Hire API Developers in India for Your Product Backend
Dedicated API developers who design, build, and maintain the endpoints, integrations, and data flows your applications depend on. Not freelancers. Not marketplace matches. Full-time, salaried Acquaint Softtech employees skilled in REST APIs, GraphQL, microservices, payment gateways, third-party integrations, webhook systems, and API security. NDA signed before any discussion. 100% IP ownership from day one.
70+
In-House Engineers$30
Starting Hourly Rate48 Hr
Onboarding Time48+
Clutch Reviews
Your APIs Are Slow, Fragile, and Undocumented. Let's Fix That.
Your payment gateway returns cryptic errors, your CRM doesn't sync with your product database, and every third-party integration was built by someone who left six months ago. Here's how we solve the four biggest API development problems companies face right now.
Third-Party Integrations That Break Every Time the Vendor Updates?
Outcome you need: Resilient integrations with proper versioning, error handling, and fallback logic.
Your Stripe webhook stops working after an API version change. Your shipping provider's API returns unexpected data formats. Every vendor update triggers a production incident. Our API developers build integrations with version pinning, response validation, retry logic, and circuit breakers so third-party changes don't cascade into your system failures.
Backend APIs That Are Slow, Undocumented, and Impossible to Extend?
Outcome you need: Fast, well-documented APIs that your frontend and mobile teams can build on confidently.
Your API responds in 3 seconds when it should respond in 300 milliseconds. There's no documentation, so every new developer spends weeks understanding the endpoints. Adding a new feature means touching 15 files. Our developers restructure APIs with proper resource design, pagination, caching, versioning, and auto-generated documentation using OpenAPI/Swagger.
Need Payment, Auth, or Data APIs That Meet Security and Compliance Standards?
Outcome you need: APIs with proper authentication, encryption, rate limiting, and audit trails.
For fintech, healthcare, and e-commerce platforms, API security isn't optional. Leaked tokens, missing rate limits, and unencrypted data transfers create real liability. Our developers build APIs with OAuth 2.0, JWT authentication, HTTPS enforcement, input validation, rate limiting, and complete request logging for audit compliance.
Hiring an Experienced API Developer Takes Months and Costs $150,000/Year?
Outcome you need: Production-ready API expertise, fast, at transparent rates.
Senior API developers in the US command $120,000-$170,000/year. Through Acquaint, you get dedicated API developers at $30/hr ($4,400/month) who've built banking payment APIs (XOALA), e-commerce marketplace integrations (Lampoo), and compliance endpoints (MAP FinTech). 48-hour onboarding instead of 4-month recruiting cycles.
Trusted by Companies Across the USA, UK, Europe & Beyond
What Our Dedicated API Developers Build for You
APIs are the invisible backbone of every modern application. When they're fast, secure, and well-documented, your frontend, mobile, and partner teams build faster. When they're not, everything slows down. Our API developers build the kind of endpoints your entire engineering organization can depend on.
🔗 RESTful API Design & Development
Resource-based API architecture following REST best practices. Proper HTTP methods, status codes, pagination, filtering, sorting, and HATEOAS where appropriate. Versioned endpoints, consistent response formats, and error handling that frontend developers actually appreciate working with.
🔷 GraphQL API Development
Schema-first GraphQL APIs for applications that need flexible data fetching. Resolvers, mutations, subscriptions, and DataLoader for efficient database queries. Ideal for mobile apps and SPAs where bandwidth matters and over-fetching from REST endpoints wastes resources and slows down user experience.
💳 Payment Gateway Integration
Stripe, PayPal, Razorpay, Adyen, Square, and custom payment provider integrations. Subscription billing, refunds, webhooks, PCI-compliant tokenization, and multi-currency support. Tested against edge cases like duplicate charges, network timeouts, and partial failures that break production payment flows.
🔐 API Security & Authentication
OAuth 2.0, JWT, API key management, role-based access control, rate limiting, IP whitelisting, and request signing. OWASP API Security Top 10 compliance. Input validation and output sanitization to prevent injection attacks, data leaks, and unauthorized access to protected endpoints.
🏗️ Microservices & Event-Driven APIs
Breaking monolithic backends into independently deployable services communicating through REST, gRPC, or message queues (RabbitMQ, Kafka, SQS). Event-driven architectures with webhooks, pub/sub patterns, and eventual consistency for systems that need to scale each component independently.
