I am an IT architect and entrepreneur passionate about technological innovation, with strong technical expertise to solve complex challenges. My background in computer engineering, specializing in payment systems and security, has enabled me to master complex system automation, artificial intelligence, and secured infrastructure optimization throughout my career. I accompany digital projects from strategy to implementation, including audit, architectural design, development, and deployment. My expertise spans mobile and fullstack development, AI agent implementation, and infrastructure security, always emphasizing performance, security, and scalability. I thrive on solving technical problems and transforming needs into effective, innovative, and sustainable solutions.

Romain Macureau

I am an IT architect and entrepreneur passionate about technological innovation, with strong technical expertise to solve complex challenges. My background in computer engineering, specializing in payment systems and security, has enabled me to master complex system automation, artificial intelligence, and secured infrastructure optimization throughout my career. I accompany digital projects from strategy to implementation, including audit, architectural design, development, and deployment. My expertise spans mobile and fullstack development, AI agent implementation, and infrastructure security, always emphasizing performance, security, and scalability. I thrive on solving technical problems and transforming needs into effective, innovative, and sustainable solutions.

Available to hire

I am an IT architect and entrepreneur passionate about technological innovation, with strong technical expertise to solve complex challenges. My background in computer engineering, specializing in payment systems and security, has enabled me to master complex system automation, artificial intelligence, and secured infrastructure optimization throughout my career. I accompany digital projects from strategy to implementation, including audit, architectural design, development, and deployment.

My expertise spans mobile and fullstack development, AI agent implementation, and infrastructure security, always emphasizing performance, security, and scalability. I thrive on solving technical problems and transforming needs into effective, innovative, and sustainable solutions.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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Work Experience

