Job Specifications
hackajob is collaborating with Elsewhen to connect them with exceptional tech professionals for this role.
Location: London (Hybrid, 2-3 days/week in office - (Located in East India Doc)
Duration: 6-9 months - Outside of IR35
Start date: End of July
Day rate: PS450-500
About The Client & Project
Elsewhen is a London based consultancy designing digital products & services for the likes of Spotify, Inmarsat and Zego. Over the past 11 years, Elsewhen has created a working environment that is impactful, driven, open and friendly. We value outcomes over hours and agility over rigid processes.
We're looking for a freelance React Native Engineer, with circa 5 years experience, to help build a brand new product for a client in the telecommunications industry. You will be part of a self-organising and cross functional Agile team, creating extremely well-crafted mobile app, supporting web and payment integration.
Key Responsibilities
Design and build robust, scalable React Native mobile apps using TypeScript and Expo (managed + ore-build workflows)
Integrate with REST APIs and potentially GraphQL
Implement local storage strategies (e.g., Zustand, MMKV) with offline-first logic and background syncing
Debug native crashes & understand how to troubleshoot native modules using Xcode/Android Studio
(Ideally) Integrate secure payment solutions and handle payment workflows (credit card, debit card, third-party providers)
Work collaboratively with backend teams to implement sync logic, authentication, and secure data flows
Contribute to scalable project architecture, reusable components, atomic design, and efficient CI/CD workflows (Expo EAS, CircleCI, etc.)
Collaborate closely with other engineers, designers and stakeholders in a co-located team environment
Participate in code reviews and knowledge sharing
Skills & Experience
5+ years of professional front-end experience, with at least 3+ years of React Native
Strong knowledge of JavaScript & TypeScript
Ability to debug and work with native modules (Swift/Kotlin) even if not a native mobile dev
Experience structuring production-grade React Native apps (atomic design, scalable routing, Expo Router)
Familiar with local storage management and offline-first approaches
Comfortable troubleshooting 3rd-party SDKs & forking open-source packages when needed
Good understanding of mobile build pipelines (EAS, CircleCI, Xcode, Android Studio)
Ability to demonstrate end-to-end delivery -- from MVP to production
Excellent communication & problem-solving skills
Desirable
Prior payment provider integration (Stripe, Adyen, or similar) in a mobile app
Experience with GraphQL
Familiarity with telco / eSIM products
Why Join
Be part of building a brand new digital product from POC to launch
Work in a fast-paced, ambitious environment with clear growth plans
Contribute to meaningful innovation in the telco and eSIM market
Be supported by an experienced, trusted consultancy team (Elsewhen)
If you're a pragmatic, delivery-focused React Native developer ready to own builds, solve real-world edge cases, and ship a greenfield product, we'd love to hear from you!
Our Commitment To Diversity
Diverse thoughts, backgrounds, and perspectives create stronger teams and better technology. We welcome everyone, regardless of culture, appearance, or perspective, fostering individuality. We empower our team to challenge norms, grow ideas, and produce their best work.
About the Company
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