🔄 Third-Party API Integration
Connecting your application to CRMs (Salesforce, HubSpot), ERPs (SAP, Oracle), shipping providers (FedEx, DHL), communication platforms (Twilio, SendGrid), and hundreds of other services. Adapter patterns, retry logic, and circuit breakers so vendor API issues don't crash your application.
📋 API Documentation & Developer Experience
Auto-generated documentation with OpenAPI/Swagger, Postman collections, and interactive API explorers. SDKs and code samples for your API consumers. Onboarding guides that reduce integration time for partners and internal teams from weeks to hours.
⚡ API Performance & Optimization
Response time optimization through database query tuning, Redis caching, CDN configuration, connection pooling, and payload compression. Load testing with realistic traffic patterns to identify bottlenecks before they affect real users. APIs that respond in milliseconds, not seconds.
API Development Technology Stack
Our API developers work across multiple languages, frameworks, and platforms. We pick the right tools based on your existing stack, performance needs, and team familiarity.
How API Developers Accelerate Your Product and Business Growth
APIs are the foundation every modern application is built on. When your APIs are fast, secure, and reliable, your entire engineering team moves faster. When they're not, every team that depends on them slows down. Here's the concrete business impact a dedicated API developer delivers.
⚡ Ship Frontend and Mobile Features 3x Faster
When your APIs are well-designed, documented, and predictable, your frontend and mobile developers stop guessing and start building. Clean API contracts with auto-generated documentation mean your UI team can work in parallel instead of waiting for backend changes and deployment cycles.
🔗 Connect Every System in Your Business
Your CRM, payment processor, shipping provider, email platform, and analytics tool all hold pieces of your business data. API developers build the integrations that make these systems talk to each other automatically, eliminating manual data entry, copy-paste workflows, and the errors they create.
💳 Process Payments Reliably and Securely
Payment API integration is where most teams underestimate complexity. Edge cases like duplicate charges, webhook retries, partial refunds, and multi-currency conversions require specialized handling. Dedicated API developers build payment flows that handle every edge case without losing money or customer trust.
🔐 Protect Sensitive Data at Every Endpoint
Every API endpoint is a potential attack surface. Without proper authentication, input validation, and rate limiting, your application is vulnerable. API developers implement security as a core architecture layer, protecting customer data, transaction records, and internal systems from unauthorized access and abuse.
📈 Scale Your Platform Without Rewriting Everything
Well-designed APIs with proper separation of concerns let you scale individual services independently. As your user base grows from 1,000 to 1,000,000, your API architecture adapts through caching, load balancing, and horizontal scaling without requiring a complete backend rewrite that costs months and millions.
🤝 Enable Partners and Third-Party Integrations
If your product offers an API for partners, resellers, or third-party developers, the quality of that API directly determines adoption. Well-documented, stable APIs with proper versioning and developer onboarding attract more integrations, which drives more usage, which grows your platform's value and ecosystem.
How Our API Developers Ensure Endpoint Reliability
An API that works in testing but fails in production is worse than no API at all because other teams build on top of it. Our developers follow structured practices that ensure every endpoint is reliable, fast, documented, and safe to depend on for production workloads.
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Contract Testing & Integration Tests
Every API endpoint is tested against its contract before deployment. Input validation, response schema verification, error handling, and edge case coverage. Integration tests verify end-to-end flows across services so breaking changes never reach production undetected.
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Auto-Generated Documentation
OpenAPI/Swagger specs maintained alongside code so documentation never drifts from implementation. Interactive API explorers, Postman collections, and request/response examples generated automatically. Your frontend and partner teams always work against accurate, up-to-date endpoint definitions.
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Monitoring, Logging & Alerting
Request logging with correlation IDs for end-to-end traceability. Response time monitoring, error rate tracking, and throughput metrics dashboarded in real time. Alerts trigger before degradation becomes an outage, giving your team time to respond proactively instead of reactively.
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Load Testing & Performance Baselines
Every critical API path is load tested with realistic traffic patterns before launch. Performance baselines established so regressions are caught during CI/CD, not in production. Capacity planning ensures your APIs handle peak traffic without degradation or timeouts during high-demand periods.
API Development in Production - Verified on Clutch
Named clients. Specific backend outcomes. Publicly auditable on Clutch.co.
