Senior Mobile Engineer

Who We Are At Omaze, we give our community in the UK and Germany the chance to win luxury homes and other life-changing prizes — all while raising money for the causes they love. Thanks to our Omaze Community, we’ve raised over £100 million for UK charities in just five years. That’s millions helping organisations like AgeUK, the RSPCA, British Heart Foundation and Great Ormond Street Hospital Charity deliver life-saving work. And the best part? We’re only just getting started. Omaze is building a business and culture committed to growth and creating significant social impact on a global scale. Why You’ll Love Working at Omaze Growth: Omaze is one of the fastest-growing companies in the world.Impact: Join a team of world changers dedicated to creating a ripple effect of good.Pioneering: Be part of something no one has done before.Culture: We work hard, grow together, and spread joy along the way. 🔧What You'll Be Doing As a Senior Mobile Engineer at Omaze, you take genuine ownership of the mobile experience our customers rely on and you care deeply about getting it right. ReactNative and Expo are your primary tools, and you're experienced enough with both to know their strengths, their limits, and when to reach beyond them. That's where your nativeknowledge comes in: whether it's Swift, Kotlin, or both, you're comfortable dropping into nativecode when the situation calls for it when it comes to performance, platform APIs, or something Expo just can't do out of the box. At Omaze, we are aiming for our app to not just be a utility but a premium experience. Own the design, implementation, and testing of features across our TypeScript, ReactNative and Expo codebase, producing code that's performant, maintainable, and delivers a genuinely great user experience on both iOS and Android.Work closely with product and UX from the earliest stages of a feature, contributing to interaction and technical design decisions before they're hard to change.Own the quality of what you ship end-to-end: writing well-tested components, holding a high bar in code review, and taking responsibility for production behaviour.Contribute to release pipeline and EAS build and deployment workflows to help the team ship frequently, safely, and with confidence.Uphold and actively contribute to mobile engineering standards and best practices, patterns, performance budgets, and platform-specific conventions that keep the codebase healthy as it grows.Use AI-assisted and agentic coding tools as a natural part of your workflow, applying the same rigour and judgement to AI-generated code as you would to anything hand-written. 🤩About You Passionate about mobile craft: you notice when an animation is 2ms off, when a transition doesn't feel quite right, or when a scroll list isn't as smooth as it should be and you do something about it.You understand that for a premium experience, performance is the product. You think about frame rates, responsiveness, and perceived speed not as nice-to-haves but as core quality requirements, and you have the tools and instincts to measure, diagnose, and raise the bar.Significant experience as a mobile engineer, with strong hands-on expertise in ReactNative and Expo, including EAS build and submission workflows.Comfortable working across iOS and Android within a shared ReactNative codebase, with a solid understanding of platform-specific behaviour and constraints.Nativemobile experience in Swift (iOS) and/or Kotlin (Android) is desirable. You can read, write, and debug nativecode.Strong understanding of mobile performance. You know how to diagnose and fix issues across JS thread, nativethread, and render pipeline.Experience with automated testing for mobile unit, integration, and end-to-end (e.g. Jest, Maestro, Appium).Familiar with App Store and Google Play submission, review processes, and release management.A collaborative, clear communicator who works well with product, UX, and backend engineers. You can translate mobile constraints into language the whole team understands. Company Benefits Generous stock options scheme25 days annual leave PLUS Bank HolidaysPrivate medical and dental insurance9% employer pension contributions, when you contribute at least 2%A generous personal learning and development budget each year to use on training courses, conferences and professional membershipsEnhanced family leave policiesLife assurance of 4x your salary Interview Process Recruiter ScreenHM interviewTechnical onsite interview