technical landscape. Team members are encouraged to take ownership, contribute ideas, and influence technical decisions. Developers work closely with colleagues from both the trading and business teams, allowing ideas to be translated into practical solutions quickly. The company culture is informal, ambitious, and results-driven. Employees work primarily from the office (four days per week), fostering close collaboration. The team enjoys lunch together every day, and regular social events and team activities are organized. Functie As a Senior Full-Stack Developer, you will play a key role in developing a modern software platform within an innovative fintech environment. You will be responsible for designing, building, and optimizing business-critical applications while helping shape the platform's technical direction. The primary focus is on back-end development within the Microsoft Azure ecosystem, using .NET, C#, and API integrations. You'll also have the opportunity to contribute to the front-end, working with React and TypeScript. Because of the company's small and agile structure, you'll have significant responsibility and be involved throughout the entire software development lifecycle-from architecture and implementation to deployment and maintenance. You'll share your expertise with colleagues, conduct code reviews, and help m...