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All Services APIs & Integration

Custom API Development & Integration Services

We design secure APIs and connect the systems your business depends on, from payment gateways and e-signature to POS platforms, channel managers and legacy databases, so data flows without manual re-entry.

  • We buildREST APIs, integrations, webhooks and data sync
  • ForProduct teams and businesses with disconnected systems
  • SolvesManual re-entry, inconsistent data and fragile connections
Free, no-obligation consultation NDA before detailed discussion You own the code on full payment
Custom API Development Services for Scalable Business Apps - Kawach Technology
200+
Projects Delivered
8+
Years in Business
50+
Team Experts
9+
Countries
98%
Satisfaction
98%
On-Time Delivery
Who We Help

Built for Teams at Different Stages

What a startup needs from API Development & Integration is different from what an enterprise needs. We scope each engagement around where your business is today.

Startups

A focused first version that validates the idea quickly, built on architecture that can grow once the product finds traction.

Growing businesses

Replacing spreadsheets, manual steps and disconnected tools with software built around how the business actually runs.

Mid-market companies

Extending or integrating existing systems, adding capacity alongside an in-house team, or owning a defined module end to end.

Enterprises

Secure, well-documented systems that connect departments and legacy platforms, with clear governance and handover.

Business Problems We Solve

Where API Development & Integration Makes a Difference

Most projects start with a business problem, not a technology choice. These are the situations clients most often bring to us.

Integrating disconnected systems

Keeping data consistent between the platforms different teams rely on.

Connecting APIs and third-party systems

Payments, identity, e-signature, messaging, maps and industry platforms.

Serving web and mobile apps

One secure API behind your web app, mobile apps and partners.

Legacy system access

Exposing data from older systems safely without rewriting them first.

Real-time data needs

Webhooks, queues and streaming for live status and device data.

Unreliable integrations

Retries, monitoring and logging so failures are caught and recovered.

What We Build

API Development & Integration Capabilities

The components we design and deliver most often, scoped to what your product actually needs.

REST API design

Versioned, documented APIs with authentication and rate limiting.

Payment integrations

Stripe and Razorpay for one-off, recurring and marketplace payments.

Identity & KYC

eKYC and PAN verification integrations for onboarding flows.

E-signature

DocuSign and e-sign gateway integrations for contracts and approvals.

Industry platforms

Channel managers, PMS, POS and MLS RESO real-estate data feeds.

Messaging & maps

Twilio SMS/video, Mailgun email and Google Maps & Directions.

Real-time & IoT data

MQTT and webhook pipelines for device and location data.

API Development & Integration: Overview

API Development Services

Kawach provides reliable and scalable API development services for businesses looking to improve software connectivity, automate workflows, and build modern digital products. We help startups, SaaS companies, enterprises, and growing businesses create secure and high-performance APIs that support web applications, mobile apps, cloud platforms, and enterprise systems.

Our team develops custom APIs that make communication between applications smooth, fast, and secure. Whether you need RESTful APIs, GraphQL APIs, SOAP APIs, or third-party API integrations, Kawach delivers solutions designed around your business goals and future growth.


Custom API Development Solutions

At Kawach, we build APIs that are easy to integrate, scalable for future expansion, and optimized for performance. Every API is developed with clean architecture, proper documentation, and strong security practices.


Our API development services include:

  • Custom API Development
  • REST API Development
  • GraphQL API Development
  • SOAP API Services
  • Third-Party API Integration
  • Cloud API Integration
  • API Gateway Setup
  • API Testing & Optimization
  • API Maintenance & Support
  • API Security Implementation
  • Microservices Architecture
  • API Documentation Services

We focus on creating APIs that help businesses connect systems, improve user experiences, and reduce manual processes.


REST API Development Services

REST APIs are one of the most popular technologies for modern software applications. Kawach develops RESTful APIs that are lightweight, secure, and easy to integrate with websites, mobile apps, SaaS platforms, and enterprise software.

