Senior Software Engineer in Test

Join to apply for the Senior Software Engineer in Test role at AxonJoin Axon and be a Force for Good.At Axon, we’re on a mission to Protect Life. We’re explorers, pursuing society’s most critical safety and justice issues with our ecosystem of devices and cloud software. Like our products, we work better together. We connect with candor and care, seeking out diverse perspectives from our customers, communities and each other.Life at Axon is fast-paced, challenging and meaningful. Here, you’ll take ownership and drive real change. Constantly grow as you work hard for a mission that matters at a company where you matter.Your ImpactAxon 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.Work Location: This role is based out of our London office and follows a hybrid schedule. We rely on in-person collaboration and ask that team members work onsite Tuesdays through Fridays, with the flexibility to work remotely on Mondays, unless there is an approved workplace accommodation. We believe that connection fuels innovation, and our in-office culture is designed to foster meaningful teamwork, mentorship, and shared success.What You’ll DoArchitect 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.What You Bring7+ 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 HaveBackground 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.Who You AreEngineering-Driven – You bring a software-first mindset to quality and reliability.Strategic Thinker – You balance fast execution with long-term test infrastructure health.Mentor and Collaborator – You help others grow through reviews, pairing, and shared accountability.System Debugger – You enjoy diving into logs, tracing services, and unraveling complex bugs.Mission-Oriented – You take pride in building systems that people rely on in high-stakes moments.Benefits that benefit youCompetitive base salary and RSUsComprehensive pension plan with matching contributionPrivate health insurance & cash plans30 days paid holiday + UK public holidaysEnhanced maternity/paternity leaveGymPass subscriptionLife assurance & income protectionCareer growth support and wellness resourcesDon’t meet every single requirement? That's ok. At Axon, we Aim Far. We think big with a long-term view because we want to reinvent the world to be a safer, better place. We are also committed to building diverse teams that reflect the communities we serve.Axon is an equal opportunity employer that promotes justice, advances equity, values diversity and fosters inclusion. We’re committed to hiring the best talent — regardless of race, creed, color, ancestry, religion, sex (including pregnancy), national origin, sexual orientation, age, citizenship status, marital status, disability, gender identity, genetic information, veteran status, or any other characteristic protected by applicable laws, regulations and ordinances — and empowering all of our employees so they can do their best work. If you have a disability or special need that requires assistance or accommodation during the application or the recruiting process, please email recruitingops@axon.com. #J-18808-Ljbffr