Backend Blockchain Engineer - Web3 Infrastructure & APIs

Wanoyu Global; Kuala Lumpur; On-site; MYR 120,000 - 180,000; Full time

Benefits offered by this job

Job summary

COINYEX is seeking a Backend / Blockchain Engineer to build and maintain the TUX WALLET backend, APIs, and cross-chain integrations. You will work on secure, scalable financial infrastructure and contribute to Web3-based services in a Linux/Git environment.

You will collaborate on REST and WebSocket services, ERC-20 token integration, and cross-chain protocols while ensuring reliability and secure operation in production.

Qualifications

• Proficient backend development experience.
• Experience designing and developing APIs.
• Practical blockchain/Web3 knowledge.
• Comfortable with Linux and Git/GitHub.
• Able to communicate technical matters in English.
• Independent researcher and learner of new technologies.
• Focus on security, scalability, reliability and failure scenarios.

Responsibilities

• Design, develop, and maintain backend and blockchain-related systems.
• Build and maintain the TUX WALLET backend.
• Design and develop REST APIs and WebSocket services.
• Work with databases, caching, queues, and asynchronous processing.
• Integrate Ethereum and other EVM-compatible blockchains.
• Handle RPC providers, gas, nonces, and confirmations.
• Integrate ERC-20 tokens and smart contracts.
• Monitor on-chain data and blockchain events.
• Contribute to DEX/Swap integrations.
• Work with cross-chain and omnichain technologies.
• Integrate external APIs including payment, KYC, on/off-ramp, exchange, banking, and card services.
• Build secure, scalable, and highly reliable financial infrastructure.
• Implement monitoring, logging, authentication, authorization, and security controls.

Skills

Backend development

API design

English communication

Independently learn new tech

Security mindset

Tools

Node.js/TypeScript

Python

NestJS

Redis

REST/WebSocket APIs

PHP

Job description

COINYEX is seeking a Backend / Blockchain Engineer to build and maintain the TUX WALLET backend, APIs, and cross-chain integrations. You will work on secure, scalable financial infrastructure and contribute to Web3-based services in a Linux/Git environment.

You will collaborate on REST and WebSocket services, ERC-20 token integration, and cross-chain protocols while ensuring reliability and secure operation in production.