API Development & Integration
We design and build secure, well-documented APIs and integrations — REST and GraphQL — that connect your apps, data and the third-party services you rely on, so everything works together.
APIs are the connective tissue of modern software — they let your apps, data and the services you rely on work together. We design and build secure, well-documented REST and GraphQL APIs, plus the integrations and middleware that make your systems talk to each other reliably.
Good APIs aren't just endpoints — they're versioned, secured, documented and monitored, with clean contracts your developers and partners can build on. We handle authentication, rate limiting, error handling and observability, so your integrations stay reliable as they scale.
Whether you need to expose your product's data, integrate a payment, CRM or logistics provider, connect a legacy system, or build an integration layer between many tools, you work with senior engineers who make integrations boring — in the best way: they just work.
Who is API development & integration for?
From first-time founders to enterprise teams, here's how different businesses use API development & integration — and the problems it solves.
Expose your data
Build clean, secure APIs so partners and your own apps can build on your product.
Connect your systems
Integrate the apps, payments and services you use into one reliable flow.
Modernise via APIs
Expose legacy systems through modern APIs without a full rewrite.
Partner integrations
APIs and webhooks that let partners integrate with your platform.
Signs it's time to invest in API development & integration
- Your systems don't talk to each other, so data is copied by hand.
- An integration keeps breaking or is unreliable.
- You need to connect a payment, CRM, ERP or logistics provider.
- Partners want to integrate but you have no public API.
- A legacy system locks your data away.
- Your APIs lack docs, versioning or security.
Solutions we deliver
Real, working software for real business problems — these are the kinds of projects we ship most often.
REST & GraphQL APIs
Secure, scalable, documented APIs built to last.
Third-party integrations
Payments, CRM, ERP, logistics, messaging and more.
Integration middleware
Reliable layers that connect and orchestrate your systems.
API gateways
Auth, rate limiting, versioning and monitoring in one place.
Legacy API enablement
Expose and modernise legacy systems through APIs.
Webhooks & events
Event-driven, real-time sync between systems.
Partner & public APIs
Developer-friendly APIs with docs and SDKs.
Data sync & ETL
Move and transform data reliably between systems.
Need API development & integration built around your exact process?
Tell us what you need — a senior engineer replies within 24 hours.
The business outcomes you can expect
Custom-built software isn't just a cost — it removes friction, cuts waste and compounds in value as you grow.
Systems that work together
Connected tools and data — no manual re-keying.
Reliable integrations
Hardened, monitored APIs that don't break in production.
Faster development
Clean APIs let your teams build features faster.
Unlock your data
Free data from silos and legacy systems.
Partner-ready
Let partners and customers integrate with your platform.
Secure by design
Auth, rate limiting and monitoring built in.
Less manual work
Automated flows replace copy-paste between tools.
Scales cleanly
APIs designed to handle growth in traffic and partners.
What does API development & integration cost?
API and integration work scales with the number and complexity of systems involved — a single integration is far smaller than a full integration platform. We scope the highest-value connections first.
Number of integrations
Each system or service you connect adds scope.
Complexity
Real-time, high-volume or legacy integrations add effort.
Security & compliance
Auth, encryption and compliance requirements shape the build.
Docs & developer experience
Public and partner APIs need docs, SDKs and versioning.
Get a tailored API development & integration quote — within 24 hours
Tell us what you need to connect and we'll propose an approach with clear pricing within 24 hours.
- Free & no obligation
- Clear, written estimate
- Start small, prove value first
Our API development & integration services
REST & GraphQL APIs
Secure, scalable, well-documented APIs built to last.
Third-party integrations
Connect payments, CRM, ERP, logistics and more.
Middleware & ESB
Reliable integration layers between your systems.
API gateways
Auth, rate limiting, versioning and monitoring.
Legacy connectivity
Expose and modernise legacy systems via APIs.
Webhooks & events
Event-driven integrations and real-time sync.
Docs & developer experience
Clear docs and SDKs your developers will love.
Security & reliability
Hardened, monitored APIs you can depend on.
Every engagement includes
Senior, dedicated engineers
Experienced talent working directly on your product — no juniors hidden behind a sales team.
Weekly demos & updates
Regular progress, transparent timelines and clear communication in your time zone.
Clean, documented code
Maintainable, well-tested code with documentation your team can build on.
