
Benjamin ROSSIGNOL
Data Engineer
Salary / Daily rate
91120 Palaiseau, France
Freelance, open to permanent contract
Can come onsite
Skills
Languages
About me
Intro
As an EFREI Paris graduate in Data & AI , I combine data engineering expertise from my experiences at Renault and Nokia Bell Labs with a passion for software development, specifically Kotlin Multiplatform. Currently AWS and Azure certified, I am developing Dionys, a cross-platform board game application. As a dedicated Crossfit practitioner, I bring the same discipline to my technical projects as I do to my physical training. Portfolio link : https://benjaminrossignol.vercel.app/
Work experience
Software Engineer
IndépendantFreelance
Sep 2025 - Present
1 year 2 months
Remote
Currently engaged in developing cross-platform software solutions and deepening my expertise in software engineering. Portfolio: https://benjaminrossignol.vercel.app/ • Design and deployment of a personal portfolio website to showcase technical projects and expertise. Main Project: Dionys (Cross-platform board game application) • Architecture: Developed using Kotlin Multiplatform (KMP) for optimal code sharing between iOS and Android. • Software Quality: Implementation of a robust technical stack including unit testing, linters, and Continuous Integration (CI/CD). • UX/UI: Design of user-centered interfaces powered by high-performance backend logic. Training & Self-Learning: • CS50 Certification (Harvard): Consolidation of fundamental computer science concepts in algorithms and C. • HSK Preparation (Chinese): Intensive language study with a focus on international mobility. • Daily training for Hyrox competitions (Oslo on Sept 26, 2025; Toulouse on March 19, 2026), building discipline and resilience applicable to technical challenges.
Data Engineer (Stage de fin d'études)
Renault Group
Mar 2025 - Sep 2025
7 months
78280 Guyancourt, France
Within the Global Academy, I spearheaded the digital transformation of training monitoring processes across 22 factories and 9 countries. • Data Engineering: Designed and deployed a centralized data architecture to automate the ingestion and processing of data from heterogeneous sources. • Low-Code/Fullstack Development: Created data entry interfaces and dashboards using Power Apps & SQL to streamline operations for 600 trainers. • Impact Analysis: Audited and cleaned complex datasets covering 100 training programs to ensure the reliability of Key Performance Indicators (KPIs).
Data Research Analyst
Nokia Bell Labs
Nov 2023 - Apr 2024
6 months
91300 Massy, France
• Cutting-edge Visualization: Developed an interactive dashboard (Plotly Dash) for real-time monitoring of a multi-layered security architecture (IDS). • Data Engineering: Conducted analysis, cleaning, and aggregation of massive network traffic datasets (2GB+)—including Header and Payload data—for attack classification (DoS, Botnet, MITM). • ML Modeling: Integrated supervised classification models (Random Forest, SVM, VAE) and unsupervised clustering algorithms to identify unknown threats and zero-day attacks. • Optimization & Scalability: Performed a complete codebase refactor to support responsive design and drastically reduced data loading latency. • Scientific Communication: Created pedagogical interfaces to explain complex research concepts and patent-pending technologies to diverse stakeholders (researchers, clients, and investors).
Education
EFREI Paris
Engineering Degree, Computer Engineering, Major in Data & Artificial Intelligence
2020 - 2025
5 years
Activities and societies: Horizon EFREI Association (Academic Tutoring, 2020-2024) EFREI Basketball (Player, 2025)
Beijing International Chinese College (BICC) - Chinese Language School
General Chinese, Chinese Language and Literature
2024 - 2024
1 month
Grade: HSK1
Concordia University
International Mobility, Computer Science
2022 - 2022
4 months
Licenses & certifications
CS50's Introduction to Computer Science
Issued: Dec 2025
AWS Certified Cloud Practitioner
Issued: Jan 2025
Microsoft Certified: Azure AI Fundamentals
Issued: Dec 2024
TOEIC
Issued: Jul 2024
Microsoft Certified: Azure Fundamentals
Issued: May 2024
Certificat Voltaire
Issued: Jun 2023