Core Developer (Python)

Status
London, UK
Full time
Hybrid
Compensation is not specified
Role
Backend Engineer
Description

About Wintermute

Wintermute is a prominent firm specializing in crypto-native algorithmic trading within the digital assets realm. Our expertise lies in providing algorithms for liquidity across a wide array of cryptocurrency exchanges and trading platforms. In addition, we offer diverse OTC trading solutions and extend support to prominent blockchain initiatives and traditional financial entities entering the crypto sphere. Wintermute Venture's subsidiary focuses on early-stage DeFi project investments.

Established in 2017 by respected individuals in the industry, Wintermute has adeptly maneuvered through various cycles within the crypto field. Our organizational culture embodies a blend of the esteemed technological standards present in high-frequency trading institutions within traditional markets and the forward-thinking, entrepreneurial ethos of technology startups. For Wintermute, digital assets hold substantial innovative promise beyond a mere asset category; we uphold a profound long-term perspective on the digital asset landscape and drive to lead the way in fostering an innovative and compliant market.

Working at Wintermute

We seek a Core Developer to spearhead the creation of an automated trade reconciliation system. This greenfield endeavor involves close collaboration with the Head of Core Development, CTO, Middle Office Lead, and traders.

The initiative aims to synchronize order and transfer details from the extensive array of cryptocurrency exchanges we engage with, thus generating near-live middle office confirmations, reconciled positions, real-time alerts, and historical reports. Operating on a Linux platform, the primary development language will be Python, interacting with a C++ stack, while delivering a highly efficient solution capable of reconciling a substantial volume of up to 100M transactions daily.

Ideal for individuals with a knack for Python and an interest in constructing cutting-edge high-performance systems and advancing knowledge in system architecture, finance, and trading, prior experience in crypto exchanges is not mandatory, although enthusiasm for financial and crypto markets is advantageous.

Hard skills requirements

  • A minimum of 3 years' proficiency in Python 3 development (inclusive of academic or personal projects)
  • Familiarity with reconciliation, risk, or other middle-office systems
  • Proficiency in constructing/updating and utilizing SQL-based databases
  • Profound Linux familiarity on desktops and servers
  • Competency in git or any other source versioning systems
  • Interest in algorithmic trading and financial markets
  • Additional C++ proficiency would be a benefit, albeit not crucial

Join our vibrant team and gain access to:

  • Exposure to one of the leading global trading entities
  • Engaging projects enabling swifter progression and accountability compared to traditional financial settings
  • A lively work ambiance inclusive of team meals, celebratory events, gaming sessions, and company-wide trips, including our annual Wintermute weekend sojourn
  • A London-based office with Wintermute-inspired designs, offering various amenities such as table tennis, foosball, personalized desk setups, a cozy collective area with games, and complimentary snacks
  • A fantastic organizational culture characterized by informality, ambition, professionalism, a startup ethos, collaboration, and entrepreneurial spirit
  • Performance-driven compensation with promising earning prospects alongside standard perks like pension and private health insurance

Note:

  • Full remote roles are not accepted, although considerable flexibility is allowed for remote work and flexible working hours
  • Assistance with UK work permits and relocation support is provided

Find out more:

  • Website
  • Twitter
  • LinkedIn
  • Youtube
  • Discover our open positions
Skills Required
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Wintermute
Company size
Not specified
Location
United States
Description
Not specified
Status

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Senior Blockchain Engineer - Low-Latency Execution Infrastructure (HyperEVM / Hyperliquid)

Full time
Remote
 
 
we’re looking for a senior blockchain engineer to build low-latency execution infrastructure around hyperevm and hyperliquid-related trading systems.
 
this is not a frontend or dapp role. the focus is on real-time execution systems, chain-native infrastructure, and market-aware backend engineering where latency, ordering, and state correctness directly impact execution outcomes.
 
you will work on systems that operate under noisy, adversarial, and highly dynamic conditions, including delayed or missing websocket events, rpc inconsistencies, transaction lifecycle complexity, state desynchronization, retries, and recovery logic.
 
