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
Ment Tech
Senior Software Engineer (Blockchain)
Mumbai, India +3
Mumbai, India +3
Full time
Remote
About MentTech
MentTech is a forward-thinking technology company dedicated to transforming how mentoring and learning are delivered in the digital age. By combining advanced tools, intelligent systems, and a human-first approach, MentTech helps individuals, teams, and organizations harness the power of mentorship to unlock potential, build skills, and achieve lasting growth.
The Role
We are seeking a Smart Contract Developer responsible for ensuring that game listings within MentTech work properly and ensuring compliance with all game store policies.
Key Responsibilities:
• Architect, implement, and deploy secure smart contracts for an on-chain Play-to-Earn GameFi ecosystem
• Lead contract design decisions with a focus on robustness, auditability, gas efficiency, and resilience to attack vectors
• Mentor/junior developers: perform code reviews, establish standards, best practices in security & testing
• Collaborate cross-functionally with game designers, backend, QA, and security teams to align smart contract features with product roadmap
Qualifications:
• 2+ years hands‐on experience developing & deploying smart contracts (Solidity / EVM or equivalent) in production environments
• Track record of writing secure contracts, familiarity with common vulnerabilities (reentrancy, integer over/underflow, front-running, flash loans, etc.)
• Experience with audits, formal verification, fuzz testing, or other advanced contract assurance methods
• Strong test suite / CI workflow skills; comfortable using tools like Hardhat, Foundry, Truffle etc.
• Solid understanding of GameFi mechanics and how on-chain economics work
Bonus Points:
• Experience on multiple EVM chains or Layer-2 / sidechains
• Knowledge of cross-chain bridges, oracles, NFTs, tokenomics design
• Contributions to open-source security tooling or prior audit reports or published code you’re proud of
Why join MentTech?
At MentTech, we cultivate a culture of flexibility, autonomy, and the freedom to make a real impact on the broader Web3 ecosystem. Experience the advantages of a fully remote working environment where your expertise and contributions are rewarded with competitive compensation tailored to your role and project influence.
Ment Tech Labs
• Employee Equity & Incentives: Unlock future growth with equity and other potential incentives.
• Entrepreneurial Culture: Join a collaborative environment where we innovate together as partners.
• Cutting-edge Innovation: Work at the forefront of gaming and blockchain.
• Key Strategic Projects: Be part of transformative initiatives that are redefining the gaming landscape.
• Remote Flexibility: Enjoy a truly flexible, fully remote work setup that supports your lifestyle.
• Talented Team: Collaborate with a team of passionate, driven, and skilled professionals.
• Community Impact: Contribute to the growth and success of the Web3 and gaming communities.
• Flexible Payment Options: Receive payments in crypto or fiat, tailored to your preference.
• Growth Opportunities: Access valuable learning experiences and development paths.
MentTech Labs, Inc. is an equal opportunities workplace that doesn’t discriminate based on race, ethnicity, gender, ancestry, national origin, religion, sex, sexual orientation, gender identity, age disability, veteran status, genetic information, marital status, or any other legally protected status.
MentTech is a forward-thinking technology company dedicated to transforming how mentoring and learning are delivered in the digital age. By combining advanced tools, intelligent systems, and a human-first approach, MentTech helps individuals, teams, and organizations harness the power of mentorship to unlock potential, build skills, and achieve lasting growth.
The Role
We are seeking a Smart Contract Developer responsible for ensuring that game listings within MentTech work properly and ensuring compliance with all game store policies.
Key Responsibilities:
• Architect, implement, and deploy secure smart contracts for an on-chain Play-to-Earn GameFi ecosystem
• Lead contract design decisions with a focus on robustness, auditability, gas efficiency, and resilience to attack vectors
• Mentor/junior developers: perform code reviews, establish standards, best practices in security & testing
• Collaborate cross-functionally with game designers, backend, QA, and security teams to align smart contract features with product roadmap
Qualifications:
• 2+ years hands‐on experience developing & deploying smart contracts (Solidity / EVM or equivalent) in production environments
• Track record of writing secure contracts, familiarity with common vulnerabilities (reentrancy, integer over/underflow, front-running, flash loans, etc.)
• Experience with audits, formal verification, fuzz testing, or other advanced contract assurance methods
• Strong test suite / CI workflow skills; comfortable using tools like Hardhat, Foundry, Truffle etc.
• Solid understanding of GameFi mechanics and how on-chain economics work
Bonus Points:
• Experience on multiple EVM chains or Layer-2 / sidechains
• Knowledge of cross-chain bridges, oracles, NFTs, tokenomics design
• Contributions to open-source security tooling or prior audit reports or published code you’re proud of
Why join MentTech?
