Full Stack Engineer

Company Description:Wonnpay is a crypto-native payment network built for global citizens, high-value individuals, and mobile-first entrepreneurs. Our mission is to make transactions smarter, faster, and more secure by providing innovative payment solutions that streamline financial operations and empower businesses to grow. Focused on adapting to the evolving needs of modern commerce, Wonnpay delivers scalable and efficient digital payment infrastructures. Driven by technology and a commitment to trust, we help partners succeed in the rapidly changing world of finance.Role Description:We are seeking a Full Stack Engineer for a full-time, on-site role located in Dubai, United Arab Emirates. The Full Stack Engineer will be responsible for designing, developing, and maintaining both front-end and back-end components of web applications. This role involves collaborating with cross-functional teams, ensuring high-quality code, optimizing performance, and solving complex technical challenges to develop robust software solutions, to design, build, and scale our fintech and crypto platform. You will work across both frontend and backend systems, delivering secure, scalable, and high-performance solutions in a fast-paced startup environment. The candidate will contribute to our mission of delivering innovative payment and fintech solutions for a global audience.Ship user-facing features across the Expo / React Native app and the NestJS / PostgreSQL APIBuild and extend our embedded self-custodial wallet (account-abstraction based) and the on-chain moneymovement around it Integrate and harden payment, card, and KYC flows with our processing and identity partnersStrengthen the platform for scale and compliance — observability, secure secrets handling, webhook signatureverification, and clean data migrations Deliver a first-class experience in five locales, including full Arabic RTL supportQualifications4+ years building and shipping production web and/or mobile applicationsStrong TypeScript across both front end and back endFrontend: React and/or React Native (Expo), with solid state management (Redux Toolkit or similar) and mobile build/release experienceBackend: 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 migrationsHands-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 CIA security-first mindset — you understand why secrets never touch git and why every webhook must be verifiedKey Responsibilities:Design, build, test, and maintain features across mobile (Expo, React Native, Redux Toolkit, expo-router) andbackend (NestJS, TypeORM, PostgreSQL) Write clean, well-typed TypeScript on both sides of the stack and uphold the team’s coding guidelinesBuild 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 andsignature verification Own your work through the full lifecycle — PR, code review, CI, QA verification, staging soak, andproduction 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 productionCoordinate API contracts between mobile and backend, and collaborate through Git and code review Monitor production (Sentry, logs) and participate in incident response and post-mortemsPreferred Experience: Fintech, payments, or other regulated-environment experience Web3 / blockchain familiarity — EVM chains, ERC-20 tokens, wallets, account abstraction (ERC-4337), orSDKs such as Dynamic or PrivyExperience integrating card issuing / processing, KYC & identity (e.g. Sumsub), or custody providers Localization and right-to-left (Arabic) experienceFamiliarity with Sentry, EAS (Expo Application Services), and CI/CD pipelinesComfort operating in an early-stage, high-ownership teamType:Full TimeWork Setup:Hybrid