Sr. Martech Engineer, Mobile - Acorns

At Acorns, our mission is to look after the financial best interests of the up-and-coming, beginning with the empowering, proud step of micro-investing. We are a remote-first organization, offering the flexibility to work remotely while providing optional access to office space in Irvine, CA.

What you will do at Acorns

Mobile SDKs and Instrumentation

• Implement, maintain, and debug attribution, analytics, and engagement SDK integrations in our iOS and Android apps.
• Contribute mobile code for event tracking, identity handling, consent, and deep linking.
• Define and validate SDK initialization, event sequencing, and login/logout behavior.
• Investigate missing or duplicate events, incorrect parameters, SDK conflicts, and differences across platforms or app versions.
• Partner with Core Client engineers on code reviews, SDK upgrades, release testing, and production fixes.

Attribution and Marketing Integrations

• Configure and maintain mobile and web attribution, including attribution windows, reattribution, deduplication, fraud filtering, and SKAdNetwork/AdAttributionKit.
• Implement and test deep links and deferred deep links for acquisition and lifecycle campaigns.
• Build and maintain advertising integrations, including conversion APIs, enhanced conversions, affiliate postbacks, and conversion crediting.
• Partner with Data Engineering to deliver conversion events, audiences, and suppressions through reverse ETL.
• Investigate differences between internal conversion data, our attribution provider, and ad platforms, and resolve the underlying issues.

Event Definitions and Identity

• Maintain documented definitions for marketing events, including required parameters, identifiers, owners, and destinations.
• Ensure anonymous and authenticated activity connects correctly across app SDKs and downstream platforms.
• Work with first-party customer IDs, device and advertising IDs, click IDs, and hashed PII.
• Ensure tracking and data delivery respect customer consent.
• Maintain consistent event and identity definitions for marketing use cases across mobile, web, and backend systems.

Platform Configuration and Integration Support

• Own and maintain integrations across our apps, marketing tools, data platform, and ad platforms, with documented data flows and ownership.
• Support Lifecycle Marketing with event triggers, personalization, audience delivery, push notifications, and deep links.
• Partner with platform owners and vendors on technical configuration, administration, and troubleshooting.

Validation and Monitoring

• Validate event payloads and downstream delivery for critical marketing flows before app releases.
• Automate testing and monitor critical marketing flows for event and delivery issues.
• Trace events from the app through attribution and ad platforms to diagnose and resolve failures.
• Scope and deliver instrumentation and integration changes with Marketing, Mobile, and Data Engineering.

What you will bring to Acorns

• 5+ years of software engineering experience, including hands-on mobile development and experience in Martech, adtech, growth engineering, or mobile measurement.
• Strong production development experience in Swift/iOS, Kotlin/Android and Flutter, with working familiarity with the other platform.
• Hands-on experience implementing and maintaining mobile attribution, analytics, or engagement SDKs.
• Experience with app lifecycle behavior, SDK initialization, identity changes, deep linking, and debugging on physical devices.
• Experience delivering marketing integrations from app instrumentation through attribution and downstream delivery.
• Experience with a mobile measurement partner such as Adjust, event-routing platforms such as RudderStack or Segment, and activation platforms such as Hightouch.
• Strong understanding of SKAdNetwork/AdAttributionKit, ATT, advertising identifiers, and consent requirements.
• Ability to use device logs, network inspection, API diagnostics, and SQL to investigate events and reconcile data across systems.
• Experience implementing tests, monitoring, or alerts for instrumentation and integrations.
• Clear documentation and communication skills, with the ability to scope ambiguous problems and drive them to completion across teams.

What we offer

• Competitive salary and stock options
• A comprehensive benefits package for you and your family
• Flexible work location, hours, and paid time off
• 401(k) matching
• Monthly Acorns account contribution & GoHenry account for your family
• Mindfulness and Financial Wellness resources, Headspace and Addition Wealth
• Acorns Career Development Program and Roots Leadership Program
• Talented and motivated team members who care deeply about one another and our mission