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Senior Software Engineer

optimizely.com Logo

Optimizely

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Location:
United Kingdom , London

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

We’re looking for a Senior Software Engineer for one of our CMS product teams, working from the UK, to help us shape the future of Optimizely’s products and offerings. We’re at the top of industry analyst ratings and pushing to take both the PaaS and SaaS versions of our CMS further. A big part of that push is Opal, our always-on AI workforce that improves productivity for content teams.

Job Responsibility:

  • Design, implement, and document software solutions that are simple, secure, scalable, and maintainable
  • Own the operational excellence of your domain, including instrumentation, monitoring and alerting
  • Ensure product quality through thorough automated testing
  • Drive delivery of complex features end-to-end, working across team boundaries when needed
  • Contribute to architecture and design discussions within your team and across teams
  • Participate in project planning, requirements gathering, design, and task refinement
  • Handle incidents and assist our support organisation when they need engineering expertise on customer cases
  • Bring customer perspective into technical decisions
  • Mentor other engineers and share knowledge across the team
  • Participate in hiring and help grow a diverse engineering organisation

Requirements:

  • Typically 8+ years of professional experience with modern software development practices
  • Strong software design and engineering fundamentals, including object-oriented analysis and design
  • Solid experience with C# and .NET, and with React on the frontend
  • Hands-on experience with CMS platforms, content modelling, or digital experience tooling
  • Experience building and operating cloud-based software
  • Already using AI tools, coding assistants, and potentially agents as part of your daily workflow
  • Comfortable working in an agile environment alongside designers, product managers, and other stakeholders
  • Good communicator who enjoys solving problems together with others

Nice to have:

  • Experience with Optimizely CMS or other CMS/DXP platforms
  • .NET Core MVC
  • SQL (particularly MS SQL)
  • Containers and container orchestration
  • Microsoft Azure
  • HTTP APIs, REST services, or GraphQL
  • Experience building large, modular applications with continuous delivery
  • A degree in Computer Science or equivalent
What we offer:
  • Diverse and inclusive workplace
  • Equal opportunity employer

Additional Information:

Job Posted:
May 04, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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