Full source code & IP
NDA on request and complete IP assignment — the code is always yours.
Security & QA built in
Secure coding and quality assurance integrated throughout, not bolted on at the end.
Post-launch support
Maintenance, optimization and support to keep your product fast and secure.
Fixed, transparent pricing
A clear written estimate up front and no surprise invoices — you always know what you're paying for.
A dedicated point of contact
One senior contact who knows your project end to end — no being passed around a support queue.
From idea to launch, transparently
Connect
A free, no-obligation chat about your goals, challenges and what you want to build.
Discovery & analysis
We dig into your requirements, users and constraints to shape the right solution and architecture.
Proposal & estimate
A clear proposal — scope, timeline, team, tech stack and transparent pricing.
Onboarding & kickoff
We sign an NDA, set up access and tools, and align on milestones to start fast.
Architecture & build
Scalable, secure architecture, then agile sprints with CI/CD, code reviews and automated tests.
Beta & QA
We test in a staging environment — QA, security, performance and your feedback — then refine.
Launch & scale
We deploy to production with DevOps, then monitor, support and scale the application as you grow.
Technologies we build API development & integration with
A modern, battle-tested stack chosen to fit your product — click any technology to learn more.
Looking for a API development & integration company you can trust?
Work directly with senior engineers, in your time zone — no hand-offs.
Hire dedicated developers
Prefer to scale your own team for your API development & integration project? Add pre-vetted, senior engineers in days — dedicated or staff-augmented, in your time zone.
Hire Node.js Developers
Hire Node.js developers for fast, scalable back-ends, APIs and real-time apps. Senior engineers across Express, Nest and the modern Node ecosystem.
Learn moreHire SAP Consultants & Developers
Hire senior SAP consultants and developers — S/4HANA, ABAP, Fiori/UI5 and BTP across MM, SD, FICO, QM, PP and EWM. Implementations, S/4HANA migrations, integrations and AMS support, with experience in regulated industries like pharma. Dedicated or on-demand, in your time zone.
Learn moreHire .NET Developers
Hire dedicated .NET developers — Microsoft-certified engineers for secure, scalable enterprise apps, APIs and cloud software. Dedicated or staff augmentation.
Learn moreHire React Developers
Hire expert React developers for fast, modern, interactive web apps. Senior engineers fluent in React and Next.js, working in your time zone.
Learn moreHire Angular Developers
Hire experienced Angular developers for robust, enterprise-grade single-page applications. TypeScript-first engineers, dedicated or staff-augmented.
Learn moreWays to work with us
Dedicated team
A managed team focused only on your API development & integration project, scaled to your roadmap.
Build my teamStaff augmentation
Add senior engineers to your existing team in days — you stay in control.
Add talentNot sure which engagement model fits?
A quick call will tell you — no obligation, no hard sell.
Big-agency skill. Small-team attention.
You work directly with senior engineers — faster replies, founder-level care, and better value than the 1,000-person shops.
- Senior-led engineering — no juniors
- Time-zone overlap with the US, UK, Australia & UAE
- NDA, IP protection & transparent communication
- Working prototype in 2–7 days
Selected client work
Real, live client projects — explore the challenge, the build and the results behind each one.
IT Consulting · USADriving Qualified Leads for a US-Based IT Consulting Firm
A complete digital build for a US-based IT consulting firm — logo and brand identity, a fast website, SEO, AEO/GEO, content and social media — designed not just to look good, but to rank on Google, get found in AI answer engines, and bring in qualified leads.
Logistics · IndiaTripling Business for an International Courier & Cargo Company Through Local Search
A complete digital build for an Ahmedabad-based international courier & cargo company shipping to 220+ countries — a fast, conversion-focused website covering 24+ services, hosted and monitored on Microsoft Azure, with real-time shipment tracking, a rate calculator and quote tools, branding, and deep local SEO/AEO/GEO. The outcome: from not ranking in Google's top 100 to the first page across key markets, from zero online leads to 100+ enquiries a month, and roughly 3× business growth post-launch (client-reported).
Infrastructure & EPC · IndiaA High-Authority Website for a 48-Year-Old Infrastructure Leader
A search-first corporate platform for Velji Ratna Sorathia Infra (VRSIPL) — an AA-class, A− rated EPC contractor building India's infrastructure since 1978. We delivered a fast, deeply structured Next.js website covering 14+ service verticals, 12+ state landing pages, a 500+ project portfolio, an investor-relations centre and a media room — architected for search across infrastructure verticals and Indian states.
