Senior Full-Stack Engineer (React Native Expert)
Senior Full-Stack Engineer (React Native Expert)
Full-time On-site Paris, France
€70k - €80k
EU citizens only
About this role
As a Senior Full Stack Engineer, you'll have high ownership over mobile app development for a B2B company serving agri SMEs, exporters, and enterprise buyers. You will deliver end-to-end features across Android and web platforms.
Daily responsibilities:
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Design and build customer-centric UIs: empathize with field cooperators and enterprise teams to deliver intuitive, performant apps.
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Own full feature lifecycle: ideate, build, test, deploy, monitor, and iterate on production-quality features like farmer enrollment, order flows, and traceability dashboards.
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Ship fast, measure impact: break features into deliverable milestones with measurable metrics (e.g., onboarding flow conversion, app startup under 2s).
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Build cross-platform excellence: develop React and React Native (Android) interfaces with seamless UX.
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Implement offline-first sync logic: use Supabase RealTime features with conflict resolution for low-connectivity environments.
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Develop robust backend services: build APIs, business logic, and Supabase integrations in Node.js/TypeScript (Cloudflare Workers).
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Integrate AI tooling: enhance teams via code agents, prompt-based scaffolding, and AI-assisted QA pipelines.
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Collaborate with peers: pair program with the Lead Engineer, share code reviews, and jointly reduce tech debt.
Seniority & Experience:
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4+ years building mobile Android apps with React Native for top-tier VC-backed startups (pre-seed to Series A).
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Former founder or founding engineer at a VC-backed tech startup is highly valued.
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Experience with AI infrastructure tools to build agentic workflows (beyond Cursor).
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High ownership, entrepreneurial mindset, and proactivity to tackle new projects, potentially across different countries.
Hard Skills:
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Demonstrated excellence in React Native for mobile Android development.
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Proficient across the stack (50:50 frontend/backend, slight frontend lean acceptable) including JavaScript/TypeScript, Node.js, React, Supabase, and related technologies.
Soft Skills & Miscellaneous:
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High energy, proactive, and entrepreneurial.
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Fluency in English required; French or Spanish (Italian, Portuguese, or similar languages) is a plus.
Traits to Avoid:
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Frequent short tenures (multiple ~1.5 year stints).
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Overly entrenched in one company (8+ years in one place).
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“Big Tech” mentality; the role requires ownership and driving projects independently.
Salary: €70k - €80k
Currency: EUR
Equity: Competitive
Visa sponsorship: Not available; EU citizens only
On-site work policy: 4 days per week in Paris
Full-time position
Location: Paris, France
Tech Stack: JavaScript, TypeScript, React, React Native (Android), Node.js, Supabase, Cloudflare Workers
Mission:
The company provides chocolate producers with cacao sourced directly from cooperatives transitioning to regenerative practices. Scaling regenerative agriculture by supporting tropical farmers with new technology and better prices—for farmers, the planet, and the companies producing the products we love.
Impact Metrics:
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35% of the world’s food production comes from farms under 10 hectares, needing tailored climate solutions.
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72% of tropical deforestation is driven by small-scale farmers.
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Dark chocolate has the second highest food carbon footprint after beef.
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70% of cacao comes from West Africa (up to 90% of those farmers live in poverty).
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~175 million tons of CO₂ can be sequestered by growing cacao regeneratively.
Team Size: 0-50 employees
Founded: 2024
Total Funding: $1.5m
Interview Process:
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Initial Screen (30 minutes)
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Technical Screen (2-3 hours)
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Final Round (2-3 hours)