Stephane BALLET
@stephaneballet
Ruby on Rails engineer who architected Ouiaremakers’ three-sided marketplace and scaled it to 10x peak traffic.
FranceWhat I'm looking for
At Ouiaremakers, I led the architecture of a three-sided marketplace spanning B2C booking, B2B matching, and whitelabel SaaS. I owned its lifecycle from discovery through production operation.
I refactored the monolith into modular services, cutting technical debt 60%, and scaled the platform to 10x peak traffic through PostgreSQL query optimization. I also built GitLab CI/CD and self-hosted observability to help diagnose and prevent production issues.
At Cashpad, I rebuilt a failing POS into a production-ready product used across 7+ countries and delivered NF525 fiscal-compliant ticket chaining. After a planned caregiving break, I’m returning to full-time senior Ruby on Rails engineering in 2026.
Experience
Work history, roles, and key accomplishments
Full-time Parent
Career Break
Jan 2024 - Dec 2026 (2 years 11 months)
Planned career break to care for a young daughter; now returning to senior Ruby on Rails engineering.
Lead Ruby on Rails Architect & Developer
Ouiaremakers
Jan 2017 - Dec 2024 (7 years 11 months)
Led end-to-end architecture of a three-sided marketplace on Rails, PostgreSQL, and Docker, owning the full lifecycle from discovery to production. Drove a monolith-to-modular-services refactor, cutting technical debt 60% and scaling to 10x peak traffic.
Senior Backend Developer
Cashpad
Jan 2016 - Dec 2017 (1 year 11 months)
Rebuilt a failing POS system from scratch into a production-ready product used across 7+ countries. Delivered NF525 fiscal-compliant ticket chaining with PostgreSQL advisory locks and normalized third-party webhooks.
Curriculum Creator & Ruby on Rails Instructor
42, SUPDEWEB, Simplon
Jan 2015 - Dec 2017 (2 years 11 months)
Authored Rails/backend curricula and trained 100+ students in full-stack Rails, TDD, deployment, and Unix/Linux administration.
Senior Fullstack Engineer / Tech Consultant
Freelance / Independent
Jan 2014 - Dec 2017 (3 years 11 months)
Executed zero-downtime Rails migrations and reduced legacy technical debt for SMBs.
Education
Degrees, certifications, and relevant coursework
SUPDEWEB
Diploma, Web Development
Completed curriculum at SUPDEWEB, a web development school.
Simplon
Diploma, Web Development
Completed curriculum at Simplon, a coding bootcamp.
Tech stack
Software and tools used professionally
Availability
Location
FranceAuthorized to work in
Website
sballet.proPortfolio
sballet.proSalary expectations
Social media
Job categories
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