Backend Engineer, Solving

Relay (Uneven Labs, Inc.) • ,

10d • Remote

About The Position

The Solving team is the engine behind Relay’s ability to execute requests with the best price and highest reliability. As a Solving Engineer, you will build and own the software that generates quotes, routes trades across on-chain and off-chain venues, and fills user requests end-to-end. This is a high-impact, high-ownership role: your work directly affects fill success rates, latency, and the profitability of Relay’s solver business.

Requirements

• Ability to own complex, multi-stage pipelines (deposit detection → quote generation → fill execution → settlement)
• Strong instincts around reliability: you write error-handling, add observability, and think through edge cases like swap failures, liquidity crises, and gas spikes
• 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

Nice To Haves

• 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.)

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

Benefits

• Competitive base salary
• Equity package
• Comprehensive health benefits
• Unlimited PTO policy with encouraged minimum
• Remote-first culture with emphasis on collaboration, communication, and flexibility

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed