Freelancer profile translated to English.
Back to original languageAbout Jean-Baptiste
iOS Developer turned Product & Growth Specialist.
After 10 years developing and launching my own apps on the App Store, I've developed a rare expertise: that of someone who understands code, design, and the mechanisms that turn a download into an active, paying user.
App Store & ASO
Optimizing App Store pages (titles, keywords, screenshots) to maximize organic visibility and conversion rates. I understand the workings of the algorithm and the levers to improve ranking without spending on advertising.
Onboarding & Conversion Funnel
Designing and optimizing onboarding flows to reduce churn from the very first minutes. Implementing user journeys designed to maximize activation, conversions, and revenue per user (ARPU).
Monetization & RevenueCat
Structuring subscription offers, paywalls, trial periods, and pricing strategies. Analyzing retention and conversion metrics to iterate on what performs.
Mobile Advertising & User Acquisition
Managing and optimizing acquisition campaigns (Apple Search Ads, Tiktok Ads, Meta Ads). Tracking key KPIs: CPI, ROAS, LTV. Implementing tracking and attribution for data-driven decisions.
Analytics & Product Decisions
Implementing behavioral analytics tools (PostHog, Mixpanel, Amplitude) to understand user journeys, identify friction points, and prioritize product evolutions with measurable impact.
Coordination & Project Management
Accustomed to working with multidisciplinary teams (devs, designers, marketers), I can manage a project from start to finish or provide support on a specific phase.
Available for one-off or regular assignments, 1 to 5 days a week. Feel free to contact me to discuss your project — free diagnostics and estimates. 😊
French
Native or bilingual
English
Native or bilingual
Spanish
Conversational
Remote only
Primarily works remotely
Experience
- Louise
On Malt
iOS SwiftUI Developer / Lead Dev / Product ManagerSeptember 2024 - October 2024Paris, France- SwiftUI Development- Implementation of a reusable architecture for forms- Management of a team of front-end developers- Management of connections with the back-end team- Management of communications with the design team to simplify and improve user experience and accelerate development- Product Manager - LouiseiOS SwiftUI Developer / Lead Dev / Product ManagerSeptember 2024 - September 2024Paris, France- SwiftUI Development- Implementation of a reusable architecture for forms- Management of a team of front-end developers- Management of connections with the back-end team- Management of communications with the design team to simplify and improve user experience and accelerate development- Product Manager
- OniriFounder & CEOHEALTH AND WELLNESSAugust 2014 - Today (11 years and 10 months)Lausanne, SwitzerlandI conceptualized and developed the Oniri app from scratch, an application for keeping a dream journal, analyzing dreams, and lucid dreaming. It integrates numerous technologies, from AI for text analysis and image generation to the use of smartwatches for sleep analysis.This project, which has been my main focus since 2014, has allowed me to develop my skills in:- iOS mobile development (Objective-C, then Swift, then SwiftUI)- Mobile UI/UX design- Back-end development (MongoDB, Python server, integration with numerous tools and APIs)- Web development (Vue.js)- Branding & Logo Design- Web design- SEO- Social Media MarketingAs well as:- Team management- Project & product management- Fundraising- Company administration (Switzerland, France, United States)To learn more: www.oniri.io
Reviews
Atlal
Louise
Reviewed on 11/11/2024
We've once again worked with Jean-Baptiste and wish for all of you to be able to work with someone who can give you quality deliverables and transparent feedback on code reviews, as well as support on anything that will help your project flourish. Will work with JB again :)
Atlal
Louise
Reviewed on 11/11/2024
A great experience with Jean-Baptiste, as usual, competent, simple communication, can manage a project from A to Z proactively, we recommend him with our eyes closed :))
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Education
- Master of Science in Communication Systems, Technology Management and EntrepreneurshipEPFL (Swiss Federal Institute of Technology Lausanne)2021