Software Engineer - Java (Quant Platform - Trading Services)
About Us
At OKX, we believe that the future is being shaped by technology. Established in 2017, OKX is a leading global platform for cryptocurrency spot and derivatives trading. We use blockchain technology to transform the financial ecosystem by offering a wide range of innovative products, solutions, and trading tools. Trusted by over 20 million users worldwide across 180 regions, OKX aims to provide an empowering platform that allows individuals to explore the world of crypto. In addition to our exceptional DeFi exchange, we also have OKX Insights, a research arm that stays at the forefront of the latest trends in the cryptocurrency industry. With our extensive range of crypto products and services, and our commitment to innovation, we envision a world of financial access supported by blockchain and decentralized finance.
We value our people as much as we value technology. Our inclusive culture fosters teamwork, embraces change, and promotes integrity. We are dedicated to creating a friendly, rewarding, and diverse environment for all OKX team members. Regardless of your background, everyone at OKX feels valued, respected, and has equal opportunities for development and success - we want to bring out your best.
About the Role
The Quant Platform at OKX provides cutting-edge technology solutions that cover all aspects of crypto trading. We develop low-latency connectivity for global crypto venues, offer strategy services for automated pricing and trading bots, capture and analyze high-frequency data, and provide a state-of-the-art micro frontend for trading management.
If you are a talented technologist who is passionate about the potential of crypto trading and is interested in fully-automated algorithmic bots, we would love to hear from you.
We are currently seeking a Java Software Engineer to join our Quant Platform Trading Services team. In this role, you will have the opportunity to be involved in every aspect of a high frequency, low latency trading system and its evolution. This is a unique chance for you to contribute your expertise and grow with the industry. You will collaborate closely with product managers, engineers, and other cross-functional team members to deliver remarkable features.
Responsibilities
- Develop and maintain market data and trading connectivity to global crypto trading venues such as CEX, DEX, and single/multiple dealer platforms.
- Develop and support the Market Data Service Cluster and Trading Service Cluster, using our in-house low-latency transport layer based on Aeron and Chronicle Queue.
- Develop and maintain a config and reference data management system that provides a unified data model and process for both trading and risk management services.
- Measure and monitor internal market data and order latency systematically.
- Continuously improve the system to enhance stability, scalability, and robustness, with automatic recovery ability for 24x7 crypto trading.
Requirements
- Strong educational background in STEM (Science/Technology/Engineering/Mathematics).
- Excellent logical thinking and problem-solving skills.
- Proficiency in high-performance Java programming and asynchronous programming patterns.
- Familiarity with distributed systems and microservice architecture.
- Experience in automated testing and continuous integration.
- Willingness to learn all aspects of trading products in the financial and crypto markets, including spot, futures, swaps, options, structured products, and DeFi trading.
Note: Links have been preserved as per the provided job description.
Senior Blockchain Engineer
Protocol Core: Development and optimization of L2-settlement logic on Solidity/Yul.
Bridge Security: Designing secure cross-chain gateways with protection against double spending and reorgs.
Node Infrastructure: Optimizing the interaction of node validators with the EVM stack.
Gas Engineering: Extreme cost reduction for publishing data in L1 (Deneb/Cancun-ready).
Requirements:
Deep knowledge of Solidity (0.8.20+) and Assembly (Yul).
Experience working with Foundry (Fuzzing/Invariants) and understanding the architecture of OP Stack or Arbitrum Orbit.
Skills of working with indexers (The Graph/Envio) and the RPC layer.
Social media manager
Senior Blockchain Engineer
DApp & Smart Contract Developer (Vesting Platform)
This role is ideal for someone who thrives in fast-moving environments, values clean and secure code, and understands the nuances of blockchain-based application architecture.
Responsibilities
Diagnose and resolve issues in vesting smart contracts and their front-end integrations.
Implement new features and system enhancements to improve UX and overall platform performance.
Maintain smooth interaction between the web interface and deployed smart contracts.
Conduct testing, audits, and deployments across testnet and mainnet environments.
Optimize contract logic for performance, security, and gas efficiency.
Collaborate with our engineering team to identify pain points and deliver stable, secure solutions.
Requirements
Proven experience building full-stack decentralized applications.
Strong proficiency in Solidity, JavaScript/TypeScript, and modern frameworks (Angular, React, or Vue).
Hands-on experience with Hardhat or Foundry for smart contract development and testing.
Familiarity with Ethers.js or Web3.js for blockchain interaction layers.
Solid understanding of Ethereum, Polygon, or other EVM-compatible chains.
Experience integrating wallets such as MetaMask and managing on-chain/off-chain data flows.
Strong debugging skills, attention to detail, and a security-first mindset.
Nice to Have
Experience with smart contract security audits and gas optimization techniques.
Knowledge of Node.js-based backend services or API integration layers.
Previous experience with vesting, staking, or token distribution mechanisms.
Project Scope
This role supports a short-to-mid-term initiative focused on stabilizing and enhancing an existing crypto vesting platform. High-performing developers may have opportunities for ongoing collaboration across additional blockchain and product engineering projects.
Hiring Process
Technical Assessment - Selected candidates will complete a short, clearly scoped technical exercises designed solely to evaluate coding approach and smart contract knowledge.
CTO interview - A final discussion to evaluate technical reasoning, architectural thinking, and team fit. Successful candidates may receive an offer through Contra following this conversation.
Senior Blockchain Developer - Ethereum/PulseChain - GAM3S.GG
We're looking for a Senior Blockchain Developer with strong Ethereum/PulseChain smart contract experience to work on our DeFi/GameFi platform. You'll be building and maintaining betting contracts, yield farming mechanisms, token swap systems, and Web3 frontend integrations for our decentralized application on PulseChain.
Key Responsibilities
Smart Contract Development
System Architecture & Integration
Frontend Web3 Integration
Security & Compliance
Performance & Monitoring
Required Technical Skills
Blockchain Expertise
Frontend Web3 Development
Development Tools
Integration & Tools