Staff Mobile Engineer

Staff Mobile Engineer About Finary We're building a one-stop shop for investing that gives power back to individual investors. Finary lets users track their assets, manage budgets, invest money, and learn about finance, all in one place. Launched in 2021, we've grown to 850,000+ users. In September 2025, we closed a €25M Series B led by PayPal Ventures, with backing from Y Combinator, Hedosophia, Speedinvest, and founders from Qonto, Photoroom, Bitpanda, UBS, and Wise. We care deeply about user experience, performance, and shipping products that genuinely improve people's financial lives. TL;DR You'll build and ship features used by 850,000+ users on Finary's mobile apps (iOS & Android), working with React Native and Expo in a modern, AI-native engineering environment. This is a high-autonomy role where you'll shape mobile architecture and ship at high velocity alongside a small, senior team. What you'll do - Build and ship delightful features end-to-end on Finary's mobile apps - Contribute to mobile architecture decisions: this isn't just feature work, you'll define how the mobile platform evolves - Collaborate closely with backend engineers to define API contracts and optimize mobile-specific data flows - Partner with product managers and designers to deliver polished, performant mobile experiences - Leverage AI tools (Claude Code, Cursor, Codex) to multiply your output: we believe writing code manually is no longer where your value lies - Raise the bar on mobile performance, reliability, and developer experience What we're looking for - Strong expertise in React Native with Expo (mandatory). Native iOS/Android development experience is a strong plus. - Solid understanding of backend systems and computer science fundamentals: you can work with backend engineers to define contracts and reason about system design - Deep understanding of mobile-specific challenges: performance, offline handling, navigation patterns, platform differences, app store processes - AI pioneer: you've understood that manual code-writing is mostly solved and actively use AI tools to multiply your productivity. If your current company restricts AI usage, you have personal projects that demonstrate your expertise - Staff level preferred: you don't just ship features, you shape the mobile platform's architecture, mentor peers, and drive technical direction - Radical ownership: you own outcomes, move fast, and don't wait for permission - Fluent in English: written and spoken. Our engineering team works in English Nice to have - Experience with native iOS (Swift) or Android (Kotlin) development - Fintech or personal finance mobile experience Tech stack - Mobile: React Native, Expo, TypeScript - Backend (for context): Rust, Ruby, Python - Database: PostgreSQL - Infrastructure: GCP, Terraform - Ops: GitHub, Datadog, Sentry - AI tooling: Claude Code, Cursor, Codex WHAT WE OFFER Compensation - Level 1 (learning the craft): €30-60K - Level 2 (level 1 + autonomy): €60-80K - Level 3 (level 2 + ownership): €70-90K - Level 4 (level 3 + technical leadership): €80-110K - Level 5 (level 4 + shapes company direction): €100-130K - We can go higher for outstanding profiles. This role is open from Level 4 to Level 5 depending on experience. Team You'll join an engineering team of ~30, organized in four full-stack squads (Track, Investment, Crypto, Finary One) plus a platform team (SRE, security, data). Your manager will be an Engineering Manager. You'll work daily with backend engineers, web engineers, product managers, and designers. Squads are fluid: they exist to solve specific problems and evolve as priorities shift. You'll have stability within a squad but move across them as needed. At our current size (3 mobile engineers), there's high flexibility without over-specialization. Benefits - Hybrid setup: teammates across France and Europe, with in-person weeks in Paris 6 times per year (travel and accommodation covered) - Hig ... (truncated, view full listing at source)