core responsibilities include building and maintaining realtime blockchain data pipelines, websocket and rpc streaming systems, execution orchestration layers, liquidity-aware routing logic, transaction lifecycle management, and integration with orderbook and market data systems.
 
we are specifically looking for engineers who think in systems rather than features. meaning understanding how data flows through pipelines, how state evolves over time, how failures propagate, and how to design systems that recover automatically without manual intervention.
 
areas of work include:
 
- realtime blockchain data ingestion
- mempool-aware execution flows
- transaction lifecycle handling
- execution sequencing and routing
- websocket and rpc infrastructure
- state synchronization systems
- liquidity and orderbook integration
- performance and latency optimization
 
you should be comfortable working with distributed systems, asynchronous event processing, and latency-sensitive backend architectures.
 
strong experience in one or more of the following areas is highly relevant:
 
- exchange infrastructure
- trading systems
- execution engines
- blockchain indexers
- realtime event systems
- arbitrage systems
- rpc/node infrastructure
- defi backend systems
- low-latency backend engineering
 
preferred technical stack:
 
- typescript / node.js
- go
- rust
- python
- postgres
- clickhouse
- redis
- kafka or similar messaging systems
- docker
- linux environments
- evm rpc internals
- websocket infrastructure
 
ecosystem familiarity:
 
- ethereum, arbitrum, base, optimism, bsc
- hyperliquid / hyperevm
- foundry
- ethers.js / viem
- geth / erigon / nethermind
- dex and amm mechanics
- liquidity math, slippage, gas strategy, routing logic
 
this role is not suitable for:
 
- frontend-only developers
- nft or basic dapp experience only
- tutorial-level web3 developers
- candidates without production systems experience
 
we value engineers who have built real systems where correctness, latency, and reliability matter under load. we care less about buzzwords and more about concrete systems you have personally built and operated.
 
ideal candidates can clearly explain:
 
- system architecture decisions
- bottlenecks and tradeoffs
- failure modes and recovery strategies
- latency considerations in real systems
- production debugging experience
 
working style:
 
- remote
- async-first
- low bureaucracy
- high ownership
- engineering-driven team
- direct technical communication
 
we strongly prefer practical engineering depth over polished presentation. if you have built or worked on systems involving realtime data, trading infrastructure, blockchain execution, or latency-sensitive backend systems, please include details of those systems when applying.
 
Payment in Crypto
6,000-13,500
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Blockchain Engineer ‑ Copy-Trade Protocol at Zignaly

Singapore
Singapore
Full time
Remote
Mission:Emit immutable trade clones at the speed of mempools. Engineer on-chain vault + relay contracts that ingest master signals, laser-bridge them across EVM chains, and absorb slippage, MEV, and NFL Sunday-level volatility without exposing followers to liquidation contagion.
Stack & Level Requirements
Solidity 0.8.25+ via Foundry toolchain (Forge, Anvil, Cast) or Rust/Anchor on Solana
Proficiency: Huff / Yul inlines for gas micro-optimisations, EIP-712 signing, EIP-1167 minimal proxies
Cross-layer bridges: LayerZero, Wormhole, CCIP + custom relayers for <2 s finality
MEV-Geth style searchers – understand sandwich mechanics to architect commit-reveal patterned entry pools
Price oracles: Chainlink CCIP-read, Pyth, custom tick-level fallback for sub-$0.05 deviation error in volatility freak events
Security toolkit: Slither, Mythril, Echidna fuzz 1e6 vars/run, invariant bracelets as code
Gas profiling: forge-std Vm for on-chain gas snapshots pre-per-release hook
Hard-Check Trader DNA
⚔️ You have personally executed >$10 k notional on perpetuals & on-chain or cross-margined DeFi strategies with stress traces or Etherscan proof of addr.
⚔️ You’ve felt (or caused) impermanent loss >10 % in a single block.
⚔️ Optional but revered: vault or strategy on DeFiLlama/Apeboard with >$50 k TVL linked to your keys.
Responsibilities
Build gas-constrained e2e testnets atop Anvil mainnet fork for every release candidate.
Continuous white-hat review loop – both formal (Certora specs) & red-team bounty (Immunefi).
Coordinate with backend for off-chain signatures (EIP-712 typedData balancers).
Draft governance & upgrade timelocks (OpenZeppelin UUPS).
Be on-call for on-chain incidents (failed Oracle, stuck bridge, keeper tottering). with protocol parameters YAML files.
Soft Enemies – Don’t apply 
ifYou only deployed ERC-20 tokens and never** felt liquidation missiles.
You ignore MEV game theory.
Perks / Weapons Cache
Hardware fund: Apple M Max + 64 GB RAM, 10 Gbps fibre hookup.
Personal copy-trading gas allowance 1 k USD monthly – trade openly on testnet, share P&L in public.
Health stipend for red-eye debugging—includes premium dark-coffee & builder-milk.
Additional 1 % of inflation-scheduled supply upon achieving $100 m copy-AUM on ETH L2.
Apply Now
Attach:
Your latest CV. 
Etherscan link to your most brutal trading bot / vault (& TVL proof). 
GitHub repo (>20 stars) or archived PR of previous audited live contract address. 
Recorded deep-dive Loom of <180 s showing circuit breaker you built.
Cut-over: Applications stack-ranked & closed within 7 calendar days or when 3 offers signed—whichever happens first. Ready to ship settlement layer blood sport? 💥☠
Payment in Crypto
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Web3 Developer - WhiteBit

