Senior Software Engineer, React Native

Underdog Fantasy; United States; Remoto; USD 150.000 - 220.000; Tempo pieno

Vantaggi offerti da questo lavoro

Unlimited PTO

Parental leave (16 weeks)

Home office stipend

Virtual-first culture with occasional;

Slack reactions

401k with employer match

Health/dental/vision benefits

Tech stipend: Claude and ChatGPT

Descrizione del lavoro

Underdog is seeking a Senior Software Engineer specializing in React Native to lead building the core betting experience, from slip creation to settlement. You will work across Ruby, iOS, Android, and Web, bringing deep RN expertise to ensure speed, reliability, and scale.

You will own cross-cutting problems, drive design decisions, and mentor engineers to raise the bar for what 'done' means across clients. You will tackle tough bugs and ensure seamless feature delivery across platforms.

Competenze

• 7+ years of professional software engineering experience with React Native and strong knowledge of native iOS/Android layers underneath it.
• Proven track record solving cross-cutting or ambiguous problems across services, teams, or platforms.
• Experience leading technical initiatives to improve performance, reliability, and developer velocity.

Mansioni

• Build and scale core parts of mobile and web apps in React Native across entry, review, placement, and tracking.
• Investigate and resolve critical issues in the React Native client and implement guardrails to prevent recurrence.
• Lead design reviews for cross-platform initiatives, evaluating trade-offs and risks before incidents occur.
• Collaborate with backend, product, and design on entry placement, confirmation, and bet history to ensure speed and consistency.
• Turn ambiguous goals into concrete plans with milestones and owners.
• Use product analytics and error data to validate fixes and catch regressions early.
• Coach other engineers on design reasoning and create reusable patterns.

Conoscenze

Leadership

Cross-functional collaboration

Communication

Mobile performance

Strumenti

React Native

iOS

Android

Descrizione del lavoro

At Underdog, we make sports more fun.

Our thesis is simple: build the best product for sports fans and we will win the space. Founded in 2020, we're one of the fastest-growing sports companies ever, and there’s still so much left to do. We've built and scaled products across fantasy sports, sports betting, and prediction markets, all united in one app that’s seamless, intuitive, and actually fun to use.

Underdog isn’t for everyone. One of our core values is give a sh*t. The people who win here are the ones who care, push, and perform. We’re remote-first by design, but highly collaborative with regular in-person gatherings that help teams build, iterate, and move fast together.

Got that dog in you? Join us.

After all, winning as an Underdog is more fun.

What you'll do:

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. 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.

This means owning cross-cutting problems that touch multiple platforms, driving design decisions that hold up under real production traffic, and closing the gap between how a feature is supposed to work and how it actually behaves once it ships. 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.

• 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

Who you are:

• 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 impactComfort turning unclear, high-level goals into an executable plan with milestones and owners that other teams actually align onA collaborative, coaching mindset; you make other engineers better through review and design discussion, not just your own outputStrong written and verbal communication; you can make a technical trade-off legible to product, design, and other engineering teamsExperience with mobile app performance, testability, and shipping reliable features at scale

  Bonus points if you have:

  • Background in sports, fantasy, or gaming
  • 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

  Our target starting base salary range for this position is between $150,000 and $220,000, plus target equity. Final compensation will be determined based on a variety of factors including relevant experience, skills and expertise, interview performance, and other market considerations.

  What we can offer you:
  • Unlimited PTO for full-time employees (we're extremely flexible with the exception of the first few weeks before and into the NFL season)
  • 16 weeks of fully paid parental leave
  • Home office stipend
  • A virtual-first culture, but we come together a few times per year in person for offsites, trainings, hackathons, and more
  • Slack reactions for every occasion
  • 401k with up to 5% employer match
  • Company paid health, dental, vision plan options for employees and dependents, FSA, and more
  • Opportunity to celebrate your favorite sports teams through local meetups and company-sponsored events
  • Claude and ChatGPT enterprise accounts

  #LI-REMOTE

  Underdog is an equal opportunity employer and doesn't discriminate on the basis of creed, race, sexual orientation, gender, age, disability status, or any other defining characteristic.

  California Applicants: Review our CPRA Privacy Notice here.