Middle Full-Stack Engineer (.NET)
Core
Build, maintain, and improve backend-focused payment systems supporting the full payment lifecycle, including integrations with payment processors and third-party systems.
Role type
Middle Full-Stack Engineer (backend-leaning)
Builds
Business-critical payment infrastructure and integrations for a global professional services network
Domain
Fintech / Payments
Deliverable
production ML models | product features
Required skills
C#, .NET frameworks, MS SQL, unit and integration testing, HTML5, CSS3, JavaScript, TypeScript, LLMs/Generative AI tools
Preferred skills
Web page performance optimization
Technologies
C#, .NET, MS SQL, Jest, NUnit, Playwright, React Testing Library, OpenAI, Copilot, Cursor
Responsibilities
Design and develop backend payment solutions; Integrate new payment processors and third-party systems; Contribute to payment flows (transactions, refunds, chargebacks); Support refactoring and improvement of payment infrastructure; Write and maintain automated tests; Work with complex SQL queries in high-load environments; Help keep systems secure and aligned with PCI compliance; Use AI-assisted development tools; Participate in code reviews
Seniority
Middle, hands-on IC
