Connect everything

API Development & Integration

I build custom REST APIs and integrate the third-party services your business depends on, so data flows automatically between your apps, payments, CRM and AI tools.

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Make your systems talk to each other

When your tools don't connect, people end up acting as the integration: exporting files, copying data and fixing mismatches. Well-built integrations remove that work, reduce errors and give you one reliable source of truth.

I have spent 10+ years building backends in Python with Django and Flask. I design clean, documented, secure APIs and build integrations that handle the hard parts: authentication, rate limits, retries, webhooks and error handling.

What I build

Custom REST APIs

Secure, documented APIs for your web or mobile app, built with Django or Flask and designed to scale.

Third-party integrations

Connect CRMs, ERPs, e-commerce platforms, marketing and accounting tools through their APIs.

Payment gateway integration

Integrate payment providers for checkouts, subscriptions, invoices and payment webhooks.

AI API integration

Add OpenAI, Claude or other AI services to your product for generation, summarisation, classification and more.

Webhooks & real-time sync

Event-driven integrations that react instantly when something changes in another system.

Legacy system connectors

Bridge older systems and databases to modern apps with custom connectors and data pipelines.

Example use cases

E-commerceOrders from your online store synced automatically to accounting and inventory systems.
Sales & marketingWebsite forms and ad platforms connected directly to your CRM.
SaaS productsAI features added to an existing product through a clean API layer.
Web & mobile appsThe complete backend API for a new web or mobile application.
OperationsManual CSV imports and exports replaced by automated, scheduled data sync.
Partners & customersA secure API so partners or customers can access your data.

How it works

1

Free consultation

Tell me about your goals and current process over WhatsApp, email or a call.

2

Plan & estimate

I propose the approach, tools and timeline, with a clear cost estimate before any work starts.

3

Build & update

I build in small steps and share progress regularly, so you see results early.

4

Launch & support

I deploy, document and hand over, and stay available for fixes and improvements.

Technologies I use

Why work with me

✓10+ years of experience

Professional Python development since 2016, with AI and machine learning work since 2019.

✓Confidential by default

Most of my client work is under NDA, which is why it isn't in a public portfolio. Your project gets the same discretion.

✓Direct communication

You work with me directly, with no account managers or middlemen, in clear English and with regular updates.

✓End-to-end delivery

From planning and development to deployment and support, one developer owns the whole solution.

★★★★★
“Chandni knew what I wanted and executed on that perfectly. She completed the job within a couple hours. Working with Chandni was a speedy process…”
Upwork client
★★★★★
“Ms Chandni was highly professional, friendly, quick in grasping the requirement and resolving the requirement asap.”
Upwork client
★★★★★
“Great at communicating and problem solving. Would hire her again.”
Upwork client · Python developer

Simple, transparent pricing

$40/hour
  • Free initial consultation
  • Clear estimate before any work starts
  • Regular progress updates
  • NDA available on request
Get a free quote

Frequently asked questions

Can you integrate with a service that has a poor or limited API?

Usually, yes. I work with whatever is available, such as REST, SOAP, webhooks or file exports, and where no API exists, automation or scraping can sometimes fill the gap.

Will the API be documented?

Yes. You get clear documentation, for example OpenAPI/Swagger, so your team or other developers can use and extend it.

How do you handle security?

Authentication (tokens or OAuth), input validation, rate limiting, HTTPS and secure storage of credentials are part of every build.

Can you work with my existing developers?

Absolutely. I can work alongside your team, follow your coding standards and hand over cleanly.

How long does an integration take?

Simple integrations can take a few days; complex multi-system projects take longer. You get an estimate after a free consultation.

Ready to connect your tools?

Tell me about your project and I'll reply with ideas, a timeline and a quote.

Get a free quote Chat on WhatsApp