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Abnormal AI Logo

Staff Software Engineer - Machine Learning - Message Security Detection

Abnormal AI

$229,500 - $270,000
Aug 31, 2025
Remote, US
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Abnormal AI is looking to solve the problem of protecting customers against evolving cyber threats by building a high recall Detection Engine that can operate on hundreds of millions of messages at milliseconds latency.

Requirements

  • 8+ years of experience designing and building high-impact, customer-facing machine learning applications.
  • Proven experience working on ML at scale with direct product impact in mature ML industries such as recommendation systems, ad tech, quantitative finance, or fraud detection.
  • Strong grasp of the theoretical limitations of deep learning models and a systematic approach to investigating and debugging poor model performance.
  • Demonstrated experience in the productionization of large-scale ML models in fast-feedback environments.
  • Ability to reason about abstract system gaps and propose generalizable, architecturally sound ML solutions, not just point fixes.
  • Expertise across the entire ML lifecycle, from data exploration and feature engineering to model deployment and online scoring.
  • Fluency in Python and ML frameworks like Scikit-learn, PyTorch, or TensorFlow.

Responsibilities

  • Serve as a technical leader and subject matter expert, providing architectural guidance and mentorship across multiple machine learning workstreams.
  • Architect and design generalizable ML systems to address the most critical gaps in our detection capabilities, moving beyond incremental improvements.
  • Reason holistically about our entire detection engine, defining the architectural vision for how different classes of models—from heuristic and behavioral to complex deep learning systems—should integrate and operate.
  • Drive the technical roadmap for foundational, long-term projects, such as evolving our global model training paradigms and creating centralized ML capabilities that can be leveraged as platforms by other teams.
  • Own the end-to-end ML lifecycle: from data analysis, feature engineering, and model prototyping to working with infrastructure teams on productionization, deployment, and monitoring of large-scale models.
  • Investigate complex model performance issues, applying a deep theoretical understanding of machine learning and deep learning to diagnose and resolve them.
  • Continuously adapt our systems to new, unseen attacks by developing and refining our automated model retraining and evaluation pipelines.

Other

  • BS degree in Computer Science, Applied Sciences, Information Systems, or a related engineering field.
  • MS or PhD degree in Computer Science, Electrical Engineering, or another related engineering/applied sciences field (nice to have).
  • Experience leading multi-quarter, cross-functional ML projects (nice to have).
  • Base salary range: $229,500—$270,000 USD
  • Eligible for a bonus, restricted stock units (RSUs), and benefits.