Guillaume De Masfrand

At Atelier Pixel, I’m responsible for the entire technical side: web development (front-end & back-end), building interactive applications, educational games, custom tools, and integrations using technologies like Supabase, React, and TailwindCSS. I work closely with a partner who handles client relations, outreach, and project management. Together, we’ve delivered several tailored projects for clients in the training, event, and entertainment industries. 🛠️ Main Tasks: - Full ownership of technical architecture and implementation - Development of interactive web applications using React, TailwindCSS, and Supabase - Creation of educational games, custom quiz platforms, and real-time multiplayer experiences - Integration of third-party APIs (Spotify, Deezer, SCORM, etc.) - Performance optimisation, and mobile responsiveness - Close collaboration with the co-founder on project scoping and feasibility 💪 Strengths: - Strong front-end expertise with React and modern JS tooling (Vite, Framer Motion, etc.) - Ability to rapidly prototype and ship interactive products tailored to specific client needs - Autonomy in managing technical decisions and infrastructure - Adaptability: from educational tools to music-based experiences to gamified corporate training - Clear communication and alignment with non-technical stakeholders 🏆 Key Achievements: - Delivered a multiplayer CSR quiz game for 2000+ simultaneous users in under 2 weeks - Built a blind test music quiz app integrated with Deezer, including admin tooling and real-time gameplay - Created a modular MIDI editor and melody generator, integrating Magenta.js - Designed a responsive whiteboard app for music composition with offline sync capabilities - Developed SCORM-compliant web games used in professional training environments

-Role Founder and Product Lead, owning the full product lifecycle from initial concept and product vision to design, architecture, and implementation. -Responsibilities Led rapid prototyping and iterative product development, including UI/UX design, database modeling, and full-stack implementation of an AI-assisted music composition platform. Designed and built advanced creative tools such as a high-level MIDI editor, virtual keyboard, and composition assistance features including musical analysis, ideation, and writing support. Integrated AI-driven pattern and motif generation using machine learning models to augment the creative workflow while keeping the user in control. -Skills & Expertise Developed Deepened full-stack engineering expertise with a strong focus on performance, scalability, and maintainability. Designed and implemented an offline-first architecture, enabling seamless usage with or without network connectivity. Performed advanced React performance optimization, ensuring smooth interactions despite complex state management and real-time editing features. Gained hands-on experience integrating machine learning models (Magenta) into production-grade user interfaces. -Key Achievements Delivered a web application with a deliberately simple user experience powered by a highly capable and performant underlying architecture. Built a complementary mobile-focused tool suite extending the web application’s workflow and enabling creative continuity across devices. -Tech Stack React (Typescript, Tailwind CSS), Fast API (python), Magenta API and ML models, Supabase.

Helped various young startups to build their technical product (Website or Mobile apps). Some of the projects I worked on include: - A banking app (web and mobile) for seniors. - A mobile app to start a business, rent an office address, etc.. in France - A website to sell, buy or invest in young companies. - A website to find like-minded auto-entrepreneurs, view their skills and experience and match with them to co-found a company. - A platform to manage company's team and resources, payslips, invoice builders, quote builders, schedule, learning platform, investment wallets and much more

Personnal Project - Collaborative story writing app to read PDF and write stories with friends using a turn based gamified approach.The app included standard profile features with personnal messages and follow features. Special focus on building a creative UI for the homescreen.

Main tasks: - Integration of new screens and components into the mobile application. - Exploration of the MLKit topic for text recognition. - Development of a React Native library for OCR implementation. - Pull-request review. - Analysis of possibilities and technical specifications for the implementation of an OCR library. - Development of prototypes and test applications on Android. Strengths and Achievements: - Strengthening of mobile development skills. - Deepening of knowledge in artificial intelligence.

Main tasks: - Game design and development of a relaxation application, the "Musical Japanese Garden," involving 3D environment modeling and programming user interactions within this environment. - Project management, establishing contacts with clinicians to identify needs that could be addressed by virtual reality (VR). Submission of application ideas, presentation of research results, and in-depth discussions on avenues to explore. - Active participation in the recruitment phases of future VR application developers. - Supervision and mentoring of interns. - Opening a sound editor position to create more immersive musical environments for our applications. - Implementation of Agile methodology within the VR application development team. - Establishing contacts with French hospitals to present our solution. - Conducting a research project focused on neuronal sensors and their use to enhance our VR applications, improving their relaxing capacity. - Hospital visits accompanied by the sales team to identify clinician needs, understand the use of our technology, and gather feedback on the product. Strengths and Achievements: - Improvement of my abilities to identify and understand client needs in the medical sector. - Strengthening of my skills in supervising and managing a small team. - Significant acquisition and skill advancement in the use of Unity and the C# programming language. - Energizing exchanges within the technical team.

-Role Co-founder and early-stage CTO, responsible for the initial technical implementation of the product from scratch. -Responsibilities Contributed to defining the initial technical architecture and technology choices. Built the first version of the MVP as a full-stack developer, focusing on speed of execution and core product functionality. Worked closely with the founding team to translate early product ideas into a functional prototype. -Skills & Experience Gained First hands-on experience as a technical co-founder, gaining exposure to startup decision-making and product constraints. Learned how to rapidly design and implement an MVP within a short timeframe. Developed practical experience launching an early product using Laravel and integrating external APIs. -Key Outcomes Successfully delivered the first complete MVP of the MidStay.com platform within a limited development window. Established a functional technical foundation to support early product validation. -Tech Stack Laravel (PHP), JavaScript, APIs.