Full time
Remote
At Whitechain, we’re on a mission to revolutionize blockchain, smart contracts, and cryptography. As part of the WhiteBIT ecosystem, we’re building cutting-edge Web3 solutions, from our own EVM blockchain to non-custodial wallets, DeFi platforms, and GameFi experiences.
We’re looking for a skilled and motivated Blockchain / Web3 Developer to help us design, build, and improve scalable blockchain products and infrastructure. If you’re passionate about decentralization, smart contracts, EVM ecosystems, and the future of digital finance, this is your opportunity to make a real impact.
The future of Web3 starts with you — join us as a Blockchain / Web3 Developer!
Requirements
3+ years of software development experience
1–2+ years of experience in blockchain, Web3, crypto, or DeFi projects
Strong experience with Solidity and smart contract development in the EVM ecosystem
Good understanding of Ethereum / EVM architecture, gas optimization, token standards, and smart contract security
Experience with Web3 tools such as Hardhat, Foundry, Remix, MetaMask, Ethers.js, Web3.js, Viem
Experience deploying and maintaining smart contracts on testnet and mainnet
Knowledge of DeFi: AMMs, staking, lending, bridges, oracles, stablecoins, and liquidity pools
Backend integration experience: APIs, indexers, event listeners, wallets, or transaction services
Understanding of common blockchain security risks
Experience with JavaScript, TypeScript, Python, Node.js, or similar backend technologies
Familiarity with Git, CI/CD, testing frameworks, code reviews, and documentation
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Design, develop, test, and deploy smart contracts for Whitechain and Web3 products
Build blockchain features for DeFi platforms, wallets, GameFi, and ecosystem tools
Write secure and gas-efficient Solidity code
Create unit tests, integration tests, and deployment scripts
Integrate smart contracts with backend services, frontend apps, wallets, APIs, and blockchain infrastructure
Review existing smart contract code and suggest improvements
Support audits, security reviews, and vulnerability remediation
Monitor deployed contracts and help resolve production issues
Research new blockchain protocols, DeFi mechanics, and EVM improvements
Contribute to technical documentation and best practices
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Experience with L1 / L2, rollups, bridges, validators, nodes, or RPC infrastructure
Experience with audit tools such as Slither, Mythril, Echidna, Tenderly, or OpenZeppelin Defender
Knowledge of The Graph, SubQuery, custom indexers, or blockchain analytics pipelines
Experience with account abstraction, cross-chain protocols, or oracle integrations
Open-source Web3 contributions or a public GitHub portfolio
Understanding of tokenomics, staking, governance, or protocol economics
Experience in fintech, crypto exchange, DeFi, wallet, or Web3 infrastructure companies
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Smart Contract Engineer

