
Arnaud Marcel
Chief Technology Officer
Salary / Daily rate
Paris, France
Freelance, open to permanent contract
Can come onsite
Skills
Languages
About me
Intro
Results-driven CTO with 15+ years of experience scaling tech teams and transforming product delivery. At Lemon Learning, I reduced time-to-market by 40% and achieved 100% team retention while developing innovative AI solutions. My expertise spans agile transformation, healthcare IT, and technical leadership—whether you're looking to accelerate development, improve software quality, or build high-performing teams, I deliver measurable impact that drives business success.
Work experience
Founder & CTPO
PepitozFreelance
Mar 2025 - Present
1 year 8 months
Paris, France
✸ Conception et développement du MVP d’une application basée sur l’IA. ✸ Objectif : réinventer le recrutement via une meilleure sélection et un engagement candidat renforcé ✸ Focus sur la qualité de l’algorithme, l’UX et les indicateurs d’impact RH
Chief Technology Officer
Lemon Learning
Jun 2023 - Present
3 years 5 months
Paris, France
✸ Managed a tech team (10 people) and a product team (2 people) in a scaling environment. ✸ Improved time-to-market by 40% by implementing agile processes and ensuring smoother delivery. ✸ Reduced the resolution time for critical bugs from several weeks to just a few days through improved quality and prioritized fixes. ✸ Achieved 100% team retention through close, hands-on management and a culture of continuous improvement. ✸ Developed an artificial intelligence (AI) module, enhancing the product's appeal and evolution.
Shareholder & Assessor
Time for the Planet
Apr 2022 - Present
4 years 7 months
Paris, France
Interim Chief Technology & Product Officer
ArquosFreelance
Jan 2023 - Jul 2023
7 months
Paris, France
✸ Led the complete development of the MVP while driving the tech and product strategy ✸ Implemented agile processes to accelerate time-to-market ✸ Prepared for the transition to a permanent CTPO
Chief Technology Officer
CTMA - Clinical Trials Mobile Application
Jun 2021 - Jul 2023
2 years 2 months
Paris, France
✸ Member of the leadership team at a startup with 20 employees ✸ Managed a Tech & Data team (7 people) based in France and Brazil ✸ Defined the strategic roadmap and product vision with the CEO/COO, aligning business and technology ✸ Implemented agile practices at scale, reducing time-to-market by 30% ✸ Key projects: overhauled the technology stack (increasing reliability by 40%), mobile and web development, and a data mining application ✸ Ensured technological governance (GDPR, HDS) through internal and external security audits ✸ Participated in an acquisition process by Telemedicine Technologies, adding value to the solution
Capsule Technologies
Sep 2010 - Jul 2021
10 years 11 months
On-site
Head Of Software
Jan 2020 - Jul 2021
1 year 7 months
On-site
Scale-Up (30 to +300 Employees) ✸ Supervised approximately 50 employees (including 4 Senior Engineering Managers) across multiple development, QA, and DevOps teams. ✸ Led intensive recruitment and onboarding initiatives to support growth (integrated over 15 employees within 12 months). ✸ Implemented large-scale agile practices (ISO 62304 compliance in a medical environment). ✸ Managed key structural projects: →🔸 Transformed OnPrem applications into PaaS, reducing infrastructure costs and simplifying deployments. →🔸 Migrated to a microservices architecture, enhancing resilience and scalability. ✸ Co-developed the product roadmap with Product Managers and the Architecture team, ensuring optimal business-tech alignment.
Head Of Software Quality / Senior Engineering Manager
Dec 2017 - Jan 2020
2 years 2 months
On-site
✸ Managed a team of approximately 20 employees covering QA, automation, and technical support. ✸ Created a Career Path for the Software department, increasing retention by 15% within a year. ✸ Implemented Git, CI/CD, nightly builds, and Sonar analysis, reducing production bugs by 40% and improving release stability. ✸ Established KPIs (via PowerBI) to track velocity, test coverage rate, and code quality. pendant quelques secondes ✸ Managed approximately 20 team members across QA, automation, and technical support. ✸ Created a Career Path for the Software department, increasing retention by 15% in one year. ✸ Introduced Git, CI/CD, nightly builds, and Sonar analysis, reducing production bugs by 40% and improving release stability. ✸ Implemented KPIs (using PowerBI) to track velocity, test coverage, and code quality.
