About the role
Job Description
Project – the aim you’ll have
Join a next-generation risk analysis and scoring platform built for a payments technology company. The platform combines the client’s own risk rules with AI-driven, pre-scored risk feeds from a global card network over high-volume payment data under PCI DSS. You’ll own the C#/.NET services and API contracts the analyst-facing apps run on, in a small AI-first delivery team alongside a frontend-leaning developer.
Role – how you’ll contribute
* Design, build and ship production C#/.NET services and REST APIs serving high-volume payment and risk data under PCI DSS constraints * Own API contracts with the front end: typed OpenAPI contracts, versioning and backward-compatible change * Write efficient data access against the operational database and Microsoft Fabric Gold-layer risk tables at analyst-scale volumes * Implement security-critical concerns: authentication, authorization, audit logging and PCI-safe handling of tokenized card data * Contribute to the React and TypeScript front end – building features end to end, reviewing and pairing * Use Claude Code or an equivalent agentic coding tool as your primary accelerator, backed by unit, integration and contract tests, while owning the quality of every line merged * Maintain Dockerfiles and Compose configurations, support deployments to AKS and contribute to Azure DevOps CI/CD * Implement against the target architecture set by the client’s architecture group, raise risks early and hand off work the internal team can own
Qualifications
Expectations – the experience you need
* 7+ years of commercial software development, including 5+ years of production-grade C#/.NET (ASP.NET Core, async, DI, EF Core or Dapper) * Strong API design: REST conventions, OpenAPI contracts, versioning and evolving APIs without breaking consumers * Relational database and distributed-systems skills: schema design, query tuning, transactional correctness, idempotency, failure handling * Working proficiency in React and TypeScript – able to build features end to end and review frontend code * Daily, hands-on use of agentic AI coding tools (Claude Code, Cursor, Copilot Workspace, Codex or similar) and a track record of shipping AI-accelerated code that holds up in production – you’ll demo your workflow live * Containers: Docker (multi-stage builds, hardening), Docker Compose and Kubernetes (AKS preferred) * Testing discipline: xUnit or NUnit, integration testing with real dependencies (e.g. Testcontainers) and contract testing * Git, CI/CD (Azure DevOps, GitHub Actions or similar) and autonomy in an existing codebase
Additional skills – the edge you have
* Payments, card processing, risk/fraud or merchant services experience, ideally with PCI-scoped systems * Microsoft Fabric, Delta Lake or building APIs over analytical data stores * Messaging and observability: Azure Service Bus, Event Hubs or Kafka; OpenTelemetry and Application Insights * Identity standards: OAuth2/OIDC, Microsoft Entra ID, managed identity * Python and exposure to LLM-integrated or agentic applications (e.g. LangGraph); prior consulting experience
Additional Information
What we offer:
* Flexible and remote cooperation options * International projects with leading global clients * Travels related to international projects * Non-corporate atmosphere * Access* to language classes * Access* to knowledge-sharing initiatives * Access* to private healthcare and life insurance * Access* to multisport card
*The availability and terms of individual benefits may vary depending on the chosen form of cooperation.