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Sourav RaiSR

Sourav Rai

AI Engineer

€150/day
Paris, FR
3-7 years

Average response time: 1 hour

About Sourav

AI/NLP engineer, 4+ years shipping ML systems from prototype to production. I lead R&D at a cybersecurity scale-up, designing and deploying LLM and deep learning pipelines end to end.
Strong in Python and PyTorch. Recent work: LLM applications (OpenAI API, LangChain, RAG, LoRA/PEFT), transformer architectures for time-series, and generative models for synthetic data — published at IEEE and IFIP conferences.
I deliver LLM pipelines, custom deep learning models, anomaly detection, time-series forecasting, and data extraction infrastructure. I do the research and ship the system. Let's talk.

Papers
CRAFT — Cross-Modal Anomaly Detection (IFIP SEC 2026): First-author work pairing temporal and textual branches to detect anomalies in cybersecurity telemetry; strong F1 across three industrial benchmarks.


Channel-Aware Embeddings for Time-Series Transformers (IEEE ICTAI 2025): First-author work cutting transformer parameters 83% with no accuracy loss in multivariate forecasting.

Ransomware detection: AI-driven detection of ransomware from system behavior telemetry, using deep learning and synthetic data generation.
  • French

    Conversational

  • English

    Native or bilingual

  • Hindi

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • SitInCloud
    Head of R&D / AI Engineer (CIFRE PhD)
    January 2024 - Today (2 years and 6 months)
    Paris, France
    • • Cybersecurity scale-up — OwlyShield (ransomware detection), OwlyScan (darknet search)
    • • Lead R&D on AI for cybersecurity products; own model design, training, and integration with production systems.
    • • Shipped LLM-based teaser generation pipeline (OpenAI API, LangChain) for personalized marketing content, deployed in production.
    • • Built scalable web crawling infrastructure (Python, Playwright, BeautifulSoup) for darknet data extraction.
    • • Designed channel-aware embedding strategies for transformer-based multivariate time series forecasting —
    83% parameter reduction with no loss in accuracy (IEEE ICTAI 2025). • • Developed cross-modal anomaly detection framework (CRAFT) for cybersecurity telemetry; accepted SEC 2026. • • Built generative pipelines (GPT-2, RQ-VAE + autoregressive transformers) for synthetic tabular and time series data, improving downstream malware detector training.
    Python Pytorch Machine learning Deep Learning Cybersecurity
  • SitInCloud & ESILV
    Research Intern
    April 2023 - October 2023 (6 months)
    • • Implemented deep learning models (autoencoders) for ransomware detection from system I/O telemetry; integrated into OwlyShield product pipeline.
    • • Built malware classification models on system behavior features; co-authored two papers (CRISIS 2024).
  • IRIF (CNRS & Université Paris Cité)
    Research Intern
    April 2022 - August 2022 (4 months)
    • • Developed pruning optimizer for deep networks (ResNet, WideResNet) on CIFAR / ImageNet, combined with adversarial training. Supervisor: Dr. Adrian Vladu.

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Education

  • PhD, Time Series and LLMs
    De Vinci Research Center
  • MSc, Data Science and AI
    Université Côte d'Azur
    2023
    Optimization, ML, DL , Statistics

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