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Zscaler

Senior Staff Machine Learning Engineer

Zscaler

. Develop solutions for high-fidelity risk identification in customer data .

Posted 9/30/2026full-timeRemote • California • United StatesSenior💰 $157,500 - $225,000 per yearWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in developing LLM-powered agents and production-quality systems, with a strong focus on risk identification, data analytics, and CI/CD practices. Proven ability to collaborate with cross-functional teams and lead complex engineering projects in a high-stakes environment.

Highest-signal resume keywords
LLM-Powered Agent DevelopmentPython Development (8+ Years)SQL and Data Analytics LibrariesCI/CD and Cloud Infrastructure (AWS)Cyber Threat Research and Detection Engineering

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
PythonSQLData Analytics (Pandas, Polars, NumPy)LLM DevelopmentBacktestingData Pipeline DevelopmentQuality ControlIncident DebuggingModel SelectionData Quality Validation
Soft Skills
CollaborationLeadershipProblem-Solving
Tools & Technologies
LangGraphLangChainOpenSearch/ElasticsearchAthena/PrestoCI/CD Frameworks
Industry Keywords
Risk AnalysisThreat ModelingFraud DetectionAdversary ProfilingData-Driven Risk Analysis

Tech Stack

Tools & technologies
AWSCloudDistributed SystemsElasticSearchNumpyPandasPythonSQL

About the role

Key responsibilities & impact
  • Develop solutions for high-fidelity risk identification in customer data
  • Translate risk identification methods into agent logic
  • Ensure quality across risk analysis, explanations, and recommendations
  • Collaborate with threat-research teams to understand data, threats, and security heuristics
  • Identify and solve data requirements for analysis
  • Develop and collaborate on data pipelines, enrichments, and aggregations with data engineering teams
  • Apply backtesting, precision/recall balancing, tuning, and quality control to threat detection
  • Deploy and monitor solutions in production within the CI/CD framework
  • Report to the Manager AI Platform and Data Science in the AI Platform and Data Science department

Requirements

What you’ll need
  • Experience building LLM-powered agents in production, including tool and function calling, prompt and context engineering, multi-step orchestration frameworks (LangGraph, LangChain, or equivalent), and evaluation of non-deterministic output against ground truth
  • 8+ years of professional Python development
  • Ability to design and maintain production-quality systems with validated inputs, data contracts, comprehensive unit tests, and integration tests
  • Hands-on expertise with SQL and Python data analytics libraries such as pandas, Polars, and NumPy
  • Production reliability experience with CI/CD, containerization, structured logging and metrics, observability and alerting, on-call participation, incident debugging in live distributed systems, and cloud/infrastructure-as-code in AWS
  • Sr. Staff level ownership and leadership of emergent requirements, architecture, and complex engineering projects
  • Preferred: production AI or ML systems experience balancing cost, latency, and accuracy, including model selection, routing, and regression testing
  • Preferred: cyber threat research, threat modeling, threat hunting, detection engineering, data-driven risk analysis, fraud detection, adversary profiling and targeting, actuarial risk, or collaboration with risk analysis teams
  • Preferred: data engineering experience with large-volume event-data pipelines, SQL, OpenSearch/Elasticsearch, Athena/Presto, schema evolution, backfills, and data quality validation

Benefits

Comp & perks
  • Various health plans
  • Time off plans for vacation and sick time
  • Parental leave options
  • Retirement options
  • Education reimbursement
  • In-office perks
  • Inclusive benefits for employees and their families
  • Reasonable support/accommodations in the recruiting process