Senior Python Software Engineer - Web3, DeFi
About Clearmatics
Clearmatics is a company that specializes in building decentralized financial market infrastructures using blockchain technology. Their goal is to create market structures that are more open, efficient, and resilient than traditional systems.
Clearmatics has a vision to address the unmet needs of the real economy by enabling market participants to solve problems through peer-to-peer trading and settlement within new markets. They aim to achieve this by using digital assets that track real-world risk factors that are not currently addressed in legacy markets.
Clearmatics has been actively involved in open-source development, blockchain, and cryptography research communities since its founding in 2015. They are now expanding their team and seeking a Senior Python Software Engineer to join them on their journey.
Responsibilities:
The Senior Python Software Engineer will be responsible for developing and maintaining command-line tools, API servers, and Python SDKs that will serve as the main interface for Clearmatics' end-users. These tools and services will enable the creation of decentralized risk markets and a new market structure for decentralized finance (DeFi) on the Autonity blockchain.
Requirements:
- Minimum of 5 years of professional software development experience.
- Minimum of 2 years of professional experience in Python software development.
- Bachelor's degree in Computer Science or a related technical field.
- Strong Python skills with expertise in network and concurrent programming.
- Understanding of Ethereum protocols and proof of stake consensus.
- Experience in developing REST APIs, backend services, and automated pipelines.
- Proficiency in SQL databases, GraphQL sources, and time series data.
- Good knowledge of Unix shell scripting and command-line tools.
- Familiarity with centralized/decentralized trade lifecycle and common DeFi protocols.
- Excellent attention to detail and commitment to software correctness.
Bonus Points:
- Contribution to open-source projects in the Web3 space.
- Experience in developing DeFi trading tools or frameworks.
- Proficiency in Python scientific computing stack (NumPy, Pandas, Jupyter).
- Solidity smart contract programming experience.
- Programming experience in a systems language like Go, Rust, or C++.
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”
Community & Growth Lead
Sirex Portfolio Companies Salary: $110,000 – $155,000 USD base + equity + token package Location: Remote-first
About the role Own community strategy and growth for 2–3 portfolio projects (AI agents, RWA platforms, DeFi protocols).
What you’ll do
Build and scale Telegram, Discord, X and on-chain communities
Run engagement campaigns, AMAs, airdrops and incentive programs
Create content calendars and growth experiments
Track metrics and report directly to founders
Requirements
3+ years community/growth experience in Web3
Proven track record of growing communities from 0 to 10k+ active members
Strong writing and meme/game theory skills
Apply → Send CV