Freelancer profile translated to English.
Back to original languageAbout Corentin
🚀 Tech Lead JAVA
With over 20 years of experience, I design and develop robust, high-performance, and scalable full-stack solutions. Since 2022, I have been training DevOps teams and managers in Green IT best practices to reduce the digital environmental footprint.
🔹 Recent Achievements
- Natixis – Stock Market Risk Calculation (Java, Spring Boot, Kafka, SQL): Optimized pricing, calculation time reduced from 12 min to <1 sec, scalable architecture.
- PayPlug – Payment Platform (Java, Spark, BigQuery, SQL): +30% performance, reliable CB2A protocol, scalable architecture.
- SIGAL – Shipyard ERP & CRM (Java 17, Spring, TS, PostgreSQL): Modules delivered, dynamic front-end dashboard, team upskilled, Green IT integrated.
🔹 My Full-Stack Approach
- Frontend: Angular, TS, React
- Backend: Java 17/21, Spring Boot, Node.js, Rust
- DevOps & Cloud: Docker, CI/CD, K8s, Cloud Run, PostgreSQL
- Green IT: Performance and digital sobriety
🔹 Services
- Custom full-stack development
- Performance, security, and maintainability optimization
- Application migration, redesign, and modernization
- Green IT training for DevOps and managers
🔹 Why Choose Me?
✓ Senior expertise and pragmatic approach
✓ Fast and iterative delivery
✓ Scalable, secure, and maintainable architecture
✓ Post-delivery support and knowledge sharing
📩 Contact me to transform your project into a high-performance and sustainable solution. Response within 1 hour.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Lille (up to 50km), Strasbourg (up to 50km), Orléans (up to 40km)
Experience
- 8 POINTSIndependent Trainer – Development and Green ITEDUCATION AND E-LEARNINGOctober 2022 - Today (3 years and 8 months)Independent Trainer – Development and Green IT
- Guiding development teams in designing and implementing more sustainable and environmentally friendly applications and information systems.
- Practical training and strategic advice to reduce the carbon footprint of software while improving performance and maintainability.
- Raising awareness of Green IT best practices and adopting concrete, immediately applicable solutions.
**Clients**: Algofi, Malt, LeHibou, CarbonIT, GoMind, INOCO, SIGAL**Key Impact**: more efficient teams, optimized and sustainable software, direct contribution to responsible digital transformation. - NatixisBackEnd JAVA DeveloperBANKING AND INSURANCEJune 2025 - February 2026 (8 months)Paris, FranceBackEnd Developer – Risk Calculation on Stock Market Transactions
- Participation in the aggregation engine for EEPE indicator calculation.
- Refactoring and major evolution of the "Perturbatif" service: evaluating the risk of a future trade on a portfolio for SUMMIT and MUREX FX deals, with parallel asynchronous calls to an external service.
**Stack**: Java | Sybase | SQL | Apache KafkaKey Achievements- Significant reduction in technical debt and improvement in maintainability.
- Pricer optimization: calculation time reduced from 12 minutes to less than a second.
- Implementation of a robust and scalable architecture, ready for future developments.
- - PayPlugBackEnd JAVA Protocol DeveloperE-COMMERCEMay 2024 - January 2025 (7 months)Paris, FranceBackend Developer - Payment Management Platform
- Java development of a modern platform to centralize and unify all payment flows.
- Design and implementation of the CB2A protocol, ensuring reliable and standardized transaction mapping.
- Optimization of credit card number aggregation processes from six different sources using Spark, BigQuery, and SQL.
**Stack**: Java | Spark | BigQuery | SQLResults- Performance improved by 30% in processing times, accelerating critical processes.
- Robust and scalable architecture, ready for load increases and future evolutions.
- Reduction of operational complexity and significant improvement in maintainability.
-
Recommendations
FU
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- MASTER MTI, Information Technology ManagementIAE Aix-en-Provence2005MASTER MTI, Management des Technologies de Information
- DESS in Computer Science and StatisticsUniversité de Provence20032003, Informatique et Statistique
Certifications
- Green IT - Digital LCAGreenIT.fr2022
- GreenIT - ECO-DESIGN OF DIGITAL SERVICESGreenIT.fr2022