Senior / Staff Backend Engineer, Web3 Invest

P2P; Singapore; On-site; SGD 80,000 - 100,000; Full time

Job summary

A leading crypto exchange in Singapore is seeking a skilled software developer to create and optimize server-side APIs for blockchain-related applications. Ideal candidates will have a Bachelor's in Computer Science, solid Java skills, and familiarity with mainstream Java frameworks like Spring. Experience in high-traffic system development and a passion for blockchain technology are preferred. Join a company that values innovative solutions and offers a competitive compensation package with robust employee benefits.

Benefits

Competitive total compensation package

L&D programs and education subsidy

Wellness and meal allowances

Comprehensive healthcare schemes

Qualifications

• Solid foundation in Java with strong knowledge of multithreading and networking.
• Proficiency in Spring, Spring MVC, and Spring Boot frameworks.
• Experience in high-traffic and high-concurrency system development.

Responsibilities

• Develop server-side APIs for blockchain-related services.
• Optimize system performance for reliability and availability.
• Identify service optimization opportunities and enhance productivity.

Skills

Java

Spring Framework

Object-oriented programming

Blockchain technology

System architecture design

Education

Bachelor’s degree in Computer Science

Job description

OKX will be prioritising applicants who have a current right to work in Singapore, and do not require OKX's sponsorship of a visa

About OKX:

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 team:

As a key builder of DeFi products, the team plays an integral part in OKX's journey to reshape the financial ecosystem. OKX Earn provides users with a way to generate interest on your assets through multiple investment choices in the DeFi space, aiming to convert hodls to maximized crypto gains to millions of global users. The objective of the products is simple - hodl, have a good time and earn along the way.

Responsibilities:

• Responsible for developing server-side APIs for blockchain-related businesses, as well as blockchain services required by other products
• Optimize system performance and tackle technical challenges to ensure high availability, reliability, and performance
• Possess strong architectural capabilities, including identifying service optimization opportunities and improving engineering productivity
• Gain a deep understanding of business and product requirements, and complete feature design, architecture optimization, and development

Requirements:

• Bachelor’s degree or above in Computer Science, Software Engineering, or a related field
• Solid foundation in Java, including JVM, I/O, multithreading, concurrency, and networking; strong understanding of object-oriented programming, design principles, encapsulation, and abstraction
• Proficient in mainstream Java frameworks such as Spring, Spring MVC, and Spring Boot, with well-proven hands‑on project experience; experience with consumer-facing (To-C) systems and system architecture is preferred; candidates with experience in large-scale projects and application architecture design are a plus
• Experience in To-C development and architecture design within the financial industry is preferred
• Experience in high-traffic, high-concurrency system development and architecture design is preferred
• Familiarity with blockchain platforms such as Bitcoin, Ethereum, Hyperledger, etc., is a plus; or experience with one or more major decentralized finance (DeFi) projects, such as MakerDAO, Uniswap, Compound, or Synthetix
• Strong interest in blockchain technology is preferred, especially hands‑on usage or research experience in public-chain ecosystem projects such as Uniswap or AAVE

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!