How to choose a developer for an integration that won't break

The biggest mistake when hiring for API integration is treating it like a commodity hire. You pick someone without checking their track record, brief them loosely, and hope it works. What you get is something that technically connects but fails silently six months later when the third-party API updates, or it leaks data, or it overloads your database every evening. The cost of that mistake always exceeds the upfront savings.

Choosing the right developer for integration means identifying who will think past "making it work" to "making it survive contact with reality." That skill set is narrower than general development, and spotting it requires asking the right questions—before you're in too deep.

Experience with your specific third party

A developer who has integrated the same service before—Shopify, Xero, WhatsApp Business API, Stripe, or whatever you need—has already made and learned from the mistakes you want to avoid. They know the API's quirks, its rate limits, its common failure modes, and how it behaves under load.

When you interview candidates, ask them directly: have you built an integration with this API before? How many times? If yes, ask what went wrong, how they fixed it, and what they'd do differently. If they can't give specifics about what went wrong or how they fixed it, that vagueness is what will cost you in troubleshooting—regardless of their rate.

If no candidate has done that exact integration, ask whether they've worked with similar architectures—REST vs GraphQL, webhooks vs polling, OAuth flows. The patterns repeat. But "similar" is not the same as your third party, so treat it as a weaker signal and factor that into your assessment.

How they think about failure modes

Integrations break because the other system is down, the API changed, a timeout happened mid-request, or your data doesn't match what the API expects. A developer who asks you about your plan for these scenarios—before you've even asked them—is worth listening to.

Listen for whether they mention:

• Idempotency (so retried requests don't duplicate data)
• Logging and monitoring (so you know when it breaks)
• Rate limits (and how they'll handle hitting them)
• Error handling (what happens when the API says no)
• Rollback or rollback testing (what if the data's wrong)

If they sketch these out unprompted, they're not just shipping code; they're shipping something that won't wake you up at 3 a.m. in six months. Developers who skip this thinking—regardless of what they charge—tend to cost more later, once problems surface in production.

Proof they've documented their work

An integration lives for years, often touched by someone who isn't the original builder. A developer who provides clean documentation—what the integration does, how to monitor it, how to update it when the third-party API changes—is saving you money on future maintenance.

Ask to see an example of documentation from a past project. Does it explain the flow? Does it list the dependencies? Can a different developer read it and understand what's happening? If they say they don't usually document, that's a red flag—verify by asking to see a real example before you decide. Integration work demands it more than most development, because the integration is literally the bridge between two systems you don't fully control.

Communication and testing clarity

The developer who communicates well during the build—checking assumptions, walking you through decisions, asking what success looks like—will deliver something closer to what you need. They'll also spot scope creep or gaps before they become expensive problems.

Before hiring, have them explain how they'd test your specific integration. What environment would they build in? How would they test without touching production? Do they propose building alongside you, or in isolation? Isolation is fine, but they should have a clear handover plan so you both know what "done" means.

The developers worth hiring are those who ask more questions than they answer in early conversations, and who treat the API documentation not as optional reading but as gospel. They think like operators, not just coders, and that shows up in the questions they ask before any code is written. On Strove, you can ask to see past integration projects and read what clients say about their communication—that's where the real signal lives.

Choosing on depth of integration experience, failure planning, documentation habit, and clarity of testing separates the builders who ship once from the ones who ship and stay standing.