At MentTech, we cultivate a culture of flexibility, autonomy, and the freedom to make a real impact on the broader Web3 ecosystem. Experience the advantages of a fully remote working environment where your expertise and contributions are rewarded with competitive compensation tailored to your role and project influence.
Ment Tech Labs
• Employee Equity & Incentives: Unlock future growth with equity and other potential incentives.
• Entrepreneurial Culture: Join a collaborative environment where we innovate together as partners.
• Cutting-edge Innovation: Work at the forefront of gaming and blockchain.
• Key Strategic Projects: Be part of transformative initiatives that are redefining the gaming landscape.
• Remote Flexibility: Enjoy a truly flexible, fully remote work setup that supports your lifestyle.
• Talented Team: Collaborate with a team of passionate, driven, and skilled professionals.
• Community Impact: Contribute to the growth and success of the Web3 and gaming communities.
• Flexible Payment Options: Receive payments in crypto or fiat, tailored to your preference.
• Growth Opportunities: Access valuable learning experiences and development paths.
MentTech Labs, Inc. is an equal opportunities workplace that doesn’t discriminate based on race, ethnicity, gender, ancestry, national origin, religion, sex, sexual orientation, gender identity, age disability, veteran status, genetic information, marital status, or any other legally protected status.
Payment in Crypto
HubsAI
Senior web3 engineer
Treynor, USA
Treynor, USA
Part time
Remote
About the Project:
We’re building a SocialFi platform combining real estate and DeFi. After launching our MVP, we’re now progressing to version 2.
Role:
Join our remote team to develop website, smart contracts, integrate blockchain features, and ensure platform security.
Responsibilities:
- Develop and deploy smart contracts on Ethereum or Layer 2.
- Integrate wallet connect and decentralized features.
- Collaborate and direct contribute with frontend/backend teams.
- Conduct security audits.
Requirements:
- Experience with React, Ethers.js, Web3.js.
- Familiarity with wallet extensions and DeFi protocols.
- Ability to fix errors within 1 hour during tests.
- Comfortable working independently in a remote setup.
Nice to Have:
- Knowledge of cross-chain protocols or cryptography.
- Experience in social finance or real estate blockchain projects.
Application:
Send your resume and Linkedin profile. Selected candidates will do a quick coding test.
Contact: contact@hubsai.net
Join us to help shape the future of SocialFi!
We’re building a SocialFi platform combining real estate and DeFi. After launching our MVP, we’re now progressing to version 2.
Role:
Join our remote team to develop website, smart contracts, integrate blockchain features, and ensure platform security.
Responsibilities:
- Develop and deploy smart contracts on Ethereum or Layer 2.
- Integrate wallet connect and decentralized features.
- Collaborate and direct contribute with frontend/backend teams.
- Conduct security audits.
Requirements:
- Experience with React, Ethers.js, Web3.js.
- Familiarity with wallet extensions and DeFi protocols.
- Ability to fix errors within 1 hour during tests.
- Comfortable working independently in a remote setup.
Nice to Have:
- Knowledge of cross-chain protocols or cryptography.
- Experience in social finance or real estate blockchain projects.
Application:
Send your resume and Linkedin profile. Selected candidates will do a quick coding test.
Contact: contact@hubsai.net
Join us to help shape the future of SocialFi!
Payment in Crypto
Michael Har
Junior / Middle Metaverse Developer (Unity / Web3 / VR)
Manzhouli, China
Manzhouli, China
Full time
Remote
We are looking for a Metaverse Developer to help build interactive virtual environments and immersive digital experiences. The role involves developing 3D worlds, integrating Web3 technologies, and working with modern tools for real-time applications.
You will work with Unity, WebGL, and blockchain technologies to create engaging metaverse features and optimize them for performance across different devices. The developer will collaborate with designers and backend engineers to deliver scalable and stable products.
Requirements include experience with Unity and C#, understanding of 3D development, Web3 or blockchain basics, and familiarity with Git and API integration. Experience with VR/AR, NFTs, or multiplayer systems is a plus.
We offer remote work, flexible hours, crypto payments, and the opportunity to build innovative metaverse products.
You will work with Unity, WebGL, and blockchain technologies to create engaging metaverse features and optimize them for performance across different devices. The developer will collaborate with designers and backend engineers to deliver scalable and stable products.
Requirements include experience with Unity and C#, understanding of 3D development, Web3 or blockchain basics, and familiarity with Git and API integration. Experience with VR/AR, NFTs, or multiplayer systems is a plus.
We offer remote work, flexible hours, crypto payments, and the opportunity to build innovative metaverse products.
