Staff Software Engineer

We are looking for a Staff Software Engineer to join one of our core CMS product teams in London, helping shape the future of Optimizely s digital experience platform.

As a Staff Engineer, you will operate as a technical leader and force multiplier, driving architectural direction, enabling teams to deliver at scale, and influencing engineering excellence across teams.

What You ll Do

• Act as a technical leader across your team and adjacent teams, contributing from discovery through architecture, implementation, and delivery
• Own and drive large, complex initiatives (epic-level) end-to-end, aligning technical execution with business outcomes
• Partner closely with Product Managers, Designers, and other stakeholders to shape solutions that deliver maximum customer value
• Guide architectural decisions across distributed, scalable SaaS systems, balancing performance, cost, and maintainability
• Champion engineering excellence, improving development practices, testing, and system reliability across teams
• Mentor and coach engineers, helping raise the bar across the organization
• Contribute to cross-team technical strategy, influencing platform evolution beyond your immediate team
• Leverage modern tooling, including AI-assisted development (e.g., GitHub Copilot), to improve productivity and quality

Knowledge and Experience

• 8 612+ years of professional software engineering experience, with recent experience operating at a senior or staff level
• Strong experience building scalable backend systems, ideally with C# and .NET (ASP.NET)
• Solid understanding of distributed systems, APIs (REST/GraphQL), and SaaS architectures
• Experience contributing to architecture and system design across multiple teams or domains
• Comfortable working across the stack when needed (frontend experience with JavaScript/TypeScript/React is a plus, not the core focus)
• Proven ability to lead without authority, influence decisions, and act as a multiplier for other engineers
• Strong communication skills and ability to collaborate across functions and geographies
• Experience working in agile, fast-paced environments with a strong sense of ownership

Nice to Have

• Experience with CMS, DXP, or content-driven platforms
• Experience building and maintaining SaaS products at scale
• Familiarity with cloud platforms (Azure preferred)
• Experience designing and maintaining SDKs or extensible APIs
• Exposure to modern frontend architectures (e.g., micro-frontends)
• Experience with containers and orchestration technologies