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Freelance Flutter App Developer Jobs in California

Sekai

Founding iOS Engineer

San Francisco, CA · On-site

$61 - $84/hr

About the Role We are looking for a Senior iOS Engineer to own Sekai's iOS app and help us build a ... Experience with React Native, Flutter, WebView, or other hybrid mobile architecture * Familiarity ...

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Helix AI Engineer, iOS

San Jose, CA · On-site

$200K - $400K/yr

The app pairs with proprietary hardware and will ingest high volumes of data. You'll be the ... Cross-platform experience (React Native, Flutter, or KMP). * Experience with Apple's MFi (Made for ...

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Helix AI Engineer, Android

San Jose, CA · On-site

$200K - $400K/yr

The app pairs with proprietary hardware and will ingest high volumes of data. You'll be the ... Cross-platform experience (React Native, Flutter, or KMP). The US base salary range for this ...

Figure

Helix AI Engineer, iOS

San Jose, CA · On-site

$200K - $400K/yr

The app pairs with proprietary hardware and will ingest high volumes of data. You'll be the ... Cross-platform experience (React Native, Flutter, or KMP). * Experience with Apple's MFi (Made for ...

Figure

Helix AI Engineer, Android

San Jose, CA · On-site

$200K - $400K/yr

The app pairs with proprietary hardware and will ingest high volumes of data. You'll be the ... Cross-platform experience (React Native, Flutter, or KMP). The US base salary range for this ...

Info Way Solutions

Swift UI Programmer

Cupertino, CA · On-site

... app lifecycle, memory management, and concurrency • Experience with Auto Layout and responsive ... g., Flutter, React Native) • Knowledge of unit testing frameworks like XCTest • Experience ...

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Freelance Flutter App Developer information

What does a freelance Flutter app developer do?

A Freelance Flutter App Developer designs, builds, and maintains mobile applications using the Flutter framework, which allows for cross-platform development on both iOS and Android. They typically work independently or with clients on a contract basis, handling tasks such as coding, debugging, UI/UX design, and integrating APIs. Their role often includes collaborating with designers or project managers to deliver customized app solutions that meet specific client requirements. Freelance Flutter developers must stay updated on the latest Flutter updates and best practices to ensure high-quality, performant apps.

What are some common challenges faced by freelance Flutter app developers, and how can they be addressed?

Freelance Flutter app developers often encounter challenges such as managing multiple client expectations, keeping up with frequent framework updates, and ensuring cross-platform consistency. To address these, it's important to maintain clear communication with clients, set realistic timelines, and allocate time for ongoing learning. Leveraging version control and thorough testing across devices can also help deliver high-quality apps and build a strong reputation in the freelance market.

What are the key skills and qualifications needed to thrive as a freelance Flutter app developer, and why are they important?

To thrive as a Freelance Flutter App Developer, you need a solid understanding of Dart programming, mobile app development principles, and experience building cross-platform applications with Flutter. Familiarity with tools like Android Studio, Xcode, Git, and relevant app store deployment processes is typically required, and certifications in Flutter or mobile development can be advantageous. Strong problem-solving, self-management, and client communication skills help freelancers efficiently handle projects and build lasting relationships. These skills and qualities are crucial for delivering high-quality apps, managing multiple projects, and succeeding in a competitive freelance market.

What is the difference between Freelance Flutter App Developer vs Mobile App Developer?

AspectFreelance Flutter App DeveloperMobile App Developer
CredentialsTypically self-taught or with certifications in Flutter or mobile developmentOften holds degrees or certifications in mobile app development or related fields
Work EnvironmentIndependent, project-based, remote or on-siteEmployed by companies, agencies, or as in-house staff
Industry UsageFreelance market, startups, small businessesTech companies, enterprises, large organizations
Search & Comparison IntentLooking for freelance opportunities or hiring freelancersHiring or understanding roles in mobile app development

Freelance Flutter App Developers work independently on projects, often remotely, focusing on Flutter-based mobile apps. Mobile App Developers may work in-house or for agencies, with broader expertise in multiple platforms. Both roles require similar technical skills, but their work settings and employment types differ significantly.

