Senior React Native Engineer - Remote, High-Impact

Underdog; United States; On-site; USD 150,000 - 220,000; Full time

Benefits offered by this job

Unlimited PTO

16 weeks parental leave

Home office stipend

In-person offsites & trainings

401k match

Health, dental, vision plans

Job summary

Underdog, a remote-first sports-tech company, is hiring a senior software engineer with deep React Native experience. You will scale core parts of our mobile and web apps, own critical bug fixes, and lead cross-team design reviews to balance performance, reliability, and speed.

You will collaborate with backend, product, and design to ship fast while mentoring peers and creating reusable patterns across teams. The role emphasizes ownership, clear milestones, and data-driven decision making.

Qualifications

• 7+ years of professional software engineering experience with React Native and native iOS/Android layers beneath it.
• Track record solving cross-cutting or ambiguous problems spanning services and teams.
• Experience leading technical initiatives (performance work, reliability improvements, developer velocity).
• Ability to turn high-level goals into executable plans with milestones and owners.

Responsibilities

• Build and scale core parts of the mobile and web apps in React Native from entry to tracking. Own the lifecycle.
• Investigate and resolve critical issues in the React Native client and implement guardrails to prevent recurrence.
• Lead design reviews for cross-platform initiatives, calling out trade-offs, risks, and failure modes.
• Partner with backend, product, and design on entry placement, confirmation, slip changes, errors, and bet history to keep speed and consistency.
• Turn ambiguous goals into concrete plans with milestones and clear owners across teams.
• Use product analytics, error dashboards, and session data to validate fixes and catch regressions early.
• Coach other engineers on design reasoning and ownership; create reusable patterns adopted by other teams.
• Anticipate and mitigate risks in shared systems before they impact customers.

Skills

React Native

iOS/Android

Cross-team leadership

Plan milestones

Data-driven

Mentoring

Communication

Performance focus

Tools

Amplitude

Datadog

Job description

Underdog, a remote-first sports-tech company, is hiring a senior software engineer with deep React Native experience. You will scale core parts of our mobile and web apps, own critical bug fixes, and lead cross-team design reviews to balance performance, reliability, and speed.

You will collaborate with backend, product, and design to ship fast while mentoring peers and creating reusable patterns across teams. The role emphasizes ownership, clear milestones, and data-driven decision making.