Freelancer profile translated to English.
Back to original languageAbout Franck
About
Computer Science Engineer (EPITA) with over 10 years of experience, I handle backend issues that block a feature, a billing process, or a deployment.
I work in a simple and clear way: **diagnosis, action plan, clean fix, tests, documentation**.
What clients generally appreciate
- Quick diagnosis
- Transparent communication
- Clean and readable fixes
- Reliability in urgent situations
The problems I most often solve
- Stripe or Shopify webhooks no longer triggering
- API returning 500 errors, timeouts, or auth errors
- S3 or Cloudinary uploads failing
- Unstable tokens or refresh tokens
- Stripe subscriptions with errors
- Blocked GitLab/GitHub Actions pipelines
- Broken backend migrations
If you're in this situation, I can intervene quickly.
My way of working
I prefer to say "I don't know yet" rather than overpromise.
I never disappear: you always know what has been done and what remains to be done.
I prioritize deliveries that are **simple, clean, and easy to maintain**.
Top Skills
- Backend & API : REST, GraphQL, 500 error debugging, CRUD, JWT/OAuth auth, validation
- Webhooks & Integrations : Stripe, Shopify, Slack, GitHub, Notion
- Stripe : Checkout, subscriptions, Billing
- Storage & Uploads : S3, Cloudinary, Supabase
- Light DevOps : Docker, GitLab CI, GitHub Actions, GCP/AWS deployments
Packs for quick missions
- Webhook Rescue – €299
- API Fix Fast – €199
- CRUD Express – €399
- File Upload Safe – €499
Intervention Examples
- Stripe flow unblocked and fixed in 30 minutes
- 500 API error isolated, fixed, tested, and deployed the same day
- S3 upload made stable and faster
Tagline
I am often the person called when a backend is blocked.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- WebynFull Stack DeveloperSOFTWARE PUBLISHINGMay 2024 - September 2025 (1 year and 4 months)Levallois-Perret, FranceParticipation in the development of an automated B2B SaaS CRO optimization platform integrating AI to improve website conversion rates.Contribution to infrastructure migration to GCP, ensuring scalability, reliability, and better performance.Support for the data team: implementation of good development and code architecture practices to enhance quality and maintainability.Technical and managerial supervision: daily management of the development team, onboarding new employees, and mentoring an intern.Direct involvement in strategic recruitment: developers and DevOps for the platform division, as well as integration developers for the CRO teams.Cross-functional collaboration between product, data, and technical teams to accelerate the delivery of new features.
- TESSI RéunionDeveloperApril 2022 - April 2024 (2 years)St.-Denis, ReunionDevelopment and deployment of business applications internally and for group clients using the Laravel framework.For certain projects, successful integration of OS/400 into the final infrastructure.
- Data-PrismeFull Stack DeveloperMarch 2019 - February 2021 (1 year and 11 months)Reunion, ReunionMain mission: Frontend & backend development of client projectsSecondary missions
- Development of internal tools
- Deployment of models developed by Data Scientists
- Contract work in the Orange Data team
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Education
- Computer Engineering DegreeÉcole Pour l'Informatique et les Techniques Avancées, Le Kremlin2013
- BaccalaureateLycée Georges Brassens2008