Senior React Native Engineer

About Us

Numu is redefining how people save, earn, and spend.

It’s a fully non-custodial, high-yield financial platform that lets users deposit stablecoins, automatically channels those deposits into advanced on-chain yield strategies, and enables seamless real-world spending through integrated card services, all while users remain in complete control of their assets.

Built to look and feel like a next-generation Web2 neobank, yet powered entirely by decentralized infrastructure, Numu delivers a frictionless experience: deposit. earn. spend. No complexity, no compromise, and no custody risk.

Numu’s mission is to unlock institutional-grade earnings for everyone, packaged inside a beautifully crafted, transparent, and user-centric app designed for the future of finance.

Position Overview

We are looking for a Senior React Native Engineer to lead the development of our flagship mobile applications. You will own the end-to-end mobile experience—from architecture and performance to deployment on the App Store and Play Store. This role is critical to our product roadmap, as the mobile app is the primary touchpoint for our users. You’ll work closely with product, design, and backend/Web3 teams to ship reliable, user-centric features at a fast pace.

Key Responsibilities

• Architect, develop, and maintain high-quality React Native applications for iOS and Android
• Own the full mobile delivery lifecycle: from technical design and implementation to testing, deployment, and monitoring in the App Store and Play Store
• Collaborate with product managers, designers, and backend engineers to translate business requirements into robust technical solutions
• Optimize app performance, responsiveness, and reliability, with a strong focus on smooth UX and minimal crashes
• Implement secure and scalable integrations with REST/GraphQL APIs and (preferably) Web3 wallets/contracts
• Establish and maintain best practices for code quality, testing (unit, integration, end-to-end), and CI/CD for mobile
• Mentor junior engineers, conduct code reviews, and contribute to technical decision-making and architecture discussions
• Additional relevant duties as assigned

Required Qualifications

Education & Experience

• Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent practical experience)
• 4+ years of hands-on experience building and shipping production applications using React Native (non-negotiable)
• Proven track record of publishing at least one app to the App Store or Play Store (both stores highly preferred; non-negotiable)
• Experience working in product-focused teams (startup or high-growth environment is a plus)

Technical Skills

• Expert-level proficiency in React Native, TypeScript/JavaScript, and modern React patterns (hooks, context, etc.)
• Strong experience with mobile app architecture, state management (Redux, Zustand, Recoil, MobX, etc.), and navigation (React Navigation or similar)
• Experience integrating with REST/GraphQL APIs and handling offline data, caching, and synchronization
• Solid understanding of mobile performance optimization, profiling, and debugging tools
• Experience with native modules (Android/iOS) and bridging when necessary
• Hands-on experience with app store deployment, signing, and release processes (TestFlight, internal testing tracks, etc.)
• Basic understanding of application security best practices (secure storage, encryption, handling secrets, etc.)

Non-negotiables:

• Has published at least one app to the App Store or Play Store (both highly preferred)
• Minimum 4 years of experience or significant contributions (either one) in shipping production apps with React Native

Soft Skills

• Excellent written and verbal communication skills; able to explain technical concepts to non-technical stakeholders
• Strong ownership mindset with a bias for action and shipping value quickly
• Proven ability to break down complex problems and propose pragmatic solutions
• Comfortable working in a fast-paced, iterative environment with changing priorities
• Collaborative team player who gives and receives feedback constructively and mentors others

Preferred Qualifications

• Web3 experience:
• Integrating Web3 wallets (e.g., MetaMask, WalletConnect) into mobile apps
• Interacting with smart contracts (ethers.js/web3.js/viem)
• Understanding of basic blockchain concepts (addresses, gas, transactions, signing, etc.)
• Experience in fintech/crypto or other highly regulated/secure domains
• Prior experience in performance-heavy, animation-rich apps (Reanimated, Gesture Handler, Lottie, etc.)
• Exposure to analytics, A/B testing, and feature flagging in mobile apps
• Experience leading small engineering squads or acting as a technical lead
• Contributions to open-source projects, especially in the React Native or Web3 ecosystem

Compensation & Benefits

• Salary range: $48k-$84k pa, competitive and commensurate with experience and location. Equity allocation may also be provided. Negotiable
• Significant growth opportunities in scope, responsibility, and leadership as the product and team scale
• Opportunity to shape the product and company from the ground up: As an extremely early-stage startup, you'll have direct influence on technical architecture, product direction, and company culture—building something from scratch rather than maintaining existing systems
• Accelerated career growth and expanded skill set: Early-stage environments require you to wear multiple hats, exposing you to areas beyond your core role (product strategy, hiring, user research, go-to-market) and fast-tracking your professional development
• Direct impact and ownership: Your work will have immediate, visible impact on the product and users, with minimal organizational layers between you and key decisions—allowing you to truly own your domain and see the results of your efforts in real time
• Work arrangement: Remote-friendly with options for hybrid/onsite where applicable; flexible hours aligned with core team collaboration times

Apply

Send an Email to with the role in the subject, and write about

• Your intent of joining Numu,
• How you fulfil core competencies.
• Links to your Github, Portfolio and your previous works.
• Also attach your resume as a Google Drive link (Visibility set to public)

Listed in: Web3 Jobs, Engineering Web3 Jobs, Senior Web3 Jobs, React Native Web3 Jobs, Web3 Web3 Jobs, Full Time Web3 Jobs, IOS Web3 Jobs, DeFi Web3 Jobs, Developer Crypto Jobs, Mobile Crypto Jobs, Remote Crypto Jobs.