Senior Python Engineer – Threat Hunter

Role description

Senior Python Engineer – Threat Hunter

Paris, France (Hybrid) Fixed‑Term Employment Contract – 12 Months (Full‑Time)

CyberProof (a UST company) is seeking a Senior Python Engineer with threat hunting experience to join our managed security services team. This role is primarily engineering‑focused, with responsibility for building and maintaining Python‑based automation and analytical frameworks that support proactive threat hunting and security investigations.

The successful candidate will have strong software development experience, complemented by hands‑on exposure to threat hunting or cybersecurity investigations, particularly in enterprise and cloud environments.

Key Responsibilities

• Design, develop, and maintain Python‑based tools and automation frameworks to support threat hunting and security investigations
• Build and standardise Jupyter Notebook–based hunting workflows, including data enrichment, validation, automation, and reporting
• Develop reusable Python libraries, modules, APIs, and command‑line tools to enable scalable hunt execution
• Engineer data pipelines to ingest, transform, and analyse large volumes of security telemetry
• Perform hypothesis‑driven threat hunting and targeted investigations across endpoint, network, identity, and cloud data
• Orchestrate and schedule automated hunting workflows using pipeline or orchestration platforms
• Collaborate with Threat Intelligence and Detection Engineering teams to translate hunting outcomes into operational detections
• Document methodologies, findings, and recommendations in clear, structured technical reports

Required Experience and Skills:

Python / Software Engineering:

• Strong experience as a Python developer or software engineer, with a focus on automation, tooling, or data processing
• Proven ability to write production‑quality Python code following standard engineering best practices
• Experience working with structured data formats such as JSON, CSV, and Parquet
• Familiarity with Python data and analytics libraries (e.g., Pandas, NumPy)
• Experience with version control systems (Git) and standard development workflows

Threat Hunting / Security:

• Hands‑on experience supporting threat hunting, security investigations, or detection engineering activities
• Working knowledge of adversary techniques and the ability to apply frameworks such as MITRE ATT&CK
• Experience analysing security telemetry from endpoint, network, and cloud environments
• Exposure to hunting or investigation activities in Azure, AWS, or GCP environments

Desirable Skills:

• Experience integrating with security platforms such as Microsoft Sentinel/Defender, Cybereason, or CrowdStrike
• Experience with notebook automation, templating, or report generation
• Familiarity with CI/CD pipelines and DevOps practices
• Relevant security certifications (GIAC, OSCP, CEH, or equivalent)

Hurry & Apply for a more detailed conversation!

#UST

About UST

UST is a global digital transformation solutions provider. For more than 20 years, UST has worked side by side with the world’s best companies to make a real impact through transformation. Powered by technology, inspired by people and led by purpose, UST partners with their clients from design to operation. With deep domain expertise and a future-proof philosophy, UST embeds innovation and agility into their clients’ organizations. With over 30,000 employees in 30 countries, UST builds for boundless impact—touching billions of lives in the process.