What You'll Be Doing

Design and improve high-volume transaction broadcasting pipelines
Manage transaction lifecycle, including detecting, retrying, rebroadcasting, and safely recovering stuck transactions
Contribute to wallet infrastructure and automation systems with safe parallel transaction handling
Improve monitoring, observability, and operational guardrails
Design systems with financial correctness, reconciliation, and auditability
Build infrastructure supporting cross-chain and multi-step flows (fiat to on-chain and vice versa)
Handle non-atomic multi-step journeys across chains with state machines and recovery strategies for partial failure scenarios
Support routing mechanics and swap execution considerations such as price impact, liquidity changes, including MEV awareness
Build reliable off-chain services interacting 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 with Product Managers to design scalable implementation strategies
Contribute to reliable, maintainable systems evolving with product needs
Participate in incident response and post-mortems
Improve system reliability, alerting, and 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 one blockchain and failure recovery
Ability to think in failure modes, not just happy paths

Ability to explain a real production incident end-to-end
Experience with at least one wallet infrastructure (Ethereum, 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