Payment & Wallet APIs for Neo Bank - XOALA
Sweden | Neo Bank / FinTech | Banking APIs
Client: XOALA (Nick Kundnani, Founder) - a fully regulated European neo bank. We built and modernized APIs supporting parallel banking, card acquiring, and crypto wallet workflows within a single portal. API security included encrypted storage, role-based access, and complete audit trails without impacting transaction processing speed across live payment and IBAN operations.
Zero Performance impact | Full Audit trails | 5.0 Clutch
Stack: API Development | Payment Integration | Role-Based Access | Fintech Security
E-Commerce Marketplace API Platform - Lampoo
Italy | E-Commerce Marketplace | APIs
Client: Lampoo (Enrico Trombini, Founder) - an Italian e-commerce marketplace. We built APIs that powered product catalog management, seller upload workflows, and buyer-facing search and filtering. The integration improved site speed, increased session duration on product pages, reduced dropped carts, and streamlined the entire seller onboarding process through backend API optimization.
Faster Site speed | Fewer Dropped carts | 5.0 Clutch
Stack: REST API | E-Commerce Backend | Product Catalog | Seller Integration
Compliance API Platform - MAP FinTech
Cyprus | Financial Services | Compliance APIs
Client: MAP FinTech (Panayiotis Omirou, CEO) - a financial services compliance company. We built API endpoints that structured compliance review workflows, enabled systematic data tracking across the platform, and created clear audit trail access for regulators. The API architecture made internal compliance reviews smoother and issue resolution significantly faster.
Smoother Compliance reviews | Faster Issue resolution | 5.0 Clutch
Stack: API Development | Compliance Workflows | Audit Trail Endpoints | Data Tracking
Aviation Safety Reporting API - ASQS
Austria | Aviation | Reporting APIs
Client: ASQS (Gunther Schindl, Co-Founder) - an aviation safety and quality management company. We built APIs powering their event-reporting module, enabling structured incident data capture, risk pattern visualization for end customers, and streamlined audit workflows. The API integration reduced internal support tickets and improved module stability across their platform.
Fewer Support tickets | Stable Event reporting | 5.0 Clutch
Stack: API Development | Event Reporting | Risk Visualization | Audit Workflows
Acquaint Softtech vs API Agencies vs Freelancers
An objective side-by-side. We show where we're stronger and where others might fit better.
| Criteria | Acquaint Softtech | Other API Agencies | Freelancers / Upwork |
|---|---|---|---|
| Model | Dedicated full-time engineers | Project-based consulting | Open marketplace |
| Rate | $30/hr | $80-200/hr | $18-150/hr |
| Full-Time Monthly | $4,400/mo | $12,800-32,000/mo | Varies widely |
| Stack Flexibility | Laravel, Node, Python, .NET | Varies by agency | Varies per freelancer |
| IP Ownership | ✓ 100% yours. NDA day one. | Often retained by consultancy | Often unclear |
| Avg Engineer Tenure | 24+ months | Engagement-based | Project-based |
| Onboarding Speed | 48 hours | 2-4 weeks | Immediate but risky |
| Verified Reviews | ✓ 48+ Clutch reviews, 4.9/5 | Varies | Platform reviews |
| ✓ ISO 27001 | ✓ Certified | ✗ Varies | ✗ Not applicable |
| Named API Case Studies | ✓ Verified on Clutch | Individual profiles only | No |
| Best For | Long-term dedicated data engineering | Short-term strategy + implementation | Simple one-off tasks |
See Exactly How Much You Save Hiring Remote API Developers
Most clients save 60-80% compared to US/UK API developers. Same REST conventions, same authentication patterns, same API design principles. The cost advantage is structural, not a quality trade-off.
Full-Time Senior API Developer
US API Developer (in-house)
$10,000-$14,200/mo
UK API Developer (in-house)
£5,000-£8,500/mo
Annual saving vs US hiring
$67,000 - $117,000/yearCost to Hire API Developer
Clear, predictable rates. No recruitment fees. No setup charges. No lock-in. No per-endpoint pricing surprises.
- → Flexible hourly engagement
- → New endpoints, integration fixes
- → Monthly billing, time tracked
- → NDA and IP protection
- → 1-week notice to pause
For updates, tuning, and support tasks
- → Your API developer - your endpoints only
- → Daily standups, direct Slack access
- → Sprint-based agile workflow
- → Free replacement guarantee
- → Full NDA and IP ownership
- → 1-month exit, zero penalties
For product teams and continuous development
- → Dedicated API squad
- → Backend + integration + testing
- → Milestone-based payments
- → Volume pricing available
- → Post-launch support included
For defined deliverables or team scaling
API Developers for Your Specific Situation
🚀 For Startups Building APIs
Ship your product's core API without over-engineering. Clean endpoint design, proper authentication, and documentation from day one so your mobile and frontend teams can build in parallel from the start.
