Senior Smart Contract Engineer

🔥 6 minutes ago

🇺🇸 United States – Remote

💵 $170k - $190k / year

⏰ Full Time

🟠 Senior

📜 Smart Contract Engineer

🦅 H1B Visa Sponsor

This company has sponsored H1B visas in the past.

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CoinList

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2017

💼 Consulting

📣 Marketing

₿ Crypto

💰 $1G Series A on 2021-10

Consulting • Marketing • Crypto

CoinList is a platform that specializes in facilitating the trading and launch of cryptocurrencies and tokens. It offers services such as Pro Trading, where users can trade new cryptocurrency assets, and Token Launches that provide access to new tokens before they list on other exchanges. CoinList also offers OTC Trading for large crypto transactions, incentivized testnets for beta testing new products with rewards, and opportunities to earn through token accelerators and rewards campaigns. CoinList is operated by Amalgamated Token Services Inc. , and aims to help users participate in the evolving crypto asset space while highlighting potential risks associated with crypto trading.

📋 Description

• Build smart contracts integrating with asset providers such as Ondo and Centrifuge. • Develop proxy smart contracts connecting users with underlying assets through a common interface. • Ship Solidity contracts to mainnet on EVM chains. • Design contract systems from the ground up, including boundaries, interfaces, storage layout, upgrade strategy, access control, and emergency paths. • Help determine which functionality belongs onchain. • Own meaningful work, including contracts behind critical token sales or onchain work for new products. • Conduct adversarial reviews of colleagues’ contracts and external audit findings. • Perform fuzzing and invariant testing. • Rehearse deployments on testnets. • Monitor systems and participate in incident response. • Report directly to the CTO and contribute in a small, greenfield-focused engineering team. • Opportunity to extend work into Rust and the Solana runtime.

🎯 Requirements

• Over 7 years of professional working experience, including at least 2 years of writing Solidity that reached production. • Knowledge of the EVM, including storage layout and packing, gas mechanics, memory versus calldata versus storage, ABI encoding, events and indexing, contract size limits, and related tradeoffs. • Knowledge of modern Solidity patterns, including proxies and upgradeability, role-based access control, signature verification and replay protection (EIP-712), reentrancy defenses, and oracle or price-manipulation defenses. • Experience with Foundry (preferred) or Hardhat, fork tests, fuzzing and invariants, and a defensible testing workflow. • Security mindset covering flash loans, MEV bots, malicious tokens, adversarial review, and documenting findings. • Ability to ship high-quality code, set and meet deadlines, prioritize effectively, and deliver reliably. • AI fluency and natural integration of AI tools into daily workflow. • Product-minded approach. • Ability to work independently and collaboratively. • Comfort with ambiguity. • Strong written communication for a distributed, remote-first team. • Preferred: Rust and Anchor, or Solana programs in production, including SPL tokens, program-derived addresses, token extensions, and compute-unit optimization. • Preferred: DeFi protocol depth, including lending, AMMs, vaults (ERC-4626), staking, and reward accounting. • Preferred: Account abstraction (ERC-4337), including smart accounts, paymasters, and bundlers.

🏖️ Benefits

• Fully remote, U.S. based • Base Salary: $170,000 – $190,000 (based on experience and jurisdiction) • Equity: CoinList is a high-growth startup, and equity is a significant part of your total compensation. • Medical, dental, and vision at no monthly cost (US only) • Unlimited PTO • Monthly AI tool budget