Available to hire
I’m Sébastien Gruhier, a Senior Flutter Team Lead focused on mobile and web development, AI integration, and cross‑platform architecture. I bring over 30 years of technical leadership and hands‑on development experience, with a strong track record in scalable software architecture, agile delivery, and international team management.
Beyond delivering robust apps, I contribute to open‑source, mentor engineers, and help teams adopt modern tooling and CI/CD practices. I enjoy working across Europe and globally, guiding projects from concept to production while exploring emerging technologies and developer communities. Recent open‑source contributions include smart_overlay_menu and awesome_emoji_picker.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Language
French
Fluent
English
Fluent
Work Experience
Lead Developer at Dragonfly
January 1, 2025 - PresentLead cross‑platform Bluesky client development (Mac/iOS/Android) with full‑stack implementation, Supabase backend integration, and UI/UX collaboration with Odubu Design.
Mobile Game Developer at Odubu Games
August 1, 2022 - PresentDesign and development of cross‑platform mobile games in Flutter (My Tiny Room, Mini Memo, Cozy Sudoku, Sudok‑Hue) with focus on gameplay feel and performance.
Flutter Trainer at AlgoSup
June 1, 2024 - October 17, 2025Development of educational programs, project supervision and skills assessment; training and hands‑on workshops for 50 Computer Science students.
Trainer & Speaker at Skills Matter
January 1, 2010 - October 17, 2025Trainer & speaker delivering workshops and sessions on Ajax & Ruby on Rails and related web technologies in the United Kingdom.
Speaker at Paris on Rails
June 1, 2006 - October 17, 2025Lectures about using Ajax with Ruby on Rails for the Paris on Rails event.
Co-founder & CTO at Habillage
July 1, 2005 - October 17, 2025Co-founder and CTO of a web design company for small towns; responsible for technical strategy and project delivery.
Software Engineer & Project Manager at ISTARS
December 1, 2003 - October 17, 2025Software development and team management; progressed to managerial responsibilities.
Software Engineer at INAS
April 1, 1998 - October 17, 2025Development of animated drawing software in C++ on Silicon Graphics systems.
Lead Developer at Dragonfly
January 1, 2025 - PresentCross-platform Bluesky client development (Mac/iOS/Android) with full-stack implementation, Supabase backend integration, and UI/UX collaboration with Odubu Design.
Mobile Game Developer at Odubu Games
August 1, 2022 - PresentDesign and development of cross-platform mobile games in Flutter (My Tiny Room, Mini Memo, Cozy Sudoku, Sudok-Hue).
Flutter Trainer at AlgoSup
June 30, 2024 - October 17, 2025Development of educational programs, project supervision and skills assessment. Training and hands-on workshops for 50 Computer Science students.
Tech Lead at Gradient Cyber
December 31, 2021 - October 17, 2025Full Angular and ElasticSearch web application development; cross-platform Flutter mobile app; tech lead of an international team of 5 developers; architecture design and internal API integration.
Tech Lead & Senior Flutter Developer at Bloxley
December 31, 2023 - October 17, 2025Architecture and development of a Flutter mobile banking application from scratch; integration of financial services and banking APIs; successful launch on Google Play and App Store; management of a development team.
Founder at Xilinus
April 1, 2008 - PresentDevelopment of mobile, web and desktop Flutter applications; strategic and technical direction of the company; innovation in emerging technologies.
Co-founder & CTO at Habillage
July 31, 2005 - October 17, 2025Co-founder of a web design company for small towns; technical and strategic management.
Software Engineer & Project Manager at ISTARS
December 31, 2003 - October 17, 2025Software development and team management; progression to managerial responsibilities.
Software Engineer at INASoftware
April 1, 1998 - October 17, 2025Development of animated drawing software in C++ on Silicon Graphics.
Founder at Xilinus
April 1, 2008 - PresentDevelopment of mobile, web and desktop Flutter applications; Strategic and technical direction of the company; Innovation in emerging technologies
Tech Lead Flutter at Capifrance and Optim Home
April 1, 2025 - PresentArchitecture and development of mobile and web Flutter applications; Clean Architecture implementation with Cubit pattern for state management; CI/CD pipeline configuration and optimization; Agile sprint planning and code reviews
Tech Lead & Senior Flutter Developer at Bloxley
December 31, 2023 - October 17, 2025Architecture and development of a Flutter mobile banking application from scratch; Launch on Google Play and App Store US; Management of development team; Integration of financial services and banking APIs; Performance optimization
Tech Lead at Gradient Cyber
December 31, 2021 - October 17, 2025Full Angular and ElasticSearch web application development; Cross‑platform Flutter mobile development; Tech lead of an international team; Architecture design and internal API integration
Software Developer / Consultant at Various Clients
December 31, 2016 - October 17, 2025Ruby on Rails and JavaScript development for various international clients; project-based consulting and web application delivery
Freelance Ruby on Rails Expert Consultant at Self-Employed
June 30, 2008 - October 17, 2025Ruby on Rails technical expertise, consulting and web application development
Software Engineer at INASoftware
April 30, 1998 - October 17, 2025Software development
Software Engineer & Project Manager at ISTARS
December 31, 2003 - October 17, 2025Software development and team management
Co-founder & CTO at Habillage
July 31, 2005 - October 17, 2025Co-founder of a web design company for small towns; technical and strategic management
Lead Developer at Dragonfly
January 1, 2025 - PresentCross-platform Bluesky client development; full-stack implementation with Supabase backend; UI/UX collaboration with Odubu Design
Mobile Game Developer at Odubu Games
August 1, 2022 - PresentDesign and development of cross-platform mobile games in Flutter (My Tiny Room, Mini Memo, Cozy Sudoku, Sudoku Hue)
Education
Master of Science in Computer Science at Ecole Supérieure en Sciences Informatiques, Sophia-Antipolis, France
January 11, 2030 - January 1, 1993Master of Science in Computer Science at Ecole Superieure en Sciences Informatiques, Sophia-Antipolis, France
January 11, 2030 - January 1, 1993Qualifications
Ruby on Rails Expert Consultant
January 1, 2006 - June 30, 2008Industry Experience
Software & Internet, Professional Services, Media & Entertainment, Education
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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