Marc P.

Context

What I designed and developed

• **Modern full-stack architecture deployed on Vercel**: React front-end application with server-side rendering (Next.js), serverless API routes, automated continuous deployment on every Git push.
• **Turso database (distributed edge SQLite)**: Storage of anonymized profiles, generated programs, and usage metrics. Performance and cost-effective choice, with ultra-fast response times thanks to edge computing.
• **AI Integration via Groq**: Use of the Groq API for high-speed LLM inference. Design of specialized prompts for sports coaching: considering the goal (5K, 10K, half, marathon, trail), level, age, gender, potential injuries, and fitness. Generation of structured, progressive, and unique programs for each user.
• **Multi-profile coverage**: Road running, trail, postpartum return, post-injury recovery, beginners. The AI automatically adapts load, progression, and safety instructions based on the situation.
• **PDF Generation**: Automatic export of the complete program, ready to print or store on mobile.
• **Pro Area under deployment**: Offering for coaches and gyms to generate programs at scale for their members.
• **UX designed for conversion**: Frictionless journey (no registration), clean interface, minimal generation time to maximize completion rate.

Technical Stack:

Context

What I designed and developed:

• **Complete SaaS architecture**: JS back-end, SUPABASE database, REST API structured with API key authentication, intelligent caching system for instant responses.
• **Real-time economic calendar API**: Collection, normalization, and dissemination of 50+ major indicators, with support for 10 time zones (Paris, London, New York, Tokyo, Sydney, etc.).
• **AI Integration (LLM)**: Daily briefings generated by artificial intelligence summarizing the day's issues, volatility windows, currencies to watch. Individual analysis of each announcement on demand.
• **Telegram alert system**: Automatic daily digest sent before market open, filterable by impact level (high/medium/low), configurable by the user.
• **Multilingual platform**: Interface and content available in 5 languages (FR, EN, DE, JA, ZH).
• **Freemium model with 3 plans (Free, Basic, Pro)**: Subscription management, usage quotas, user dashboard.
• **Infrastructure & DevOps**: Deployment on Vercel, SSL, monitoring, automated backups, CI/CD.
• Complete API documentation with Postman collectionfor 5-minute integration (Python, JavaScript, PHP).
• **Technical Stack**: NextJS, REST API, Supabase, Vercel, LLM integration (Groq), Telegram Bot API, caching system, Git, CI/CD.

Context

Diagnostics and fixes performed

• **Complete audit of each site**: Error identification via server logs (error.log, access.log), database inspection, verification of WordPress core files, analysis of plugin conflicts.
• **Navigation fix**: Rewriting permalinks, fixing hardcoded URLs in the database (serialized search & replace), checking the .htaccess file and Apache/Nginx rewrite rules. Resolving broken internal links and redirect loops.
• **Server configuration fix**: Adjusting PHP configuration (memory_limit, max_execution_time, upload_max_filesize), correcting file and folder permissions (chmod/chown), checking SSL configuration and HTTP/HTTPS redirects, correcting DNS entries and the wp-config.php file (WP_HOME, WP_SITEURL, DB parameters).
• **Plugin fix and update**: Identifying conflicting or incompatible plugins with the target PHP/WordPress version. Secure update of critical plugins, deactivation of obsolete modules, reconfiguration of cache and security plugins post-migration. Non-regression testing after each update.
• **Final checks**: Testing all pages and forms, performance check (load time, DB queries), Google indexing check (Search Console) and SSL certificates.

Stack & Tools