Full Stack Engineer

Company Description

Role Description

What You’ll Work On

• Ship user-facing features across the Expo / React Native app and the NestJS / PostgreSQL API
• Build and extend our embedded self-custodial wallet (account-abstraction based) and the on-chain money
• movement around it
• Integrate and harden payment, card, and KYC flows with our processing and identity partners
• Strengthen the platform for scale and compliance — observability, secure secrets handling, webhook signature
• verification, and clean data migrations
• Deliver a first-class experience in five locales, including full Arabic RTL support

Qualifications

• 5+ years building and shipping production web and/or mobile applications
• Strong TypeScript across both front end and back end
• **Frontend:**
• React and/or React Native (Expo), with solid state management (Redux Toolkit or similar) and mobile build/release experience
• **Backend:**
• NestJS or a comparable Node.js framework (Express, Fastify), with REST API design experience
• Strong relational database skills (PostgreSQL) and ORM experience (TypeORM or equivalent), including migrations
• Hands-on experience with a major cloud provider — we run on AWS (App Runner, S3, Secrets Manager)
• Disciplined Git workflow: feature branching, pull requests, code review, and CI
• A security-first mindset — you understand why secrets never touch git and why every webhook must be verified

Key Responsibilities

• Design, build, test, and maintain features across mobile (Expo, React Native, Redux Toolkit, expo-router) and backend (NestJS, TypeORM, PostgreSQL)
• Write clean, well-typed TypeScript on both sides of the stack and uphold the team’s coding guidelines
• Build secure, well-documented REST APIs; maintain reliable database migrations and data integrity
• Integrate third-party services (payments, KYC, wallet, email, storage) with rigorous error handling and signature verification
• Own your work through the full lifecycle — PR, code review, CI, QA verification, staging soak, and production release
• Write unit and integration tests; treat tests as part of “done,” not an afterthought
• Manage environment configuration and secrets securely across dev, staging, and production
• Coordinate API contracts between mobile and backend, and collaborate through Git and code review
• Monitor production (Sentry, logs) and participate in incident response and post-mortems

Preferred Experience

• Fintech, payments, or other regulated-environment experience
• Web3 / blockchain familiarity — EVM chains, ERC-20 tokens, wallets, account abstraction (ERC-4337), or
• SDKs such as Dynamic or Privy
• Experience integrating card issuing / processing, KYC & identity (e.g. Sumsub), or custody providers
• Localization and right-to-left (Arabic)

experience

• Familiarity with Sentry, EAS (Expo Application Services), and CI/CD pipelines
• Comfort operating in an early-stage, high-ownership team

Technical Specifications

• **Mobile: React Native**
• (0.79), Expo 53, TypeScript, Redux Toolkit, Redux-Persist, Expo-Router, Expo-Secure-Store
• **Backend:**

NestJS 10, TypeScript, TypeORM, PostgreSQL

• **Web3 & Wallet:**
• Embedded self-custodial wallet via Account Abstraction (Dynamic Labs SDK), EVM Integrations
• **Fintech Integrations:**
• Card issuing / VISA processing, KYC & identity verification
• **Cloud & Infra:**

AWS (App Runner, S3, Secrets Manager)

• **Tooling & DevOps:**