Senior Software Engineer - AI CMS & Cloud (Remote UK)

Optimizely; Greater London; Hybrid; GBP 63,000 - 103,000; Full time

Benefits offered by this job

Hybrid work setup

Remote work for UK-based candidates

Job summary

Optimizely in London is seeking a senior software engineer to design, build, and maintain scalable CMS features and integrations. You will work in a cross-functional, agile team on AI-powered content tools and REST APIs.

The role requires ~8+ years in software engineering, strong C#, .NET, React frontend, cloud knowledge, and a mindset for testing and quality. Hybrid London/UK remote options are available.

Qualifications

• ~8+ years of experience in software engineering, flexible depending on experience.
• Strong fundamentals in software design and engineering.
• Experience with C# and .NET, and React on the frontend.
• Experience with CMS platforms, content modelling, or similar domains.
• Experience building and operating cloud-based systems.
• Comfortable using AI tools in the daily workflow for problem solving, learning, and improving code quality and delivery speed, with the ability to guide AI-assisted development using structured instructions to generate code in a controlled and maintainable way.
• Interest or experience in leveraging AI agents to further enhance productivity.
• Strong testing mindset, with a focus on building reliable, well-tested systems and maintaining high code quality.
• Comfortable working in cross-functional, agile teams.
• Strong communication and collaboration skills.
• Bachelor's degree in Computer Science or engineering preferred, or equivalent work experience.

Responsibilities

• Design, build, and maintain scalable, maintainable software systems.
• Develop CMS features, add-ons, APIs, and integrations with external systems.
• Contribute to system design and architectural decisions.
• Ensure product quality through automated testing and operational best practices.
• Own services in production, including monitoring and incident handling.
• Collaborate with product managers, designers, and engineers to deliver features end to end.
• Consider real-world usage and customer needs in technical decisions.
• Mentor other engineers and contribute to knowledge sharing.
• Participate in hiring and help grow the engineering team.

Skills

8+ years experience

Strong software design fundamentals

C# & .NET

React frontend

AI tools usage

AI agents usage

Testing mindset

Cross-functional, agile teams

Communication & collaboration

Bachelors in CS or Engineering

Education

Bachelor's degree in Computer Science or engineering

Tools

CMS platforms

Azure

ASP.NET

REST APIs

React

Cloud

DXP

Job description

Optimizely in London is seeking a senior software engineer to design, build, and maintain scalable CMS features and integrations. You will work in a cross-functional, agile team on AI-powered content tools and REST APIs.

The role requires ~8+ years in software engineering, strong C#, .NET, React frontend, cloud knowledge, and a mindset for testing and quality. Hybrid London/UK remote options are available.