Senior Backend Engineer

Paxos Labs

. Research, design, and build core services for Transit’s RFQ orchestration engine, including pricing, quoting, routing, inventory management, and settlement across chains and venues .

Posted 9/25/2026full-timeNew York City • New York • United StatesSeniorWebsite

Tech Stack

Tools & technologies

Solidity

About the role

Key responsibilities & impact

Research, design, and build core services for Transit’s RFQ orchestration engine, including pricing, quoting, routing, inventory management, and settlement across chains and venues
Research, design, and build core services for Transit’s exchange orderbook, including the matching engine, pricing rules, order APIs, and onchain settlement
Own systems end to end, from design through deployment, monitoring, and on-call operations involving real money
Build rate-aware pricing and inventory controls for moving-price assets
Integrate new chains, venues, solver networks, and liquidity sources
Build the execution attribution and economics layer for programmatic integrator revenue sharing
Work directly with smart contracts, mint and redeem facilities, and compliance enforcement
Set technical direction on a small team and raise the engineering bar through review and mentorship

Requirements

What you’ll need

6+ years building and operating production backend systems, with true ownership of something that had to stay up
Track record of building systems 0 to 1 and then hardening them, rather than only maintaining mature ones
Experience with systems where correctness is financial: exchange infrastructure, trading, settlement, or similar
Understanding of traditional exchange market structure such as CLOBs, batch auctions, RFQs, or similar, across economic, incentive, and technical design
Experience at a market maker, exchange, or trading firm (nice to have)
Multi-chain infrastructure experience, especially inventory or treasury management across chains (nice to have)
Prior work on tokenized assets, stablecoins, or RWAs (nice to have)
Understanding of onchain market structure: AMMs, solver networks, DEX aggregators, bridges, etc. (nice to have)
Reading Solidity and reasoning about contract interactions, even if you don't write smart contracts (nice to have)
Judgment about latency, inventory risk, and execution quality, and the ability to explain a pricing decision to someone on the commercial side (nice to have)

Benefits

Comp & perks

Competitive compensation
Meaningful equity participation