Company Overview
MoonPay is a unified payments platform for digital currency, making it easy for anyone, anywhere, to buy, sell, swap and pay in digital currencies as easily as sending an email. Trusted by over 30 million customers and over 500 ecosystem partners, MoonPay is driving mainstream crypto adoption worldwide. Fully licensed in the U.S. and regulated across the UK, EU, Canada, and Australia, MoonPay is building the future of payments and the decentralized economy.
Job Title
Blockchain Engineer
Remote Location
Remote - United Kingdom, Spain, Portugal, South Africa
Job Overview
MoonPay is seeking a Blockchain Engineer to join our Engineering team and contribute to our expanding consumer and B2B initiatives. Our focus areas include self-custody wallets, DeFi Trading, on-chain asset delivery, and innovating on what the future of Web3 means. You'll work in small, collaborative cross-functional teams of 4-6 engineers, working closely with a dedicated Product Manager and Product Data Analyst.
Job Responsibilities
- Transaction Infrastructure at Scale: Design and improve high-volume transaction broadcasting pipelines, manage transaction lifecycle, detect, retry, rebroadcast, and safely recover stuck transactions
- Wallet & Lifecycle Management: Contribute to wallet infrastructure and automation systems, implement safe parallel transaction handling, improve monitoring, observability, and operational guardrails
- Cross-Chain & DeFi Integrations: Build infrastructure supporting cross-chain and multi-step flows (fiat to on-chain and vice versa), handle non-atomic multi-step journeys across chains
- State Machine Design: Design state machines and recovery strategies for partial failure scenarios, support routing mechanics and swap execution considerations including price impact, liquidity changes, and MEV awareness
- Off-Chain Services: Build reliable off-chain services that interact with on-chain contracts
- End-to-End Engineering Ownership: Participate in estimation, planning, and execution of projects, features, and integrations
- Code Quality: Develop and maintain thoroughly tested, high-quality, and performant code
- Collaboration: Collaborate closely with Product Managers to design scalable implementation strategies
- Incident Response: Participate in incident response and post-mortems
- System Improvement: Improve reliability, alerting, and system resilience, continuously evolve infrastructure to support growing volume and complexity
Requirements
- Strong backend/platform engineering fundamentals
- Experience operating production systems with real uptime requirements
- Hands-on experience interacting with live blockchain networks in production
- Clear understanding of transaction lifecycle in at least 1 Blockchain and failure recovery
- Ability to think in failure modes, not just happy paths
- Strong ability to explain a real production incident end-to-end
- Experience with at least 1 wallet infrastructure (Eth, Bitcoin, Solana) or custody systems
- Awareness of MEV, slippages, pricing impact and swap execution risks
- Experience with high-throughput or financial systems
Preferred Qualifications (Bonus Points)
- Experience working at exchanges, custody providers, wallet infrastructure teams, or high-volume DeFi platforms
- Familiarity with UTXO-based chains (e.g., Bitcoin), including coin selection and fee bumping strategies (RBF / CPFP)
- Experience designing cross-chain or multi-step transaction orchestration systems
- Familiarity with blockchain indexing or event ingestion pipelines
- Understanding of common token standards (ERC-20, SPL) and interacting with smart contracts from backend services
Benefits & Perks
- Competitive salary package
- Equity package: All employees have ownership at MoonPay
- Pay for performance equity bonus: Those who drive outsized outcomes receive outsized rewards
- Moonshot award: 10 employees twice a year, each earning a $250,000 equity grant
- Unlimited holidays: Autonomy to choose when to work and when to switch off
- Hybrid working schedule: Work fully remotely or your nearest Moonbase
- Private Healthcare benefits: To protect you and your loved ones
- Enhanced parental leave: Spend more time with your loved ones
- Annual training budget: Support for your training journey
- Home office setup allowance: Create the home office of your dreams
- Remote working allowance: Extra for utilities when working fully remotely
- Monthly budget for products: Zero fee crypto transactions
- Employee referral programme: Receive $10,000 in USDC for referring great people
- Regular remote company offsites: Meet colleagues for high impact in-person sessions and hackathons
How to Apply
Click the "Apply for this job" button to submit your application. MoonPay is committed to diversity and inclusion in the workplace and is a proud equal opportunity employer. We prohibit discrimination and harassment of any kind based on race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status, or any other characteristic protected by law.
Research has shown that women are less likely than men to apply for this role if they do not have experience in 100% of the areas listed. Please know that this list is indicative, and we would still love to hear from you even if you feel that you are only a 75% match. Skills can be learnt, diversity cannot.