Frontend Engineer - Cyrpto and Fintech

Wonnpay FZE; Dubai; On-site; AED 260,000 - 420,000; Full time

Job summary

WonnPay FZE is seeking an experienced Frontend Engineer to build and maintain high-quality fintech frontend experiences across wallets, payments, KYC, and account management. You will collaborate with backend teams, product, UX/UI, QA, and external partners to deliver secure, reliable interfaces for crypto transactions and card services.

You will work on secure authentication, multi-chain transactions, and scalable UI across mobile and web, using React/React Native and TypeScript in a fast-paced

Qualifications

• 5+ years of frontend development experience.
• Strong React/React Native, TypeScript, and JavaScript skills.
• Experience building fintech/crypto/wallet or payment apps.
• Good understanding of blockchain concepts and crypto networks.
• Experience with authentication, API security, and secure frontend practices.

Responsibilities

• Build and maintain frontend applications for WonnPay.
• Develop crypto-related user experiences (wallets, deposits/withdrawals, transactions).
• Integrate frontend with REST APIs and third-party fintech/crypto services.
• Work with blockchain concepts (USDT, USDC, BTC, ETH, SOL, ERC-20).
• Implement secure authentication, MFA, and wallet flows.
• Ensure responsive, performant cross-platform experiences.
• Collaborate with UX/UI to translate designs into production code.
• Participate in code reviews, CI/CD, and QA for releases.
• Resolve frontend production issues and performance problems.

Skills

React

TypeScript

JavaScript

Fintech/crypto

Web3

Wallets

API integration

Security

Expo

AWS

CI/CD

KYC/AML

Crypto payments

Job description

Role Overview

As a Frontend Engineer, you will be responsible for developing and maintaining high-quality frontend experiences across the WonnPay platform, including crypto wallets, deposits and withdrawals, transaction flows, KYC, card services, payments, and account management.
You will work closely with backend engineers, product, UX/UI, QA, compliance, and external technology partners to deliver secure, reliable, and user-friendly fintech products.

Key Responsibilities

• Build and maintain high-quality frontend applications for WonnPay.
• Develop crypto-related user experiences including:
  • Wallets
  • Crypto deposits and withdrawals
  • Blockchain networks
  • Transaction history
  • Address management
  • QR-based payments
  • On-chain transaction status
• Integrate frontend applications with REST APIs and third-party fintech/crypto services.
• Work with blockchain-related concepts such as USDT, USDC, BTC, ETH, SOL, TRC-20, ERC-20, and other networks.
• Implement secure authentication, session management, MFA, and wallet-related flows.
• Build responsive and performant experiences across mobile and web platforms.
• Work closely with UX/UI designers to translate designs into production-ready interfaces.
• Collaborate with backend engineers to define and consume APIs effectively.
• Investigate and resolve frontend production issues, performance problems, and customer-impacting bugs.
• Write clean, maintainable, scalable, and well-tested code.
• Participate in code reviews and follow engineering standards and best practices.
• Work closely with QA to ensure releases are stable and production-ready.
• Support rapid product releases while maintaining security, reliability, and code quality.

Required Skills & Experience

• 5+ years of professional frontend development experience.
• Strong experience with React / React Native / TypeScript / JavaScript.
• Strong experience building fintech, crypto, blockchain, Web3, wallet, or payment applications.
• Good understanding of blockchain and cryptocurrency concepts.
• Experience working with crypto wallets, blockchain transactions, token transfers, or payment flows.
• Experience integrating REST APIs and third-party services.
• Strong understanding of authentication, authorization, API security, and secure frontend development.
• Experience working with Git and modern CI/CD development workflows.
• Strong debugging and problem-solving skills.
• Ability to work in a fast-paced fintech/crypto environment.
• Experience with Expo / React Native.
• Experience with Web3 libraries and blockchain APIs.
• Experience with Fireblocks or other institutional digital-asset infrastructure.
• Experience with stablecoins and multi-chain transactions.
• Experience with crypto payment providers, exchanges, card platforms, or payment gateways.
• Understanding of blockchain transaction confirmations, network fees/gas, wallet addresses, and transaction states.
• Experience working with fintech compliance requirements such as KYC/AML.
• Experience with AWS and production application monitoring.