Fullstack TypeScript Developer

About the role

Celar, a fast‑moving fintech startup, is seeking a Fullstack TypeScript Developer to accelerate the development of its cross‑platform mobile application. The role is remote and focuses on both mobile and backend integration within a blockchain‑enabled financial ecosystem.

Key responsibilities

• Develop and enhance the React Native/Expo mobile app using TypeScript.
• Integrate the existing TypeScript/Node.js backend APIs into the mobile application.
• Implement financial features such as payments, wallets, virtual accounts, and cross‑border transfers.
• Work with stablecoins, blockchain networks, and Web3 SDKs to enable wallet interactions.
• Ensure secure authentication, API security, and safe handling of sensitive financial data.

Required profile

• 2+ years of professional full‑stack or software development experience.
• Strong proficiency in TypeScript, JavaScript, and Node.js.
• Hands‑on experience building mobile apps with React Native, preferably using Expo.
• Ability to understand and work with an existing codebase independently.

Required skills

• React Native
• Expo
• Fastify, Express or NestJS
• PostgreSQL (or similar relational DB)
• ethers.js, viem or other Web3 libraries
• REST API design and consumption