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Senior Android Engineer

Zepz - London, England, United Kingdom - Hybrid

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Zepz is a fintech company powering WorldRemit and Sendwave, enabling cross-border money transfers for migrant communities. The Identity engineering teams (Signup, Authentication, KYC) sit at the front door of the product, serving as the first line of defence for a heavily regulated remittance business. You'll join as a Senior Android Engineer to modernise the Android experiences that carry millions of customers through onboarding and identity verification annually. Working alongside engineering managers, staff engineers, and cross-functional partners in product, design, and compliance, you'll raise the technical bar on mobile frontend architecture, test coverage, CI/CD, and release practices while shipping features customers depend on to move money safely. Required qualifications: - 5+ years shipping production Android applications to Google Play with deep Kotlin expertise - Fluency across Android UI paradigms (Compose and XML-based) with judgment on modernisation trade-offs - Strong command of asynchronous and stream-based state management; clear point of view on app architecture (unidirectional state, dependency injection, architectural boundaries) - Experience in large multi-module builds with layered/clean architecture, shared build logic, and treating build performance as a first-class concern - Track record evolving large, long-lived codebases; ability to retire legacy patterns without destabilising products - Rigorous, layered testing strategy; understanding of unit vs. integration vs. on-device testing; designing for testability - Genuine ownership of delivery pipelines; treating build, test, and release automation as products with reliability standards - Solid command of on-device security fundamentals: hardware-backed key storage, encrypted local storage, biometric authentication, device/app integrity, code obfuscation - Experience in regulated/high-compliance environments (fintech, healthtech) with instinct for KYC, authentication, and identity-verification flows - Confident release management at scale: staged rollout, feature flagging, remote kill-switches, crash/performance monitoring, ANR triage, rollback planning - Demonstrable experience with device diversity: manufacturer-specific behaviour, background/battery restrictions, minimum-API trade-offs, constrained hardware performance - Clear, structured written communication; ability to write design documents and post-mortems - Confidence with open-ended, ambiguous problems; ability to identify real issues and drive resolution - Experience mentoring engineers Zepz values mission-driven builders, relentless learners, responsible owners, and transparent communicators. The company offers unlimited annual leave, great healthcare benefits, employee discounts, and a high-trust culture emphasising high ownership and performance.

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