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Senior Data Scientist - Cybersecurity

Brazil🌐 Remote💼 Full-time🗓 2026-09-29

Core

Building reliable machine learning solutions for AI security, focusing on identifying risks like sensitive-data exposure, unsafe content, and adversarial inputs in LLM interactions.

Role type

Senior IC machine-learning engineer (AI security/NLP)

Builds

Production ML models and evaluation frameworks for AI security use cases

Domain

Cybersecurity + Natural Language Processing

Deliverable

production ML models

Required skills

NLP, transformer-based models, Python, PyTorch/TensorFlow, Hugging Face, scikit-learn, NER, text classification, data preparation (Pandas), model evaluation design, inference optimization

Preferred skills

AI security concepts (prompt injection, PII exposure, adversarial inputs), data privacy

Technologies

Python, PyTorch, TensorFlow, Hugging Face, scikit-learn, Pandas

Responsibilities

Build and curate high-quality datasets for NLP and AI security; Train, fine-tune, and evaluate NLP and transformer-based models; Design evaluation pipelines and benchmarks; Optimize models and inference workflows for low latency and efficiency; Collaborate with AI and engineering teams to transition research into production solutions.

Seniority

Senior, hands-on IC

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