Our REST API services are designed for:

  • Web Applications
  • Mobile Applications
  • E-commerce Platforms
  • CRM & ERP Systems
  • Fintech Solutions
  • Healthcare Platforms
  • IoT Applications
  • Cloud-Based Software

We follow industry best practices to ensure fast response times, smooth performance, and secure communication between systems.


Secure API Development

Security is a top priority in every API project we deliver. Our developers implement modern authentication and authorization methods to protect user data and business systems.

Our API security features include:

  • OAuth 2.0 Authentication
  • JWT Token Security
  • SSL Encryption
  • Role-Based Access Control
  • API Rate Limiting
  • Secure Data Transmission
  • API Monitoring & Logging

We also conduct API testing and security audits to reduce vulnerabilities and maintain compliance with industry standards.


Third-Party API Integration

Many businesses rely on external services such as payment gateways, CRMs, cloud platforms, and analytics tools. Kawach helps companies integrate third-party APIs smoothly into their existing systems.

We work with integrations including:

  • Payment Gateway APIs
  • Social Media APIs
  • Cloud Service APIs
  • Shipping & Logistics APIs
  • CRM APIs
  • ERP APIs
  • SMS & Email APIs
  • AI & Automation APIs

Our integration services improve business efficiency and help companies streamline operations.


Scalable API Architecture

Kawach develops APIs using scalable and modern architecture that supports long-term business growth. We use microservices and cloud-native technologies to build APIs capable of handling large volumes of traffic and data.

Our scalable API solutions help businesses:

  • Improve system performance
  • Support multiple applications
  • Handle increasing user traffic
  • Enable faster software updates
  • Reduce operational complexity
  • Improve overall application stability


API Testing and Maintenance

Building an API is only the beginning. We provide continuous API support, monitoring, optimization, and maintenance to ensure long-term reliability.

Our testing services include:

  • Functional API Testing
  • Load Testing
  • Performance Testing
  • Security Testing
  • Automated API Testing

We monitor API performance regularly and provide updates based on changing business requirements and technology standards.


Why Choose Kawach for API Development?

Kawach has successfully delivered multiple API development projects for businesses across different industries. Our team combines technical expertise with a practical business approach to deliver solutions that are secure, scalable, and easy to manage.

What makes Kawach different:

  • Experienced API Developers
  • Agile Development Process
  • Fast Project Delivery
  • Scalable API Solutions
  • Secure Development Standards
  • Transparent Communication
  • Ongoing Technical Support
  • Custom Solutions for Every Business

We focus on creating APIs that help businesses improve efficiency, reduce development time, and support digital transformation.


Industries We Serve

Kawach provides API development services for businesses in:

  • Healthcare
  • Fintech
  • E-commerce
  • Education
  • Logistics
  • Real Estate
  • SaaS Platforms
  • Manufacturing
  • Travel & Hospitality

Our experience across industries helps us deliver solutions tailored to specific business needs.


Modern API Development for Future Growth

Modern businesses need software systems that can communicate efficiently across platforms and devices. Kawach helps companies build future-ready API infrastructures that improve connectivity, automation, and customer experience.

Whether you need a custom API, cloud integration, or enterprise-level API architecture, our team is ready to deliver reliable solutions that support your business growth.


Partner with Kawach

If you are looking for a trusted API development company, Kawach is here to help. We develop secure, scalable, and high-performance APIs designed for modern digital businesses in the USA, Europe, and global markets.

Contact Kawach today to discuss your API development project and build powerful software solutions that grow with your business.

Start Your Project
Free consultation, no commitment
Working With Us
  • TimelineAgreed after discovery; focused MVPs typically take 3–6 months
  • TeamProject manager, developers and QA assigned to your project
  • NDASigned before any detailed project discussion
  • Agile delivery2-week sprints with a working demo each sprint
  • Post-launch support30 days of post-launch support included
  • ClientsIn 9+ countries, including the USA, UK and Europe
Development Process

How We Deliver, Step by Step

The same six-step process runs underneath every engagement. What changes is the scope, not the discipline.