📈 For SaaS Scaling Integrations
Your customers want integrations with Salesforce, HubSpot, Slack, and Stripe. Our developers build the integration layer that connects your SaaS product to the tools your customers already use and depend on.
🏢 For Agencies (White-Label)
Your client needs API development and your team specializes in frontend or design. Full NDA, your brand, no direct client contact unless you want it. Your clients think your team built the backend.
🏛️ For Enterprise API Modernization
Legacy SOAP services, undocumented endpoints, and brittle integrations holding you back. Our developers migrate to modern REST or GraphQL APIs incrementally while keeping existing consumers working throughout the transition.
💳 For FinTech API Development
Payment processing APIs, compliance endpoints, KYC workflows, transaction monitoring. Built APIs for XOALA, MAP FinTech, FLIQA Payments, National Inkasso. ISO 27001 certified. Security is architecture, not an afterthought.
🌍 For Distributed Teams
Already have frontend or mobile developers but need dedicated backend API capacity? Our developers integrate into your existing repo, CI/CD pipeline, and API conventions without disrupting your team's delivery rhythm.
API Developers Who Know Your Industry's Integration Needs
Every industry has unique API requirements, from compliance and security standards to real-time performance demands. Our API developers have built integrations across these sectors.
🤖 AI-Driven Platforms
ML model serving APIs, prediction endpoints, LLM integration layers, feature store APIs, and AI workflow orchestration services connecting models to production apps
📱 On-Demand Solutions
Real-time order tracking APIs, driver assignment endpoints, push notification services, geolocation APIs, and dynamic pricing calculation services for live operations
🛒 E-Commerce & Marketplaces
Product catalog APIs, checkout and cart endpoints, seller management integrations, payment gateway connections, inventory sync, and order processing pipeline services
🏥 Healthcare & HealthTech
HIPAA-compliant patient data APIs, HL7/FHIR integration endpoints, appointment scheduling services, lab result delivery APIs, and secure clinical data exchange layers
🏠 Real Estate & PropTech
Property listing aggregation APIs, tenant management endpoints, payment reconciliation services, document upload APIs, and market data integration from MLS providers
🔮 Emerging Technology
MVP backend APIs built for rapid iteration and investor-ready scalability, webhook systems for partner integrations, and extensible API architectures that grow with usage
🎓 Education & EdTech
LMS integration APIs, enrollment processing endpoints, assessment scoring services, content delivery APIs, and student progress tracking webhooks for partner platforms
💳 Finance & FinTech
Transaction processing APIs, KYC verification endpoints, compliance reporting services, payment gateway orchestration, and multi-bank aggregation APIs for open banking
⚙️ SaaS & Subscription Platforms
Public developer APIs, subscription billing endpoints via Stripe or Chargebee, usage metering services, webhook event delivery systems, and OAuth-based partner integrations
Hire API Developers in 48 Hours
A simple, friction-free process built around your time - not ours.
Share Requirements
Tell us what AI capabilities you need. 3 minutes via form, email, or WhatsApp.
Receive Profiles
Get 2–3 matched AI/ML engineer profiles within 4 hours.
Interview Directly
Speak with candidates. Assess technical depth and team fit. No middlemen.
Sign NDA & Select
Choose your engineer. NDA signed. IP terms agreed. Access provisioned.
Engineer Starts
First sprint planned, development begins. Within 48 hours of first contact.
Risk-Free API Hiring. You Own Every Endpoint, Integration, and Line of Code.
Most companies hesitate to outsource API development because they worry about code quality, data security, and being locked into a vendor's architecture. We've removed all three risks. NDA before any discussion, 100% IP transfer from day one, and a clean 30-day exit anytime.
🛡️ 1-Week Risk-Free Trial
Try your API developer for a full week. Not satisfied with their endpoint design, code quality, or integration approach? We replace them at zero cost. No questions, no paperwork, no risk on your side.
🔒 NDA Before Any Discussion
Your API architecture, business logic, and data flows are proprietary. Legal protection starts at the very first conversation, before we see a single endpoint or learn anything about your system design.
