API Development & Integration
REST, GraphQL, gRPC — built in PHP, Go, Spring Boot, Node.js, or Quarkus. Custom API gateways, OAuth2 auth servers, LLM integration APIs, and third-party integrations. Contract-first, fully documented, production-tested.
Secure integration gateway
Contracts · identity · routing · observability
Contract first
OpenAPI documented
OAuth 2.0
Secure by design
Real time
Webhooks & events
Every API type, every technology stack
Spring Boot APIs
Enterprise-grade REST and reactive APIs using Spring Boot 3 with Java 21. We build structured multi-module projects with Spring Security, JPA repositories, Flyway migrations, and OpenAPI 3 documentation via SpringDoc. Deployed to AWS ECS or Kubernetes.
Spring WebFlux (Web Reactive)
Non-blocking reactive APIs using Spring WebFlux and Project Reactor — ideal for streaming data, high-concurrency microservices, and WebSocket-heavy backends that need to handle thousands of concurrent connections on minimal infrastructure.
Go (Golang) APIs
Blazing-fast microservices in Go using Gin or Fiber for HTTP APIs and gRPC for internal service-to-service communication. Go's compile-time safety and low memory footprint make it ideal for high-throughput payment processors and real-time APIs.
Quarkus APIs
Cloud-native Java APIs with Quarkus — compiling to native executables with GraalVM for sub-100ms startup times and minimal memory footprint. Perfect for serverless deployments and microservices with tight cold-start requirements.
Node.js APIs
High-performance Node.js APIs using Fastify (2× faster than Express) with TypeScript, Prisma ORM, and tRPC for end-to-end type safety between a Next.js frontend and Node backend. Ideal for real-time apps with WebSocket or SSE requirements.
PHP APIs (Laravel & Slim)
Laravel REST and GraphQL (Lighthouse) APIs — our most common stack for Pakistani market applications. Also Slim 4 for lightweight microservices where the full Laravel framework would be overkill. OpenAPI 3.1 spec generated from code annotations.
GraphQL APIs
Schema-first GraphQL APIs with Apollo Server (Node.js) or Lighthouse (Laravel). DataLoader patterns prevent N+1 query problems. Depth limiting, query complexity scoring, and persisted queries protect against abusive clients.
gRPC & Protobuf APIs
Binary-protocol gRPC APIs for internal microservice communication — 5–10× smaller payloads than JSON REST and strongly-typed contracts enforced by Protobuf schemas. Used for high-frequency inter-service calls in distributed systems.
WebSocket & Streaming APIs
Real-time bidirectional communication for chat, live dashboards, collaborative tools, and notification systems. Server-Sent Events for one-way streaming (AI output, live feeds). Laravel Echo + Pusher or Soketi for event broadcasting.
Custom API Gateway
A custom API gateway sits in front of all your backend services and handles the cross-cutting concerns that every API needs but none should implement individually: authentication, rate limiting, request routing, payload transformation, logging, and analytics. Instead of duplicating this logic across 10 microservices, you implement it once in the gateway.
We build custom gateways using Go (for maximum throughput) or Laravel (for rapid development) depending on your scale requirements. The gateway proxies to downstream services, validates JWTs or API keys, enforces per-consumer rate limits, transforms request and response payloads when needed, and emits structured logs to your observability stack. An admin dashboard shows per-consumer usage, error rates, and latency percentiles in real time.
OAuth2, JWT & API Security
API security is not a bolt-on. We implement the correct authentication mechanism for your use case from day one — and choose it deliberately, not by default.
OAuth2 Authorization Server
Full OAuth2 server (Authorization Code, Client Credentials, PKCE) using Laravel Passport or Spring Authorization Server — with scopes, refresh tokens, and token introspection.
JWT Bearer Tokens
Stateless JWT authentication with RS256 signing, short expiry, refresh token rotation, and token blacklisting for logout. JWKS endpoint for public key distribution.
API Key Management
Self-service API key issuance with hashed storage, last-used timestamps, per-key permission scopes, and admin revocation — suitable for B2B API products.
mTLS for Service-to-Service
Mutual TLS for internal microservice APIs — each service presents a certificate; the gateway validates both sides. No shared secrets over the wire.
OWASP API Top 10 Hardening
We audit and harden against broken object-level auth, mass assignment, security misconfiguration, unrestricted resource consumption, and the full OWASP API Security Top 10.
Third-party API & LLM integrations
Third-Party API Integration
We integrate any third-party service that has a documented API — handling authentication, webhook verification, error handling, retry logic, and idempotency so your integration is robust from day one.
What we handle for every integration
- Credential storage in Secrets Manager (never .env files)
- Webhook signature verification & idempotent processing
- Exponential backoff retry on transient failures
- Daily reconciliation job to catch missed webhooks
- Test coverage: happy path + all documented error codes
- Sandbox → staging → production environment separation
LLM Integration API
We build APIs that expose LLM capabilities to your product — wrapping OpenAI, Anthropic Claude, Google Gemini, or self-hosted open-source models behind a clean, versioned API your frontend team can consume without understanding prompt engineering.
Chat Completion APIs
Multi-turn conversation endpoints with system prompt management, conversation history persistence, context window management, and token usage tracking per conversation.
