Senior Software Engineer

High Roller

. Design, develop and maintain features across the ROLR prediction markets platform .

Posted 10/26/2026full-timeRemote • New York • United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and shipping production-ready mobile and web applications using React Native, Svelte, and TypeScript. Strong problem-solving abilities and experience in collaborating with cross-functional teams to deliver high-quality software solutions.

Highest-signal resume keywords

React Native Application DevelopmentSvelteKit Web Application DevelopmentTypeScript ProficiencyREST API IntegrationAutomated Testing Experience

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Applicant Tracking System Keywords

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Hard Skills

Software DevelopmentMobile Application DevelopmentWeb Application DevelopmentBackend-for-Frontend API DevelopmentAutomated TestingDatabase QueryingReal-Time Data HandlingTechnical DesignProduction SupportPerformance Optimization

Soft Skills

Problem-SolvingCollaborationMentoringAdaptabilityCommunication

Tools & Technologies

ExpoTailwind CSSTanStack QueryZustandJestReact Native Testing LibraryVitestPlaywrightSentryOpenTelemetry

Industry Keywords

FintechTradingFinancial ServicesGamingTransaction-Based Digital Product

Tech Stack

Tools & technologies

AndroidiOSJavaScriptJestKafkaNext.jsReactReact NativeRedisSvelteTypeScriptVue.js

About the role

Key responsibilities & impact

Design, develop and maintain features across the ROLR prediction markets platform
Build features for the React Native iOS and Android app and SvelteKit web app
Turn product requirements and designs into reliable, production-ready software
Contribute to onboarding, account management, market discovery, trading and account activity journeys
Build and maintain backend-for-frontend API routes and third-party integrations
Work closely with Product, Design, QA and other engineers
Collaborate on technical solutions and implementation decisions
Write clean, maintainable and well-tested code
Participate in code reviews and contribute to engineering standards and best practices
Mentor less experienced engineers and lead technical design discussions
Identify and resolve technical issues during development and in production
Support testing, releases and troubleshooting
Consider performance, reliability, security and scalability
Contribute to the continued development of ROLR's technology platform

Requirements

What you’ll need

5+ years of professional software development experience, including at least 2 years shipping production mobile or web front ends in TypeScript
Strong software engineering fundamentals and experience building production applications
Track record of owning features end to end, from technical design through release and production support
Experience building and shipping iOS and Android apps with React Native and Expo, including Expo Router, EAS builds, over-the-air updates and App Store / Play Store releases
Experience building web applications with Svelte and SvelteKit, including server-side rendering and backend-for-frontend API routes
Strong experience in a comparable framework such as React, Next.js or Vue, with a willingness to work in Svelte, will also be considered
Strong TypeScript skills, with experience in client state and data-fetching patterns such as TanStack Query and Zustand, and utility-first styling with Tailwind CSS and NativeWind
Experience working with REST APIs, real-time data over WebSockets or server-sent events, and third-party SDKs such as identity (OIDC), KYC and payment providers
Experience with automated testing such as Jest, React Native Testing Library, Vitest or Playwright, as well as CI/CD pipelines and code review
Ability to work effectively with Product, Design, QA and other engineers
Strong problem-solving skills and ability to work independently when required
Comfortable working in a fast-moving environment where products and priorities continue to evolve
Comfortable with backend fundamentals, including querying databases and understanding how services interact beyond the BFF layer
At least a basic understanding of Kafka and Redis; hands-on experience preferred
Preferred: experience in fintech, trading, financial services, gaming or another transaction-based digital product
Preferred: experience with real-time data or financial transactions
Familiarity with Sentry, OpenTelemetry or similar observability tooling
Familiarity with charting libraries such as lightweight-charts

Benefits

Comp & perks

Competitive health and welfare benefits
401(k) retirement plan with company match
Flexible vacation policy
Home office setup reimbursement
Team events and get-togethers
Access to mental health support