REST API & Microservices Development
TICS designs and builds scalable REST APIs and microservices architectures that power modern applications, enable system integrations, and support distributed team ownership of business capabilities.
Overview
TICS delivers API and microservices development that provides the reliable, well-documented, and performant backend layer that modern web applications and system integrations depend on. The practice spans the full API development lifecycle: API contract design using OpenAPI Specification, implementation in Node.js with Express or Fastify, authentication and authorisation implementation using JWT and OAuth 2.0, comprehensive testing, and production deployment with monitoring.
For clients adopting microservices architecture, TICS brings disciplined service decomposition methodology informed by domain-driven design, identifying service boundaries along business capability lines rather than technical layers. Each service is independently deployable, has its own data store, and communicates through well-defined API contracts or asynchronous messaging. TICS also designs the supporting infrastructure these services require: API gateway configuration, service discovery, distributed tracing, and centralised logging.
GraphQL is a significant area of practice for TICS where use cases demand flexible, client-driven data fetching — particularly for front-end applications with diverse data requirements across different views and devices. TICS designs GraphQL schemas with careful attention to resolver performance using DataLoader for N+1 prevention, appropriate use of subscriptions for real-time data, and schema governance practices that enable teams to evolve the API without breaking existing clients.
Key Capabilities
REST API design with OpenAPI Specification, semantic versioning, and comprehensive documentation
Node.js API implementation with Express or Fastify, middleware pipelines, and structured error handling
OAuth 2.0 and JWT authentication implementation with refresh token rotation and scope-based authorisation
GraphQL API design with schema-first development, DataLoader batching, and subscription support
Microservices architecture design with service decomposition, API gateway configuration, and observability setup
Technology Stack
Use Cases
Real-world scenarios where this service delivers impact
Microservices Platform for a Retail Group
A retail group running a monolithic Node.js application that had become a deployment bottleneck across 12 development teams engaged TICS to lead a strategic decomposition into microservices. TICS conducted event storming workshops to identify bounded contexts, defined eight core microservices along business capability boundaries, designed the API gateway layer using Kong, and led the migration of the two highest-priority services as a proof of concept, enabling independent deployment across those capabilities within four months.
Partner Integration API Platform
A fintech company needed a governed API platform to expose its core payment and account management capabilities to 150 registered third-party partners. TICS designed and built a REST API layer with OpenAPI documentation, OAuth 2.0 client credentials flow, rate limiting per partner tier, webhook event delivery for asynchronous notifications, and a developer portal with sandbox environment, enabling partners to integrate and go live within days rather than weeks.
GraphQL API for a Media Streaming Application
A media company building a cross-platform streaming application required an API layer that could serve diverse data shapes to their iOS, Android, and web clients without over-fetching. TICS designed a GraphQL API backed by Node.js and a PostgreSQL data store, implementing DataLoader for efficient batch resolution, persisted queries for mobile performance, and a subscription layer for real-time watch progress synchronisation, reducing average API payload size by 55% compared to the previous REST implementation.
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