Freelance React Native Developers in FrankfurtFreelance React Native Developers in Frankfurt
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Sergio Pereyra's avatar
Sergio Pereyra
Frankfurt, Germany
Rescuing delayed SaaS, AI & mobile product launches
$1k+
Earned
3x
Hired
5.0
Rating
51
Followers
Rescuing delayed SaaS, AI & mobile product launches
Cover image for Took Beepr from Capacitor WebView
Took Beepr from Capacitor WebView prototype to production React Native + Expo Bare. Audited 51 Supabase Edge Functions, rebuilt background geolocation for native, added PostGIS. Zero downtime. 100% background geolocation reliability. If your app outgrew its prototype, DM me.
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184
Cover image for One thing I learned migrating
One thing I learned migrating a mobile product from a WebView MVP to React Native: the hardest problems usually aren't the screens. On Beepr, the real blockers were background execution, geolocation reliability, push notifications, slow geospatial queries, and backend logic that had grown without a clear audit trail. I led the migration to React Native with Supabase, PostgreSQL, PostGIS, and native background capabilities. I also audited 51 Supabase Edge Functions and designed a zero-downtime cutover so the product could keep serving users during the transition. The takeaway: before rebuilding a mobile app, find out which problems are architectural and which are merely visual. A prettier interface won't fix unreliable background services, weak location enforcement, or slow queries. Curious what other teams have found when moving from a WebView-based MVP to a production mobile app. 8:58
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2
238
Cover image for Is your SaaS, AI, web,
Is your SaaS, AI, web, or mobile product delayed, unstable, or difficult to coordinate? Start with a paid Rescue Assessment. I’ll identify the main delivery bottleneck, major risks, recommended next steps, and a realistic delivery plan and estimate. It’s designed for founders who need clarity before committing to a larger build or delivery engagement. If the fit is right, the assessment fee can be credited toward ongoing GCGI work. Send me your current bottleneck, target date, and budget.
1
85
Cover image for Beepr: WebView Prototype to Native Mobile App
Beepr: WebView Prototype to Native Mobile App
0
10
React Native Developer(3)
Wilfredo Casas's avatar
Wilfredo Casas
Frankfurt, Germany
MVP in 30 Days: Rapid Design & Full-Stack Development
MVP in 30 Days: Rapid Design & Full-Stack Development
Cover image for Super Recogniser
Super Recogniser
0
8
Cover image for Personal Website: www.wilfredocasas.com
Personal Website: www.wilfredocasas.com
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12
Cover image for Whale, a social geolocation app.
Whale, a social geolocation app.
0
12
Cover image for Jobdirecto, a job portal for Hispanic immigrants in New York
Jobdirecto, a job portal for Hispanic immigrants in New York
0
8
React Native Developer(1)