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Underdog FantasyUnderdog FantasyUnited States

Senior Software Engineer, Exchange

Senior engineer building and scaling high-performance exchange infrastructure for prediction markets, including order matching, APIs (FIX/REST/WebSockets), and clearing systems. Requires 5+ years experience in low-latency systems and strong proficiency in performant languages.

160k – 240k/yr
Remote5+ YOEBackend Engineering

About the role

What you'll do

  • Build and scale core exchange infrastructure - order matching, trade execution algorithms, and the data structures that underpin them
  • Build APIs and data feeds that clients depend on - REST, FIX, WebSockets - and make them fast and reliable
  • Design robust clearing infrastructure, position management, margining, and how money actually moves
  • Drive technical relationships with our customers (market makers, traders, etc.)
  • Hunt down performance bottlenecks - in databases, internal services, and anywhere latency is costing us
  • Put systems under pressure before production does - rigorous testing of the things that can't go down
  • Help invent what prediction market structure looks like beyond what exists today - new contract types, new mechanics, etc.
  • Move fast, make calls, and own the outcome - we give real autonomy, which means real accountability.

What you bring

  • At least 5+ years of engineering experience, with a track record on high-performance, low-latency systems
  • Strong command of highly performant programming languages (C, Rust, C++, Go, Java, or similar) and the willingness and desire to flex into others
  • You are product minded and scope well, you make good tradeoffs, and don't need hand-holding
  • Demonstrable experience thriving in fast-paced and ambiguous environments, where high-agency and ambition go hand-in-hand
  • Experience in TradeFi, prediction markets, crypto exchange infrastructure or SOR

Bonus points if you have…

  • Background in sports, fantasy, or gaming
  • Proven experience building highly available, high-volume consumer-facing systems
  • Deep understanding of concurrency, threading models, and the tradeoffs in performance-sensitive systems

What we can offer you

  • Unlimited PTO for full-time employees (we're extremely flexible with the exception of the first few weeks before & into the NFL season)
  • 16 weeks of fully paid parental leave
  • Home office stipend
  • A connected virtual-first culture with a highly engaged distributed workforce
  • 5% 401k match, FSA, company paid health, dental, vision plan options for employees and dependents

Skills

CRustC++GoJavaFixRestWebSocketsOrder MatchingTrade ExecutionLow-Latency SystemsConcurrencyPerformance Optimization
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