About the role

Role overview

Jump is hiring a Senior iOS Engineer to help build and evolve its mobile apps. You’ll be an early member of the mobile team, contributing hands-on to core features, architecture, and technical direction as the product scales.

What you’ll do

Own end-to-end development for key mobile features from concept through deployment
Debug and resolve issues across shared platform code (Kotlin) and native iOS code (Swift)
Write clean, maintainable, well-documented code with robust unit tests
Partner with product managers and designers to deliver thoughtful, fan-facing experiences
Identify and implement improvements to optimize performance, stability, and scalability
Share iOS expertise and strengthen a culture of knowledge sharing and continuous improvement
Use AI-assisted tooling to prototype, refactor, and analyze performance issues, validating via testing and code review

What you’ll bring

5+ years of hands-on experience shipping high-quality mobile applications
Strong proficiency in Swift
Experience using or interest in learning Kotlin / Kotlin Multiplatform (KMP)
Ability to architect mobile apps and make sound technical tradeoffs
Experience with consumer-facing mobile apps used by engaged audiences
Detail-oriented testing practices (unit, integration, performance)
Experience using AI-assisted development tools (code generation/debugging/review) with an understanding of strengths/limitations

Nice to have

GraphQL (e.g., Apollo)
CI/CD tooling (e.g., CircleCI)
Experience with multi-tenant and/or white-label mobile apps

About Jump

Jump builds an end-to-end fan engagement platform for sports teams and venues, helping unify ticketing, merchandise, and game-day operations. Founded in 2021, it supports teams across major women’s and men’s leagues and has raised substantial venture funding to power fan-facing experiences.