Cavendish
API integration services

API integrations that carry your business forward.

For agencies and software teams connecting suppliers, booking platforms and business tools. I take one critical data flow from API access to a tested production release.

Integration & Automation Sprint from US$4,000 · commonly 2–4 weeks. Unclear dependencies? Technical Discovery from US$1,500.

10+ yearsSoftware engineering experience
5 years at ViatorSupplier connectivity & marketplace systems
One senior engineerDirect access from scoping through delivery
Relevant work

Experience you can look into.

João Paulo Cavendish
João Paulo CavendishSenior software engineer · Founder

I spent five years at Viator, a Tripadvisor company, working on supplier connectivity and marketplace systems at global scale. That experience is directly relevant when integrations carry bookings, availability, payments or other business-critical data.

API integration · DOM Burguer

From restaurant orders to usable operational data.

A GloriaFood API integration, serverless reporting dashboard and customer feedback flow, used for several years at approximately 300 orders per week.

See the integration case
Agencies · Travel platforms · Product teams

An API exists. The working connection does not.

01

People move the same data twice

Orders, customers, payments or operational updates are copied between systems because the connection is missing.

02

An existing integration is unreliable

Failures are hard to spot, retries are manual, and nobody is confident that both systems agree.

03

A new vendor must fit your workflow

The vendor has an API, but your team still needs the business rules, edge cases and release work handled properly.

What you get

A working integration, not a handoff document

The exact acceptance criteria are agreed before implementation. A typical sprint takes one defined flow from the current state through production release.

  • System and data-flow map
  • Authentication and API implementation
  • Business rules, validation and error handling
  • Retries, logs and practical failure visibility
  • Test scenarios and production release
  • Technical notes and post-release support window
How it works

A clear path from question to delivery.

  1. 01

    Map the real flow

    We identify the source of truth, required data, business decisions, failure paths and dependencies.

  2. 02

    Agree on done

    You receive a fixed proposal with scope, exclusions, acceptance criteria, schedule and price.

  3. 03

    Build and release

    I implement, test and take the agreed integration through production, then review it with you.

Scope & pricing

Integration & Automation Sprint

From US$4,000

Commonly 2 to 4 weeks

Fixed price for one clearly described integration outcome. The proposal lists what will work, what is excluded, the access you provide and how we will verify delivery.

Discuss my integration

Agreed before we start

  • One bounded integration or workflow per sprint
  • Third-party access and API limits confirmed before commitment
  • No 24/7 support or responsibility for a vendor's uptime

The proposal defines the outcome, access, acceptance criteria and delivery boundary.

Before we talk

Practical questions.

Can you work with our existing software?

Yes. Most integration work connects software already in use. I first confirm the code, environments, API access and ownership boundaries.

What if the API is poorly documented?

That uncertainty is assessed before a fixed implementation promise. If it cannot be resolved quickly, I recommend a paid Technical Discovery from US$1,500.

Who does the work?

You work directly with me from scoping through release. If a specialist is genuinely needed, their role and deliverable are disclosed before work starts.

Start a conversation

Which systems need to work together?

Tell me which tools or APIs are involved, what needs to move between them and what is blocking delivery.

I will review your message and reply with questions or a suggested next step. If there is a fit, we can arrange a short call before any proposal.

Prefer email? me@cavendish.dev
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