Software Engineer - Java/Python (Liquidity Management - DeFi Services)
Hong Kong
Full time
Office
Compensation is not specified
Role
Software Engineer
Description
About OKX:
At OKX, we believe that technology is transforming the future. Established in 2017, OKX is a leading cryptocurrency exchange that specializes in spot and derivatives trading. We have harnessed the power of blockchain technology to reshape the financial ecosystem, offering a diverse range of sophisticated products, solutions, and trading tools. Trusted by over 20 million users across 180 regions worldwide, OKX is committed to providing an engaging platform that empowers individuals in the world of crypto. Alongside our DeFi exchange, we also have a research arm called OKX Insights, which stays at the forefront of the latest cryptocurrency industry trends. With our comprehensive range of crypto products and services and our dedication to innovation, OKX envisions a financial landscape supported by blockchain technology and decentralized finance.
We invest in our people just as much as we invest in technology. Our culture fosters teamwork, embraces change, and prioritizes doing what's right. We are determined to create a friendly, fulfilling, and diverse environment for all OKX employees. Regardless of your background, everyone at OKX feels valued, respected, and has equal opportunities for development and success — we strive to bring out the best in you.
About the Opportunity
About the Quant Platform:
The Quant Platform offers cutting-edge technology that encompasses all aspects of crypto trading. We develop low-latency connectivity to global crypto exchanges, provide strategy services for automated pricing and trading bots, capture and analyze high-frequency data, and create state-of-the-art micro frontends for trading management.
If you are a skilled technologist who is passionate about the potential of crypto trading and interested in fully-automated algorithmic bots, we would love to have a conversation with you.
About the Role:
We are seeking a developer who is enthusiastic about developing trading algorithms and tackling unique challenges in the DeFi field. This role involves pushing the boundaries and blurring the line between DeFi and centralized venues.
What You'll Be Responsible For:
- Lead and contribute to the development of a new DeFi trading platform, identifying key opportunities in market-making and arbitrage using our proprietary trading technology
- Collaborate closely with engineers and strategists to research and develop trading strategies and generate alpha in the DeFi space
- Utilize technical skills to automate trading and establish connectivity with decentralized and centralized exchange venues
- Demonstrate creativity in identifying technical gaps and enhancing workflow efficiency, coverage, and the quality of our solutions
What We Seek in You:
- Strong educational background in STEM (Science/Technology/Engineering/Mathematics)
- Sound understanding of blockchain, smart contract technology, and crypto economics
- Proficiency in programming languages such as Python, Solidity, Java, Node.js, and Typescript
- Good knowledge of the DeFi ecosystem, including AMM Dexs and lending protocols, as well as their econometrics
- Comprehensive understanding of best practices such as test-driven development and CI/CD
- (Preferred) Experience in quantitative finance or working with crypto products
- (Preferred) Familiarity with tools like TheGraph, GraphQL, web3py, Brownie, apeWorx, web3j, Hardhat/Truffle, web3.js, ethers.js, and Rust
- (Preferred) Knowledge of data analysis using data frames and pandas
- (Preferred) Experience in systematic trading or high-frequency trading
Note: This is an onsite position. #LI-NN1 #LI-ONSITE
Skills Required
OKX
Website
www.okx.comCompany size
Not specified
Location
United States
Description
Not specified
Ismail Ahmad
Senior iOS developer for GameDev startup
Full time
Remote
Game Concept: “Reflex Arena”
Genre
Real-time competitive 1v1 / 2v2 skill-based action game
Platform
iOS (iPhone first, iPad optional)
Core Idea
A pure skill game where players compete in short, intense arena matches using precision timing, reflexes, and positioning — no RNG, no pay-to-win.
Each match lasts 60–90 seconds, making it ideal for mobile sessions while supporting competitive depth.
Core Gameplay Loop
Matchmaking
Skill-based MMR
Ranked & unranked queues
Arena Match
Small symmetrical arena
Players control a single character
Objective: score points by outplaying, not overpowering
Score & Progress
Win → rank up
Lose → learn (clear replay & stats)
Cosmetics only progression
Controls (Mobile-First, High Precision)
Left thumb: Movement (virtual joystick)
Right thumb: Aim + action swipe
Tap: Ability activation
Perfect timing windows reward precision (parries, counters)
👉 Designed to feel closer to a fighting game than a casual mobile title.
