Well-designed APIs that connect your systems, power your products, and scale reliably — built by engineers who integrate for a living.

APIs are the connective tissue of modern software. Done well, they let your apps, partners, and systems talk to each other securely and reliably; done poorly, they become a bottleneck. TechEsperto designs and builds robust REST and GraphQL APIs, and integrates third-party services, so your systems work as one. Integration is our core strength as a SuiteCRM Elite Partner — we’ve spent a decade connecting business-critical systems cleanly.

We’ve delivered APIs and integrations across 500+ projects in 30+ countries over 10+ years.

Build Your API | Get a Free Quote | See Our Work

500+ projects delivered · 30+ countries served · 10+ years in business · 98% client retention · ISO 9001 certified · SuiteCRM Elite Partner

This is part of our wider custom software & SaaS practice.

Our API development services

• REST & GraphQL API development — clean, documented, versioned APIs for your products.
• Third-party API integration — connect to payments, messaging, mapping, and more; see API integration services.
• API for apps & SaaS — power your mobile apps, web apps, and SaaS.
• Microservices APIs — scalable, decoupled service architecture.
• API gateways & security — auth (OAuth), rate limiting, and access control.
• Webhooks & event-driven APIs — real-time, push-based integrations.
• API documentation — developer-friendly docs (OpenAPI/Swagger).
• Legacy API modernization — refactor and replace aging APIs; see legacy modernization.

Why choose TechEsperto for API development

• Integration is our core strength. We build APIs that connect cleanly to your CRM, ERP, and the wider stack.
• Designed to last. Versioned, documented, secure APIs that scale and stay maintainable.
• Secure by design. OAuth, encryption, rate limiting, and access control built in.
• You own everything. Clean, documented, fully owned code — no lock-in.
• Senior teams and transparent, milestone-based pricing.
• Proven delivery. 500+ projects, 30+ countries, 98% client retention, ISO 9001 certified.

Our API development process

1. Discover — the systems, consumers, and data your API must serve.
2. Design — endpoints, contracts (OpenAPI), auth, and versioning.
3. Build — implement secure, performant APIs.
4. Document — clear, developer-friendly documentation.
5. Test — functional, load, and security testing.
6. Deploy & monitor — gateways, monitoring, and support.

See our full approach on Our Process.

Technologies we use
REST, GraphQL, OpenAPI/Swagger; Node.js, Python (FastAPI/Django), PHP (Laravel); OAuth/JWT auth; API gateways; webhooks and message queues; and cloud deployment via integration & cloud.

Industries we serve
We build APIs for fintech & BFSI, retail & eCommerce, healthcare, logistics, education, and real estate. Browse all industries.

Frequently asked questions

• REST or GraphQL — which should we use? REST is simple and widely supported; GraphQL is flexible for complex, client-driven data needs. We recommend the right fit per use case, and can combine them.
• Can you integrate third-party APIs for us? Yes — payments, messaging, mapping, analytics, and more. See API integration services.
• How do you secure APIs? With OAuth/JWT auth, encryption, rate limiting, and access control — plus security testing before release.
• Will the API scale? Yes — we design for scale with efficient queries, caching, and (where needed) microservices and gateways.
• Do you document the API? Yes — clear, developer-friendly documentation (OpenAPI/Swagger) is standard.
• Can you modernize our existing API? Yes — see legacy software modernization.