Senior Software Engineer - Scoring

Company: Abnormal
Location: San Diego
Posted on: July 1, 2025

Job Description:

Abnormal Security is seeking a Senior Backend Software Engineer to join our Detection Team. The Detection Division is at the forefront of developing cutting-edge technology to identify and thwart sophisticated email and cloud-based attacks that were previously undetectable, contributing to a safer digital world. As a Senior Software Backend Engineer focusing on the Detections Serving Platform, you will be instrumental in scaling and optimizing our high-throughput, low-latency scoring infrastructure to ensure a fast, responsive, stable, and reliable experience for our customers . The ideal candidate will possess: • A proven track record of scaling high-throughput, low-latency model scoring infrastructure • Experience in maintaining 99.99% uptime for services handling 50k QPS • A first-principles approach to architecting scalable, customer-centric solutions • A passion for solving complex, real-world problems with pragmatic solutions • Strong ownership mentality and impact-driven outlook on efforts and growth • Ability to iterate rapidly and autonomously on novel challenges • Experience with performance engineering - in identifying and resolving bottlenecks in systems and improving the performance in an iterative way Key Responsibilities • Lead the architecture, design, and implementation of highly scalable backend services and infrastructure supporting our world-class Detection Engine • Spearhead critical projects to meet ambitious goals, such as scaling components of Detections Scoring Pipeline by 10x while maintaining or improving performance • Collaborate closely with ML Engineering teams to gather requirements, provide technical leadership, and drive execution of infrastructure improvements • Mentor and coach junior engineers through 1-on-1s, pair programming, and high-quality code and design reviews • Continuously optimize system performance, reliability, and efficiency to meet growing demand and evolving threat landscape Requirements • 5 years of professional experience as a hands-on engineer building and scaling data-intensive products • Extensive experience with real-time, online, high-throughput & low-latency distributed systems • Proven ability to maintain 99.99% uptime for services handling 20k QPS • Strong track record of cross-functional collaboration and driving complex projects to completion • Demonstrated leadership in setting and maintaining high standards for project execution and code quality • Experience in fast-paced or start-up like environment • Experience with cloud-native architectures and microservices • Experience with event-driven architecture such as Kafka, Pub/Sub, etc. Preferred Qualifications • Familiarity with ML systems/products and distributed system technologies (e.g., Python, Golang, Kafka, Redis, Docker, Kubernetes, feature serving platforms, ML training and serving infrastructures) • Hands-on experience optimizing high-throughput online systems • Familiarity with the cybersecurity industry or fraud detection and its unique challenges

Keywords: Abnormal, La Habra , Senior Software Engineer - Scoring, IT / Software / Systems , San Diego, California