Freelancer profile translated to English.
Back to original languageAbout Johan
I enjoy critical systems and teams with high standards.
Software engineer since 2017, Java Spring developer since 2019, with a strong appetite for DevOps, automation, and applied AI.
I built my experience in sectors where reliability is non-negotiable: banking (Société Générale), nuclear energy (EDF), healthcare (Softway Medical, Ministry of Health).
On my recent assignment: banking regulatory calculation (RWA) on large volumes, in Java 21 / Spring Boot 3.4, deployed on AWS and Kubernetes, with an end-to-end CI/CD pipeline — from build to security (DevSecOps, CVE remediation, Nexus → JFrog migration) through to run and releases.
AI interests me as much as it makes me critical: beyond efficiency, I remain attentive to not losing the taste for effort or the ability to search for myself — this is how we truly learn and retain. For example, I designed an automatic meeting minute generation pipeline (audio diarization + LLM producing a structured document).
My Executive Master in General Management (EM Lyon) extends a conviction I've held for a long time: a developer's value is not limited to code. Bridging the gap between technical and business teams, simplifying complex concepts, supporting change, and upskilling junior members are part of my way of working.
Originally from Lyon, I recently moved back to Lyon (easy commute from Paris). Available October 5th for a long-term assignment.
Java · Spring · Craftsmanship · AWS · Kubernetes · DevSecOps · Bash · AI
French
Native or bilingual
English
Fluent
Can work on-site
Lyon (up to 30km), Paris (up to 10km)
Experience
- Société GénéraleJava AWS DeveloperBANKING AND INSURANCEJuly 2024 - Today (2 years and 1 month)Paris, FranceDevelopment of Java banking regulatory calculation applications (including RWA) in an AWS ecosystem, handling large data volumes and high performance requirements; regulated and critical environment, in a demanding agile team, with a strong infra/DevOps dimension.- Design and development of Java 21 / Spring Boot 3.4 applications, deployed on AWS (Lambda, EC2, S3, ECS, Step Functions, CloudFormation, CloudWatch) and on SG's internal cloud via Kubernetes; FitNesse acceptance tests.- Run & release: management and deployment of the quarterly release of the main application and about ten auxiliary applications; production on-call rotation (one week every two months)- DevSecOps: integration of security audits on several Jenkins pipelines; development of a Jenkins job to list CVEs blacklisted by SG; end-to-end Nexus → JFrog migration (dev + ops + change management), with automated CVE identification by project (’jf audit’ & ‘jf scan’) in build pipelines and remediation of found CVEs. Jenkins job for monitoring and sending weekly reports after analysis of all projects.- Tooling via GitHub Script Server: analysis scripts querying JSON files of several hundred GB, saving tens of minutes per result and reducing database saturation (’jq’, ’mc’); script to reduce client input to speed up and reduce calculation costs, or isolate the minimum necessary for debugging; daily assistance scripts (purge of unused AWS Target Groups, simplified launch of functional calculations for newcomers, script for retrieving and formatting AWS load balancer logs, etc.).International context, daily work in English.Stack: Java 21, Spring Boot 3.4, AWS, Kubernetes, Jenkins, JFrog (Artifactory, Xray), Groovy, Bash, FitNesse.[ Jarvis Team at CFT ]
- Ministère de la Santé et de la PréventionJava - Angular DeveloperMEDICALJune 2023 - April 2024 (10 months)Paris, FranceNational dematerialization of medical facility authorization requests for the Ministry of Health and ARS (replacement of a paper process: 26,000 files/year, 30,000 target users). Go-live under legal constraints (January 2024) met: 8,000 users and 4,000 files in the first months._ Work within an agile team of about ten people (5-6 developers, 2-3 proxy-POs, 2 POs)._ Critical project requiring rapid development to handle a complex history. I joined the team mid-project.Objective:- Go live on time under very tight deadlines (before January 2024) for the opening of the file submission portal (legal framework) -> Done,- Version v2 with numerous complementary elements necessary for file validation, as well as an MCO part -> Done.My Role: FullStack Developer.- Numerous backend features in Java 17 / Spring Boot 2.5, Angular frontend components,- Use of Lombok and Swagger (frontend element generation)- Continuous integration with GitLab CI,- PostgreSQL: schema evolutions, foreign keys, rights management.- Document generation with FreeMarker: letters, Word, PDF, Excel populated with application data.- File management on Linux server.Skills: Java · Angular · Spring Boot · Agility · PostgreSQL · Database · Gitlab CI · TypeScript · Technological Watch · Software Development · SQL · Team Spirit · Critical Thinking · Oral Communication · Interpersonal Communication · Technical Design · Freemarker · Java Development · CSS · Lombok · Adaptability · Agile Methodologies · Entrepreneurship · Swagger API
- Softway MedicalJava / Vue 3 DeveloperMEDICALJune 2022 - June 2023 (1 year)Lyon, FranceLeading European health software provider (1,200 radiology practices, 1,100 facilities equipped). Tribe of 7 people on the main product (100+ commits/week on master): modernization of a monolith and new microservices, in a craftsmanship approach.Java / Vue 3 Developer:- Work on an agile project divided into several tribes.- Large-scale project with over 100 commits on the master branch each week for the main project.My responsibilities:- Java 17 + Quarkus + Mongo for the micro-service,- Java 8 with some struts / Spring bean xml for the monolith,- "API-fication" of old existing modules,- TDD implemented on the fly but mostly respected: all my backend developments were covered by unit tests.- Vue3 Frontend Development, using a custom Design System,- Participation in structuring technological choices,- Docker container deployment with Openshift,- Craftsmanship: DDD, hexagonal architecture, TDD, best practices.**Skills**: Java · Vue 3 · Software craftsmanship · Quarkus · Spring Framework · Test Driven Development · SQL · Docker · OpenShift · Domain-Driven Design · Technological Watch · Hexagonal Architecture · MongoDB · Agile Methodologies · Database · Agility · Clean code · Software Development · Critical Thinking · Oral Communication · Team Spirit · Professional English · Interpersonal Communication · Technical Design · Java Development · CSS · Adaptability · Entrepreneurship · TypeScript
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Education
- Executive Master in General ManagementEmlyon2024Stratégie, Marketing, Pilotage, Management agile et responsable, finance, pilotage de la performance, conduite du changement, transformation digitale, intelligence émotionnelle
- Amazon Web Services (AWS) - Technical FundamentalsIg cegos2024
Certifications
- Certified SAFe 5 PractitionerScaled Agile Framework Enterprise Certification2020