Mechanics (Skill > Stats)
Core Mechanics
Dash with cooldown (positioning skill)
Timed parry (frame-perfect defense)
Charged shots (risk vs reward)
Combo chaining (execution mastery)
No Randomness
Fixed damage
Fixed cooldowns
No crit chance
No loot boxes
Competitive Depth
Skill Expression
Reaction time
Prediction & mind games
Spacing & arena control
Cooldown tracking
Skill Ceiling
Easy to learn (1 minute)
Hard to master (1000+ matches)
Game Modes
Ranked Duel (Main Mode)
1v1
Best of 3 rounds
Seasonal leaderboard
Team Arena
2v2 coordinated play
Shared objectives
Training / Practice
Frame timing visualizer
Ghost replays of top players
Visual Style
Clean, minimalistic sci-fi arenas
High contrast for readability
60–120 FPS target (ProMotion)
👉 Performance clarity > visual noise.
Monetization (Fair & Competitive)
Skins (characters, arenas, effects)
Emotes / victory poses
Battle pass (cosmetic only)
🚫 No power boosts
🚫 No energy timers
🚫 No loot RNG
Technical Design (iOS-Optimized)
Native Swift
Metal / SpriteKit
Deterministic simulation
Server-authoritative logic
Rollback netcode (if real-time PvP)
Genre
Real-time competitive 1v1 / 2v2 skill-based action game
Platform
iOS (iPhone first, iPad optional)
Core Idea
A pure skill game where players compete in short, intense arena matches using precision timing, reflexes, and positioning — no RNG, no pay-to-win.
Each match lasts 60–90 seconds, making it ideal for mobile sessions while supporting competitive depth.
Core Gameplay Loop
Matchmaking
Skill-based MMR
Ranked & unranked queues
Arena Match
Small symmetrical arena
Players control a single character
Objective: score points by outplaying, not overpowering
Score & Progress
Win → rank up
Lose → learn (clear replay & stats)
Cosmetics only progression
Controls (Mobile-First, High Precision)
Left thumb: Movement (virtual joystick)
Right thumb: Aim + action swipe
Tap: Ability activation
Perfect timing windows reward precision (parries, counters)
👉 Designed to feel closer to a fighting game than a casual mobile title.
Mechanics (Skill > Stats)
Core Mechanics
Dash with cooldown (positioning skill)
Timed parry (frame-perfect defense)
Charged shots (risk vs reward)
Combo chaining (execution mastery)
No Randomness
Fixed damage
Fixed cooldowns
No crit chance
No loot boxes
Competitive Depth
Skill Expression
Reaction time
Prediction & mind games
Spacing & arena control
Cooldown tracking
Skill Ceiling
Easy to learn (1 minute)
Hard to master (1000+ matches)
Game Modes
Ranked Duel (Main Mode)
1v1
Best of 3 rounds
Seasonal leaderboard
Team Arena
2v2 coordinated play
Shared objectives
Training / Practice
Frame timing visualizer
Ghost replays of top players
Visual Style
Clean, minimalistic sci-fi arenas
High contrast for readability
60–120 FPS target (ProMotion)
👉 Performance clarity > visual noise.
Monetization (Fair & Competitive)
Skins (characters, arenas, effects)
Emotes / victory poses
Battle pass (cosmetic only)
🚫 No power boosts
🚫 No energy timers
🚫 No loot RNG
Technical Design (iOS-Optimized)
Native Swift
Metal / SpriteKit
Deterministic simulation
Server-authoritative logic
Rollback netcode (if real-time PvP)
Payment in Crypto
Ahn Nahm
Rust/blockchain
Houston, USA
Houston, USA
Part time
Remote
I am seeking a world-class Systems Engineer / Rust Architect to build a proprietary asset extraction engine on the Solana network. This is not a "Web3 App" or a "DEX UI." This is a purely backend, low-latency machine designed to capture micro-value from market volatility.The system mimics a "digital sluice," using high-precision math to harvest fractional differences that standard rounded-math bots ignore. We are scaling from a prototype to a 30-node distributed network managing 100+ concurrent execution "hands."Core Technical RequirementsLow-Level Rust Mastery: You must be an expert in the Tokio runtime, asynchronous programming, and memory-safe mathematical operations.Solana Network Physics: Deep understanding of the Sealevel runtime, custom WebSocket/Lumen bridges, and avoiding gRPC bottlenecks.Jito & MEV Optimization: Proven experience with Jito Bundles, transaction shredding, and tip-optimization to ensure first-block inclusion.Distributed Orchestration: Ability to architect a master-node system that manages 30+ regional nodes with seamless failover and zero-loss state management.Precision Math: All logic must operate on u64 integers (Lamports) to avoid floating-point rounding errors. We do not "round" to the dollar; we capture the 9th decimal.Key ResponsibilitiesEngine Hardening: Audit and optimize the core Rust logic for 0-latency execution.Node Orchestration: Build the "Master Switch" to deploy, monitor, and update 30 nodes across global regions simultaneously.The "Tax" Logic: Implement a secure, automated "sweeper" protocol that collects fractional value from all child-nodes into a master treasury without interrupting execution.Redundancy: Ensure the system is "Anti-Fragile"—if a validator or node fails, the 50-drop safety protocol must trigger an instant failover.
