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Senior Software Engineer
About MoonPay
MoonPay is for builders with something to prove.
This isn't a "work on cool crypto stuff" company. It's a high-standards, high-velocity, high-accountability company building the operating system for value movement. If the internet moves information, we move value: crypto, stablecoins, tokenized assets, and whatever comes next. Four offerings make that real: fund, tokenize, trade, and spend. 30M+ customers and 500+ ecosystem partners run on us. Licensed in the U.S. Regulated across the UK, EU, Canada, and Australia.
AI is the default operating mode here. It's woven into every role, and we expect you to use it daily. It handles the manual work so you can deliver on what actually matters.
You'll thrive here if outcomes excite you more than process, if impact motivates you more than titles, and if you want hard problems, real ownership, and teammates who love winning, building, and doing it together.
The bar is high. The pace is real. We're building for what's next, for humans and agents.
Recent recognition:
Forbes' America's Best Startup Employers 2026 . 2nd in Crypto Services on Fortune's inaugural Crypto 100,
The Sunday Times Best Places to Work two years running.
Research has shown that women are less likely than men to apply for this role if they do not have experience in 100% of these areas. Please know that this list is indicative, and that we would still love to hear from you even if you feel that you are only a 75% match. Skills can be learned, diversity cannot.
What You Will Do
Transaction Infrastructure at Scale
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Design and improve high-volume transaction broadcasting pipelines
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Manage transaction lifecycle
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Detect, retry, rebroadcast, and safely recover stuck transactions
Wallet & Lifecycle Management
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Contribute to wallet infrastructure and automation systems
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Implement safe parallel transaction handling
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Improve monitoring, observability, and operational guardrails
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Design systems with financial correctness and reconciliation and auditability in mind
Cross-Chain & DeFi Integrations
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Build infrastructure supporting cross chain and multi step flows (fiat to on-chain and vice versa)
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Handle non-atomic multi-step journeys across chains
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Design state machines and recovery strategies for partial failure scenarios
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Support routing mechanics and swap execution considerations such as price impact, liquidity changes, including MEV awareness
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Build reliable off-chain services that interact with on-chain contracts
End-to-End Engineering Ownership
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Participate in estimation, planning, and execution of projects, features, and integrations
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Develop and maintain thoroughly tested, high-quality, and performant code
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Collaborate closely with Product Managers to design scalable implementation strategies
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Contribute to reliable, maintainable systems that evolve with product needs
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Participate in incident response and post-mortems
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Improve reliability, alerting, and system resilience
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Continuously evolve infrastructure to support growing volume and complexity
About You
Must-Have
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Strong backend/platform engineering fundamentals
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Experience operating production systems with real uptime requirements
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Hands-on experience interacting with live blockchain networks in production
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Clear understanding of transaction lifecycle in at least 1 Blockchain and failure recovery
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You think in failure modes, not just happy paths
Strong Signals
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You can explain a real production incident end-to-end
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Experience with at least 1 wallet infrastructure (Eth, Bitcoin, Solana) or custody systems
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Awareness of MEV, slippages, pricing impact and swap execution risks
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Experience with high-throughput or financial systems
Bonus points
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Experience working at exchanges, custody providers, wallet infrastructure teams, or high-volume DeFi platforms
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Familiarity with UTXO-based chains (e.g., Bitcoin), including coin selection and fee bumping strategies (RBF / CPFP)
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Experience designing cross-chain or multi-step transaction orchestration systems
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Familiarity with blockchain indexing or event ingestion pipelines
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Understanding of common token standards (ERC-20, SPL) and interacting with smart contracts from backend services
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Benefits & Perks 💡
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💰 Competitive salary package
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🤝 Equity package: financial freedom starts with our employees, so all employees have ownership at MoonPay
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📈 Pay-for-performance equity bonus: those who drive outsized outcomes receive outsized rewards
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🚀 Moonshot award: we honor exceptional impact. 10 employees twice a year, each earning a $250,000 equity grant
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📊Pension: employer contributions from day one
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🎁Employee referral program: refer great people, earn 10K in USDC
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🏝 Flexible Time Off: choose when to work and when to switch off
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🎂 Birthday leave: take the day off to celebrate you
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🍼 Enhanced parental leave: more time with family, no second thought
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🌍 Hybrid working schedule: work fully remotely or from your nearest Moonbase
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🚆 Commuter benefits: public transport to and from the office
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🩺 Private healthcare benefits: to protect you and your loved ones
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🧘 Wellhub wellness membership: access to gyms, studios, classes, and wellness apps in one membership
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🤖 Unlimited enterprise access to the latest AI tools: Claude, ChatGPT, Gemini and whatever's next
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🍱 Lunch credit: meals covered on the days you're in the office
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🪑 Home office setup allowance: build the home office of your dreams
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👛 Remote working allowance: those working fully remotely get a little extra for utilities
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🌕 Monthly product budget and zero-fee crypto transactions
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📚 $1,000 Annual training budget: we support your learning journey
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🎯 High Potential Program: structured development, mentorship, and stretch opportunities
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✈️ Regular remote company offsites: high-impact in-person sessions and hackathons
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🚲 (Ireland) Cycle to Work scheme: tax-efficient bike, gear, and safety kit
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🔌 (UK) EV Salary Sacrifice: lease an electric vehicle through pre-tax salary
How do I get a job at DeFi?
Getting a job in the DeFi (decentralized finance) industry can be a competitive process, but there are a few steps you can take to increase your chances of finding a job in this field:
- Build up your skills and knowledge: To work in DeFi, you'll likely need to have a strong understanding of blockchain technology, as well as other related technologies such as smart contracts and cryptocurrency. Consider taking online courses or earning a degree in a relevant field to build up your skills and knowledge.
- Network with industry professionals: Attend meetups and conferences related to DeFi and make connections with professionals in the industry. Networking can be a valuable way to learn about job openings and get your foot in the door at a DeFi company.
- Create a strong online presence: Many DeFi companies will look at your online presence (such as your LinkedIn profile and personal website) when considering you for a job. Make sure to showcase your skills and accomplishments online and keep your profile up to date.
- Apply for relevant job openings: Keep an eye out for job openings at DeFi companies and apply for positions that align with your skills and experience. Apply for DeFi Jobs without Experience. Tailor your resume and cover letter to the specific job you're applying for and highlight any relevant experience or skills you have.
- Consider internships or volunteer work: DeFi Internships or volunteer work can be a great way to get your foot in the door and gain valuable experience in the DeFi industry. Many companies also offer internships to students, so consider applying for an internship if you're still in school.
- Be persistent: keep trying if you don't get a job right away. It can take time to find the right opportunity, but with the right skills and determination, you can land a job in the DeFi industry.