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Backend & API engineering

APIs designed to be consumed, not reverse-engineered. We build FastAPI and Node services with typed schemas, OpenAPI documentation, authentication and rate limiting, background workers for the slow work, and structured logs and traces so production problems are diagnosable.

Scope this projectBook a 30-min call3–10 weeksPackages from $114

What you get

The outcomes we hold ourselves to on this work. If we cannot commit to them for your project, we say so during scoping rather than after the invoice.

  • OpenAPI docs generated from the code, always current
  • Auth, roles and rate limiting handled at the edge of the service
  • Long-running work moved to queues, not held in request handlers
  • Traces and structured logs that shorten incident response

Deliverables

Everything on this list is handed over and documented. Anything outside it is quoted before it is built.

  • REST or GraphQL API with versioning strategy
  • JWT / OAuth2 authentication and RBAC
  • Background jobs and scheduled tasks
  • Third-party integrations and webhook endpoints
  • Integration test suite and CI gate
  • Observability: logs, metrics, traces, alerts

Typical timeline

Most engagements of this type run 3–10 weeks end to end. Step four absorbs the difference between the short and long end of that range.

  1. Discovery call

    30 minutes, free

    We walk through what you are building, who it is for, and what has to be true for the project to count as a success. You leave with a rough scope, a rough number and an honest read on whether we are the right team.

    You receive: Written scope summary within 24 hours

  2. Proposal & fixed scope

    2–3 days

    A written proposal: milestones, deliverables, timeline, price and explicit exclusions. No hourly surprises — you approve a scope, and changes to it are quoted before any work starts.

    You receive: Proposal, contract and milestone schedule

  3. Architecture & design

    Week 1

    Data model, API contracts and infrastructure plan on paper before code. UI work starts in Figma so you approve screens rather than reviewing half-built pages.

    You receive: Architecture doc, ER diagram, approved designs

  4. Build in weekly sprints

    Bulk of the project

    Working software every week on a staging URL you can click through. A short written update each Friday: what shipped, what is next, anything blocking. You are never guessing where the project stands.

    You receive: Staging environment, weekly demo and written update

  5. Test, harden & launch

    Final 1–2 weeks

    Automated tests in CI, load and failure-path testing, security review, performance budgets, then a rehearsed deploy with a rollback plan. Launch day is uneventful by design.

    You receive: Test suite, CI pipeline, production deployment

  6. Handover & support

    Ongoing

    Documentation, a recorded walkthrough and a 30-day warranty on everything we shipped. If you want us to keep operating it, a maintenance retainer picks up from there.

    You receive: Docs, walkthrough video, 30-day warranty

Questions we get asked

FastAPI or Node?
FastAPI when there is data, ML or Python tooling in the picture, and for teams that already write Python. Node when the team is TypeScript-first and you want one language across the stack. We recommend, you decide.
Can you document an API we already have?
Yes — we add schema definitions, generate OpenAPI output and produce a consumer-facing reference with examples.
Related work

Where this has shipped

Case studies with the numbers we measured, including the ones that did not move.

Car rental homepage with a 'Plan Big on Our Rental Service' hero, a red hatchback, and a 'Book a Car' form with car type, pick-up and drop-off location and date fields.
Web app2026

AK Car Rental

A car rental booking platform — accounts, a vehicle catalogue, and a booking form that captures type, locations and dates in a single pass.

Client projectRead case study

AC repair service website with call-for-service numbers in the header, a hero photograph of a technician servicing an air conditioner, and a 'Book Service Now' form with name, mobile number and location fields.
Business site2025

MHB AC Repair & Services

A service business site built around one job: turn a visitor into a booked call-out, on a phone, in under a minute.

Client projectRead case study

Clothing e-commerce homepage with a dark editorial hero collage, a cart counter in the navigation, and a 'Best Sellers' product carousel.
E-commerce2024

Fashion Storefront

A clothing storefront with category browsing, a cart that survives navigation, and a best-sellers carousel on the landing page.

Client projectRead case study

All case studies
Other services

Usually paired with this

Most projects combine two or three of these. We scope them as one engagement rather than separate invoices.

End-to-end web applications

Full product builds — from empty repo to live, monitored deployment.

4–12 weeksFrom $96

Android & iOS applications

Cross-platform mobile apps that ship to both stores from one codebase.

6–16 weeksQuoted per project

RAG systems & knowledge assistants

Retrieval pipelines that answer from your data, with citations.

3–10 weeksFrom $108

Back to all services

Need backend & api engineering?

Tell us what you are working with — existing code, a blank repo, or a deadline you are worried about. Packages for this start at $114, and anything outside them gets a written scope and a number within 24 hours.

Start a projectBook a 30-min call

Replies within 4 business hours · No obligation · You keep the scope document