[Remote] Backend Engineer, Solving
Note: The job is a remote job and is open to candidates in USA. Relay is a cross-chain payments protocol providing fast, low-cost bridging, swaps, and transactions across numerous blockchain networks. The Solving Engineer will build and own backend and on-chain software for quote generation, trade routing, request fulfillment, chain integrations, and trust-minimized settlement while improving reliability and profitability.
Responsibilities
- Extend Relay’s support to new chain VMs by writing and auditing on-chain contracts
- Own the chain integration layer, including settlement contracts, multisig infrastructure, and the on-chain allocator
- Design and implement trust-minimized settlement flows, moving the protocol toward fully verifiable, decentralized settlement
- Collaborate with the Solving team to ensure protocol primitives support efficient quote generation, just-in-time liquidity, and optimal routing
- Investigate and resolve protocol-level incidents, including RPC failures, oracle timeouts, and settlement job errors
- Contribute to open-source protocol specifications and developer documentation
Skills
- You have the ability to own complex, multi-stage pipelines (deposit detection → quote generation → fill execution → settlement)
- You have strong instincts around reliability: you write error-handling, add observability, and think through edge cases like swap failures, liquidity crises, and gas spikes
- You're comfortable with a high degree of ownership and autonomy; you drive work from idea to production
- Experience building systems that interact with on-chain protocols: querying DEX quotes, constructing swap calldata, handling transaction reverts and retries
- Strong TypeScript / Node.js backend engineering skills, most of the solver codebase is TypeScript-first
- Understanding of DeFi primitives: AMMs, liquidity pools, token routing, slippage, price impact, and MEV
- Experience with cross-chain bridging protocols or intent-based architectures
- Prior work on solver or market-making systems in a DeFi context
- Familiarity with Solana and Jupiter routing, or Bitcoin UTXO-based transactions
- Experience integrating with BullMQ, Redis-backed job queues, or similar async job infrastructure
- Track record shipping integrations with major DEX aggregators (1inch, LiFi, 0x, etc.)
Benefits
- Equity package
- Comprehensive health benefits
- Unlimited PTO policy with encouraged minimum
- Remote-first culture with emphasis on collaboration, communication, and flexibility
Company Overview
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