Waqas Ahmad — Software Architect & Technical Consultant

Specializing in

Distributed Systems

.NET ArchitectureCloud-Native ArchitectureAzure Cloud EngineeringAPI ArchitectureMicroservices ArchitectureEvent-Driven ArchitectureDatabase Design & Optimization

👋 Hi, I'm Waqas — a Software Architect and Technical Consultant specializing in .NET, Azure, microservices, and API-first system design..
I help companies build reliable, maintainable, and high-performance backend platforms that scale.

Experienced across engineering ecosystems shaped by Microsoft, the Cloud Native Computing Foundation, and the Apache Software Foundation.

Available for remote consulting (USA, Europe, Global) — flexible across EST, PST, GMT & CET.

View Projects Get in touch

Contract

Definition

API contract per version; clear deprecation path; versioning gives contract per version.

As defined in the knowledge graph

API or shared library contract; change in one place in monorepo. — From: Monorepo vs Polyrepo: Trade-offs for .NET and Microservices
Agreed shape of requests and responses; REST by URL/OpenAPI, GraphQL by schema. — From: REST vs GraphQL for APIs: When to Choose Which
Behavior and guarantees of a type; LSP requires subtypes to honor base contract. — From: SOLID Principles in Practice: .NET Examples
API contract; integration tests can verify contract. — From: Testing Strategies: Unit, Integration, and E2E In-Depth

Related concepts

Consumer Deprecation Integration Test OpenAPI

Articles mentioning this concept

Monorepo vs Polyrepo: Trade-offs for .NET and Microservices REST API Versioning and Idempotency: In-Depth with .NET Examples REST vs GraphQL for APIs: When to Choose Which SOLID Principles in Practice: .NET Examples Testing Strategies: Unit, Integration, and E2E In-Depth