Klaviyo

Software Engineer II (Mobile Developer - Android/Kotlin) - Mobile App Growth

Boston, MAFrom $174kmidAdded today

About this role

Join Klaviyo's Mobile App Growth team as an Android/Kotlin specialist to design and maintain the Android SDK that powers personalized mobile app experiences for thousands of customers. You'll own Android development while contributing to cross-platform SDKs (iOS, React Native, Flutter) and backend services for in-app messaging, universal linking, geofencing, and emerging products like mobile inbox.

What you'll do

Design, build, and ship features and fixes to the Android SDK used across diverse third-party apps and OS versions
Diagnose and resolve SDK issues reported by customers, debugging across multiple devices and environments
Contribute to other mobile SDKs (iOS, React Native, Expo, Flutter) and backend services supporting in-app messaging and geofencing
Write well-tested code, participate in code and design reviews, and maintain production Android code
Collaborate with product and engineering teams to ensure consistent tracking and messaging behavior across platforms
Create documentation, sample apps, and integration guides to help customers adopt the SDKs

What they're looking for

Android development with Kotlin (1-3 years professional experience)
Android lifecycle, threading, and Gradle
Unit, integration, and instrumentation testing; CI/CD for mobile
SDK/library development and cross-device debugging
Webviews and location services
Python, React, or AWS (as team needs evolve)
iOS/Swift or backend services experience (bonus)
Push notification and messaging systems (bonus)

Benefits

Work on foundational technology used by thousands of customers
Opportunity to grow beyond Android into multiple platform areas
Exposure to greenfield projects including mobile inbox
Collaborative culture valuing diverse backgrounds and perspectives
Flexibility to develop expertise across mobile, backend, and infrastructure
Clear ownership of end-to-end outcomes

Likely interview questions

Tell us about your experience shipping and maintaining production Android code. What Android lifecycle or threading challenges have you debugged?
Describe a time you had to debug an issue across multiple devices, OS versions, or third-party environments. How did you approach it?

Have you built or maintained an SDK or library before? How was that different from building an app, and what did you learn?
You'll need to occasionally pitch in on iOS, React Native, or backend work. How do you approach learning a new technology or platform?
Walk us through your testing strategy—how do you ensure quality with unit, integration, and instrumentation tests?
Tell us about a time you drove a problem end-to-end without heavy oversight. How did you identify the right approach?
How would you communicate a technical SDK limitation or design decision to a customer's engineering team?

Unlock all 7 questions free — and practice them live →

Apply on the employer's site →

Opens the official application on the employer’s site. No login required.