Joko

Staff Mobile Engineer

Joko

full-time

Posted on:

Location Type: Remote

Location: France

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Job Level

Lead

Tech Stack

AndroidiOSReactReact Native

About the role

  • Own meaningful parts of our mobile application in production, from technical design to delivery and continuous improvement.
  • Contribute to the definition and evolution of our React Native architecture, while designing, developing, and refactoring features in our mobile application, with a strong focus on scalability, maintainability, and performance.
  • Incrementally improve an existing React Native codebase by adopting modern patterns, best practices, and platform capabilities.
  • Measure, profile, and optimize mobile performance (startup time, rendering, memory, caching).
  • Improve mobile developer productivity by evolving tooling, build systems, debugging workflows, and automations.
  • Provide deep React Native expertise across the team by reviewing designs and implementations.
  • Improve and maintain mobile CI/CD pipelines, testing strategies, and release automation for both iOS and Android.
  • Collaborate closely with backend teams to design and integrate robust APIs and data flows.

Requirements

  • Strong experience in mobile development, with a clear expertise in **React Native** (typically 5+ years).
  • Strong understanding of mobile architectures and performance tradeoffs, with experience building reliable, data-driven applications in production.
  • Strong sensitivity to user experience, performance metrics, and real-world usage at scale.
  • Comfortable working in complex, evolving codebases, with the patience and pragmatism to improve them incrementally.
  • Experience with mobile CI/CD, release processes, testing, and platform-specific constraints (iOS & Android).
  • Able to work effectively within a broader engineering team, and collaborate closely with Product Managers and Product Designers to turn product ideas into high-quality mobile experiences.
  • Fluent in English, both written and spoken. French is not required.
Benefits
  • Flexible remote *(only to specific fully remote positions)*: If you live in Paris, you can choose to work from our office or from home with no constraints. If you live elsewhere, we can provide access to a coworking space and a coworking budget.
  • Work from anywhere *(full-time only)*: Want to spend a month in Italy while working? Full-time employees can work from most countries in the world for up to 3 months per year.
  • 🇺🇸 After 4 years, spend one month in our New York office
  • 🌴 Yearly offsite in amazing locations and budget for team-building events & quarterly in-person gatherings
  • 💪 Contribution to your ClassPass subscription
  • 🍼 8-week paid parental leave
  • …and much more, check the full list here!
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
React Nativemobile developmentmobile architecturesperformance optimizationCI/CDtesting strategiesAPI integrationdata flowsscalabilitymaintainability
Soft Skills
user experience sensitivitycollaborationcommunicationpatiencepragmatism