Senior Full-stack Engineer .NET + Typescript

YOUR NEW ROLE CODE LEAP
CODE LEAP is seeking ​an experienced Backend Engineer (.NET + Azure) who will ​help strengthen our backend development. The ideal engineer will bring their experiences, best practices, and a collaborative attitude to ​help drive agile culture initiatives. To be successful, one ​should effectively communicate with our development and operations team to orchestrate the creation or improvement of solutions that can scale. ​Our team aims for the sustainability!

YOUR EXCITING TASKS

• You design and build the services behind our reconciliation engine - ingesting and normalising settlement files from banks and payment providers and matching them against our transaction data
• You own correctness: idempotent processing, traceable matches, and safe reprocessing of historical data
• You integrate new banks and payment providers and keep those integrations maintainable
• You build and maintain back-end services in [protected info] and TypeScript with Effect, modelling failures as typed errors and composing services through layers, so that integrations and jobs stay testable and safe to retry
• You build the interface Finance works in all day - reviewing unmatched transactions, investigating discrepancies and resolving them - and make a data-heavy domain usable: large tables, search and filtering at high volume, drill-downs from summary to single transaction
• You build the review and resolution workflows - assigning cases, manual matches, comments and audit trails - and make uploads, imports and long-running jobs predictable, with clear progress and error reporting
• You own features end to end, from API contract to screen, and shape requirements with Product and Finance into software they can work with
• You make the architectural decisions for a greenfield system - backend modules and data model, frontend structure, state management and data fetching - and keep it observable, performant, accessible and well tested
• You review code and help set the engineering standard for a new team

YOUR PROFILE AND YOUR PERSONALITY

• Several years of professional experience building production software across the full stack. You may be stronger on one side, but you are productive on both.
• Backend development with C# and .NET: modular monoliths, bounded contexts, CQRS and the REPR / vertical-slice style, modern API frameworks (e.g. FastEndpoints, Minimal APIs) and document databases (e.g. Azure Cosmos DB)
• Professional [protected info] and TypeScript experience on the server side, with hands-on production use of Effect (Effect-TS): typed errors, services and layers, resource-safe and concurrent code, retries and schedules. Strong React and TypeScript with modern build tools (Vite, turborepo)
• Design systems and component-based development (Storybook, TailwindCSS)
• State and data fetching with Jotai, TanStack Query and TanStack Router
• Performance optimization and accessibility in data-heavy web applications
• Solid testing practice: unit and integration tests in .NET, Jest and Playwright on the front-end
• Git and collaborative workflows: pull requests and code reviews
• Clear written and spoken English for working with colleagues in Germany

Nice To Have

• Experience with CI/CD pipelines (GitHub Actions) and basic knowledge of Kubernetes and Helm
• Experience with Banking/Financial solution

BENEFITS AWAIT YOU AT CODE LEAP

• Competitive salary and benefits
• Year-end bonus (13th-month salary)
• Generous annual leave of up to 18 days
• Additional premium health insurance
• Enjoy an endless selection of delicious refreshments, including gourmet coffee, beverages, snacks, and fresh fruits, all complimentary
• 1-on-1 coaching with experienced professionals
• Flexible work policy, which provides flexible hours to accommodate personal schedules and commitments
• Dynamic, fun, and agile environment, perfect for sharing and creativity
• Open-minded, kind & humble colleagues