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Development service

APIs and Integrations That Do Not Break at Midnight

Well-documented endpoints, sensible errors, versioned from day one.

Get a free quote +91 766-599-1888
Typical timeline
2-10 weeks
Quote
Free, within 1 working day
Based in
Udaipur, serving all India

Most business systems fail at the seams rather than in the middle. The website cannot see live stock, the accounts package needs manual re-entry, the CRM and the billing system disagree about who is a customer, and somebody spends two hours every Friday reconciling exports. Integration work is unglamorous and it removes more waste than almost anything else you can buy.

I build APIs and connectors designed for the day something goes wrong — because it will. That means idempotent operations so a retry does not double-charge anyone, queued jobs with backoff when the far end is down, structured logs that show exactly which payload failed, and alerts that reach a human. An integration that silently stops is worse than no integration at all.

Every integration ships with a retry policy, a failure alert and a log you can search. Silent failure is the enemy.

What is included

01

REST API development

Versioned, authenticated, rate-limited APIs with OpenAPI documentation your partners can actually use.

02

GraphQL APIs

A single flexible endpoint for clients that need to shape their own queries without a dozen bespoke routes.

03

Payment gateway integration

Razorpay, PhonePe, Cashfree, PayU, Stripe and PayPal with webhook verification and reconciliation reporting.

04

Accounting and GST connectors

Two-way Tally and Zoho Books sync, GST e-invoice IRN generation and e-way bill automation.

05

Messaging and notifications

WhatsApp Business API, SMS gateways, transactional email and push notification dispatch with delivery tracking.

06

Legacy and partner integration

Connecting to SOAP services, FTP drops, fixed-width files and whatever the other side insists on using.

Why it is worth doing properly

  • Manual re-entry between systems disappears, along with the errors it caused
  • Retries and idempotency keys prevent duplicate charges and duplicate records
  • Documentation your other vendors can work from without calling me
  • Monitoring and alerts so a broken connector is noticed in minutes, not weeks

Technology used

Chosen to suit the project and your team, not to pad an invoice.

LaravelNode.jsOpenAPIPostmanOAuth 2JWTWebhooksRabbitMQRedis
750+
Projects delivered
10+
Years of experience
4.9/5
Average client rating
18
Countries served
How it works

From first call to launch

The same seven steps on every project, so you always know what happens next.

01

Discovery call

A straight conversation about what the business does, what is not working and what success looks like. No slide deck. If I am not the right fit for the project, I will say so here rather than three weeks in.

45-60 minutes
02

Written scope and fixed quote

You get a document listing exactly what will be built, what is excluded, the timeline in milestones and a fixed price. Nothing starts until you have read it and agreed. The scope is yours to keep either way.

2-4 days
03

Design you can click

Wireframes first for structure, then visual design. For websites you approve a working page in the browser rather than a flat image, so what you sign off is genuinely what gets built.

1-2 weeks
04

Build in visible milestones

Development runs in two-week milestones on a staging URL you can open any time. You see progress as it happens instead of receiving a status report about work you cannot verify.

2-16 weeks
05

Testing and your review

Cross-browser and mobile testing, speed and security checks, and a review round where your team uses the system properly and lists what needs changing before launch.

3-7 days
06

Launch and handover

Deployment, analytics and Search Console setup, a walkthrough recording for your team, documentation, and full credentials handed over. You own everything, including the source code.

1-2 days
07

Support after launch

A warranty period covering any bugs at no charge, then an optional maintenance plan for updates, backups, monitoring and new features. No lock-in either way.

Ongoing
FAQ

API & Integration — common questions

The questions that come up on almost every enquiry, answered honestly.

Can you integrate our website with Tally?
Yes. Typically orders and invoices push from the website into Tally and stock or ledger data flows back, using Tally XML over its HTTP interface or scheduled file exchange where the server is not exposed. The sync is queued and logged so nothing disappears quietly.
Do you work with WhatsApp Business API?
Yes, through official BSPs. That covers template message approval, order confirmations, delivery updates, payment reminders and two-way conversation handling with your CRM.
How do you handle API security?
Token or OAuth authentication, HTTPS enforced, per-client rate limiting, request signing for webhooks, input validation at the boundary, and no sensitive data in logs. Credentials live in environment configuration, never in the repository.
What if the third-party API changes?
Integrations are written against a versioned contract with monitoring on failure rates, so breakage surfaces immediately. Maintenance retainers cover adapting to provider changes, which for major gateways happens roughly annually.
Can you document an API we already have?
Yes. I can reverse-document an undocumented API into an OpenAPI specification with a Postman collection and examples, which is often the first step before onboarding partners or a new development team.
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Ready to start your api & integration project?

Tell me what you are trying to build or fix. You will get an honest opinion, a written scope and a fixed price — with no obligation to go ahead.

Get a free quote +91 766-599-1888

Reply within one working day   Fixed written quote   You own the code