Staff Mobile Engineer (React Native)

TL;DR

Staff Mobile Engineer (React Native): Build and ship features for iOS & Android apps used by 850,000+ users with an accent on mobile architecture, performance, and AI-assisted development. Focus on defining platform evolution, optimizing data flows, and delivering polished experiences under high velocity.

Based in Europe, within 2 hours of Paris time zone (CET/CEST), able to attend onsite weeks in Paris every 6 weeks (travel and accommodation covered). Not hiring outside this range.

€80-110K (Level 4) to €100-130K (Level 5), higher for outstanding profiles.

Company

One-stop shop for investing with 850,000+ users, tracking assets, budgets, and finance education. Raised €25M Series B led by PayPal Ventures.

What you will do

• Build and ship end-to-end features on mobile apps.
• Shape mobile architecture and platform evolution.
• Define API contracts and optimize data flows with backend.
• Deliver performant experiences with product and design teams.
• Leverage AI tools to boost productivity.
• Improve mobile performance, reliability, and developer experience.

Requirements

• Strong expertise in React Native with Expo (mandatory).
• Understanding of backend systems and CS fundamentals.
• Deep knowledge of mobile challenges: performance, offline, navigation, platforms.
• Experience using AI tools (Claude Code, Cursor, Codex) for productivity.
• Staff level: shape architecture, mentor, drive direction.
• Fluent English (written/spoken).

Nice to have

• Native iOS (Swift) or Android (Kotlin) experience.
• Fintech or personal finance mobile experience.

Culture & Benefits

• Hybrid: remote in Europe with Paris onsite 6x/year (travel covered).
• High-autonomy, high-velocity shipping with senior team.
• Modern stack: React Native/Expo/TS, Rust/Ruby/Python backend, GCP.
• AI tooling provided; focus on judgment and architecture.
• Impactful work improving financial lives.