Senior Software Engineer – React Native

Underdog Fantasy

Senior Software Engineer specializing in React Native to enhance the betting experience at Underdog. Collaborating across platforms and addressing complex technical challenges in sports technology.

Posted 7/31/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $150,000 - $220,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive experience in React Native development, with a strong understanding of native iOS and Android layers. Capable of leading technical initiatives, collaborating across teams, and effectively communicating complex technical concepts.

Highest-signal resume keywords

React Native DevelopmentCross-Team CollaborationTechnical Initiative LeadershipMobile App PerformanceCoaching and Mentoring

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software EngineeringIOS DevelopmentAndroid DevelopmentPerformance OptimizationTestabilityError ResolutionProduct AnalyticsDesign ReviewRisk MitigationReusable Patterns

Soft Skills

Strong CommunicationCollaborative MindsetCoaching Ability

Industry Keywords

Mobile App DevelopmentCross-Cutting ProblemsTechnical Trade-OffsDeveloper VelocityError Dashboards

Tech Stack

Tools & technologies

AndroidiOSReactReact Native

About the role

Key responsibilities & impact

Build and scale core parts of the mobile and web apps in React Native; entry building, review, placement, and tracking. The whole lifecycle.
Investigate and resolve critical issues in the React Native client, and put guardrails in place so they don't recur.
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.
Partner with backend, product, and design on entry placement, entry confirmation, slip changes and errors, and bet history to keep the experience fast and consistent
Turn ambiguous, cross-team goals into concrete plans with milestones and clear owners
Use data like product analytics, error dashboards, and session data to validate that fixes actually land and to catch regressions early
Coach other engineers on design reasoning and ownership, and create reusable patterns that other teams adopt
Anticipate and mitigate risks in shared systems before they impact other teams or customers

Requirements

What you’ll need

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; not just staying in your lane
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
A collaborative, coaching mindset; you make other engineers better through review and design discussion, not just your own output
Strong written and verbal communication; you can make a technical trade-off legible to product, design, and other engineering teams
Experience with mobile app performance, testability, and shipping reliable features at scale

Benefits

Comp & perks

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
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