Payment in Crypto
Sirex
Junior/Mid Decentralized Infrastructure Engineer
Full time
Remote
Role:
Help build and scale decentralized infrastructure: contribute to compute networks, protocols, storage layers, and orchestration tools that power AI agents and open digital systems. You’ll write code, run tests, fix bugs, and ship real features fast.
Skills & Requirements:
1–3 years in blockchain infra, distributed systems, or high-scale compute (or strong personal projects)
Solid Python / Rust / Go skills
Interest in libp2p, IPFS, GPU orchestration, or decentralized compute
Quick learner who ships clean code and loves performance/cost challenges
Salary:
$110,000 – $165,000 USD base + meaningful equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug strong builders straight into our portfolio companies.
This is your chance to work on the real infrastructure behind autonomous agents and the open digital economy. Full support from the Sirex team, fast growth, zero bureaucracy.
High risk. Zero apologies.
Help build and scale decentralized infrastructure: contribute to compute networks, protocols, storage layers, and orchestration tools that power AI agents and open digital systems. You’ll write code, run tests, fix bugs, and ship real features fast.
Skills & Requirements:
1–3 years in blockchain infra, distributed systems, or high-scale compute (or strong personal projects)
Solid Python / Rust / Go skills
Interest in libp2p, IPFS, GPU orchestration, or decentralized compute
Quick learner who ships clean code and loves performance/cost challenges
Salary:
$110,000 – $165,000 USD base + meaningful equity (portfolio startup) + full benefits + Sirex carry
Description:
Sirex.vc doesn’t just invest — we plug strong builders straight into our portfolio companies.
This is your chance to work on the real infrastructure behind autonomous agents and the open digital economy. Full support from the Sirex team, fast growth, zero bureaucracy.
High risk. Zero apologies.
Payment in Crypto
Neonflick
Web3 Fullstack Developer
Part time
Remote
🌐 About Us
Neonflick is a tech organization specializing in Web3 development.
We believe Web3 solutions are not as popular as they could be — mainly due to complexity. Our mission is to simplify the user experience and make decentralized technology more accessible and easy to use for everyone.
🚀 About the Role
We are looking for a Web3 Fullstack Developer who is passionate about decentralized technologies and excited to contribute to building meaningful Web3 products. You will work on developing new products, improving existing ones, and fixing bugs, all while proposing innovative ideas to enhance our platform.
🔹 Responsibilities
Develop functional and user-friendly Web3 products
Improve and optimize existing products and features
Identify and fix bugs or issues in the system
Propose and implement new ideas for product development
Collaborate with the team to ensure high-quality software delivery
🔹 Requirements
Strong interest in Web3 / blockchain / decentralized technologies
Fullstack development experience (frontend + backend)
Experience with smart contracts and decentralized frameworks is a plus
Problem-solving skills and attention to detail
Ability to work independently and proactively
🔹 What You Get
Early-stage involvement in a Web3 tech organization
Influence over product development and feature design
Opportunity to build experience and a portfolio in the Web3 space
Potential long-term collaboration and future compensation as the project grows
A chance to contribute to making Web3 simpler and more accessible
⚠️ Important
This is an unpaid position. We are looking for someone motivated by vision, learning, and long-term impact rather than immediate salary.
If you are passionate about Web3 and building meaningful decentralized products, we’d love to hear from you.
Neonflick is a tech organization specializing in Web3 development.
We believe Web3 solutions are not as popular as they could be — mainly due to complexity. Our mission is to simplify the user experience and make decentralized technology more accessible and easy to use for everyone.
🚀 About the Role
We are looking for a Web3 Fullstack Developer who is passionate about decentralized technologies and excited to contribute to building meaningful Web3 products. You will work on developing new products, improving existing ones, and fixing bugs, all while proposing innovative ideas to enhance our platform.
🔹 Responsibilities
Develop functional and user-friendly Web3 products
Improve and optimize existing products and features
Identify and fix bugs or issues in the system
Propose and implement new ideas for product development
Collaborate with the team to ensure high-quality software delivery
🔹 Requirements
Strong interest in Web3 / blockchain / decentralized technologies
Fullstack development experience (frontend + backend)
Experience with smart contracts and decentralized frameworks is a plus
Problem-solving skills and attention to detail
Ability to work independently and proactively
🔹 What You Get
Early-stage involvement in a Web3 tech organization
Influence over product development and feature design
Opportunity to build experience and a portfolio in the Web3 space
Potential long-term collaboration and future compensation as the project grows
A chance to contribute to making Web3 simpler and more accessible
⚠️ Important
This is an unpaid position. We are looking for someone motivated by vision, learning, and long-term impact rather than immediate salary.
If you are passionate about Web3 and building meaningful decentralized products, we’d love to hear from you.