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Senior Software Engineer In Test

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Axon

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Location:
United Kingdom , London

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Salary:

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Job Description:

Axon is on a mission to protect life. As part of that mission, Axon Assistant is redefining how public safety professionals interact with intelligent systems — delivering real-time translation, contextual policy guidance, and AI-powered support across voice, mobile, and web platforms. From body-worn cameras to mobile apps and dispatch tools, Axon Assistant enables first responders to access critical information exactly when they need it. As a Senior SDET, you’ll play a pivotal role in ensuring this mission-critical, intelligent software ships with the highest levels of quality, performance, and trust. You’ll architect test infrastructure, lead automation strategy, and own the systems that validate our most advanced multi-platform experiences.

Job Responsibility:

  • Architect and implement automation frameworks, test strategies, and quality infrastructure across web, mobile, and on-device platforms
  • Design scalable validation systems for real-time voice interaction, AI/LLM-driven features, and distributed cloud services
  • Partner with engineers to shape code for testability and embed quality early in the development process
  • Lead cross-functional quality initiatives to improve CI/CD pipelines, observability, and release readiness
  • Drive performance, load, and resilience testing, especially for latency-sensitive, real-time systems
  • Mentor other SDETs and developers in automation strategy, debugging, and risk mitigation
  • Own root cause analysis for complex, system-level issues — using telemetry, tracing, and logs
  • Contribute to documentation of tools, architecture, and best practices that scale across teams

Requirements:

  • 7+ years of experience in test automation, software engineering, or SDET roles
  • Advanced proficiency in Python, Java, C#, JavaScript, or Go
  • Strong experience building and scaling test automation frameworks and developer-focused tools
  • Deep understanding of distributed systems, API testing, and CI/CD pipelines
  • Hands-on experience testing AI/ML-powered systems, real-time services, or multi-modal UIs
  • Track record of owning quality strategy and delivery for mission-critical software in production

Nice to have:

  • Background working in regulated or high-trust domains like public safety, healthcare, or finance
  • Ability to influence technical direction and raise the bar for engineering quality across teams
What we offer:
  • Competitive base salary and RSUs
  • Comprehensive pension plan with matching contribution
  • Private health insurance & cash plans
  • 30 days paid holiday + UK public holidays
  • Enhanced maternity/paternity leave
  • GymPass subscription
  • Life assurance & income protection
  • Career growth support and wellness resources

Additional Information:

Job Posted:
December 23, 2025

Employment Type:
Fulltime
Work Type:
Hybrid work
Job Link Share:

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