Software Engineer Manager
Dec 2014 - Dec 2017
3 years 1 month
On-site
✸ QA Team Management: Managed a team of 15 QA professionals. ✸ Product Collaboration: Worked closely with Project Managers, Product Owners, Architects, Developers, and Testers to ensure product quality. ✸ Automation & Tools: Implemented test automation using Ranorex and developed a Jenkins/BDD/Specflow framework. ✸ Innovation & Quality: Launched pioneering initiatives to introduce innovative solutions and enhance software quality. ✸ QA Leadership: Led and developed the QA team, driven by a passion for technology and automation.
Lead Software Test Engineer
Dec 2012 - Dec 2014
2 years 1 month
On-site
✸ Team Leadership: Led a team of approximately 10 individuals under the guidance of the Software Director. ✸ Software Project Management: Managed software verification projects using agile methodologies. ✸ Quality Improvement: Focused on optimizing product quality and increasing test coverage. ✸ Test Automation: Implemented automation using Microsoft Test Management (TFS) to boost productivity.
Verification & Validation Engineer
Sep 2010 - Dec 2012
2 years 4 months
On-site
✸ Update Validation: Oversaw QA for key product updates in coordination with the QA Manager. ✸ Qualification & Scripting: Investigated customer issues and developed automated scripts (batch, VBScript, Python, Excel). ✸ Testing & Configuration: Defined test campaigns and set up the testing infrastructure (network, machines). ✸ Technical Expertise: Specialized in areas such as HL7, SQL, XP/7 Embedded OS, and WiFi.
Incka by Astek
Sep 2008 - Aug 2010
2 years
Paris, France
QA Engineer
Dec 2009 - Aug 2010
9 months
Paris, France
✸ Global Validation: Oversaw comprehensive validation of the Morpho project developments, including the integration of advanced biometrics (iris, palm, face). ✸ Cross-Department Collaboration: Worked closely with various teams to optimize biometric recognition, covering image encoding (fingerprints, iris, face, palm) and authentication. ✸ Data Research: Made significant contributions to the research and analysis of biometric databases.
QA Engineer
Aug 2009 - Dec 2009
5 months
Paris, France
✸ Specifications Validation: Validated the thrust control software for the FADEC of the SaM146 turbofan. ✸ Traceability Control: Ensured the completeness of system requirements (both high-level (HLR) and low-level (LLR)) and verified the code. ✸ Requirements Inspection: Reviewed the requirements and Simulink diagrams. ✸ Impact Analysis: Evaluated modifications and potential impacts. ✸ Defect Correction: Identified and corrected anomalies. ✸ Corrections Control: Verified the effective implementation of the corrections.
QA Engineer
Jan 2009 - Jul 2009
7 months
Paris, France
✸ Systems Requirements Validation: Specialized in validating software requirements for the inertial measurement unit of the A400M. ✸ Module Validation: Reviewed high-level requirements (HLR) in accordance with DO-178B Level A standards, including adequacy, coverage, testability, and feasibility. ✸ Functional Modules: → Inertial Data Acquisition and Processing: Ensured the collection and processing of inertial data. → GPS Data Retrieval: Integrated and processed GPS information. → Optimization via Kalman Filter: Fused inertial and GPS data for enhanced accuracy.
Software Development Engineer
Sep 2008 - Jan 2009
5 months
Paris, France
✸ Software Design: Designed the engine control software (CSAS) for the SaM146, developed using Matlab-Simulink, and created and updated libraries. pendant quelques secondes ✸ Engine Regulation Software Design: Designed the control software for the SaM146 engine (CSAS) using Matlab-Simulink, including the creation and updating of libraries.
Intern
Thales
Apr 2007 - Oct 2007
7 months
Nice, France
✸ Diver-Ship Communication System: Developed a system enabling communication between a diver and a surface vessel. ✸ Data Transmission Modem: Designed a modem to transmit data that is easily readable on a diver’s display. ✸ Diver Localization System: Implemented a localization system using 2D triangulation (three buoys) combined with a pressure sensor for 3D positioning. ✸ Technical Documentation: Authored technical documents, including specifications and requirement sheets. ✸ HMI Module: Created a human-machine interface for interacting with various system components. ✸ Localization Signal Management: Developed a system for managing localization signals effectively. ✸ Design and Concept: Engineered a new board design with a strong focus on button waterproofing.
Education
ESME, école d'ingénieurs généraliste
Master's degree in Engineering
2004 - 2008
4 years 1 month
Eucalyptus Nice
Scientific University-level
2002 - 2004
2 years 1 month
Licenses & certifications
ISTQB® Certified Tester, Advanced Level – Technical Test Analyst
Issued: Sep 2016
Certified Tester Foundation Level
Issued: Aug 2012