---
About arenaflex and the Vision Behind Our AI‑Driven Mobile Experience
arenaflex is at the forefront of the artificial‑intelligence revolution, dedicated to making AI accessible, open, and seamlessly integrated into everyday life. Our flagship product, le Chat, is a revolutionary AI companion that engages users through natural‑language conversations, provides real‑time assistance, and learns continuously to become more helpful every day. Since its launch, le Chat has achieved over a million downloads in the first two weeks, demonstrating a massive appetite for intelligent, user‑centric mobile experiences.
We operate across a vibrant, distributed team in France, the United Kingdom, and the United States, fostering a collaborative culture that prizes creativity, low‑ego teamwork, and relentless curiosity. At arenaflex, you will be part of a tight‑knit group of innovators who are passionate about shaping the future of mobile AI and delivering products that users love and rely upon daily.
Why This Role Matters – The Impact You’ll Have
As the Lead Mobile Engineer (React Native), you will steer the technical direction of our mobile ecosystem, ensuring that le Chat not only meets but exceeds user expectations for performance, reliability, and delightful interaction. Your leadership will empower a high‑performing engineering team to turn ambitious product visions into polished, ship‑ready features that delight millions worldwide.
Core Responsibilities
- Innovate and Inspire: Lead the design, prototyping, and implementation of breakthrough mobile features. Work closely with the Mobile Lead to push the boundaries of what React Native can achieve in AI‑driven contexts.
- Team Empowerment: Serve as a facilitator and mentor, removing technical blockers, fostering a culture of continuous learning, and enabling engineers to focus on delivering high‑impact solutions.
- Bridge Product and Technology: Partner with the Product Lead to translate strategic vision into concrete technical road‑maps, ensuring UI/UX decisions are both elegant and technically feasible.
- Cross‑Functional Collaboration: Align with product managers, designers, data scientists, and backend engineers to create cohesive, end‑to‑end experiences that delight users and drive business metrics.
- Performance Excellence: Own the performance profile of the mobile app—optimizing load times, memory usage, and responsiveness to guarantee a buttery‑smooth user experience.
- Architectural Vision: Evolve the mobile architecture to stay ahead of industry trends, integrate secure mobile payment solutions, and support scalable AI inference on‑device.
- Code Quality & Automation: Champion rigorous code review practices, enforce unit‑testing standards, and expand automated CI/CD pipelines to maintain a pristine codebase.
- Thought Leadership: Keep abreast of emerging mobile technologies, share insights across the engineering community, and mentor junior engineers to grow their expertise.
- End‑to‑End Ownership: Participate in the full software development lifecycle—from concept and design through deployment and post‑release monitoring—ensuring each release meets our high standards for quality and reliability.
Essential Qualifications & Experience
- 5+ years of professional experience building production‑grade mobile applications with React Native, preferably in consumer‑facing (B2C) environments.
- Demonstrated track record of leading mobile engineering teams, ideally within fast‑paced startups or high‑growth tech companies.
- Deep understanding of mobile UI/UX principles and a strong consumer‑centric design sensibility.
- Proven ability to translate product strategy into technical execution with clear architectural decisions.
- Excellent problem‑solving skills, autonomy, and a self‑starter attitude that thrives in ambiguous, high‑impact settings.
- Outstanding verbal and written communication skills, capable of influencing stakeholders across product, design, and executive leadership.
Preferred Skills & Nice‑to‑Have Experience
- Experience with modern web development stacks, especially React (frontend), to bridge mobile and web experiences.
- Hands‑on familiarity with AI‑centric products, including integrating on‑device machine‑learning models or consuming AI APIs.
- Knowledge of mobile payment ecosystems, in‑app purchases, and secure transaction handling.
- Understanding of CI/CD tooling specific to mobile (e.g., Fastlane, Bitrise, Azure DevOps).
- Exposure to TypeScript, GraphQL, or other modern data‑fetching technologies that complement React Native.
Key Competencies for Success
- Leadership & Mentorship: Ability to inspire, coach, and develop engineers at all experience levels.
- Strategic Thinking: Vision to anticipate market trends and align engineering roadmaps with business objectives.
- Technical Depth: Mastery of React Native internals, native module bridging, and performance profiling tools.
- Collaboration: Comfortable navigating cross‑functional dynamics, building consensus, and delivering on shared goals.
- Customer Empathy: Passion for understanding user pain points and translating them into delightful mobile features.
Career Growth & Learning Opportunities at arenaflex
Joining arenaflex means you’ll be positioned at the cutting edge of AI‑enhanced mobile technology. You’ll have direct access to our world‑class AI research team, enabling you to experiment with the latest large language models, on‑device inference techniques, and generative AI capabilities. As you grow, you can transition into senior leadership roles such as Director of Mobile Engineering, or expand your influence by working closely with product strategy on global go‑to‑market initiatives.
We invest heavily in continuous learning—offering a generous education stipend, conference sponsorships, internal tech‑talk series, and dedicated time for personal projects that align with arenaflex’s mission.
Work Environment, Culture & Values
Our distributed teams operate with a high degree of autonomy while staying deeply connected through regular virtual coffee chats, quarterly in‑person gatherings, and collaborative sprint ceremonies. arenaflex prides itself on a low‑ego, meritocratic culture where ideas are judged on their value, not on seniority. We champion diversity, inclusion, and psychological safety, ensuring every voice is heard and respected.
We believe that a balanced life fuels creativity. Our flexible working hours, remote‑first policy, and generous paid time off empower you to bring your best self to work every day.
Compensation, Perks & Benefits
Competitive Cash Salary & Equity – We offer market‑aligned salaries supplemented with an attractive equity package, aligning your success with the long‑term growth of arenaflex.
Health & Well‑Being – Comprehensive health, dental, and vision insurance covering you and immediate family members (applicable in France, the UK, and other regions).
Family Support – Generous parental leave policies and childcare assistance to help you balance professional and personal responsibilities.
Food & Lifestyle – Daily lunch vouchers (France), monthly gym membership subsidies (Gympass or equivalent), and mobility allowances (public transport or parking reimbursements).
Retirement & Financial Security – SmartPension contributions (5% employee, 3% employer) and additional retirement savings plans.
Visa Sponsorship & Relocation – We welcome talent from around the globe and provide visa sponsorship, as well as relocation assistance for eligible candidates.
Additional region‑specific perks include UK office parking reimbursements, 90 GBP/month for public transport, and a dedicated budget for professional development.
Hiring Process – What to Expect
- Recruiter Screening (45 min): Quick conversation to explore your background, motivations, and fit for arenaflex.
- Hiring Manager Interview (30 min): Deep dive into technical experience, leadership style, and alignment with the product vision.
- Live‑Coding Exercise (60 min): Real‑time coding challenge focused on React Native problem‑solving.
- System Design Interview (60 min): Assess architectural thinking, scalability considerations, and design of mobile‑centric systems.
- Culture‑Fit Discussion (30 min): Conversation with senior team members to gauge cultural alignment and collaborative mindset.
Ready to Shape the Future of Mobile AI with arenaflex?
If you are a visionary mobile engineer with a passion for AI, a knack for leadership, and a desire to build products that millions love, we want to hear from you. Apply today and join a team that is redefining how people interact with intelligent digital companions. Your expertise will help us create the next generation of mobile experiences—where technology feels personal, intuitive, and unforgettable.
Submit your application now and start your journey with arenaflex