Backend API & System Architecture
Robust, secure REST APIs and backend systems designed for scale — whether you need a clean microservice, a CQRS-based enterprise backend, or a well-structured monolith with room to grow.
APIs That Last
The difference between a backend that works and one that scales is architecture. I design and build backend systems with the long term in mind — clean separation of concerns, proper error handling, and security built in from the start.
What I Deliver
- REST API design — clear contracts, proper status codes, versioning
- Authentication & authorisation — JWT, refresh tokens, RBAC
- CQRS architecture — for complex domains and high-throughput systems
- Data validation & sanitisation — at every layer
- Database design — normalised schemas, migrations, performance indexing
Technology
- NestJS — enterprise-grade Node.js framework with dependency injection
- .NET — for high-performance, strongly-typed enterprise backends
- Prisma ORM + PostgreSQL — type-safe queries, clean migrations
- Azure DevOps — CI/CD pipelines for automated testing and deployment
Security
Input validation, parameterised queries, rate limiting, CORS configuration, and secure credential management — your API won't become a liability.
Ideal For
- Startups that need a solid API backbone
- Teams replacing a fragile legacy backend
- Businesses adding a backend to an existing frontend
Common questions
Related work
- Product Builder PortfolioThis portfolio site — a full-stack CMS-powered portfolio with Next.js, NestJS, PostgreSQL, Cloudinary, and Resend. Production-grade architecture demonstrating what I build for clients.
- CRM System — Role-Based Customer ManagementEnterprise CRM with three distinct portals — Admin, Employee, and Client — built with TypeScript, role-based access control, and scalable architecture for streamlined customer relationship management.
- Sharetable — Food Distribution PlatformA socially responsible platform connecting food donors with public food hubs — optimising resource allocation, reducing waste, and ensuring food reaches communities that need it most.