Flutter Developers in the US

About Flutter Developers

Hire senior Flutter developers who build iOS and Android from a single Dart codebase, wire up the backend, push, and offline sync, and ship to both app stores. We are a small senior team in Noida, so you work directly with the engineer on your app, not an account-manager layer. Flat quotes, a written scope before any code, and your source in your own repo from day one.

What the engagement includes

• Senior engineers on your app from day one, with direct access to the person writing the code. No junior offshore pool behind an account manager relaying your questions.
• Flutter is in our real production stack, with two live apps shipped for Jai Shri Balaji Store, so a dedicated developer here is not learning the framework on your timeline.
• One codebase for iOS and Android, with both stores handled end to end: signing, listings, screenshots, data-safety declarations, and the review back-and-forth.
• Flat INR quotes on GST-compliant invoices for Indian clients, and USD, CAD, GBP, or AED via Wise for overseas teams, with W-8BEN and LUT on file.
• 70 plus projects shipped in total across all our work, for clients in India, the US, UK, Canada, and the UAE, so a launch is routine for us.
• You own the source code, the GitHub repo, and the App Store and Play Console accounts, all in your business name. Clean exit, no lock-in, 24-hour response.

Health data consent, biometric releases and the FFIEC's authentication guidance in a US Flutter app

A Flutter app that reads step counts, heart rate or sleep from HealthKit or Health Connect, usually through the community health plugin, is collecting consumer health data under Washington's My Health My Data Act the moment it reads them. The Act defines collecting to include accessing and processing, and its list of health data covers bodily functions, vital signs, symptoms and measurements, biometric data, and information inferred from other data. It protects Washington residents and anyone whose health data is collected in Washington, and it has applied since 31 March 2024, or 30 June 2024 for small businesses. The operating system's permission sheet does not satisfy it. Unless the data is necessary to provide the service the consumer asked for, the app needs consent for collection that is a clear affirmative act, given before collection, naming the categories of data, the purpose and specific uses, the categories of entities it is shared with and how to withdraw. Sharing needs a second consent, separate from the first, and selling needs a signed authorization naming the buyer, which expires after one year and cannot be combined with any other document. Consent cannot come from accepting general terms of use, and a violation is an unfair or deceptive act under the state's Consumer Protection Act, which is what opens the door to consumers' own lawsuits. Two things follow for a Flutter build. The consent screens are Flutter screens shown before the first health query, with a stored record per purpose, rather than a line in onboarding that leans on the HealthKit dialog. And every analytics, crash reporting and attribution package in pubspec.yaml is checked for whether it receives health-derived events, because sending a workout-completed event to a third party can be sharing that needs the second consent unless that vendor acts as your processor within the disclosed purpose. Whether your app is covered, and what counts as necessary, is for your own counsel.

Face features are where the plugin choice decides the law. Flutter's local_auth plugin sits on Apple's LocalAuthentication framework and Android's biometric prompt, and Apple's documentation says the app never gains access to the underlying data and receives only a Boolean result, so signing in with Face ID puts no face template in your hands. A selfie check for identity verification is different: a camera plugin plus a face matching library, or a vendor SDK that uploads the image, produces data derived from the geometry of a face. Google's ML Kit says its face detector returns contours and landmarks but does not recognize people, while a matching service exists to identify, and Illinois and Colorado draw lines in those terms. Illinois' Biometric Information Privacy Act covers a scan of face geometry and requires written notice of the purpose and retention term, a written release, which since 2 August 2024 can be an electronic signature, and a public retention schedule that destroys the data once its purpose is met or within three years of the last interaction, whichever comes first. Liquidated damages are $1,000 for each negligent violation and $5,000 for each intentional or reckless one, and the 2024 amendment counts repeated collection from the same person by the same method as a single violation. Since 1 July 2025 Colorado's privacy act has reached any controller holding biometric identifiers, whatever its size, requiring a written policy, an incident protocol and deletion within 24 months of the last interaction at the latest, and its definition leaves out photographs unless they are used for identification. BIPA does not apply to a financial institution subject to the Gramm-Leach-Bliley Act, so the same feature can be regulated in a fitness app and exempt in a bank's. Face data stays on the device wherever the feature allows, and where a vendor match is unavoidable the release screen and the deletion job ship with it. Whether a feature collects a biometric identifier is for your own counsel.

For a bank or credit union, the sign-in design of a Flutter app is read against the FFIEC's guidance on authentication and access to financial institution services, announced on 11 August 2021, which replaced the 2005 internet banking guidance and its 2011 supplement. It is risk-based rather than prescriptive, but it is the document the institution's own reviewers will hold the app against, and several of its observations land directly on mobile code. It says single-factor authentication, alone or with layered security, has proved inadequate in many situations, that multi-factor authentication or controls of equivalent strength are warranted where the risk assessment calls for them and for high-risk transactions, and that some factors are open to man-in-the-middle attacks, giving the example of a one-time code sent to a customer being intercepted. Among the controls it lists is device-based public key authentication, in which a PIN or biometric on the device triggers a cryptographic exchange with the institution, and it calls device identifiers such as cookies, geolocation and IP address matching insecure and ineffective if used alone. In a Flutter app that points to a specific architecture: a key pair generated in the Secure Enclave or Android Keystore at enrollment and released by the platform biometric prompt through a plugin, a server that verifies a signature rather than trusting a code typed back from a text message, and platform attestation where the institution wants assurance that requests come from its genuine app. Behavioral biometrics, which the guidance also lists, usually arrive as third-party SDKs that capture swipes, taps and keystrokes, so whoever adds one should tell the privacy team as well, since the same data can count as biometric under state law. The guidance also expects customer awareness material to change as services change, so the in-app security copy is a maintained screen rather than launch text. Which controls your risk assessment calls for is for your information security officer.

How we work with US clients

A US engagement gets agreed twice. Once with the person who wants the thing built, and then again with legal, security, procurement and finance, who arrive separately and rarely in the same week. That second round is where a supplier outside the country loses the calendar: a master services agreement to redline, a security questionnaire, a certificate of insurance, and a vendor portal that assumes everyone it onboards can sign a W-9. Send all of it while the scope is still being written rather than in the week you wanted to start, and where the honest answer to a row is that we do not hold something, we write that in rather than leaving it blank.

You are also buying from a company you cannot drop in on, so the evidence has to do the work an office would otherwise do. What we send is live production URLs rather than a deck, a written scope with one fixed number against it, and the names of the people who will do the work rather than a bench that changes after signature. What we will also tell you is the shape of what you are hiring: a small team in Noida that has been building since 2021, not a firm that can put four more people on your project next Monday. If that is what your timeline needs, we say so before the contract rather than after it.

Questions US clients ask

Flutter Developers: common questions

Other markets we work in