Part time
Remote
Company Information
RWAHub is a Web3 platform focused on real-world asset (RWA) tokenization, bridging traditional assets such as real estate, luxury goods, and art with blockchain technology.
We are building a scalable decentralized ecosystem that enables asset owners, investors, and DeFi participants to interact in a unified, transparent marketplace powered by tokenized finance.
Our mission is to improve accessibility, liquidity, and transparency in global asset ownership using blockchain infrastructure.
For general inquiries, contact:
support@rwahubassets.com
Senior Blockchain Developer
Location: Remote (Global)
Type: Full-time / Part-time
About the Role
We are hiring a Senior Blockchain Developer to design and build smart contract systems across multiple client and internal projects.
You will work on a variety of blockchain applications - from DeFi protocols to tokenized asset systems and Web3 platforms - ensuring high standards in security, scalability, and architecture.
This is a senior-level, hands-on role with exposure to multiple products and industries.
What You’ll Do
Design, develop, and deploy smart contracts using Solidity
Implement token standards (ERC-20, ERC-721, ERC-1155) and custom logic
Build and maintain contract architectures across multiple projects
Ensure security, audit readiness, and upgradeability
Optimize gas usage and performance
Collaborate with backend and frontend teams for integrations
Participate in code reviews and technical decision-making
Contribute to documentation and internal best practices
What We’re Looking For
4+ years of experience in blockchain / smart contract development
Strong expertise in Solidity and EVM-based ecosystems
Experience with Ethereum and L2s (Polygon, Arbitrum, Optimism)
Strong understanding of smart contract security and vulnerabilities
Experience with Hardhat, Foundry, or similar frameworks
Strong software engineering fundamentals (testing, Git, CI/CD)
Ability to work across multiple projects and adapt quickly
Nice to Have
Experience with DeFi protocols, staking, or token economies
Experience working with auditors or security reviews
Familiarity with upgradeable contracts (proxy patterns)
Backend experience (Node.js / TypeScript)
Experience in client-facing or consulting environments
Tech Stack
Solidity · Ethereum · Polygon · Arbitrum
Hardhat / Foundry · Node.js · TypeScript
React · ethers.js · IPFS
Why Join
Work across a diverse portfolio of blockchain projects
Exposure to both client work and internal ventures
Opportunity to influence architecture and technical direction
Collaborative, globally distributed team
Fast-paced environment with continuous learning
What Success Looks Like
Secure, production-ready smart contracts delivered across projects
Successful audits with minimal critical issues
Scalable and reusable contract architectures
Strong collaboration with cross-functional teams
Consistent delivery across multiple initiatives
Hiring Process
Application review
Technical screening (take-home task)
Technical interview (Solidity & architecture)
Final discussion
How to Apply
Please submit:
Resume or LinkedIn
GitHub profile (required)
Examples of smart contracts or blockchain projects
📩 Applications & inquiries: support@rwahubassets.com
Payment in Crypto
10,000-15,000
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Business development Manager

Full time
Remote
Hey everyone,
 
I’m looking for recommendations or to connect directly with a marketing team / agency that genuinely understands the Forex trading space — especially community-led growth.
 
I run many public XAUUSD signals Telegram channel that has grown organically to 12,000+ members over the years (since 2020). No ads, no clickbait, no fake screenshots. The channel is completely free and will stay that way because the core idea has always been transparency and live testing rather than selling promises.
 
A few things about the community:
 
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• Consistent average accuracy around ~78%
 
• Clear risk management & lot sizing shared with every setup
 
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• Everything is public so anyone can track performance in real time for as long as they want
 
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• Know how to position transparency as a strength (not fake luxury marketing)
 
• Have experience with Telegram / Instagram / Reddit / Trading communities
 
If you’re a marketer in this niche, or you’ve worked with someone solid before, I’d really appreciate guidance, referrals, or a conversation.
 
Thanks in advance 🙏
 
Happy to share more details in DMs.
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