Senior Backend Engineer - DEX Trading Systems

OKX; Singapore; On-site; SGD 90,000 - 130,000; Full time

Benefits offered by this job

Competitive pay

Education subsidy

Team building events

Wellness & meal allowances

Healthcare for employees and dependats

Job summary

OKX is seeking a seasoned backend engineer to design, build, and scale the backend systems powering OKX’s DEX trading products. You will own critical parts of the trading lifecycle—from quote discovery and order management to transaction submission and reconciliation—working with product, frontend, smart contract, and infrastructure teams.

This hands-on role includes architectural ownership and opportunities to grow into technical leadership, delivering secure, reliable services across multiple

Qualifications

• 5+ years of professional backend engineering experience.
• Strong proficiency in Java and related backend ecosystem.
• Experience in high-availability services and production issues.

Responsibilities

• Design and develop backend services for quotes, orders, transactions, and execution tracking.
• Integrate with DEX protocols, liquidity sources, RPC providers, and indexing services.
• Keep trading services reliable under high concurrency and traffic spikes.
• Implement rate limiting, concurrency controls, and graceful degradation.
• Optimize DB access, transactions, caching, and async processing.
• Support workflows across multiple blockchains; handle submissions and confirmations.
• Build data reconciliation between backend records and on-chain execution.
• Translate product requirements into production-ready designs.
• Own features end-to-end from implementation to post-launch operation.

Skills

Java

Backend engineering

Concurrency

Distributed systems

Relational databases

Caching

Messaging systems

Production ownership

Cross-functional communication

Job description

OKX is seeking a seasoned backend engineer to design, build, and scale the backend systems powering OKX’s DEX trading products. You will own critical parts of the trading lifecycle—from quote discovery and order management to transaction submission and reconciliation—working with product, frontend, smart contract, and infrastructure teams.

This hands-on role includes architectural ownership and opportunities to grow into technical leadership, delivering secure, reliable services across multiple