Senior Java Backend Engineer — Asset & Earn

OKX; Hong Kong; On-site; HKD 600,000 - 900,000; Full time

Benefits offered by this job

Competitive total compensation package

L&D programs and education subsidy

Team building programs

Wellness and meal allowances

Comprehensive healthcare schemes

Job summary

OKX is seeking a backend developer to join the Asset & Earn Team 2. You will design and build high-performance backend services for Simple Earn, Flash Earn, and Loan products that power millions of users' passive income journeys in crypto.

Collaborating with Product, Design, Risk, and Quant teams, you will implement scalable microservices, manage Jumpstart subscription flows, and support production systems in a cloud-based Linux environment. Fluency in English and Mandarin is expected.

Qualifications

• Minimum 3 years of backend development experience in financial or related industries.
• Experience in Microservice/API development with Java / SpringBoot / SpringCloud.
• Fluency in English and Mandarin.

Responsibilities

• Design and develop high-performance backend services for earn and loan products.
• Build and maintain the Jumpstart subscription and allocation system for new token launches.
• Design and implement backend systems for stablecoin yield distribution and settlement.
• Work closely with Product, Design, Risk, and Quant teams to deliver innovative earn and lending features.
• Participate in on-call production support and incident response to ensure platform stability.

Skills

AI-assisted tools

Backend development

Java SpringBoot

Multi-threading

Kafka

Redis

Kubernetes

MySQL

Linux

Finance concepts

English

Mandarin

Job description

Who We Are

At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.

About The Opportunity

The Asset & Earn Team 2 is responsible for building and scaling next-generation earn and lending solutions at one of the world's largest crypto exchanges. As a developer on this team, you will work on Simple Earn, Flash Earn (including Jumpstart), Loan products, and Stablecoin Yield features – powering millions of users' passive income journeys in the crypto ecosystem.

What You'll Be Doing

• Design and develop high-performance, high-availability backend services for Simple Earn, Flash Earn, and Loan products
• Build and maintain the Jumpstart subscription and allocation system for new token launches
• Design and implement backend systems for stablecoin yield distribution and settlement
• Work closely with Product, Design, Risk, and Quant teams to deliver innovative earn and lending features
• Participate in on-call production support and incident response to ensure platform stability

What We Look For In You

• Proficient in AI-assisted development tools such as Codex and Claude Code – mandatory requirement to boost engineering productivity and iteration speed
• Minimum 3 years of backend development experience in financial or related industries
• Experience in Microservice/API development with Java / SpringBoot / SpringCloud
• Strong understanding of multi-threading, concurrency control, and distributed system design, with experience in high-concurrency, high-availability, and high-performance systems
• Familiarity with mainstream messaging frameworks such as Kafka and caching solutions like Redis
• Experience with Kubernetes (K8s) for container orchestration and deployment
• Solid experience with relational databases (MySQL or equivalent)
• Comfortable in a cloud-based Linux environment with production support capability
• Basic understanding of finance concepts, particularly earn/deposit, lending/loan, and yield products
• Fluency in English and Mandarin

Business Domain Experience (At least one of the following three is required)

• Earn & Loan: Hands-on experience building earn or loan products, with understanding of interest accrual, risk control, and liquidity management
• Stablecoin Yield: Familiarity with stablecoin mechanics (USDT, USDC) and experience developing yield distribution or settlement systems
• Subscription & Allocation Systems: Experience building token launch, quota allocation, or subscription systems (e.g. Jumpstart-style products)

Perks & Benefits

• Competitive total compensation package
• L&D programs and education subsidy for employees' growth and development
• Various team building programs and company events
• Wellness and meal allowances
• Comprehensive healthcare schemes for employees and dependants
• More that we love to tell you along the process!