Abnormal AI
Senior Software Engineer - Behavioral Security Products
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Senior Software Engineer - Behavioral Security Products
Sr. Software Engineer - Account Takeover (Public summit)
At Abnormal AI, we protect our customers against nefarious adversaries who are constantly evolving their techniques and tactics to outwit and undermine the traditional approaches to security.
Abnormal is recognised 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
The team owns the infrastructure, ML models, customer-facing APIs, and internal tools that drive Abnormal’s Account Takeover (ATO) protection product—a critical solution for detecting malicious activity and safeguarding customers from account theft.
About the Role
We’re looking for a Senior Software Engineer to:
- Lead complex feature delivery and technical design for our ATO platform.
- Scale the platform to support growing product requirements.
- Own backend development, production operations, stakeholder management, and the mentorship of engineers.
The core objective: drive system reliability, reduce latency, and accelerate feature release cycles.
Key Responsibilities
Technical Delivery & Leadership
- Design, build, and iterate on scalable backend systems, APIs, frameworks, and ML-based solutions.
- Own end-to-end development of critical features to enhance customer experience and security.
- Ensure stability, reliability, and operational excellence of foundational systems.
- Write clean, testable, and robust code while considering edge cases and performance.
- Author and review technical design documents, influencing best practices across the team.
- Participate in architecture discussions and contribute to on-call rotations.
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Leadership & Collaboration
- Work closely with Product Managers, Designers, and Product Owners to align on requirements and priorities.
- Break down ambitious projects into actionable steps, driving their completion.
- Participate in long-term roadmap discussions and propose technical plans.
- Communicate effectively in an async-first environment, ensuring transparency and resolution of challenges.
- Mentor junior engineers and foster a culture of continuous learning.
Must-Have Qualifications
- 7+ years of industry experience, with proven senior-level engineering expertise.
- Deep hands-on experience with backend development using Python.
- Proven track record of designing and scaling high-availability systems and APIs.
- Extensive knowledge of relational databases and modern data storage technologies.
- Familiarity with microservices architecture (e.g., gRPC, Kafka) and caching solutions (Redis).
- Experience with AWS (S3, RDS) and cloud deployment practices.
- Expertise in Docker, Kubernetes, Helm for container orchestration.
- Strong understanding of service observability, monitoring (Prometheus, Grafana), and incident response.
- Ability to write comprehensive technical design documents and influence cross-team decisions.
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Preferred Experience
- Experience with generative AI assists and modern developer tools to streamline workflows.
- Knowledge of real-time data processing and fraud detection pipelines.
- Exposure to identity authentication systems and model-driven risk scoring.
Abnormal AI is an equal opportunity employer. All qualified candidates will be considered for employment without discrimination on the basis of race, colour, religion, sex, national origin, disability, protected veteran status, or any other characteristic protected by law. For our full EEO policy statement, please visit our resources.
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