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Software Engineer - Backend - Behavioral Security Products

Abnormal Security

Remote · United KingdomSalary not disclosedfull-timeAbnormal Security Careers

Abnormal is recognized as a top cybersecurity startup (Leader in the 2025 Gartner Magic Quadrant for Email Security Platforms), securing a Series D funding of $250 million at a $5.1 billion valuation in August 2024. About The Team This team owns the end-to-end development and operation of the infrastructure, ML models, AI agents, customer-facing APIs, and internal tools that power Abnormal's Identity Threat Protection (ITP) product.

Responsibilities

  • Technical Delivery & Excellence
  • Design, build, and iterate on scalable backend and ML systems, APIs, frameworks, and internal tools.
  • Take ownership of well-scoped features and components, with guidance from senior engineers on more complex, cross-system work.
  • Contribute to the stability, reliability, and operational excellence of critical systems.
  • Write clean, testable, and resilient code with attention to edge cases and performance.
  • Contribute to technical design documents and participate in design discussions.
  • Participate in code and design reviews, and contribute to on-call rotations.
  • AI Engineering & Agents
  • Help design and build LLM-powered features and agentic workflows (e.g., automated investigation, triage, or remediation assistants) as part of the ATO platform.
  • Integrate LLM APIs and agent frameworks into backend services, with attention to reliability, cost, latency, and evaluation.

Languages

    Work format
    Remote
    Seniority
    Mid
    Posted
    16 Sept 2026
    Last verified
    In the last 5 days

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