Read case studyReady to build API development & integration that fits your business?
Start with a free discovery call and a working prototype in days.
What our clients say
Real words from real clients — tap a quote to read the full case study.
“Acqurio Tech became our complete digital team — logo, website, SEO, content and social, all handled in one place. Within months we were ranking on the first page of Google and getting genuinely qualified leads, not just traffic. They're responsive, senior, and they actually move the needle.”
“Acqurio Tech rebuilt our entire online presence — a fast website on Azure, real-time tracking, quote tools, branding and SEO. We went from nowhere on Google to the first page across the US, UK, Canada and Australia, and from no online leads to over 100 enquiries a month — our business has roughly tripled since launch. They're responsive, technical, and they understand what a 24/7 courier business actually needs.”
“Acqurio Tech delivered a corporate website that finally matches our scale — every service vertical, every state we work in, our full project portfolio and an investor centre, all engineered for search. It's fast, genuinely premium, and it's helping us get found for the infrastructure work we do. A senior, dependable team.”
“Acqurio Tech took our whole IT modernisation off our plate. They moved 500+ GB of mail and data to Microsoft 365 without a minute of downtime, hardened it with MFA and endpoint protection, and rolled out firewalls, VPN and biometric access across our offices and construction sites. They're responsive, they genuinely know enterprise IT, and they've made our environment far more secure and reliable.”
“Acqurio Tech has been our complete digital team — they built our Shopify store, then rebuilt it headless so it's as fast and premium as our products, with a custom AI try-on and shade finder our customers love. They also run our SEO, social and ads. One senior team that genuinely gets our brand.”
“For the first time we run our whole FMCG operation — sales, purchase, manufacturing, inventory, HR and accounts — from one platform. Our 68-person field team lives in the mobile app, and I can see every rep, every beat and every order in real time on the dashboard. Acqurio Tech built exactly what we needed, on web, iOS and Android.”
Frequently asked questions
Everything you need to know about our API development & integration services. Still have a question?
Talk to an expertREST or GraphQL — which should we use?
It depends. REST is simple and widely supported; GraphQL is great when clients need flexible, efficient queries. We recommend the right fit for your use case.
Can you integrate with a specific service?
Almost certainly. We integrate payments, CRM, ERP, logistics, messaging and countless third-party services — and can build custom integrations where no SDK exists.
Can you expose our legacy system via an API?
Yes — we build modern API layers over legacy systems so you can integrate and modernise without a full rewrite.
Will the API be secure?
Yes — authentication, authorisation, rate limiting, encryption and monitoring are built in, following best practices.
Do you provide API documentation?
Yes — clear docs, and SDKs where useful, so your developers and partners can integrate quickly.
Do you maintain the integrations?
Yes — we monitor, maintain and update integrations so they keep working as the connected services evolve.
API Development & Integration — pricing & engagement
Hire a dedicated team or get a fixed quote for your API development & integration project — senior engineers from $20/hr, no lock-in and 100% IP ownership.
Dedicated developer
A senior developer, fully dedicated to your team — billed hourly or monthly.
- Senior-only, you interview & pick
- Works in your timezone & tools
- Hourly or monthly, no lock-in
- 100% code & IP ownership
Dedicated team
A managed team — developers, QA and a PM — built around your roadmap and scaled as you grow.
- Developers + QA + project manager
- Scale up or down monthly
- Weekly demos & transparent reporting
- Best value for ongoing products
Fixed-scope project
Scope, timeline and price agreed upfront for complete budget certainty.
- Written estimate before you commit
- Milestone-based billing
- Working prototype in 2–7 days
- Ideal for well-defined work
Rates are indicative and vary by seniority, stack and scope. See full pricing →
Have a API development & integration project in mind?
Tell us what you need and a senior engineer will reply within 24 hours, in your time zone — no obligation.
Start your API development & integration project
Tell us what you need — a senior engineer, not a sales rep, will reply within 24 hours, in your time zone.
- Free discovery call, no obligation
- NDA & full IP ownership
- Working prototype in 2–7 days
Request a free quote
Just name & email required — the rest is optional.