Software Engineer - Java (Quant Platform - Strategy Services)
About OKX:
At OKX, we are devoted to leveraging technology to reshape our future. Established in 2017, OKX stands as a prominent cryptocurrency spot and derivatives exchange worldwide. With a foundation in blockchain technology, we aim to transform the financial landscape by offering diverse products, solutions, and trading tools. Trusted by more than 20 million users across 180 global regions, OKX aims to provide an interactive platform that unlocks the world of crypto for every individual. Alongside our DeFi exchange, OKX delivers OKX Insights, a forward-looking research division within the cryptocurrency industry. With a vast array of crypto services and a commitment to innovation, OKX envisions a landscape of financial access supported by blockchain and decentralized finance.
We are dedicated to nurturing our team members just as much as we are to advancing technology. Our culture is characterized by teamwork, adaptability to change, and ethical practices. We endeavor to cultivate a welcoming, fulfilling, and diverse environment for all individuals at OKX. Regardless of background, everyone is esteemed, respected, and equipped with equal opportunities to grow and excel — we are here to help you unleash your full potential.
About Quant Platform:
Quant Platform offers cutting-edge technology that spans all facets of crypto trading. Our scope includes establishing low-latency connections to global crypto platforms, providing automated pricing and trading bot strategies, conducting high-frequency data analysis and capture, and implementing state-of-the-art micro frontends for trade management.
If you are a skilled professional with a keen interest in crypto trading and automation through algo bots, we look forward to hearing from you.
About The Role:
We seek a Python quant developer to join our Strategy Services team at Quant Platform. In this role, you will collaborate on our top-tier strategy-container technology, enabling traders and strategists to conceive, implement, test, and roll out quantitative trading strategies.
Responsibilities:
- Oversee and contribute to the exclusive strategy service solution driving all our quantitative trading strategies.
- Develop and deliver tech solutions that prioritize usability, scalability, and low latency.
- Systematically assess and monitor internal market data and order latency.
- Collaborate with a proficient team boasting a wealth of experience from prestigious investment banks and hedge funds.
Requirements:
- Strong educational background in STEM (Science/Technology/Engineering/Mathematics).
- Exceptional logical reasoning and problem-solving capabilities.
- Proficiency in high-performance engineering through Python and async programming patterns.
- Knowledge of distributed systems and microservice architecture.
- Experience in implementing automated testing and continuous integration.
- Proficiency in operating within a POSIX environment.
- Eagerness to cultivate expertise in various trading products across financial and crypto markets, encompassing spot, future, swap, options, structured products, and DeFi trading.
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