Payment in Crypto
TA Quant
Frontend Developer
Full time
Remote
Create intuitive, responsive user interfaces that deliver exceptional user experiences across our platform. You'll transform designs into pixel-perfect, performant applications while ensuring smooth interactions and real-time data visualization. We're looking for developers who are passionate about user experience, have an eye for design details, and can build complex web applications that handle large datasets efficiently while maintaining responsive, accessible interfaces across all devices and browsers.
Responsibilities:
Build responsive, performant web applications
Implement designs with attention to UX detail
Integrate with backend APIs and manage application state
Ensure cross-browser compatibility and accessibility
Responsibilities:
Build responsive, performant web applications
Implement designs with attention to UX detail
Integrate with backend APIs and manage application state
Ensure cross-browser compatibility and accessibility
Payment in Crypto
TA Quant
LEAD Backend Engineer
Full time
Remote
Lead the architecture and development of our core backend systems, ensuring scalability, reliability, and performance across all services. You'll be responsible for making critical technical decisions, establishing engineering standards, and building systems that can handle massive scale. This role requires deep expertise in distributed systems, database design, and modern backend technologies, along with strong leadership skills to guide and mentor the engineering team.
Responsibilities:
Design and implement scalable backend architecture
Lead technical decisions and mentor backend team members
Optimize system performance and ensure high availability
Establish best practices for code quality and deployment
Responsibilities:
Design and implement scalable backend architecture
Lead technical decisions and mentor backend team members
Optimize system performance and ensure high availability
Establish best practices for code quality and deployment
Payment in Crypto
Lumixion.io
Frontend Web3 Engineer | React | Solidity, Ethereum, Solana
Remote, USA
Remote, USA
Full time
Remote
About the RoleWe are seeking a React Web3 Developer to build decentralized applications and integrate smart contracts across multiple blockchain platforms. Candidates may have experience with Solana, Ethereum, Solidity, or similar smart contract technologies.ResponsibilitiesDevelop and maintain Web3 applications using ReactIntegrate and interact with smart contracts on various blockchainsImplement wallet connections and on-chain interactionsCollaborate with product and blockchain teamsWrite clean, secure, and well-documented codeRequirementsStrong experience with React and modern frontend developmentExperience with any smart contract platform (Solana, Ethereum, Solidity, or similar)Familiarity with Web3 libraries (ethers.js, web3.js, wagmi, etc.)Solid understanding of blockchain fundamentals and dApp architectureAbility to work independently with strong communication skillsPreferredExperience with DeFi, NFT, or multi-chain applicationsFull-stack Web3 experienceHiring ProcessTechnical TaskShortlisted candidates will be given access to a public repository. The task is to:Review the codebase and suggest improvements and optimizationsShare recommendations and best practices based on the existing implementationInclude screenshots of the terminal and browser as references where applicableSubmissions must be shared as:A Google Docs link, orA PDF documentTechnical Interview with CTOA detailed technical interview will be conducted with our CTO. Topics will include:In-depth discussion of the candidate’s understanding of the reviewed codebaseApproach to development challenges and best practicesCultural and Work Environment Interview with CEOThe final stage involves a meeting with the CEO to evaluate:Cultural fit within the companyWork ethic and attitudeAlignment with company values and visionExpectations regarding work environment and team collaboration
Payment in Crypto