Nairobi, Kenya

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Auto Dev Labs

API Development & Systems Integration

Making separate systems agree with each other.

Integration work is where most projects quietly go wrong: two systems hold the same record differently and nobody owns the difference. We design the contract between systems first, handle the awkward parts — retries, duplicates, partial failures — and document the API so the next team does not have to guess.

Discuss this project All services

Typical investment

KES 90,000 – 900,000

Per project

A single M-Pesa STK Push against an existing system sits at the floor. Multi-system integrations with reconciliation, retries and audit logging sit near the top.

The band narrows to a single fixed price in a signed statement of work before any work begins. See bands for every service.

What you get

Deliverables, not adjectives

These are the items written into the statement of work. Anything you need beyond them is quoted separately rather than assumed.
  • API design and documentation, published as an OpenAPI specification
  • Authentication, rate limiting and versioning built in from the start
  • Integrations with third-party services: payments, messaging, logistics, accounting
  • Connections into legacy or on-premise systems, including database-level where needed
  • Idempotency, retry and reconciliation handling so duplicates cannot pile up
  • A test suite and a sandbox environment your team can develop against

Good fit for

Is this the right service?

If none of these describe your situation, say so on the call — we would rather redirect you than take on work that is a poor fit.
  • Companies whose systems each hold a slightly different version of the truth
  • Products that need to expose an API to partners or clients
  • Anyone integrating payments, SMS or logistics providers properly

Technologies

The ecosystems we work in

Read these as options our engineers are experienced with, not a fixed stack. The actual choice is made with you during scoping, based on what you already run and who will maintain it afterwards.

API styles

RESTGraphQLgRPCWebhooksOpenAPI

Payments & messaging

M-Pesa DarajaStripePaystackAfrica's TalkingTwilio

Middleware

Message queuesEvent streamingETL pipelinesAPI gateways

Assurance

Contract testingSandbox environmentsRequest logging

How we work

From first call to handover

  1. 01

    Discovery call

    A free 30-minute conversation about the problem, the constraints and the budget range. If we are not the right fit, we say so on this call.

  2. 02

    Scope & written quote

    We define what the first release includes and excludes, then quote it as a fixed price in a statement of work you can take to procurement.

  3. 03

    Design & architecture

    Screens and data model agreed before the build. Changing a diagram is cheaper than changing a shipped feature.

  4. 04

    Build in increments

    Short cycles with something reviewable at the end of each. You see progress in a working environment, not in a status report.

  5. 05

    Test & launch

    Functional, performance and security checks, a staged rollout with a rollback path, and a launch date agreed rather than announced.

  6. 06

    Handover & support

    Documentation, training and code in a repository you own — followed by a support retainer if you want us to keep it running.

Questions

What buyers ask before signing

Can you integrate a system with no API?

Usually. Depending on what the vendor allows, that means a database-level integration, a scheduled file exchange, or a controlled scraping layer. We are clear about the fragility of each option before you choose.

Who holds the API credentials?

You do. Accounts are created in your company's name and secrets are stored in a managed secret store, never in the codebase.

How do you prevent duplicate transactions?

Idempotency keys on every write, plus reconciliation jobs that compare both sides and report differences rather than silently correcting them.

Often combined with

Workflow Automation with n8n

Automating the copy-paste work between the tools you already pay for.

Read more

Custom Software Development

Software built around how your business actually works.

Read more

Cloud Services & DevOps

Infrastructure that can be rebuilt from code, and deployments that are boring.

Read more

Let's scope your apis & integration work

Tell us the problem and the constraints. You get a written scope and a fixed price within three working days — or an honest note that this is not something we should take on.

Request a proposal