Senior Mobile Engineer, Shopper Activation and Engagement

Overview

Instacart’s Shopper Activation and Engagement team powers the fulfillment of every grocery transaction by helping shoppers find meaningful, rewarding, and fair work opportunities—so they can earn reliably and deliver top-shelf service for customers and retailers.

As a Senior Mobile Engineer focused on our Android shopper app, you will build consumer-facing experiences that directly influence marketplace health, including supply, utilization, efficiency, and quality. You’ll join a high-performing, collaborative team that owns the complete shopper lifecycle—from activation and onboarding to engagement, earnings, quality and ratings, recognition, retention, and safety—giving you exceptional scope and measurable impact on millions of people who shop and deliver every day.

You’ll partner closely with Product, Design, Data Science, and cross-functional groups across Instacart (Logistics, Mobile Foundations, Transaction Platform, Identity & Fraud, Operations, Legal, Trust & Safety, CRM, Learning, and the Shopper Community) to design, ship, and iterate features that move key business outcomes at scale.

About the Job

• Design, build, and ship high-quality Android features in Kotlin that drive shopper activation, engagement, retention, and earnings across the shopper lifecycle.
• Own features end-to-end—from ideation and technical design through implementation, experimentation, launch, and ongoing iteration—balancing velocity with reliability and quality.
• Collaborate with Product, Design, and Data Science to define problem statements, build metrics and dashboards, run A/B tests, and make data-informed decisions that improve marketplace health (supply, utilization, efficiency, quality).
• Contribute to and evolve app architecture, ensuring scalable patterns, robust dependency injection, and maintainable code that improves developer productivity and release reliability.
• Uplevel operational excellence by improving performance, stability, monitoring, and observability; participate in code reviews and contribute to our engineering best practices.
• Partner with platform and service teams to integrate APIs and ensure security, privacy, trust, and safety are first-class considerations in every experience.

About You

Minimum Qualifications

• 5+ years of professional Android development experience with Kotlin.
• 2+ years building consumer-facing, application-layer features used at scale (e.g., activation, onboarding, engagement, growth, or earnings experiences).
• Proficiency with RxJava and Dagger; working knowledge of Jetpack Compose in production or migration contexts.
• Proven track record of owning features end-to-end (technical design, implementation, testing, release, and iteration) and delivering measurable impact.
• Experience collaborating closely with Product, Design, and Data Science to define requirements, instrumentation, and success metrics.
• Strong computer science fundamentals (data structures, algorithms, concurrency) and a BS in Computer Science or related field, or equivalent practical experience.

Preferred Qualifications

• Experience with Kotlin Coroutines, Gradle build tooling, and modern Android architectural patterns (e.g., MVVM/MVI, modularization).
• Background in high-scale consumer marketplaces, logistics, or growth/engagement domains (e.g., onboarding, retention, earnings, ratings, recognition, trust & safety).
• Hands-on experience with experimentation and analytics (A/B testing, feature flags, metrics dashboards; SQL or BigQuery a plus).
• Demonstrated success in fast-paced, rapidly changing environments with a bias toward ownership, operational rigor, and high-quality execution.
• Experience mentoring engineers and elevating team standards in code quality, testing, and observability.

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