Senior Smart Contract Engineer

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🇺🇸 United States – Remote

⏰ Full Time

🟠 Senior

📜 Smart Contract Engineer

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Galaxy

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2018

₿ Crypto

💸 Finance

Crypto • Finance • Blockchain

Galaxy is a digital asset and blockchain leader helping institutions, startups, and qualified individuals shape a changing economy through innovative crypto solutions. Galaxy provides a wide array of services, including asset management, trading, lending, custodial technology, and blockchain infrastructure solutions. With a focus on both traditional finance integration and digital asset expertise, Galaxy is committed to advancing the adoption and functionality of cryptocurrencies and blockchain technologies across the globe.

📋 Description

• Own the design and implementation of new on-chain primitives across both Ethereum and Solana, including staking flows, validator orchestration, vault strategies, exit and redemption mechanisms, and integrations with institutional custody. • Drive the audit lifecycle end to end: scoping, engaging audit firms, triaging findings, implementing remediations, and shepherding code to mainnet deployment. • Set and enforce the engineering bar within your team: testing standards, review processes, deployment runbooks, incident response, and on-call rotations for live contracts. • Partner with product and engineering leadership to translate enterprise-grade requirements — custody, compliance, settlement, operational controls — into on-chain designs that hold up to scrutiny from bank-grade counterparties. • Mentor smart contract engineers on your team and contribute to hiring, code review culture, and career development across the broader smart contract function. • Represent Galaxy's on-chain work externally where appropriate: with auditors, institutional clients, governance forums, and the broader Ethereum and Solana ecosystems. • Embrace and champion the thoughtful adoption of AI to improve team performance and business outcomes. • Leverage AI tools (e.g., generative AI, automation platforms, data copilots) to improve productivity, decision-making, and output quality in your day-to-day work.

🎯 Requirements

• 7+ years of professional software engineering experience, with at least 4 years writing production smart contracts deployed at meaningful TVL across both Ethereum (Solidity) and Solana (Rust/Anchor). • Deep expertise in EVM internals, gas optimization, and proxy/upgradeability patterns (UUPS, Transparent, Beacon), plus a working command of Solana program development, account models, and PDA design. • A track record of shipping contracts that have cleared rigorous third-party audits (Trail of Bits, OpenZeppelin, Certora, Spearbit, Neodyme, OtterSec, or equivalent) and a working familiarity with formal verification tooling such as Certora Prover, Halmos, or Kontrol. • Fluency in the modern toolchains on both chains: Foundry, Hardhat, Slither, Echidna on the EVM side; Anchor, Solana program test frameworks, and fuzzing tools on the Solana side. • Strong testing discipline that includes invariant and fuzz testing as a default, not an afterthought. • Hands-on experience across multiple on-chain domains relevant to institutional infrastructure: liquid staking, validator economics and slashing mechanics, tokenized vault/ERC-4626 architectures, custody integrations, or settlement and redemption flows. • A security-first mindset and the judgment to know when to slow down, when to ship, and when to design for failure modes (pause mechanisms, circuit breakers, containment modes). • Demonstrated depth: you've owned complex architecture decisions end-to-end, held a high bar for code review and testing, and supported other engineers through audits, incidents, and production deployments — with or without a formal lead title. • Strong written communication; you can explain a subtle reentrancy, oracle staleness, or account validation risk clearly to engineers, auditors, product, and enterprise counterparties alike. • AI fluency. You’ve integrated AI into how you work, not as a novelty but as a significant multiplier. You can speak concretely about which tools you use, what you’ve built or accelerated with them, and where they fall short — including the specific risks of using AI-generated code in a smart contract context. • High agency. You see what needs to happen and make it happen. You’re comfortable operating with incomplete direction, taking ownership of ambiguous problems, and being accountable for outcomes — including the ones that don’t pan out. Tell us about an idea you championed and ran with.

🏖️ Benefits

• Competitive base salary and discretionary bonus • Hybrid/Flexible Working Arrangements • Flexible Time Off (paid) • 3% 401(k) company contribution • Company-paid health and protective benefits for employees, partners, and other dependents • Generous paid Parental Leave • Competitive family planning benefits for US employees • Opportunities to learn about the Crypto industry • Smart, entrepreneurial, and fun colleagues • Free daily snacks and weekly breakfasts/lunches • Employee Resource Groups • Free coaching and counseling sessions through Headspace