Systems Automation and Fullstack Developer at Opena
May 1, 2024 - Present
Responsible for creating and securing network and server architectures, developing specialized Retrieval-Augmented Generation (RAG) AI solutions, integrating tools into the system, and monitoring overall system performance. Utilized automation tools such as n8n and make alongside OpenAI, Anthropic, and Mistral APIs within a Debian, Docker, Redis, and Ollama environment.
Android Developer at Carrefour
May 1, 2024 - August 7, 2025
Maintained and evolved the Carrefour Android app including fixing issues, stabilizing the application, developing new features, and unit tests. Worked within a Scrum methodology using tools like Android Studio, Jira, GitLab, and Vysor. Technologies included Kotlin, Compose, and clean architecture.
Android Developer at Déjàmobile
November 1, 2022 - August 7, 2025
Maintained and evolved a bank’s dematerialized card payment application, delivering fixes and new features including widgets, automated UI test development, and recipe book monitoring and evolution. Scrum methodology with Kotlin, clean architecture and Espresso were core technologies.
Contractor Architect, Lead, C# Developer at Opena
January 1, 2022 - Present
Led development of a multiplayer and cross-platform mobile game. Conducted Unity training and multiplayer technology infrastructure training. Responsible for game design and architecture, team management, development of proof of concept (POC), testing, balancing, and crowdfunding campaign preparation.
Freelance Architect, Node.js and React Developer at Opena
April 1, 2022 - August 7, 2025
Built a real-time bid management proof of concept platform including needs analysis, technical stack selection, scalable architecture and database design. Developed multiple APIs (Authentication, Real-time, Administration, Public), web interfaces, and managed deployment and server administration with Heroku and OVH Cloud.
Contractor Architect, Developer, R&D at Opena
April 1, 2021 - Present
Developed an Android application for detecting foaling with business plan creation, API development for data collection, R&D on accelerometer data and algorithms, POC development on rooted phones, and design of support equipment.
Lead Tech Android at Datafolio
August 1, 2021 - August 7, 2025
Managed Android development team for an innovative app providing tailor-made insurance based on transport risk assessed via mobile sensors. Oversaw app architecture, coding, API communication, coordinated with iOS developer and data scientists, and led weekly progress presentations.
Architect, Developer at WareID
May 1, 2020 - August 7, 2025
Designed the IS architecture including Raspberry Pi servers, touch tablets, and communications for warehouse use. Developed Android barcode scanning proof of concept app. Provided client IT team training and developed Python scripts for forklift detection devices.
Architect, Developer at Nov@lis
April 1, 2020 - August 7, 2025
Architected and developed REST APIs using C++ with ORM for Laboratory Information Management System (LIMS). Selected appropriate ORM, developed multiple API versions, created documentation, and handled backend services under heavy load.
Architect, Developer at Select informatique
December 31, 2017 - August 7, 2025
Ported LIMS C++ backend with Angular frontend web interfaces. Developed C++ gateway, fixed bugs, and enhanced Pro*C backend services.
Android/iOS Developer at Ingenico
May 1, 2016 - August 7, 2025
Implemented a sharpness validation filter using OpenCV to improve OCR results on an existing ID capture application for both Android and iOS.
Contractor Architect, Mobile Developer at Opena
June 1, 2014 - Present
Developed cross-platform game in C++ with Cocos2d-x for iOS and Android. Handled project architecture, game development, and outsourcing of graphics and music including soundscape creation.
Contractor Architect, Mobile Developer at Opena
March 1, 2013 - Present
Developed Java puzzle game on Android with AndEngine; integrated Facebook API for community mode with level sharing; designed database, API, and server. Maintained and updated game available on Play Store.
Contractor Architect, Mobile Developer at Opena
May 1, 2012 - Present
Developed randomly generated maze game on Android and iOS using Java/AndEngine and Objective-C/Cocos2D respectively. Achieved 13 million downloads on Android version. Also ported to Windows Phone.
Freelance Architect, Mobile Developer, Webmaster at Opena
March 31, 2012 - August 7, 2025
Developed iOS and Android application for horse owners with geo-located directory, free/paid versions, credit card payment, automated invoicing, admin management, and Databases integration with Google Maps. Handled server administration.
Architect, Mobile Developer, Webmaster at Opena
March 31, 2020 - August 7, 2025
Managed audit, certificates, updates, and publication to Apple Store; developed iPad version, Android ports, Windows Phone port, email PDF profile generation; maintained Wordpress website with custom modules and ongoing updates.
Apprenticeship Contract at Orange Labs
August 31, 2010 - August 7, 2025
Conducted feasibility studies and prototyping for Orange Money service including architecture/payment system interaction. Improved software and architectural security, prototyped mobile web interface, developed Eclipse plugins, administered Debian servers, and developed bank payment tools.
Internship at Taika
June 30, 2007 - August 7, 2025
Administered and secured Debian server, implemented session and identification to secure company site, ported Linux app to MacOSX with installer creation, and developed/debugged ERP system.
Systems Automation and Fullstack Developer at Opena
May 1, 2024 - Present
