REST APIs
Server endpoints the frontend can call for bookings, catalogues, accounts, and operational data.
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APIs, data, and business logic for web products
Backend Development Services for Scalable Applications
Backend development for custom web applications: server-side logic, REST APIs, databases, authentication, and third-party integrations. We are an India-based team working with businesses worldwide.
What we buildWhat we
What we
build
The server-side work a web application needs to store data, handle accounts, and talk to other systems.
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Database integration
PostgreSQL or MongoDB where the product needs durable records — as on our booking, store, and healthcare work.
Authentication
Sign-in and protected areas when users or staff need accounts. Scoped to the product, not generic security slogans.
Business logic
Rules for availability, orders, enquiries, and workflows so the application does more than store rows.
Third-party integrations
Payments and maps when they are in scope — Stripe and Google Maps appear in our shipped products.
Admin-side data
APIs and data models that power staff dashboards — for example bookings and enquiries on our travel platform.
Why FastUI Labs
Why FastUI Labs
Backend work that matches a real product, not a microservices pitch deck.
Tied to the frontend
We build the API the interface actually needs, not an abstract platform nobody uses.
Stacks we have shipped
Node.js with PostgreSQL or MongoDB, plus AWS or Vercel for hosting where that fits.
Integrations with a job
Payments, maps, and store platforms when the product requires them — not a list of logos.
Clear data ownership
You know what is stored, who can change it, and how staff use it after launch.
Maintainable structure
Straightforward services another engineer can extend. We do not claim Kubernetes-scale platforms we have not shipped.
India-based, worldwide
English-language delivery for clients wherever they operate.
Process
How we build backends
The same six steps, applied to APIs, data, and integrations.
Discovery
We learn the workflows, records, and systems the backend must support.
Planning
We map entities, endpoints, auth, and which integrations belong in the first release.
UI/UX Design
We align API contracts with the screens and admin tools that will use them.
Development
We build the server logic, database, and integrations the scope includes.
Testing & QA
We check the flows that write and read data before anything goes live.
Launch & Support
We deploy, hand over access, and stay available for fixes and the next endpoints.
Technologies we use
Modern tools we use to design, build, and ship reliable digital products.
FAQFrequently Asked
Frequently Asked
Questions
Straight answers about scope, process, timelines, and how we work with clients worldwide.
Server-side logic, REST APIs, database work, authentication when needed, and integrations such as payments or maps. The exact stack is agreed after discovery.
Often yes. We need to see the current API, database, and constraints first. We will tell you what we can take on and what would be a rebuild.
Those are not in our published work. We ship Node.js APIs with PostgreSQL or MongoDB, and we do not list other backends as expertise.
Yes. FastUI Labs is based in India and serves businesses worldwide.
Email hello@fastuilabs.com or use the contact form with what the application must store and which systems it should talk to.
Need a Backend for Your Product?
Tell us what the application must store and connect to, and we'll help you plan the API and data model. Or email hello@fastuilabs.com.
