Underdogfantasy

Underdogfantasy

Senior Software Engineer - React Native

United States/Remote · Senior

Sponsorship not specifiedDetected 9 hours ago
RubyReactReact NativeiOSAndroidFull-Stack DevelopmentDatadogLLMsCommunicationMentoring

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odds of building a lasting career here

16Unrated
Cap-exempt (no lottery)0
Sponsors this role0
Entry-level history0
PERM / green-card track0
Lottery odds40
Fits your clock70

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About the role

  • Our work spans full stack in Ruby, iOS, Android, and Web products, and you'll bring deep React Native expertise to that mix, to make sure the experience holds up to a high bar for speed and reliability at scale.
  • You'll dig into the trickiest bugs and edge cases in the betting experience, help raise the bar for what "done" looks like across the client, and coach other engineers along the way so the patterns you introduce actually stick.
  • Investigate and resolve critical issues in the React Native client, and put guardrails in place so they don't recur.

Responsibilities

  • build the best products and we'll build the biggest company in the space, because there's so much more to be built for sports fans.
  • The people who win here are the ones who care, push, and perform.
  • Build and scale core parts of the mobile and web apps in React Native
  • Lead design reviews for initiatives that cut across iOS, Android React Native clients, calling out trade-offs, risks, and failure modes before they become incidents.

Requirements

  • 7+ years of professional software engineering experience, with meaningful time spent in React Native and a solid grasp of the native iOS/Android layers underneath it
  • A track record of solving cross-cutting or ambiguous problems that span multiple services, teams, or platforms
  • Experience leading technical initiatives (performance work, reliability improvements, developer velocity) with measurable before/after impact
  • Comfort turning unclear, high-level goals into an executable plan with milestones and owners that other teams actually align on
  • Experience with mobile app performance, testability, and shipping reliable features at scale
  • Even better if you have
  • Experience working on wagering, betting, or other high-stakes transactional flows
  • Familiarity with Amplitude, Datadog, or similar tools for instrumenting and monitoring client-side behavior

Compensation

  • Our target starting base salary range for this position is between $150,000 and $220,000, plus target equity.

Benefits

  • Unlimited PTO (we're extremely flexible with the exception of the first few weeks before & into the NFL season)
  • 16 weeks of fully paid parental leave

Company info

  • Anticipate and mitigate risks in shared systems before they impact other teams or customers
  • At Underdog, we make sports more fun.
  • We're looking for a Senior Software Engineer who specializes in React Native to help us build the core betting experience, from the moment a customer builds a slip through submission, confirmation, and settlement.
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This listing is sourced directly from Underdogfantasy's careers page and normalized into a canonical job model.