About Johann
French
Native or bilingual
Experience
- MyUnisoftRuby DeveloperSOFTWARE PUBLISHINGApril 2025 - Today (1 year and 2 months)Toulouse, FranceProject:Development of a SAAS in the management field for VSEs / SMEs.Team:Between 4 & 10 peopleMethodology:Agile / ScrumResponsibilities:
- Backend Developer in the Custom team.
- Development of specific features for each client.
- Key Account client support.
Skills:Ruby, Ruby on Rails, RSpec, ActiveJob, SidekiqJob, Devise, NewRelic, PostgreSQL, Redis - Henri TripLead Developer - Ruby on Rails / React DeveloperTRAVEL AND TOURISMJanuary 2023 - January 2025 (2 years)Toulouse, FranceProject:Development of a web & mobile application for digital travel guides.Team:Between 3 & 5 peopleResponsibilities:
- Lead Developer
- Understanding client needs
- Backend development in Ruby on Rails (API)
- Frontend development in React
- Implementation of the mobile application in React Native
- Use of the Expo library (components)
- Use of PostgreSQL
- Implementation of Redis for the cache system
- Implementation of Bugsnag for logging and monitoring errors
- Implementation of Devise for authentication
- Implementation of API versioning
- Adaptation of the API for the mobile application
- Implementation of API documentation with APIPie
- Use of external APIs such as Stripe, Google Analytics, Mailjet (SendInBlue), ChatGPT, AppStoreConnect, AWS S3, WebFlow
- Implementation of tools such as Google Analytics, Clarity, FireBase, …
- Use of Capistrano for deployment
- Deployment carried out on Scaleway
- Code Reviews
- Frontend: Use of Typescript, ESLint/Prettier & styled-components
- Maintenance of 5 mobile applications & their associated backends for the Pierre Fabre group and the Pierre Fabre Foundation
- 4 applications in React Native, 1 in CapacitorJS
- 2 backends in NodeJS, 1 in Python
- Deployment via Gitlab CI/CD on OVH
- Use of PostgreSQL, Devise, Sentry, TypeScript
- Creation of a Web application for physiotherapists in Ruby on Rails & React
Skills:Ruby, Ruby on Rails, APIPie, Bugsnag, Devise, Expo, PostgreSQL, Redis, React, React Native, Typescript, Capistrano, Sentry - Unkle/LukoLead Developer - Ruby on Rails / React DeveloperBANKING AND INSURANCENovember 2019 - December 2022 (3 years and 1 month)Paris, FranceProject:Development of a SAAS in the unpaid rent insurance sector.Team:Between 4 & 9 peopleResponsibilities:
- Lead Developer / Engineering Manager
- Understanding client needs
- Backend development in Ruby on Rails (API), frontend in React
- Use of PostgreSQL, Redis & Sidekiq
- Use of ActiveJob then SidekiqJob for fraud detection, OCR or any other automatic tasks
- Implementation of API versioning and API documentation with Zero Rails OpenAPI
- Generation of PDF contracts with WickedPDF (wkhtmltopdf)
- Creation of the payment and billing system
- Implementation of a feature flag system
- Implementation of unit tests with RSpec (& SimpleCove)
- Database optimization and migration (indexing, read replicas, …)
- Implementation of a robust and resilient architecture for deployment via AWS (multiple regions and availability zones, Auto Scaling, Backups, Load Balancers)
- AWS Services: EC2, EC2 Auto Scaling, S3, RDS, ElastiCache, ECR, ECS, Elastic Load Balancing, Route 53, CloudFront
- Generation of image thumbnails with MiniMagick, Excel documents with Axlsx
- External APIs such as Stripe, Google Analytics, AWS S3, Hubspot, SendGrid, SMS Partner, Yousign, Boursorama, Slack, PAP (pap.fr), WebFlow,...
- Implementation of tools such as Google Analytics, Clarity, Hotjar, …
- Recruitment & Management of the entire technical team
- Creation of all mandatory documents for compliance with GDPR and obligations related to our status as a broker
- Security and GDPR compliance, annual external audit (Grant Thornton Group)
- Numerous POCs carried out
- Frontend: Use of Typescript, ESLint/Prettier, styled-components and StoryBook
Skills:Ruby, Ruby on Rails, R Spec, SimpleCove, ActiveJob, SidekiqJob, OCR, Devise, BugSnag, PostgreSQL, Redis, React, Typescript, Docker, Metabase
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Education
- Digital Technology Architect422020Architecte en Technologie du Numérique
- CPGE - MPSILycée Henri Bergson - Angers (49)2015CPGE - MPSI