Sr. Software Engineer, Backend/Cloud

Salary: £45,500 - 73,500 per year

Requirements:

• We are looking for a collaborative team player who lifts those around them.
• We require 8+ years of professional software engineering experience, including 5+ years building and operating distributed systems or cloud-native services at scale in production.
• We need strong understanding of distributed systems, scalability, RESTful patterns, and multithreading concepts.
• We need proficiency building and scaling resilient, low-latency production services using Go, Python, Java, C++, or C#.
• We require hands-on experience with Docker, Kubernetes, and cloud platforms, preferably AWS or GCP.
• We need strong communication and collaboration skills across functions and levels, with a bias for ownership and a customer-first mindset.
• We require proven ability to translate complex and ambiguous business requirements into technical solutions and deliver projects on schedule.
• We require proven experience using AI technologies to enhance decision-making, streamline workflows and processes, improve efficiency, and drive business outcomes.
• Bonus points for currently developing Go-based microservices for scalable, high-throughput architectures.
• Bonus points for experience in cybersecurity, SIEM, SOAR, or adjacent security domains.
• Bonus points for hands-on experience with LLM integration, prompt engineering, RAG pipelines, or agentic AI frameworks.

Responsibilities:

• We own the engineering bar by driving architectural improvements, setting the standard for code quality, and ensuring our systems are performant, reliable, and built to last.
• We lead system design and architecture decisions, including design reviews and RFC processes.
• We develop Go-based microservices supporting threat detection, case management, and incident response workflows, along with RESTful APIs that power customer-facing capabilities.
• We take end-to-end ownership of technical initiatives, individually and as part of a team, across projects of increasing scope and complexity.
• We work closely with designers, product managers, and engineers across product groups to understand, design, and implement solutions.
• We mentor junior and mid-level engineers through pair programming, code reviews, and one-on-one knowledge sharing.
• We contribute to AI-powered capabilities including LLM integration, agentic workflows, and intelligent analyst tooling.
• We participate in the on-call rotation and drive improvements that reduce team toil and increase system reliability.
• We operate with a high degree of autonomy and are trusted to make decisions and drive outcomes.

Technologies:

• Agentic AI
• AI
• AWS
• C#
• Cloud
• Docker
• GCP
• Java
• Kubernetes
• LLM
• Python
• RAG
• Security
• microservices
• Architect
• Backend
• DevOps
• Support

More:

We are CrowdStrike, a global leader in cybersecurity, protecting the people, processes, and technologies that drive modern organizations. Since 2011, our mission has been to stop breaches, and we have redefined modern security with the worlds most advanced AI-native platform. Our teams work on large-scale distributed systems processing almost 3 trillion events per day, and we serve customers across all industries. This role sits within our Threat Detection and Incident Response (TDIR) team, helping advance our AI-native Falcon Next-Gen SIEM platform from our London, United Kingdom location in a full-time, hybrid environment. We offer market-leading compensation and equity awards, comprehensive physical and mental wellness programs, competitive vacation and holidays, paid parental and adoption leave, professional development opportunities, employee networks, volunteer opportunities, and a vibrant office culture with world-class amenities. We are proud to be a Great Place to Work Certified employer and an equal opportunity employer committed to belonging, inclusion, and supporting veterans and individuals with disabilities.

last updated 34 week of 2026