What are the most commonly searched types of Flutter App Developer jobs in California?

The most popular types of Flutter App Developer jobs in California are:

What are popular job titles related to Freelance Flutter App Developer jobs in California?

For Freelance Flutter App Developer jobs in California, the most frequently searched job titles are:

What job categories do people searching Freelance Flutter App Developer jobs in California look for?

The top searched job categories for Freelance Flutter App Developer jobs in California are:

What cities in California are hiring for Freelance Flutter App Developer jobs?

Cities in California with the most Freelance Flutter App Developer job openings:

Freelance Flutter App Developer jobs near you
Infographic showing various Freelance Flutter App Developer job openings in California as of August 2026, with employment types broken down into 55% Full Time, 39% Part Time, and 6% Contract. Highlights an 97% Physical, 1% Hybrid, and 2% Remote job distribution.

Senior Mobile Infrastructure Engineer, Ambient AI

Athelas

Mountain View, CA • On-site

Full-time

Re-posted 2 days ago

Job description

Job Summary:
Athelas is focused on building the AI Operating System for healthcare, aiming to transform the administrative burdens of the industry. They are seeking a Senior Mobile Infrastructure Engineer to develop their next-generation ambient AI platform, enhancing mobile applications that improve clinician workflows and patient care through advanced technology.
Responsibilities:
• Own and evolve our primarily Flutter-based mobile platform, including native Swift/iOS and Kotlin/Android integrations for audio capture, background execution, offline reliability, performance, and observability. Core areas include:
• Build and improve foundational mobile frameworks used across our apps, such as:
• Strengthen mobile reliability by systemically reducing crashes, improving release readiness, and preventing regressions before they reach clinicians.
• Partner with product, backend, AI, and design teams to understand emerging infrastructure needs and unblock fast, reliable product development.
• Help shape the technical direction for mobile architecture as we scale the Ambient AI product line.
• Contribute occasionally to adjacent surfaces such as our Chrome extension and web app, primarily where mobile, audio, AI workflow, or platform infrastructure needs intersect.
• Mentor other engineers and help raise the technical bar across mobile. There is an opportunity to grow into broader mobile technical leadership or people leadership over time, but management is not required for this role.
Qualifications:
Required:
• 5+ years of professional mobile development experience.
• Deep experience in iOS, Android, or both.
• Strong native mobile expertise in Swift/iOS and/or Kotlin/Android, including app lifecycle, background execution, permissions, performance, and platform-specific constraints.
• Experience working in, or a strong willingness to ramp into, a Flutter-based mobile codebase.
• Experience building or maintaining production-grade mobile infrastructure at scale.
• Experience working in cross-platform mobile environments, such as Flutter, React Native, Kotlin Multiplatform, shared native modules, or similar architectures.
• Strong understanding of mobile architecture, release processes, CI/CD, testing, observability, and reliability best practices.
• Experience improving app performance, crash rates, release quality, or developer velocity through platform-level investments.
• Comfort working across product, backend, design, and AI engineering teams in a fast-moving environment.
• Ownership mindset and strong bias for action.
Preferred:
• Experience with audio/video streaming, real-time media pipelines, audio chunking, transcription, or background recording.
• Experience with offline-first systems, sync engines, conflict handling, or resilient local persistence.
• Experience with mobile observability tools such as Firebase Crashlytics, Sentry, Datadog, Amplitude, or similar.
• Experience with Fastlane, Firebase App Distribution, TestFlight, Play Console automation, build optimization, or release automation.
• Experience with AI-native product experiences, real-time transcription, multimodal workflows, or agentic user experiences.
• Exposure to healthcare, HIPAA, SOC 2, security, encryption, privacy, or regulated mobile environments.
• Flutter/Dart experience, including Riverpod or similar state management patterns.
• Experience with Shorebird, CodePush, or other mobile over-the-air update platforms.
• Light JavaScript, TypeScript, Chrome extension, or web app experience.
Company:
Athelas develops technology to monitor chronically ill patients in their homes. It is a sub-organization of Commure. Founded in 2016, the company is headquartered in Mountain View, USA, with a team of 201-500 employees. The company is currently Growth Stage.

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