  1. 1

    Discovery

    We map your goals, users, workflows and constraints, then agree scope, priorities and a realistic timeline before development starts.

  2. 2

    Architecture

    We choose the stack, data model, integrations and hosting approach around your requirements, and document the decisions.

  3. 3

    UI/UX

    Wireframes and interface designs are reviewed with you, so the product is shaped around real user journeys before it is built.

  4. 4

    Development

    Two-week sprints with a working demo at the end of each, so you can review progress and adjust priorities as you learn.

  5. 5

    QA & Testing

    Functional, regression and cross-device testing throughout the build, not only at the end, before anything reaches production.

  6. 6

    Deployment & Support

    We release to your environment and include 30 days of post-launch support, with ongoing maintenance available afterwards.

Technology Stack

Technologies We Use for API Development & Integration

Chosen per project based on your requirements, existing systems and team. These are the technologies behind our delivered work in this area.

Laravel / PHP Node.js Python PostgreSQL Redis Stripe Razorpay DocuSign API Twilio MQTT
Case Studies

Relevant Projects We've Delivered

A selection of documented projects that show how we approach this kind of work. Each links to the full case study.

Hospitality / Boutique Hotels · London, United Kingdom

Harborview Hospitality Group

Business problem
Harborview Hospitality Group runs 22 boutique hotels across the UK and Ireland, each with its own character but sharing one uncomfortable business reality: roughly 70% of reservations arrived through...
Solution
We built a single, modern direct-booking engine to replace the patchwork of outdated per-property widgets, integrated with a channel manager so availability and rates sync automatically across every O...
Key functionality
Direct Booking EngineChannel Manager IntegrationUnified Guest Profile (CRM)Dynamic Rate Parity Automation
Technology
Laravel, React, PostgreSQL, Channel Manager API, Stripe, AWS
+31%Direct Booking Share
-24%OTA Commission Costs
Read the case study
FinTech / NBFC Lending · Pune, India

QuickFund Financial Services

Business problem
QuickFund Financial Services had grown its loan book past ₹200 crore largely on the strength of its underwriting team's judgment — but that same manual process had become the ceiling on how much furth...
Solution
Because this was a regulated lending business, we started with QuickFund's risk and compliance teams, not the engineering backlog — working through RBI's digital lending guidelines together before des...
Key functionality
Digital Loan OriginationAutomated KYC VerificationCredit Scoring EngineE-Sign Loan Agreements
Technology
Laravel, Python, PostgreSQL, AWS, Aadhaar eKYC API, ML
5-7 days → 12 minLoan Approval Time
< 3 minKYC Verification Time
Read the case study
Restaurant / Food Service · Lyon, France

Bistro Nationale Group

Business problem
Bistro Nationale Group grew to 85 locations across France partly through acquiring smaller regional chains, and each acquisition brought its own point-of-sale system along with it. By the time Bistro...
Solution
Rather than ripping out 85 different POS setups at once — a change management nightmare and an unnecessary one — we built a unified data layer that sits above the existing POS hardware wherever possib...
Key functionality
Unified POS Data LayerFirst-Party Online OrderingDigital Kitchen Display System (KDS)Chain-Wide Sales & Inventory Dashboard
Technology
Node.js, React, PostgreSQL, Stripe, AWS, POS Integration APIs
-34%Aggregator Fee Spend
-26%Kitchen Ticket Time
Read the case study
Real Estate / PropTech · San Francisco, California, USA

Sequoia Peak Realty Group

Business problem
Sequoia Peak Realty Group had grown to more than 40 offices and 2,000 agents largely through acquisition, which meant it had also inherited more than 40 different ways of doing the same basic job. Lis...
Solution
The fix had to start with data, not features: we built a unified listing sync engine that treats one system as the single source of truth and pushes updates out to the MLS, the public website, and the...
Key functionality
Unified Listing Sync EngineAutomated Lead RoutingTenant & Lease PortalMaintenance Request Tracking
Technology
Laravel, Vue.js, MySQL, DocuSign API, AWS, MLS RETS/RESO integration
18 hrs → 12 minLead Response Time
99%+Listing Data Accuracy
Read the case study

View all case studies

Security & Confidentiality

How We Protect Your Project and Data

Security is handled as part of how we build, from the first discussion to deployment, not as a separate add-on.

