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

Boston, United StatesOn-site

Responsibilities

Design, build, and ship features and fixes to the Android SDK — your primary area of ownership — used across a huge range of third-party apps and OS versions/devices.
Diagnose and resolve SDK issues reported by customers.
Write clean, well-tested code and participate in code and design review.
Collaborate with product and other engineering teams to keep tracking and messaging behavior consistent across platforms.

As a natural extension of the SDK, the team also builds and maintains adjacent mobile products that are enabled by it:
Pitch in on our other mobile SDKs (iOS, React Native, Expo, and Flutter) when priorities call for it; you don't need to be an expert everywhere, but you should be willing to get hands-on.
Android-first — 1-3 years of professional Android development experience, ideally including Kotlin; this is your core strength and primary focus.
High ownership — you treat outcomes as yours end-to-end, not just the code you personally typed. As AI tooling raises how much one engineer can credibly own, this matters more than it used to.
experience shipping and maintaining production Android code, with a solid grasp of the Android lifecycle, threading, and Gradle.
Comfortable in the weeds — used to debugging across a wide matrix of devices, OS versions, and third-party app environments, since SDK work means you don't control the host app.
experience building or maintaining an SDK/library (versus an app), exposure to iOS/Swift or backend services, familiarity with push notification/messaging systems, or contributions to open source.
Technologies We Use (not exhaustive) iOS (Swift) Android (Kotlin) React Native Flutter
React, TypeScript, Redux Python, Django
MySQL, Redis, DynamoDB
AWS (EC2, RDS, Aurora), Terraform

Curious — comfortable with webviews and location services, and open to picking up new technologies (Python, React, AWS) as the team's surface area grows. Bonus :
Our salary range reflects the cost of labor across various U.S. geographic markets.
The range displayed below reflects the minimum and maximum target salaries for the position across all our US locations.
The base salary offered for this position is determined by several factors, including the applicant’s job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing
Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
Base Pay Range For US Locations: $116,000 — $174,000 USD

Want to learn more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to own their own destiny.

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day.
We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements.
If you’re a close but not exact match with the description, we hope you’ll still consider applying.
The Mobile App Growth team's mission is to enable Klaviyo customers to develop and maintain personalized relationships with their mobile app users through rich mobile app experiences.
The team is part of the Mobile App Marketing org and owns Klaviyo's mobile SDKs — the foundational layer that enables customers to integrate Klaviyo into their mobile apps.
In-app messaging — including the in-app messaging publishing and scheduling pipeline
Universal linking — universal links settings pages and web tier Geofencing
That product list keeps expanding — this year alone the team is greenfielding several new features, including mobile inbox.
We're looking for passionate engineers who want to roll up their sleeves and grow beyond just Android into the other areas the team owns.
Contribute to the backend services, infrastructure, and embedded web UI that power products like in-app messaging, universal linking, and geofencing — including newer greenfield work like mobile inbox.