Looking for a job

Thibaud Guillaume-Gentil

@thibaudgg

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Seasoned Ruby on Rails developer focused on scalable, efficient, and useful software.

Switzerland

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What I'm looking for

I seek roles focused on building scalable Rails platforms, mentoring teams, contributing to open-source, and working for community-driven, impact-oriented organizations.

I am a seasoned Ruby on Rails developer with 19+ years building and scaling complex web applications, particularly for community-driven initiatives. I focus on creating tools that make hard problems simple and adhere to Rails best practices.

I have led platform reliability and performance efforts for high-traffic systems, optimized Sidekiq workflows, and tuned Heroku and AWS deployments while mentoring engineers and shaping efficient team processes.

I am a prolific open-source contributor — creator of widely used gems and founder of CSAAdmin — and I actively teach and mentor others through courses and hands-on guidance.

Experience

Work history, roles, and key accomplishments

Lead Software Engineer

ElectricFeel AG

Feb 2014 - Aug 2025 (11 years 6 months)

Scaled Ruby on Rails applications for micromobility, processing billions of requests and optimizing Sidekiq workflows to improve reliability and performance across Heroku and AWS deployments. Mentored junior engineers and implemented Shape Up-driven team workflows.

Ruby Ruby on Rails Sidekiq Heroku AWS PostgreSQL Performance Tuning Mentoring

Current

Freelance Software Engineer

Current

Independent / Freelance

Jan 2014 - Present (11 years 8 months)

Founded and built CSAAdmin SaaS used by 30+ CSA organizations and delivered Rails courses and mentorship for MAS-RAD master's students. Developed community-focused software and instructional materials to scale adoption.

Ruby Ruby on Rails SaaS Teaching Mentoring PostgreSQL SQLite DevOps

Senior Software Engineer

Jilion SA

Jan 2009 - Feb 2014 (5 years 1 month)

Led Rails development for a SaaS HTML5 video player platform, designing scalable solutions using PostgreSQL, MongoDB, Sidekiq, and Heroku to support high-throughput media delivery.

Ruby Ruby on Rails PostgreSQL MongoDB Sidekiq Heroku Scalability Distributed Systems

Software Engineer

EPFL

Jan 2006 - Jan 2009 (3 years)

Initiated and developed a Ruby on Rails application for an EPFL Innogrant project and served as technical adviser for a European e-learning proof-of-concept using Rails.

Ruby Ruby on Rails Prototyping Web Applications PostgreSQL Proofs Of Concept