MoonPay is looking for a Blockchain Engineer to build, scale, and maintain critical blockchain applications and integrations for both consumer and B2B initiatives. You will join a small, collaborative team focusing on transaction infrastructure, wallet management, and cross-chain DeFi integrations.

What You'll Do

Design and improve high-volume transaction broadcasting pipelines.
Manage the entire transaction lifecycle, including detection, retry, rebroadcast, and recovery of stuck transactions.
Contribute to wallet infrastructure and automation systems.
Implement safe parallel transaction handling.
Improve monitoring, observability, and operational guardrails.
Design systems with financial correctness, reconciliation, and auditability in mind.
Build infrastructure supporting cross-chain and multi-step flows (fiat to on-chain and vice versa).
Handle non-atomic multi-step journeys across chains.
Design state machines and recovery strategies for partial failure scenarios.
Support routing mechanics and swap execution considerations, such as price impact, liquidity changes, and MEV awareness.
Build reliable off-chain services that interact with on-chain contracts.
Participate in estimation, planning, and execution of projects, features, and integrations.
Develop and maintain thoroughly tested, high-quality, and performant code.
Collaborate closely with Product Managers to design scalable implementation strategies.
Contribute to reliable, maintainable systems that evolve with product needs.
Participate in incident response and post-mortems.
Improve reliability, alerting, and system resilience.
Continuously evolve infrastructure to support growing volume and complexity.

What We're Looking For

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 one blockchain and failure recovery.
You think in failure modes, not just happy paths.

Nice to Have

You can explain a real production incident end-to-end.
Experience with at least one 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.
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.

Team & Environment

You will work within small, collaborative cross-functional teams of 4-6 engineers. You'll collaborate closely with a dedicated Product Manager and Product Data Analyst.

Benefits & Compensation

Competitive salary package.
Equity package: all employees have ownership at MoonPay.
Pay for performance equity bonus.
Moonshot award: 10 employees twice a year, each earning a $250,000 equity grant.
Unlimited holidays.
Hybrid working schedule: work fully remotely or from your nearest Moonbase.
Private Healthcare benefits.
Enhanced parental leave.
Annual training budget.
Home office setup allowance.
Remote working allowance for fully remote employees.
Monthly budget to spend on our products and zero fee crypto transactions.
Employee referral programme: refer them to receive 10K in USDC.
Regular remote company offsites.