Freelancer profile translated to English.
Back to original languageAbout Drozo
Your critical PHP application that has been running for 5, 8, 10 years.
Nobody wants to touch it.
Your developers tell you "it's complicated" without being able to explain it to your management.
Modernization budgets never get approved.
This is the daily reality for most IT Directors and CTOs I meet.
My job: transform this invisible technical debt into figures understandable by a board.
Complete audit of your codebase. Risk mapping. Man-day costed remediation plan. 3 budgeted scenarios. All delivered in a report understandable by someone who has never coded. Delivered in 10 to 15 days.
Then, modernization support.
No "from scratch" rewrites – I've seen total rewrites kill companies. We modernize brick by brick, without interrupting production. Strangler Pattern, tests first, targeted refactoring.
Some concrete results:
→ Migration of a Symfony 1.4 to 6.4 on a high-traffic national SEO platform. Without service interruption. Without SEO impact. (HelloWork / Diplomeo, 2 years)
→ Critical SQL query speed improved from 5 seconds to 500 milliseconds on a high-volume e-learning platform. (ECNI)
→ Prometheus / Grafana observability on a high-volume e-commerce platform: shift from reactive to proactive monitoring. (Additi Media, Groupe Ouest-France)
-> CI/CD deployment optimization => 15 minutes => 3 minutes
15 years of PHP (native & framework). Critical missions for large corporations, media, banking, education.
PHP 5.x to 8.x, Symfony 2 to 7, legacy code migration/modernization, Strangler Pattern, testing, observability, CI/CD, SQL.
What I don't do:
Rewrites from scratch on critical legacy systems
Long-term resource assignments without modernization goals
Standard development tasks without a technical debt dimension
If you recognize your situation, let's schedule 30 minutes to talk.
Contact me. Response within 24 hours.
French
Native or bilingual
English
Native or bilingual
Can work on-site
Paris (up to 50km), Rennes (up to 50km), Bordeaux (up to 50km), Lyon (up to 50km), Toulouse (up to 50km)
Experience
- Additi MediaSenior Full-Stack DeveloperPRESS AND MEDIAOctober 2024 - Today (1 year and 10 months)Rennes, France
→ Key results:
- MVP Industrialization: scaling from 10 to 200 users (x20) by implementing scalability, test coverage, caching, and load handling.
- Display time reduced from 15s to 4s on a complex application (multiple API calls, microservices architecture) by refactoring SQL stored procedures.
- Implementation of an upsell module on the ordering tool, contributing to increased average order value.
- Creation of an employee synchronization worker ↔ Salesforce.
- Shift from reactive to proactive monitoring via Prometheus / Grafana — anomaly detection before user reports.
Context: E-commerce platform structured in microservices (DDD, clean architecture). High volume, service continuity requirement. Mission covering both existing modernization and MVP industrialization of new services.Approach:
Industrialization of an MVP: scalability, testing, caching, load handling — to scale from a dozen target users to several hundred.Refactoring of SQL stored procedures to optimize critical paths with high API calls.Design and development of the upsell module (order → average basket impact).Development of an employee synchronization worker with Salesforce.Prometheus instrumentation, Grafana dashboards on critical paths and service health.Alerting on business and technical thresholds — action before user impact.Development of complementary features in compliance with existing DDD standards.Stack:
Symfony 7, PHP 8.*, MariaDB, Docker, GitLab CI/CD, Prometheus, Grafana, Behat, PHPUnit, Cypress, PHPStan, Salesforce API - VoyoLead Symfony Dev | PHP | SQLREAL ESTATEDecember 2024 - June 2025 (6 months)Rennes, France
→ Key result:
Secured a rapidly prototyped platform, from which sensitive data was leaking due to lack of testing and security practices. Fixed vulnerabilities, implemented end-to-end test coverage where none existed, structured CI/CD with proactive monitoring. Critical conversion funnel (search → booking → payment → wallet) now reliable and audited.Context:
Startup in growth phase. Application developed in "ship fast" mode without automated tests or initial security hardening. Sensitive user data was exposed. The conversion funnel is the sole revenue path — every regression costs directly.Approach:
- Security audit, fixing sensitive data leaks.
- Design and implementation of APIs: online payment, booking, user wallet.
- SQL query optimization on the booking path.
- Implementation of unit (PHPUnit), functional, and end-to-end (Cypress) test coverage on the critical path.
- GitHub Actions CI/CD, Sentry monitoring for proactive management.
Stack:
Symfony, PHP 8, MySQL, GitHub Actions, Sentry, Cypress, PHPUnit - ECNISenior Support - Critical V2 Symfony | PHP | SQLEDUCATION AND E-LEARNINGMay 2024 - August 2024 (3 months)Paris, France
→ Key result:
Critical SQL query speed improved from 5 seconds to 500 milliseconds (10x gain) on the hot path of the most used feature. Architecture now ready to accommodate new use cases without performance regression.Context: High-volume platform, blocking UX degradation on the flagship feature. Query called repeatedly, without caching or read/write separation.Approach:
- Analysis of SQL execution plans, identification of missing joins and indexes.
- Query rewrite + index schema adjustment.
- Implementation of a QueryBus via Symfony Messenger (CQRS pattern) to decouple reads and writes.
- Targeted refactoring, unit tests to secure existing behavior.
Stack:
Symfony, PHP 8.1, MariaDB, Symfony Messenger (CQRS), API Platform, PHPUnit, Behat, PHPStan
Recommendations
+2
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Education
- Master in Computer Science, Computer ScienceSUPINFO International University2010Master en informatique, Informatique
- BTS in Management Informatics, Computer ScienceLycée Louise Michel, Bobigny2007BTS Informatique de gestion, Informatique