Machine Learning Engineer - Software Engineer II

Summary

Join Abnormal Security as a Machine Learning Engineer on the Message Detection - Attack Detection team, contributing to a high-recall detection engine processing hundreds of millions of messages. You will design and implement systems combining rules, models, and feature engineering to improve email detection. Responsibilities include understanding features distinguishing safe emails from attacks, identifying new features or ML model approaches, and actively monitoring and improving detection efficacy. The role involves analyzing datasets, categorizing capability gaps, and recommending improvements. You will also contribute to data pipelines and present results to customers. This position offers significant impact on the team's roadmap and requires collaboration with engineers and product teams.

Requirements

• 3+ years experience designing, building and deploying machine learning applications in one of the domains of text understanding, entity recognition, NLP experience, computer vision, recommendation systems, or search
• 1+ years of experience with writing stable and production level pipelines for model training and evaluation leading to reproducible models and metrics
• Experience with data analytics and wielding SQL+pandas+spark framework to both build data and metric generation pipelines, and answer critical questions about system efficacy or counterfactual treatments
• Ability to understand business requirements thoroughly and bias toward designing a simplest yet generalizable ML model / system that can accomplish the goal
• Uses a systematic approach to debug both data and system issues within ML / heuristics models
• Fluent with Python and machine learning toolkits like numpy, sklearn, pytorch, keras, etc
• Effective software engineering skills who can find answers quickly from code base and writes structured, readable, well tested and efficient code
• BS degree in Computer Science, Applied Sciences, Information Systems or other related engineering field

Responsibilities

• Design and implement systems that combine rules, models, feature engineering, and business and product inputs into an email detection product, with senior engineer guidance
• Understand features that distinguish safe emails from email attacks, and how our model stack enables us to catch them
• Identify and recommend new features groups or ML model approaches that can significantly improve detection efficacy for a product
• Work with infrastructure & systems engineers to productionize signals to feed into the detection system
• Writes code with testability, readability, edge cases, and errors in mind
• Train models on well-defined datasets to improve model efficacy on specialized attacks
• Actively monitor and improve FN rates and efficacy rates for our message detection product attack categories, through feature engineering, rules and ML modeling
• Analyze FN and FP datasets to categorize capability gaps and recommend short term feature and rule ideas to improve our detection efficacy
• Contribute in other areas of the stack: building and debugging data pipelines, or presenting results back to customers in our tools when the occasion arises

Preferred Qualifications

• MS degree in Computer Science, Electrical Engineering or other related engineering field
• Experience with big data, statistics and Machine Learning
• Experience with algorithms and optimization