Senior Full-Stack Mobile Engineer

Summary

Level is a learning technology company dedicated to helping students build real academic and life skills with confidence and joy. We combine proven curriculum principles with world class interactive design to make meaningful practice something students want to come back to, not something they struggle through.

We support what teachers, schools, and parents are already doing by increasing student engagement with high quality, standards-aligned practice that reinforces classroom learning.

As a Senior Full-Stack Mobile Engineer on the Platform team, you will own end-to-end slices of Level's mobile experience — from the iOS and Android clients through the API layer and into the services that power identity, onboarding, content delivery, and engagement on mobile devices. You'll write production native code on at least one mobile platform, work in cross-platform code where it makes sense, and design and implement the backend services that sit behind them.

We are hiring senior engineers specifically because we want people who can move fluently across the whole stack and make sound trade-offs at every layer.

Your work will directly impact how students experience Level on mobile, and how quickly the rest of the engineering organization can ship mobile-enabled features.

• Design, build, and ship user-facing mobile features end-to-end — native client work on iOS and/or Android, plus the backend services and APIs that power them.

• Implement clean, readable, testable code that follows platform best practices on the client and Level's service conventions on the backend.

• Take responsibility for features from initial design through release and ongoing maintenance.

• Evolve module boundaries, navigation, state management, and offline behavior in the mobile clients.

• Make sharp build-vs-share decisions between fully native code and cross-platform approaches (Kotlin Multiplatform, shared protobuf contracts, Web Views) based on real product and engineering trade-offs.

• Design and operate backend services (Kotlin or Java on the JVM, or Type Script) that back the mobile experience — identity, content, sync, telemetry.

• Define and own reliability targets (SLOs/SLIs) for the services you own; implement structured logging, metrics, and tracing.

• Profile, debug, and optimize performance on device — startup, memory, battery, network — and on the backend — latency, throughput, cost.

• Apply mobile security fundamentals: secure storage (Keychain / Keystore), biometric auth, transport security, and handling of sensitive user data, with particular care for student data and K-12 privacy requirements.

• Participate in incident response and post-mortems for what you own.

• Partner with product, design, web/backend engineers, infrastructure, and QA to translate product requirements into pragmatic mobile + backend designs and ship them iteratively.

• Participate actively in planning, technical discussions, code reviews, and release processes — contributing practical input on feasibility, trade-offs, and implementation details.

• Own the release pipeline for the platforms you ship on (App Store Connect / Test Flight or Play Console), including staged rollouts and production monitoring.

• Ensure high standards of performance, stability, and test coverage on the mobile codebase and the services behind it; partner with our Dev Prod lead on mobile test strategy in CI.

• Actively contribute to improving app architecture, technical foundations, and developer experience.

• Identify and address technical debt, production issues, and scalability concerns — leave the code better than you found it.

• Mentor mid-level and associate engineers through pairing, code reviews, and technical guidance; help shape the conventions the rest of the team adopts.

• 5+ years of professional software engineering experience, including 3+ years of production native mobile development on at least one platform (Swift / Swift
  
  UI / UIKit on iOS, or Kotlin / Jetpack Compose on Android).

• At least one shipped…