Pentasia is partnered with an exciting early-stage product company that is redefining fan engagement within the sports and gaming space. Our client is building a next-generation sports and casino sweepstakes platform and is looking for a Senior Mobile Developer to play a key role in shaping the future of its mobile experience. This is a high-impact opportunity to join a fast-moving team where you'll have genuine ownership, influence product direction, and help scale a platform with ambitious growth plans.

The Opportunity
Mobile sits at the heart of our client's roadmap. As they evolve from a WebView-heavy architecture toward a fully native React Native experience, they are seeking an experienced mobile engineer who can help drive that transformation. You'll be responsible for delivering intuitive, high-performance mobile experiences across iOS and Android, while working closely with Product, Design, Backend, and Frontend teams to improve user activation, engagement, and retention.

This role would suit someone who thrives in a startup environment, enjoys solving complex mobile challenges, and wants the opportunity to have a direct impact on both product and technical strategy.

Key Responsibilities

Lead the evolution from a WebView-centric architecture to fully native, high-performance React Native applications

Design, build, and maintain premium mobile experiences across sports and gaming products

Work closely with backend teams to develop scalable and reliable API integrations, including real-time data handling, caching strategies, and network resilience

Collaborate with Product and Design teams to create polished user experiences featuring native interactions, animations, and gestures

Own and manage the mobile release lifecycle through CodePush, TestFlight, and Google Play





Monitor and optimize application performance using analytics and attribution platforms such as Firebase, GTM, and AppsFlyer

Establish engineering best practices, testing frameworks, tooling standards, and development processes for the mobile team

Requirements

4+ years of experience developing and shipping production mobile applications for both iOS and Android

Expert-level React Native and TypeScript experience

Strong understanding of mobile architecture, state management, navigation, and performance optimization

Experience working with analytics, user attribution, experimentation frameworks, and push notification platforms

Hands‑on experience managing App Store Connect and Google Play Console

Robust knowledge of mobile performance diagnostics, profiling, and troubleshooting issues such as memory leaks and bridge bottlenecks

Comfortable working in a fast‑paced, entrepreneurial environment

Passion for delivering exceptional user experiences with a keen eye for design detail

Strong communicator who can effectively challenge and influence product decisions when needed

Nice to Have

Experience within sports betting, gaming, iGaming, sweepstakes, fintech, or other real‑time consumer products

Exposure to onboarding, activation, retention, and lifecycle-focused product initiatives

Knowledge of Swift and/or Kotlin

Experience contributing to product strategy and feature ideation

Familiarity with experimentation platforms, attribution tools, and engagement systems

What's on Offer

Competitive compensation package

Significant technical ownership and autonomy

The opportunity to influence the development of a rapidly growing mobile product

A collaborative engineering culture focused on innovation and delivery

Hybrid working flexibility in Toronto

Team events, social activities, stipend benefits, and a highly engaged work environment

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📌 Senior Mobile Developer | React Native | iGaming (Ontario)
🏢 Pentasia
📍 Ontario