Senior Frontend Engineer, React

 
 
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.
 

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? 💥☠

We are looking for an experienced Blockchain Developer to join our development team and work on decentralized applications (DApps) and smart contract-based systems. 
You will be responsible for building and integrating blockchain-based features into modern web applications using Solidity, Web3 technologies, and MERN stack (React, Node.js, Express, MongoDB). 
 
 🚀 Responsibilities 
- Develop and deploy smart contracts using Solidity 
- Build and maintain Web3 integrations (ethers.js / wagmi / web3.js) 
- Implement wallet connection (MetaMask and similar wallets) 
- Develop responsive frontend interfaces using React + TailwindCSS 
- Work with backend APIs using Node.js / Express 
- Integrate blockchain data with backend systems when needed 
- Ensure security, efficiency, and scalability of smart contracts 
- Collaborate with UI/UX and backend developers
 
🧩 Required Skills 
- Strong experience in Solidity smart contract development 
- Experience with Web3 libraries (ethers.js, wagmi, or web3.js) 
- Solid understanding of Ethereum / EVM ecosystem 
- Experience with React.js and TailwindCSS 
- Knowledge of Node.js, Express, MongoDB (MERN stack) 
- Experience with wallet integrations (MetaMask, WalletConnect) 
- Understanding of smart contract security best practices
 
💡 Nice to Have 
- Experience with Hardhat or Foundry 
- Knowledge of DeFi, NFTs, or staking systems 
- Experience deploying to testnets (Sepolia, Polygon, etc.) 
- Familiarity with TypeScript 
- Experience with CI/CD for smart contracts

We are currently supporting a well-funded and established Web3 infrastructure company expanding a next-generation blockchain-powered gaming, betting, and prediction platform enhanced by AI-driven experiences. The platform brings together wallet connectivity, blockchain transactions, digital asset ownership, decentralized gaming mechanics, and prediction market participation into one scalable Web3 ecosystem designed for a global audience. As the platform continues to evolve, the team is looking for a Wallet Infrastructure Engineer to help strengthen wallet architecture, improve transaction flows, and support a seamless Web3 user experience across the platform. This role is ideal for someone with strong blockchain wallet experience who enjoys solving infrastructure and user experience challenges across wallet connectivity and on-chain interactions. The ideal candidate brings 9+ years of overall professional experience, including experience working in software, Web3, or blockchain-focused environments, along with practical knowledge of wallet infrastructure and user-facing blockchain products.
Responsibilities
Design and maintain wallet infrastructure across the platform
Support wallet connection flows across blockchain-based gaming and prediction products
Improve wallet onboarding, transaction signing, and overall user account experience
Work closely with engineering teams on wallet integrations, asset visibility, and blockchain transaction flows
Support infrastructure related to wallet providers, smart wallets, and digital asset ownership
Help improve transaction reliability, wallet security, and user experience across Web3 interactions
Collaborate with product and engineering teams on wallet-related features and delivery timelines
Review GitHub progress and coordinate with development teams on wallet-related initiatives
Help improve onboarding experiences for users interacting with blockchain products for the first time
Requirements
9+ years of overall professional experience, including software, blockchain, or technical product environments
Strong experience working with wallet infrastructure or blockchain account systems
Solid understanding of Web3 wallets, blockchain transactions, digital asset ownership, and wallet connectivity flows
Familiarity with wallet providers such as browser wallets, smart wallets, custodial wallets, or account abstraction ecosystems
Good understanding of blockchain networks and on-chain transaction behavior
Experience collaborating with engineering and product teams on Web3 or blockchain products
General familiarity with React.js and Node.js to understand platform workflows and collaborate with developers
Experience using GitHub to review project progress, issues, and technical collaboration
Previous exposure to gaming, digital assets, or Web3 consumer-facing products is a strong plus
Strong communication, ownership mindset, and ability to work effectively across teams
Benefits and Perks
Competitive compensation package with equity participation
Health, dental, and vision coverage
Unlimited PTO
Pension contribution
Remote-friendly environment with flexibility
Expense reimbursement for home internet and phone
Ongoing professional development and learning support
Opportunity to contribute to innovative Web3 products serving a global audience
Hiring Process
Introductory conversation
Technical discussions with the client team
Final alignment and offer discussions
If you have strong wallet infrastructure experience, enjoy improving Web3 user experience, and are interested in helping build innovative blockchain products used by a global audience, we’d love to hear from you.

Role OverviewKeras Labs is seeking a high-performing Blockchain Engineer to design, build, and scale smart contract systems for a hybrid AMM + perpetual trading platform powered by AI agents.This role also includes building and deploying standard token contracts (ERC20/BEP20) and supporting core on-chain infrastructure in a fast-paced, product-driven environment. Core ResponsibilitiesBuild and maintain smart contracts (Solidity / Rust)Develop and deploy ERC20 / BEP20 (or equivalent EVM) tokensImplement token logic (minting, burning, access control)Build core protocol modules (liquidity, trading, vaults)Integrate price oracles and on-chain data sourcesOptimize contracts for gas efficiency and performanceCollaborate with frontend, product, and research teamsSupport testing, audits, and deployment workflowsMonitor protocol performance and on-chain activity RequirementsStrong proficiency in Solidity (EVM) and/or RustExperience deploying ERC20 / BEP20 or similar token standardsFamiliarity with smart contract testing (Foundry, Hardhat)Understanding of contract security best practicesStrong system design and problem-solving skillsComfortable working in a fast-paced, remote environment Nice to HaveExperience with DeFi protocols (DEX, perps, lending)Understanding of AMM models and perpetual mechanicsExperience building trading systems or financial primitivesExperience with oracles (Chainlink, Pyth, etc.)Exposure to AI agents or automated trading systemsOpen-source contributions in Web3 / DeFi Compensation & BenefitsPerformance Bonus: Annual incentive structureBenefits: Remote-first flexibility, high ownership, impact-driven culture