REST and GraphQL APIs
Well-designed APIs for your website, apps and partners, with clear documentation.
APIs and backends that stay fast under real traffic.
Secure APIs, payments and integrations for your website, app or internal tools, documented properly and built to handle sale days without breaking a sweat.
From £6,000
Why it matters.
Most of what makes software useful happens where customers can't see it: taking payments, syncing stock, sending reminders, keeping data safe. When that layer is slow or fragile, everything built on top of it suffers.
We design and build backends that are secure by default, documented so any developer can pick them up, and tested against real traffic before launch. We connect the tools you already use, from Stripe and Xero to your booking or practice system.
Data stays in UK or EU regions unless you tell us otherwise, and we sign a data processing agreement with every client.
What we do.
Everything you need, from the first design to launch and beyond.
Payments
Stripe checkouts, subscriptions, deposits and refunds that reconcile cleanly.
Integrations
Connect your CRM, accounting, booking or stock systems so data flows automatically.
Databases
PostgreSQL schemas designed for your data, with backups and migrations handled.
Authentication
Secure sign-in, roles and permissions, including single sign-on for teams.
Background jobs
Emails, reports, reminders and imports that run reliably on a schedule.
What you get.
The difference a senior team makes.
Secure by default
Encrypted data, least-privilege access and dependency checks on every release.
Fast under load
Load-tested before launch, with caching where it counts.
Properly documented
Every endpoint documented, so your team or another agency can build on it.
Easy to extend
Clear structure and tests make new features quicker and safer to add.
Tools we use.
Proven technology that will still be supported in five years.
- Node.jsBackend
- TypeScriptLanguage
- PythonBackend
- LaravelBackend
- PostgreSQLDatabase
- RedisDatabase
- GraphQLAPIs
- StripePayments
How it runs.
Five steps, a fixed price and a demo every week.
Discovery
We map your data, the systems you need to connect and what happens when things go wrong. You get a fixed quote.
Typical length3 to 5 days
Your time2 to 3 hours
What you get
- Integration map
- Fixed quote and timeline
- Security and data plan
Related work.
Recent backend and api development projects for London businesses.
Your project could be next.
Tell us what you're planning and get a fixed estimate within one working day.
Projects and pricing.
What clients most often build with us, and where prices start.
Typical projects
What clients most often ask us to build.
- Online ordering and checkout
- Booking and appointment systems
- Syncing stock across channels
- APIs for mobile apps
- Connecting a practice or CRM system
- Automated reports and invoices
Starting price
from£6,000
A focused API or integration. Larger platforms are quoted after discovery.
Questions, answered.
Can't find what you need? We reply within two working hours.
hello@pixarbyte.co.ukor call +44 20 0000 0000
Can you work with our existing frontend or app?
Yes. We regularly build APIs for websites and mobile apps made by other teams, and agree the API contract with them first so nobody is waiting.
Which payment providers do you support?
Mostly Stripe, which covers cards, Apple Pay, Google Pay, subscriptions and deposits. We've also integrated GoCardless, PayPal and Adyen.
How do you keep data secure?
Encryption in transit and at rest, least-privilege access, audited dependencies and regular backups. We host personal data in UK or EU regions and sign a data processing agreement.
Will we get documentation?
Yes. Every endpoint is documented with examples, and the code, database and infrastructure are handed over in your own accounts.
Can you take over an API someone else built?
Yes. We start with a fixed-price audit so you know what you have, what needs fixing and what it will cost before we change anything.
“Deadlines met, weekly demos and zero surprises on the invoice.”
Hina KhanOperations Lead, Meridian Health
Ready to start your backend and api development project?
Tell us what you're planning. You'll get a clear estimate and a plan within one working day, free and with no obligation.
hello@pixarbyte.co.ukReplies within 2 working hours
+44 20 0000 0000Mon to Fri, 9am to 6pm
London, United KingdomMeetings by appointment