Hiring Flutter Developers: What to Check Before You Commit

Flutter makes the first screens fast to build, which is exactly why a portfolio of screens tells you little. The difference between a developer who builds demos and one who ships products shows up later: in state that stays consistent, in platform code that survives an OS update, in a release that passes review on the first try. These are the things worth checking.

State management, and why they chose it

Ask which approach they use (Riverpod, Bloc, Provider or something else) and, more usefully, why. A good answer talks about the shape of the app: how much shared state there is, how it is tested, what happens when two screens edit the same thing. A weak answer names a package and stops. There is no single correct choice; there is a correct habit of choosing for a reason.

Code that leaves Dart

Real apps reach the platform: payments, notifications, background work, Bluetooth, deep links, the camera. Ask what they have written or fixed in Swift or Kotlin through platform channels, and what broke when iOS or Android changed underneath them. A developer who has only ever used plugins is fine until the plugin is abandoned, which in a long-lived app eventually happens.

Release experience

Building an app and shipping it are different skills. Ask:

• Which apps have they taken through App Store and Play Store review themselves, and what was rejected?
• How do they handle signing, build numbers and staged rollouts?
• How do they ship a fix when a release crashes for some users?

Someone who has done this will have specific stories. Someone who has not will describe the documentation.

Tests that exist for a reason

Ask what they test and what they deliberately do not. Widget tests on critical flows (sign-in, checkout, anything involving money) and unit tests on business logic are a good sign. One hundred percent coverage claims are not; neither is "we test manually before release".

Performance on real devices

Flutter performs well when it is used well. Ask how they find jank, whether they profile on a mid-range Android phone rather than the newest iPhone, and how they keep app size in check. The users who leave because the app is slow are usually on hardware the developer never tried.

How they handle what they do not know

Give a small, real problem from your product and ask how they would approach it. You are not looking for the right answer on the spot. You are looking for good questions, an honest "I would need to check", and a plan for finding out.

A practical way to decide

Interviews tell you about communication; delivery tells you about engineering. A short, paid piece of real work, with a defined outcome and code review on your side, is the most reliable test there is.

These are the same things our own apps on the App Store demand of us with every release. If you are looking for Flutter, native iOS or Android engineers, here is how we work with teams, and our comparison of Flutter and React Native may help if the framework is still open.