Software Engineer, Clerk
Expo/Flutter
+ Stock option plan
Identity tool for React applications
Be an early applicant
Identity tool for React applications
101-200 employees
Be an early applicant
+ Stock option plan
101-200 employees
Company mission
To solve user management so developers can stop re-inventing the wheel and focus on their core business.
Role
Who you are
- 3+ years of software engineering experience, with significant mobile development focus
- Strong experience with JavaScript/TypeScript (React Native/Expo), ideally direct experience working with Expo
- Experience building and maintaining SDKs, libraries, or developer tools
- Understanding of authentication flows, security best practices, and mobile-specific considerations
- Knowledge of authentication protocols (OAuth, SAML, JWT)
- Experience with API integration, state management, and mobile app architecture patterns
- Experience with Git, package managers (pub.dev, npm), and collaborative development workflows
Desirable
- Deep expertise in Flutter development, including Dart, widget architecture, and cross-platform considerations - if you only have light Flutter experience or intend to learn as it comes, that's ok, still apply!
- Experience with other mobile frameworks (Ionic, Electron, etc.)
- Background in developer advocacy or technical writing
- Open source contributions to mobile development projects
- Experience with native iOS (Swift) or Android (Kotlin) development
- Knowledge of backend API development and database design
- Understanding of enterprise authentication requirements (SSO, SAML, etc.)
What the job involves
- We're looking for a passionate Software Engineer to take ownership of our Expo and Flutter SDKs. Our Expo SDK is already one of our most popular offerings, trusted by thousands of developers building React Native applications. Our Flutter SDK recently entered beta and is already being used in production by many customers
- As the lead engineer for these mobile frameworks, you'll be responsible for maintaining, supporting, and continuously improving these critical SDKs that enable developers to add authentication and user management to their mobile applications with just a few lines of code
- SDK Development & Maintenance
- Take full ownership of Clerk's Expo and Flutter SDKs, from architecture to implementation
- Design and implement new Clerk features that make authentication even better for mobile developers
- Maintain high code quality, security standards, and performance across both SDKs
- Write comprehensive documentation, guides, and code examples that developers actually want to read
- Developer Experience
- Collaborate with our marketing & support teams to understand pain points and feature requests
- Create sample applications and integration guides that showcase best practices
- Respond to community questions and provide technical support for SDK-related issues
- Contribute to our open-source ecosystem and engage with the developer community
- Cross-Platform Excellence
- Ensure seamless functionality across iOS, Android, and web platforms for both Flutter and Expo
- Work closely with our native iOS and Android developers to maintain consistency across all mobile SDKs
- Stay current with React Native, Expo, and Flutter ecosystem changes and updates
- Optimize for performance, security, and developer ergonomics
- Strategic Development
- Define the technical roadmap for mobile SDK development
- Evaluate and potentially lead development for additional mobile frameworks based on customer demand
- Collaborate with Product and Engineering teams to prioritize features and improvements
- Influence Clerk's overall mobile strategy based on your deep ecosystem knowledge
Our take
Authentication is only part of the story when it comes to user management. Developers using API tools also face the complex UI and management issues of additional features like user sign-up, sign-in, and session management, to name a few. Clerk was founded to make this simpler, reducing hours of work to minutes using pre-built React components.
Clerk stands out in a market dominated by the likes of Auth0 and OneSpan with its focus on React rather than API. This taps into a growing number of developers working with Jamstack rather than trying to wrestle customers away from market incumbents - a smart move which has seen its userbase swell by five times, growing to over a million developers.
This rapid growth has attracted investors, and Clerk closed a Series B round in 2024. This funding is being used to expand the company's services into authorisation - determining a user's permissions as opposed to simply identifying them. As account security and management will continue to be a major focus for developers going forward, Clerk is well positioned to grow into a major player in this space, especially as it continues to expand its product range.
Steph
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 6 rounds)
Jan 2024
$30m
SERIES B
Mar 2023
$15m
SERIES A
Total funding: $59m
Company benefits
- Stock option plan. We're all in this together!
- Gear of your choice for your home office
- Unlimited vacation policy - 25 days recommended per year plus national holidays in your country of residence. Take time when you need it
- Be part of a diverse, and exceptional team to build an impactful product for the modern web
Company HQ
Design District, San Francisco, CA
Leadership
Colin Sidoti
(Lead Clerk & Co-Founder)Previously a web developer with We-Care.com, who then moved into an independent consulting role before co-founding and serving as CTO at Harbor Inc.
Braden Sidoti
(CTO & Co-Founder)Has held various engineering and developer roles, including at Fuzz Productions, hostess.fm, and Inspirato.
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