Senior Software Engineer – Behavioral Security Products

Abnormal Security

. Own complex feature delivery and technical design for the Account Takeover protection platform .

Posted 11/9/2026full-timeRemote • United KingdomSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in backend development with a strong focus on Python, large-scale system design, and operational excellence. Capable of leading complex projects, mentoring peers, and influencing engineering practices in a collaborative environment.

Highest-signal resume keywords

Backend Proficiency In PythonLarge-Scale System DesignAWS Cloud ServicesContainerization And OrchestrationTechnical Design Documentation

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

PythonLarge-Scale System DesignRelational DatabasesGRPCKafkaRedisAWSDockerKubernetesHelm

Soft Skills

MentoringCollaborationCommunicationProject LeadershipProblem-Solving

Tools & Technologies

GenAI AssistantsMonitoring ToolsIncident Response Practices

Industry Keywords

Account Takeover ProtectionOperational ExcellenceScalable ArchitecturesCustomer ExperienceTechnical Design Documents

Tech Stack

Tools & technologies

AWSCloudDockerGRPCKafkaKubernetesPythonRedis

About the role

Key responsibilities & impact

Own complex feature delivery and technical design for the Account Takeover protection platform
Evolve the platform to scale with expanding product requirements
Develop and operate infrastructure, ML models, customer-facing APIs, and internal tools
Design, build, and iterate on scalable backend and ML systems, APIs, frameworks, and internal tools
Own end-to-end delivery of complex features that impact 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 on specifications and priorities
Break complex projects into executable steps and drive them to completion
Contribute to roadmap discussions and propose long-term technical plans
Communicate updates, challenges, and solutions in an async-first environment
Mentor peers, share knowledge, and influence engineering practices across the team

Requirements

What you’ll need

7+ years of industry experience, with proven expertise as a Senior Software Engineer
Strong backend proficiency in Python, with experience designing and scaling production systems
Proven experience with large-scale system design and building resilient, scalable, fault-tolerant applications
Strong knowledge of relational databases and modern data storage technologies
Familiarity with service-to-service communication using gRPC and Kafka
Familiarity with caching using Redis
Experience with AWS cloud services, including S3 and RDS, and deployment practices
Familiarity with containerization and orchestration using Docker, Kubernetes, and Helm
Strong understanding of service health, monitoring, and incident response practices
Experience writing technical design documents and influencing adoption across teams
Ability to independently lead complex projects and grow into a technical leader
Attention to code quality, reliability, monitoring, and performance
Ability to anticipate long-term scaling needs and design resilient architectures
Comfortable influencing cross-team goals, mentoring peers, and working in a distributed environment
Proactive use of modern developer productivity tools, including GenAI assistants

Benefits

Comp & perks

AI-assisted recruiting tools are used to help prepare interview questions; hiring decisions are made by people
Pre-employment checks for successful candidates, in line with applicable legislation and company policies
Equal opportunity employment