RAG (Retrieval-Augmented Generation)
Document ingestion pipelines that chunk, embed, and store your content in a vector database (Pinecone, pgvector, Qdrant). Query endpoints retrieve relevant context before generation.
Streaming Completion
Server-Sent Events endpoint that streams LLM tokens to your frontend as they are generated — eliminating the perceived latency of waiting for a full response before rendering.
Function Calling / Tool Use
LLM agents that call your internal APIs as tools — looking up customer records, querying stock levels, booking appointments — with structured JSON output and error handling.
Vision & Multimodal APIs
Endpoints that accept image uploads and return structured JSON analysis using GPT-4o Vision or Claude — for document OCR, product image classification, and visual QA pipelines.
LLM API Gateway (Cost & Safety)
Proxy layer that caches identical prompts, enforces per-user token budgets, redacts PII before sending to third-party LLMs, logs all prompts/completions for audit, and falls back to a cheaper model when the primary is unavailable.
APIs that other teams love to consume
A poorly designed API is a multiplier of technical debt — every integration partner inherits your mistakes. We design APIs contract-first: the OpenAPI 3.1 specification is written and reviewed before the first endpoint is implemented. Resource naming is consistent, response formats are predictable, and error responses include enough context to debug without reading your source code.
We follow REST conventions correctly — not just HTTP verbs and JSON, but proper resource nesting, consistent pagination, meaningful HTTP status codes, and hypermedia links where useful. For GraphQL APIs, we design schemas that balance consumer flexibility with performance constraints, using DataLoader to prevent N+1 queries and depth limits to protect against abuse.
Choosing the right technology
| Technology | Best for | Throughput |
|---|---|---|
| PHP / Laravel | Rapid dev, CRUDs, Pakistani market apps | ⭐⭐⭐ |
| Node.js / Fastify | Real-time, streaming, JS full-stack teams | ⭐⭐⭐⭐ |
| Go / Gin | High-throughput microservices, fintech | ⭐⭐⭐⭐⭐ |
| Spring Boot | Enterprise Java, complex domain models | ⭐⭐⭐⭐ |
| Spring WebFlux | Reactive / non-blocking, streaming data | ⭐⭐⭐⭐⭐ |
| Quarkus | Native serverless, cloud-native Java | ⭐⭐⭐⭐⭐ |
| GraphQL (any lang) | Flexible data fetching, BFF layer | ⭐⭐⭐ |
| gRPC (Go / Java) | Internal microservice, binary efficiency | ⭐⭐⭐⭐⭐ |
Core capabilities
Frequently asked questions
Production APIs built for real traffic
An API that works in development and breaks under production load is worse than no API at all — it creates incidents, damages consumer trust, and is hard to fix under pressure. We load-test every API before launch using k6 or Gatling, profiling under realistic concurrent request patterns to identify bottlenecks before they reach production.
The key performance levers we apply: database query optimisation with EXPLAIN ANALYZE on slow queries, Redis caching for expensive aggregations, connection pooling (PgBouncer for PostgreSQL), async processing for non-blocking responses, and horizontal scaling behind a load balancer. Go and Spring WebFlux APIs get non-blocking I/O by design; PHP and Node.js APIs use queue workers to offload heavy tasks.
From contract to consumer-ready — the API development roadmap
Requirements & Consumer Analysis
Week 1We interview every API consumer (frontend teams, mobile devs, third parties) to document what data shapes they need, what operations matter, and what SLA they require. This prevents rebuilding endpoints after handover.
OpenAPI / Schema Contract Design
Week 1–2The API contract (OpenAPI 3.1 for REST or GraphQL schema for GraphQL) is written and reviewed before a single line of implementation code. All stakeholders sign off on the contract — it is the shared source of truth.
Architecture & Tech Stack Decision
Week 1–2Database design, authentication strategy (OAuth2 / JWT / API keys), caching topology, rate limiting approach, and queue architecture are designed before development. Technology choice (Go, Spring Boot, Laravel, Node) is finalised here.
Implementation (Sprint-based)
Weeks 2–NDevelopment in 2-week sprints. Each sprint delivers a working set of endpoints deployed to the staging environment, with integration tests proving they match the contract. You test against the real API, not mocks.
Testing & Contract Verification
Each sprintIntegration tests for all endpoints (happy path + error codes), contract tests against the OpenAPI spec using Dredd or Spectral, load tests with k6, and security scans for OWASP API Top 10 vulnerabilities.
Documentation & SDK Generation
Final sprintSwagger UI hosted alongside the API, Postman collection exported and versioned, SDK generation (TypeScript, Python) if required, and a developer onboarding guide with code examples for every endpoint.
Production Deployment & Monitoring
Go-liveBlue-green deployment, rate limit tuning, CloudWatch / Prometheus alerting on error rate and P99 latency, and a 30-day hypercare window where we monitor and fix any production issues immediately.
Related services
Software Development
Full-stack applications — from Laravel APIs and Angular portals to Go microservices — built to consume your API.
- Laravel
- React
- Angular
- Go
CRM & ERP Development
Business systems with clean REST APIs for third-party and mobile integrations.
- FilamentPHP
- Laravel
- REST API