Senior Backend Engineer - AI-Driven Security & ATO

United States Digital Space LLC; United States; Remote; USD 150,000 - 210,000; Full time

Job summary

Abnormal AI is seeking a Senior Software Engineer to own complex feature delivery and technical design for our Account Takeover protection platform. You will scale backend systems, build ML-enabled APIs, and drive reliability, latency improvements, and rapid feature releases.

In this role, you will mentor teammates, participate in reviews, and collaborate with product managers and designers in a distributed, async-first environment.

Qualifications

• 7+ years of industry experience, senior engineer level.
• Strong backend proficiency in Python and production systems.
• Experience with large scale system design and fault-tolerant apps.
• Relational databases and modern data storage technologies.
• Familiarity with service-to-service communication (gRPC) and caching (Redis).
• Experience with AWS services (S3, RDS) and deployment practices.
• Containerization/orchestration (Docker, Kubernetes, Helm).
• Strong monitoring, incident response, and reliability practices.
• Experience writing technical design documents and influencing adoption across teams.

Responsibilities

• Design, build, and iterate on scalable backend and ML systems, APIs, frameworks, and internal tools.
• Own end-to-end delivery of complex features impacting customer experience.
• Ensure stability, reliability, and operational excellence of critical systems.
• Write clean, testable, resilient code with attention to edge cases and performance.
• Write and review technical design documents and influence adoption across the team.
• Participate in code and design reviews, and contribute to on-call rotations.
• Collaborate with product managers, designers, and engineers to align on specifications and priorities.
• Break down complex projects into executable steps and drive them to completion.
• Mentor peers, share knowledge, and influence engineering practices.

Skills

Python backend

Large-scale design

Relational DBs

gRPC

Kafka

Redis

AWS

Monitoring

Incident response

Technical design docs

Distributed systems teamwork

Tools

Docker

Kubernetes

Helm

Job description

Abnormal AI is seeking a Senior Software Engineer to own complex feature delivery and technical design for our Account Takeover protection platform. You will scale backend systems, build ML-enabled APIs, and drive reliability, latency improvements, and rapid feature releases.

In this role, you will mentor teammates, participate in reviews, and collaborate with product managers and designers in a distributed, async-first environment.