• Improve our existing Ads Recommendation systems using your expertise • Identify new opportunities to apply Machine Learning to different parts of the Quora Ads Product • Work with other engineers to implement algorithms and systems in an efficient way • Take end-to-end ownership of Machine Learning systems -- from data pipelines and training, to real-time prediction engine

• Drive the evolution of the Machine Learning platform and ensure the quality of models • Critically evaluate internal tools and provide recommendations for improvements • Maintain ML model observability, proposing monitoring metrics

This description is a summary of our understanding of the job description. Click on 'Apply' button to find out more. Role Description Abnormal AI is looking for a Machine Learning Engineer to join the Message Detection - Attack Detection team. At Abnormal, we protect our customers against nefarious adversaries who are constantly evolving their techniques and tactics to outwit and undermine the traditional approaches to Security. The Attack Detection team plays the central role of building an extremely high recall Detection Engine that can operate on hundreds of millions of messages at milliseconds latency. The team’s mission statement is to provide world-class detector efficacy to tackle the changing attack landscape using a combination of generalizable and auto-trained models as well as specific detectors for high-value attack categories. - 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. - Write 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. Qualifications - 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 and tensorflow. - 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. Requirements - MS degree in Computer Science, Electrical Engineering or other related engineering field (Nice to Have). - Experience with big data, statistics and Machine Learning (Nice to Have). - Experience with algorithms and optimization (Nice to Have). Benefits - This position is not focused on optimizing existing machine learning models. - This is not a research-oriented role that's two-steps removed from the product or customer. - This is not a statistics/data science meets ML role.

• Shape the future of AI-powered search across all OLX verticals. You’ll drive the technical vision, guide a multidisciplinary team, and ensure our Search AI Platform becomes a foundation for scalable, intelligent discovery experiences for millions of users. • Lead the design and evolution of OLX’s Search AI Platform, developing LLM- and GenAI-based systems that power discovery and relevance across Motors, Real Estate, Jobs, and Goods. • Partner with the Principal Search Engineer to define and implement a unified technical strategy for search, ranking, and retrieval at scale. • Guide a cross-functional team of ML engineers, data scientists, and platform engineers, fostering technical excellence, experimentation, and rapid iteration. • Prototype, evaluate, and productionize new ML models, including embedding-based retrieval, personalization, and relevance optimization. • Collaborate with product and analytics teams to define success metrics, integrate with A/B testing pipelines, and measure real customer impact. • Mentor and inspire data scientists and ML engineers across OLX’s global hubs, sharing best practices and shaping the future of applied ML at scale. • Stay hands-on, driving implementation in Python and AWS while exploring state-of-the-art advances in LLMs, GenAI, and search infrastructure. • Promote a culture of learning and innovation, helping the team iterate fast, fail fast, and learn continuously.