We don't claim certifications we can't document. If your project must meet a specific standard or regulation (for example GDPR or HIPAA), we agree those requirements with you during discovery and build to them.
Privacy Policy Terms & Conditions Company registrations

Secure development practices

Code review, dependency updates and secure credential handling are part of the normal build process.

Access control

Role-based permissions in the software we build, and codebase and credential access limited to the engineers assigned to your project.

Data protection

Encrypted connections, encrypted storage where the project calls for it, and data handled only for the purpose of the engagement.

Backups

Backup and restore procedures are planned as part of the hosting setup, not added after launch.

Deployment security

Separate environments, restricted production access and controlled release steps for every deployment.

Testing

Functional and regression testing throughout the build, with access and permission rules checked before release.

Confidentiality

We sign an NDA before any detailed project discussion, and custom deliverables transfer to you on full payment.

FAQ

Questions Buyers Ask About API Development & Integration

Can you integrate with a system that has no public API?

Often, yes, for example through database access, file exchange or a small adapter service. We assess the options and any risks during discovery before committing to an approach.

Do you document the APIs you build?

Yes. APIs are delivered with documentation of endpoints, authentication and error handling, so your team or future partners can use and maintain them.

How long does a typical project take?

It depends on scope. A focused MVP typically takes 3–6 months; a more complex platform with significant integrations can run 9–12+ months. We give a realistic timeline after the discovery phase, once we understand your actual requirements, not before.

How much will my project cost?

Cost depends on features, complexity, integrations and the engagement model. As a general reference, a focused MVP typically starts in the low five figures, a mid-sized application usually falls in the mid five figures, and a full enterprise or AI-powered platform can run into six figures. We provide a scoped estimate once we understand your requirements.

Who owns the source code and intellectual property?

You do. Under our standard terms, ownership of custom deliverables (source code, designs and related work product) transfers to you on full payment. Any pre-existing Kawach Technology tools or libraries used in the project are licensed to you for use in the delivered product. A signed SOW or agreement can set different terms.

Can you work with our existing systems and in-house team?

Yes. We regularly integrate with existing databases, CRMs, ERPs, payment gateways and third-party APIs, and we often work alongside in-house teams, either filling a specific skills gap or owning a defined module while your team owns the rest.

Which engagement models do you offer?

Fixed price for well-defined scopes, a dedicated team for ongoing product work, or time and materials when requirements are still evolving. We recommend a model based on your budget, timeline and how much day-to-day control you want.

How do you communicate with international clients?

Our engineering team is based in India. We schedule sprint planning, demos and key decisions in the working-hours overlap with your time zone, and back them up with written updates, a shared project board and a dedicated point of contact. We work with clients in the USA, UK, Germany and wider Europe.

How do you keep our project and data secure?

We sign an NDA before detailed discussions, restrict codebase and credential access to the engineers assigned to your project, and follow standard secure development practices such as access controls, encrypted storage and secure credential handling. If your project must meet a specific regulatory standard, we agree those requirements during discovery.

What happens after launch?

Every project includes 30 days of post-launch support. After that, continued assistance is available under a separate agreement, sized to what your product needs.

Have a Software Project in Mind?

Tell us what you're building, what you're trying to improve, or where your current software is falling short.

We usually respond within 24 business hours · NDA available before detailed discussion · contact@kawachtech.com