Senior Mobile Engineer – Kotlin Multiplatform & AI UI

webAI; Austin (TX); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Competitive salary

Health, dental, and vision benefits

401(k) match

Equity options

$200/month Health & Wellness stipend

Continuing Education support

$500/year Function Health subscription

Free parking for in-office employees

Flexible Time Off (FTO)

Parental leave

Job summary

webAI is building a flagship cross-platform application on Kotlin Multiplatform, using Compose Multiplatform and SwiftUI. The ideal candidate has a proven track record of developing and deploying native mobile apps using KMP technology.

As part of our team, you will write shared Kotlin code, build UI with Compose Multiplatform and SwiftUI, integrate on-device AI, optimize performance, and participate in code reviews and mentoring. This role offers a collaborative environment and modern tooling.

Qualifications

• 4+ years of mobile development with shipped production apps on Android, iOS, or both.
• Strong Kotlin skills including coroutines and Flows.
• Demonstrated interest in AI engineering.
• Solid experience with mobile tooling and app stores.
• Strong mobile product instincts.

Responsibilities

• Shared KMP modules — write shared Kotlin Multiplatform code with business logic.
• Compose Multiplatform UI and Native SwiftUI — build UI using shared code.
• On-device AI — integrate AI frameworks both on-device and remotely.
• Performance — profile and harden app performance on real devices; troubleshoot issues.
• Code review and collaboration — review diffs, mentor teammates, improve code quality.

Skills

Kotlin

Coroutines

Flows

AI engineering interest

Mobile tooling

App stores experience

Mobile product instincts

Kotlin Multiplatform (KMP)

Jetpack Compose

SwiftUI

SKIE/interop

Rust UniFFI/C++/JS

Open-source ML/AI contributions

Tools

Android tooling

iOS tooling

Job description

webAI is building a flagship cross-platform application on Kotlin Multiplatform, using Compose Multiplatform and SwiftUI. The ideal candidate has a proven track record of developing and deploying native mobile apps using KMP technology.

As part of our team, you will write shared Kotlin code, build UI with Compose Multiplatform and SwiftUI, integrate on-device AI, optimize performance, and participate in code reviews and mentoring. This role offers a collaborative environment and modern tooling.