Senior/Principal Data Scientist - Security AI & ML

RADICL; Boulder (CO); Hybrid; USD 160,000 - 235,000; Full time

Job summary

RADICL is seeking a Senior or Principal Data Scientist to improve AI/ML for security in our AI-powered CSaaS platform. You will write code, run experiments, and ship models in a hands-on, production-focused role.

As an early member of the team, you will collaborate with experienced founders, work with the latest AI and security technologies, and influence platform direction while delivering measurable impact on threat detection, triage speed, and safety of our own AI systems.

Qualifications

• 6+ years in data science or applied ML for Senior, 8+ for Principal, with models you shipped and maintained in production.
• Strong Python and SQL, and large-scale data processing on a major cloud platform.
• Experience evaluating and improving LLM or agent systems in production.
• Hands-on experience adapting or training models for a specialized domain.
• Anomaly detection or classification with rare events and noisy labels.
• Solid statistics and experimental design, and the judgment to ship a simple baseline when it's good enough.
• Comfort in an engineering team: reading production code, writing tests, and writing clear RFCs.
• Principal: you've owned ML problems end to end and can defend architecture decisions for the ML stack.

Responsibilities

• Evaluate our agents. Define how we know our AI is right, measure it against analyst verdicts, and gate every change on the results.
• Make our AI better. Improve the quality, speed, and cost of our triage, investigation, and search agents.
• Adapt models to security. Decide when to customize or train models on our analyst-labeled data, and do it.
• Detect behavior, not signatures. Build models that catch threats rules miss across endpoint, identity, email, cloud and SaaS audit, network, and vulnerability data.
• Protect our own AI. Keep attacker-controlled data from manipulating our agents.
• Prove it in production. Show whether AI is helping, using measures like time to triage, analyst override rate, and false-positive load.
• Run it like software. Own versioning, monitoring, and strict per-customer data isolation, with outputs traceable enough for CMMC audits. Your skillset/experience should include:

Skills

Python & SQL

LLM in production

Model training

Anomaly detection

Statistical design

Code & tests

End-to-end ML ownership

Job description

RADICL is seeking a Senior or Principal Data Scientist to improve AI/ML for security in our AI-powered CSaaS platform. You will write code, run experiments, and ship models in a hands-on, production-focused role.

As an early member of the team, you will collaborate with experienced founders, work with the latest AI and security technologies, and influence platform direction while delivering measurable impact on threat detection, triage speed, and safety of our own AI systems.