📄 100% IP Ownership from Day 1
Every API endpoint, integration script, webhook handler, and documentation file is unconditionally yours from the first commit. No licensing, no reuse clauses. Zero disputes in 1,300+ projects.
🚪 1-Month Exit with Zero Penalties
No termination fees. No long-term contracts. No lawyers needed. If your integration needs change or you hire internally, give us 30 days notice and walk away with complete code handover and API documentation.
🔄 Free Developer Replacement
If your API developer leaves, underperforms, or isn't the right fit for your tech stack, we provide an immediate replacement at zero additional cost. No gaps in your sprint velocity or integration timeline.
🔐 ISO 27001 Data Security
Encrypted storage, role-based access controls, and full audit logging on every engagement. Your API keys, database credentials, and webhook secrets stay protected under enterprise-grade security standards.
What Clients Say After They Hire Laravel Developers from Acquaint Softtech
Companies across the US, UK, and Europe chose Acquaint Softtech. Here's what they said - verified on independent platforms.
Frequently Asked Questions
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What does an API developer do?
An API developer designs, builds, tests, and maintains the endpoints and integrations that allow different software systems to communicate with each other. This includes RESTful APIs, GraphQL APIs, payment gateway integrations, third-party service connections, webhook systems, and microservice communication layers. At Acquaint Softtech, our API developers focus on production-grade endpoints that are fast, secure, well-documented, and reliable enough for other teams to build on.
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API developer vs backend developer vs full-stack developer?
A backend developer builds server-side application logic, databases, and business rules. An API developer specializes specifically in endpoint design, integration architecture, and inter-service communication. A full-stack developer covers both frontend and backend. If your primary need is connecting systems, building integrations, or creating a public API for partners, an API developer is the focused hire.
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How much does it cost to hire an API developer from India?
Through Acquaint Softtech, dedicated API developers start at $30/hr ($4,400/month full-time). In the US, API developers cost $120,000-$170,000/year. API agencies charge $80-200/hr. The cost advantage is structural. Our developers work with the same REST conventions, OAuth standards, and API design patterns used by engineering teams at Stripe and Twilio.
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REST vs GraphQL - which should I use?
REST is the best choice for most applications - simple, cacheable, widely understood, and easy to document with OpenAPI/Swagger. GraphQL is better when your clients (especially mobile apps) need flexible data fetching to avoid over-fetching or under-fetching from multiple endpoints. If you're unsure, start with REST. Our developers can advise based on your specific data patterns and client needs.
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Can you integrate with our existing payment gateway?
Yes. We've integrated Stripe, PayPal, Razorpay, Adyen, and custom payment providers. This includes subscription billing, webhook handling, refund workflows, multi-currency support, and PCI-compliant tokenization. We test against edge cases like duplicate charges, timeout retries, and partial failures that most tutorials skip.
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Can I hire an API developer for a short-term project?
Yes. Part-time engagement starts at $30/hr (up to 4 hours/day). Fixed-scope API projects start from $8,000. For short-term needs like building a specific integration, fixing broken webhooks, or documenting an existing API, part-time or project-based engagement works well.
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What programming languages do your API developers use?
Laravel (PHP), Node.js/Express, Python/FastAPI/Django REST, ASP.NET Core Web API, NestJS, and Ruby on Rails. We match the developer's expertise to your existing stack so there's no learning curve or technology migration required.
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How does Acquaint compare to other Indian API development companies?
48+ verified Clutch reviews at 4.9/5, 1,293+ Upwork reviews (98% success rate), ISO 27001 certified. Named API case studies including banking payment APIs (XOALA), e-commerce marketplace APIs (Lampoo), compliance endpoints (MAP FinTech), and aviation reporting APIs (ASQS). Most competitors show generic portfolios. Our results are publicly auditable on Clutch.
India (Head Office)
203/204, Shapath-II, Near Silver Leaf Hotel, Opp. Rajpath Club, SG Highway, Ahmedabad-380054, Gujarat
USA
7838 Camino Cielo St, Highland, CA 92346
UK
The Powerhouse, 21 Woodthorpe Road, Ashford, England, TW15 2RP
New Zealand
42 Exler Place, Avondale, Auckland 0600, New Zealand
Canada
141 Skyview Bay NE , Calgary, Alberta, T3N 2K6
Your Project. Our Expertise. Let’s Connect.
Get in touch with our team to discuss your goals and start your journey with vetted developers in 48 hours.