Senior Software Engineer, Fintech Platform (RN & SvelteKit)

High Roller Technologies; United States; On-site; USD 140,000 - 200,000; Full time

Benefits offered by this job

Health benefits

401(k) retirement plan with company‑m/

Flexible vacation policy

Home office setup reimbursement

Team events

Mental health support

Job summary

High Roller Technologies is building a US-focused prediction markets platform. We are seeking a Senior Software Engineer to own features end to end across iOS/Android (React Native) and web (SvelteKit).

You will collaborate with Product, Design, QA and other engineers to craft scalable, reliable software and contribute to the platform architecture. You’ll work on BFF APIs, real-time data flows, and third‑party integrations, while maintaining high quality, performance, and security standards in a

Qualifications

• 5+ years of professional software development experience.
• Proven track record shipping production mobile or web front ends in TypeScript.
• Experience owning features end to end from design to release and production support.
• Experience building iOS/Android apps with React Native and Expo; including OTA updates and app store releases.
• Experience with Svelte/SvelteKit or similar frameworks (React/Next.js/Vue) and server-side rendering.

Responsibilities

• Design, develop and maintain features across iOS, Android, and web apps (React Native and SvelteKit).
• Turn product requirements into reliable, production-ready software.
• Contribute to customer journeys including onboarding, account management, market discovery, trading and activity.
• Build backend-for-frontend routes and third-party integrations.

Skills

TypeScript

React Native

SvelteKit

Web frontend

Backend basics

Tools

REST APIs

CI/CD

Jest

Job description

High Roller Technologies is building a US-focused prediction markets platform. We are seeking a Senior Software Engineer to own features end to end across iOS/Android (React Native) and web (SvelteKit).

You will collaborate with Product, Design, QA and other engineers to craft scalable, reliable software and contribute to the platform architecture. You’ll work on BFF APIs, real-time data flows, and third‑party integrations, while maintaining high quality, performance, and security standards in a