DeFi Protocol Engineer - Ethereum, Python
About Clearmatics
Clearmatics is a company that specializes in building decentralized financial market infrastructures using blockchain technology. Our mission is to create open, efficient, and resilient market structures that address the currently unmet needs of the real economy. We achieve this through peer-to-peer trading and settlement in new markets, using digital assets that accurately represent real-world risk factors. We work closely with trading and blockchain communities to develop this new infrastructure. Clearmatics was founded in 2015 and is actively involved in open-source development, blockchain research, and decentralized infrastructure initiatives.
We are currently seeking a skilled engineer to join our Layer 1 Engineering team as a DeFi Protocol Engineer. As our stack is similar to Ethereum, it is crucial for the candidate to have familiarity with and passion for the space.
Responsibilities
As a DeFi Protocol Engineer, you will be responsible for designing and prototyping decentralized financial protocols on Autonity. These protocols will enable the creation of decentralized risk markets for real-world risk factors. You will work on a variety of problems, including smart derivatives, DEX trading and settlement protocols, algorithmic stabilization, data oracles, liquid staking, and more. You will collaborate with smart contract engineers to provide technical design expertise and contribute to the Solidity code base. Additionally, you will work with quantitative researchers to develop new models and simulations and support research efforts. You will also produce technical design specifications for external publication and internal use. Staying up-to-date with developments in the DeFi and broader blockchain space is essential, as you will engage with the Autonity community to address protocol design challenges.
Requirements
To be successful in this role, you should meet the following requirements:
- Have at least 2 years of experience in designing, researching, or implementing DeFi protocols
- Hold a bachelor's degree in a relevant quantitative or computational field of study
- Possess a deep understanding of the DeFi landscape and major DeFi primitives
- Have knowledge of financial derivatives and quantitative finance fundamentals
- Be proficient in Python programming and web3.py Ethereum development
- Be skilled in using the Python scientific computing stack (NumPy, Pandas, Jupyter)
- Have the ability to clearly and concisely document and explain DeFi protocols
- Have a love for mathematics and be able to translate mathematical concepts into code
- Have experience analyzing timeseries and market data using SQL and GraphQL
Bonus Points
The following skills and experiences are considered a plus:
- Expertise in economics, game theory, applied cryptography, or distributed systems
- Experience in smart contract programming using Solidity in open-source Web3 projects
Our compensation is competitive within the blockchain industry and will be determined based on your skills and experience.
Senior Software Engineer (Blockchain)
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.
Product Manager – Portfolio Companies
Sirex Portfolio Companies
Salary: $135,000 – $190,000 USD base + equity
Location: Remote-first
About the role Own product strategy and roadmap for 1–2 portfolio projects (DeFi protocols, trading platforms or RWA infrastructure).
What you’ll do
Define vision, prioritize features and write specs
Work directly with smart-contract and frontend teams
Design user flows and drive product-market fit
Run user research and iterate fast
Requirements
4+ years Product Management experience
Previous Web3/DeFi product experience mandatory
Strong technical intuition
Apply → Send CV + 1 strongest product case
Frontend Engineer – Web3 Products
Sirex Portfolio Companies
Salary: $120,000 – $175,000 USD base + equity
Location: Remote-first
About the role Build beautiful, high-performance frontends for DeFi, RWA and agent platforms (Next.js + Wagmi/Viem stack).
What you’ll do
Ship trading interfaces, dashboards and wallet flows
Optimize for mobile and lightning-fast UX
Integrate with smart contracts and oracles
Work directly with design and product teams
Requirements
3+ years Next.js / React + TypeScript
Strong experience with Wagmi, Viem, RainbowKit or similar
Web3 product intuition (wallets, transactions, gas UX)
Apply → Send CV + GitHub
On-Chain Data Analyst
Sirex Fund + Portfolio
Salary: $110,000 – $160,000 USD base + equity
Location: Remote-first
About the role
Turn raw blockchain data into actionable investment insights and portfolio monitoring tools.
What you’ll do
Build and maintain Dune dashboards + custom indexers
Track TVL, user activity, token flows and protocol health
Create weekly investment memos and anomaly alerts
Support due diligence with on-chain forensics
Requirements
Strong SQL + Python experience
Deep knowledge of The Graph, Dune, Flipside or custom subgraphs
Previous crypto research or trading background
Apply → Send CV + 1 example Dune dashboard
Operations Associate / Chief of Staff
Sirex Fund Salary: $95,000 – $135,000 USD base + carry Location: Remote-first
About the role Be the right-hand person to partners: run fund operations, portfolio support and internal processes.
What you’ll do
Manage deal flow, data rooms and investment memos
Coordinate portfolio reporting and founder updates
Handle legal, compliance and admin tasks
Support events, LP communication and hiring
Requirements
2–4 years in VC, startup ops or consulting
Extremely organized and fast-moving
Web3/native crypto understanding is mandatory
Apply → Send CV + short note “Why you’d be a great CoS”