Building secure, data-intensive .NET applications — from API architecture to production delivery.

I'm Kiramat Ullah, a backend-focused Full Stack .NET Engineer with 3+ years of professional experience. My work spans enterprise backend services, relational databases, React/Angular applications and WPF desktop integration.

Technical strengths • Backend architecture: C#, .NET 8/10, ASP.NET Core, REST APIs, microservices, Clean Architecture, EF Core and FluentValidation. • Data engineering: PostgreSQL, SQL Server and MySQL; schema design, indexing, query optimization, EF Core migrations, bulk ingestion and legacy-data migration. • Security: ASP.NET Core Identity, JWT/refresh tokens, OAuth, RBAC, PKI, Keycloak, rate limiting and application-level encryption. • Reliable processing: Hangfire, SignalR, asynchronous workflows, retries, timeouts, cancellation and recovery of failed or stuck jobs. • Frontend and desktop: React 19, TypeScript, Angular, TanStack Query, Ant Design, WPF and MVVM. • Production readiness: Docker, Serilog structured logging, correlation IDs, health checks and automated testing with xUnit, pytest, Vitest and Playwright.

A concrete example: SachAI I independently designed, built and launched an AI video authenticity platform with a .NET 10 API, React/TypeScript client and Python FastAPI inference service.

Its engineering includes Clean Architecture layers; Hangfire analysis jobs; FFmpeg frame extraction; AI scoring and PDF reports; retry/circuit-breaker and job-recovery workflows; Identity/JWT/OAuth security; indexed PostgreSQL data models; perceptual frame hashing; Cloudflare R2 storage and retention cleanup; subscription/trial workflows; Easypaisa integration; and an admin dashboard. The AI service uses PyTorch/Hugging Face models with a calibrated ensemble of video and frame detectors.

I also contribute to enterprise API, migration, database, security and WPF workflows within a company engineering team.

Available for remote freelance work: API development and integration, SQL performance improvements, secure authentication, background processing, WPF features and production debugging. Send me your requirements to discuss scope and delivery.

Portfolio: https://kiramat-ullah.vercel.app/ SachAI: https://sachaitech.com/ GitHub: https://github.com/KiramatUllah171