Sincere is looking for a Senior Mobile Developer to join our growing team. In this role, you will have the opportunity to build best-in-class apps for both Punchbowl and Timehop . This is an exciting time to join Sincere. Our customer base is shifting to mobile from the web at an unprecedented rate, we have record-breaking growth among our key metrics, and an award-winning platform that’s been featured in TechCrunch, CNNMoney, Entrepreneur, WSJ, and more.

The ideal candidate has 5+ years of native app development experience working on consumer apps (ideally, subscription-based). You believe that user interface details really matter. You care about creating structured and maintainable code, and you consider development your craft.

You have:

• Strong Android development experience with Kotlin & Java
• Expert Knowledge of Android SDK and Android UI components, including JetPack Compose
• Familiarity with Swift, UIKit, and SwiftUI
• Demonstrated experience working on active apps (50k+ daily active users)
• Experience with subscription feature integration & management on Google Play Billing or StoreKit
• Proven ability to write clean, testable, and performant code
• Advanced knowledge of design principles, user interfaces, and mobile standards
• Expertise with monitoring tools like Embrace and Firebase Performance
• Excellent understanding of RESTful web services
• Ability to work in a collaborative environment, participating in pull requests and code review

Bonus points if you have:

• App development experience with both Android & iOS
• Knowledge of the Google Play release process
• Experience with A/B testing frameworks & feature flags
• Strong understanding of CI/CD tools (Github Actions, Fastlane, Firebase, Gradle)
• Proficiency with dependency injection frameworks (Dagger/Hilt)
• Experience translating requirements into user stories, proactively leading product advancements

What We Offer:

• 100% Health, Dental & Vision coverage
• 401K Plan with Profit Share
• Annual bonus potential
• Health & Wellness stipends
• Paid time off plus 12 paid holidays & Summer Fridays
• Paid parental leave
• Childcare benefits (dependent care FSA)
• Flexibility to work from wherever you will be most effective
• In-person, all-expenses-paid Team Summits (2X a year)

PLEASE NOTE : Our team is primarily based in Greater Boston. We will consider applicants who reside anywhere within a 2 hour drive of the city. While this role is remote, we have occasional in-person meetings at the office (every 4-6 weeks typically).