API Development & Integration services
Most business software isn't one system. It's the connections between them. We build the APIs and integrations that make your tools act like one system: orders flowing to accounting, leads flowing to the CRM, webhooks flowing both directions.
What we build with api development & integration
Custom REST APIs
Documented endpoints with an OpenAPI spec served live, the contract everything else builds against.
Webhooks both ways
Inbound endpoints that turn external events into actions, and outbound webhooks that push your data to other tools.
Payments & billing
Stripe, Polar.sh and COD flows: checkout, subscriptions, seat pricing and refunds handled server-side.
Business-tool integrations
QuickBooks, Xero, WhatsApp Business, email providers, CRMs, data entered once, correct everywhere.
Auth & access control
JWT, OAuth, token-gated endpoints and per-role permissions, security enforced at the API layer.
How we work
Discovery
We map how the work actually moves today, tools, handoffs, bottlenecks, before proposing anything.
Scope & fixed quote
You approve a written scope and a fixed price. The number on the proposal is the number on the invoice.
Design
Screens, flows and structure designed around the people who'll use them, not a generic template.
Build in weekly increments
Working software you can click through every week. No six-month black box.
Test & launch
Real-data testing, staged rollout, data migration and team walkthrough before go-live.
Maintain & improve
Post-launch support included, then ongoing maintenance or the next phase when you're ready.
Technologies we work with
Where api development & integration fits
- A public API for your SaaS product
- Syncing orders, invoices and customers with accounting
- Turning a contact form into a pipeline entry automatically
Relevant work
Keynou Flow
A real-time Kanban workspace, boards, cards, checklists, comments and live presence, built as a free-first alternative to heavyweight task tools.
Read the case study
Grevent
A professional networking platform where people and companies share updates, build rich profiles, message in real time and sell gated content, the social graph, the commerce and the payouts in one system.
Read the case studyMore web development services
- Web Development overview : the full web development practice.
- Web Application Development : Dashboards, portals and internal tools with real business logic.
- React Development : Interactive web apps and SaaS front-ends built on React.
- Next.js Development : Server-rendered, SEO-ready sites and apps on Next.js.
- Django Development : APIs, admin and business logic on Django & DRF.
- Node.js Development : APIs, tooling and real-time services in Node.js.
- Website Maintenance : Updates, monitoring and improvements on a fixed rhythm.
Related services
- Mobile App Development : Android and iOS apps: offline-first, store-ready, one codebase.
- UI/UX Design : Product design and interfaces users understand instantly.
- E-commerce Development : Custom storefronts and commerce platforms that convert.
- SaaS Development : Subscription products from MVP to multi-tenant scale.
- Custom Software Development : Internal systems, portals and tools built around your actual workflow.
- SEO : Technical SEO, content and audits that turn search into a channel.
Frequently asked questions
Can you integrate with software we already use?
If it has an API or webhooks, yes, QuickBooks, Xero, Stripe, WhatsApp, email providers and most SaaS tools. Where no API exists, we design around it honestly.
Who owns the API?
You do. It's your codebase, documented with an OpenAPI spec. Any future developer or partner can build against it.
How do you keep integrations reliable?
Retries with idempotency keys, webhook signature verification, and dead-letter handling. A failed sync surfaces with a reason instead of silently dropping data.
Need api development & integration?
Tell us what you're building or what should stop being manual. We'll scope it and quote it fixed. Reply within one working day.