Service 04 of 08

API and backend development

APIs, jobs, queues, and integrations, with clean contracts and documentation.

  • Typical timeline 3 to 6 weeks
  • Fixed price per milestone
Scope

What we build

A backend is a set of promises: this endpoint returns this shape, this job runs once, this migration can run twice without damage. We design those promises first, write them down, and test them. Then we build in Node.js or Python, put a Postgres schema behind it that answers next year's questions, and load test before your users do.

  1. 01Public and partner APIs
  2. 02Mobile app backends
  3. 03Background jobs and schedulers
  4. 04Data pipelines and ETL
  5. 05Third-party integrations (accounting, CRM, email, payments)
  6. 06Webhooks with signature checks and retries
Deliverables

What you walk away with

  • 01API endpoints
  • 02Database schema and migrations
  • 03Authentication
  • 04API documentation
  • 05Load test report
  • 06CI/CD pipeline

Typical timeline

3 to 6 weeks

Ranges from past projects. Your proposal states your dates.

How the weeks run

  1. 01DiscoveryDay 1 to 2
  2. 02DesignDay 3 to 5
  3. 03DevelopWeek 1 to 3
  4. 04DeployWeek 4
Tech stack

What we build it with

  • Fixed price per milestone
  • Senior review on every change
  • Your repo and accounts from day one
  • Node.js
  • Python
  • FastAPI
  • Express
  • GraphQL
  • PostgreSQL
  • Redis
  • Docker
Questions

Before you ask

What technologies do you work with?

Mostly TypeScript, React, Next.js, Node.js, Python with FastAPI, PostgreSQL, and Docker, deployed to Railway or your own cloud. React Native or Swift for mobile. Claude and OpenAI models for AI features. If you already have a stack, we usually work in it.

How do you make sure the code is good?

TypeScript or typed Python, tests on the paths that matter, CI on every branch, and a senior engineer reviewing every change before it merges. Every project ends with monitoring, error tracking, and a runbook.

Do you handle deployment and hosting?

Yes. We set up CI/CD, hosting on Railway or your preferred cloud, domains and SSL, monitoring, logging, and error tracking. Everything is in your accounts.

Can you work with my existing codebase?

Yes. We start with a code review and a ranked list of risks, then propose what to fix and what to leave alone. We keep what works.

Start with a 30-minute call

You leave with a clear plan, whether or not you hire us.