Created and secured network and server architectures, developed specialized RAG (Retrieval Augmented Generation) AI solutions, integrated various AI tools into system workflows, and managed system monitoring using technologies including OpenAI, Anthropic, and Mistral APIs with tools like n8n and make on a Debian/Docker/Redis environment.
Android Developer at Carrefour
May 1, 2024 - August 7, 2025
Maintained and evolved the Carrefour Android application, including fixes, stabilization, new feature development, and unit test creation. Employed Scrum methodology and modern Android tools and technologies such as Kotlin, Compose, and clean architecture.
Android Developer at Déjàmobile
November 1, 2022 - August 7, 2025
Maintained and evolved a bank's dematerialized card payment app with fixes, enhancements, widget development, automated UI testing (Espresso), and recipe book evolution using Scrum and Kotlin technologies.
Architect, Lead, C# Developer at Opena
January 1, 2022 - Present
Led architecture and development of a multiplayer cross-platform mobile game including Unity training, multiplayer technology and infrastructure development, game design, team management, proof of concept development, and preparation for crowdfunding campaigns.
Architect, Node.js and React Developer at Opena
April 1, 2022 - August 7, 2025
Created a real-time bid management POC platform featuring database design, scalable architecture, authentication API, real-time management APIs, administration interfaces, website development, hosting on Heroku, and automation scripts for catalog and photo exports.
Architect, Developer, R&D at Opena
April 1, 2021 - Present
Developed an Android application for detecting foaling with needs analysis, business plan creation, API development, R&D on accelerometer data and algorithms, POC on rooted phones, and support equipment design.
Lead Tech Android at Datafolio
August 1, 2021 - August 7, 2025
Managed Android development team for an innovative insurance app using mobile sensors. Responsibilities included architecture, development, API integration, R&D, and coordination with iOS and data science teams in an Agile environment.
Architect, Developer at WareID
May 1, 2020 - August 7, 2025
Designed warehouse information system with Raspberry Pi servers, tablets, communications, networks, and backups. Developed Android barcode scanning POC application and trained client’s IT team. Developed python scripts for detection devices on forklifts.
Architect, Developer at Nov@lis
April 1, 2020 - August 7, 2025
Developed REST API for laboratory information management system in C++ using an ORM. Conducted market ORM studies, developed multiple API versions, documentation, back-end services, and handled high load constraints.
Architect, Developer at Select informatique
December 31, 2017 - August 7, 2025
Ported laboratory information management system in C++, developed Angular web front-end and C++ gateway back-end, fixed bugs, and enhanced Pro*C backend services.
Android/iOS Developer at Ingenico
May 1, 2016 - August 7, 2025
Added photo sharpness filter using OpenCV for existing ID capture application to improve OCR results. Conducted research and development in image processing.
Architect, Mobile Developer at Opena
June 1, 2014 - Present
Developed cross-platform game with Cocos2d-x in C++. Implemented project architecture, game development, graphics/music outsourcing management, and soundscape creation.
Architect, Mobile Developer at Opena
March 1, 2013 - Present
Developed Android Java puzzle game using AndEngine with Facebook integration, community mode for user levels, and managed database, API and server administration design.
Architect, Mobile Developer at Opena
May 1, 2012 - Present
Developed randomly generated maze game on Android and iOS with success of 13 million downloads on Android. Used technologies include Java, AndEngine, Objective-C, Cocos2D, and C#.
Architect, Mobile Developer, Webmaster at Opena
March 31, 2012 - August 7, 2025
Developed iOS and Android application for horse owners with geo-located directory, payment integration, multiple app versions, PDF profile generation, website and admin interface, and server/database design and maintenance.
Architect, Mobile Developer, Webmaster at Opena
March 31, 2020 - August 7, 2025
Managed audit, certificate and update management, published to Apple Store, developed iPad version, ported to Android and Windows Phone, developed regular maintenance and updates, and website creation with Wordpress custom module.
Apprenticeship contract at Orange Labs
August 31, 2010 - August 7, 2025
Conducted feasibility studies and prototyping for Orange Money service, strengthened software and architectural security, developed mobile web interface prototypes, Eclipse plugins, administrator tools, and handled debugging and documentation.
Internship at Taika
June 30, 2007 - August 7, 2025
Administered and secured Debian server, developed session and identification system for security, ported Linux application to MacOSX, created installation, and developed and debugged ERP software.

Education

Engineer in IT, Electronic Banking and Systems Security at ENSI CAEN
January 1, 2007 - January 1, 2010
DUT Computer Science, embedded systems option at IUT Ifs
January 1, 2005 - January 1, 2007
Scientific Baccalaureate, Mathematics Specialization at CLE, HSC
January 1, 2004 - January 1, 2005
Engineer in IT, Electronic Banking and Systems Security at ENSI CAEN
January 1, 2007 - January 1, 2010
DUT Computer Science, embedded systems option at IUT Ifs
January 1, 2005 - January 1, 2007
Scientific Baccalaureate, Mathematics Specialization at CLE, HSC
January 1, 2004 - January 1, 2005

Qualifications

Car and motorcycle licence
January 11, 2030 - August 7, 2025
Car and motorcycle licence
January 11, 2030 - August 7, 2025

Industry Experience

Computers & Electronics, Financial Services, Gaming, Healthcare, Software & Internet, Retail, Transportation & Logistics

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
See more