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Software Engineer - OpenSearch

Job in City Of London, Central London, Greater London, England, UK
Listing for: Optimizely
Full Time position
Listed on 2026-02-25
Job specializations:
  • IT/Tech
    Cloud Computing
Job Description & How to Apply Below
Position: Staff Software Engineer - Open Search
Location: City Of London

Optimizely is on a mission to help people unlock their digital potential by enabling marketing and product teams to create and optimize digital experiences across channels. With Optimizely One, we offer a fully SaaS, fully decoupled, and highly composable solution.

We are proud to help more than 10,000 businesses, including H&M, Pay Pal, Zoom, and Toyota, enrich their customer lifetime value, increase revenue and grow their brands. Our innovation and excellence are recognized by industry analysts such as Gartner, Forrester, and IDC, reinforcing our role as a trailblazer in Mar Tech.

We believe work is about more than just numbers — it’s about people. With over 1500 Optimizers across 12 global locations, our diverse team embodies the "One Optimizely" spirit, emphasizing collaboration and continuous improvement, while ensuring every voice is heard and valued. Join us and become part of a company empowering people to unlock their digital potential. To get a sneak peek into our culture, find us on Instagram: @optimizely

Staff Software Engineer Responsibilities
  • Architect, implement, and optimize Open search indexing and query pipelines for scalability and reliability.
  • Design and maintain backup, disaster recovery, and failover strategies for Open search clusters.
  • Lead root cause analysis and resolution of complex search-related incidents and performance bottlenecks.
  • Drive automation for cluster provisioning, upgrades, and configuration management (e.g., with Terraform, Ansible, or Kubernetes).
  • Mentor engineers on Open search internals, query optimization, and troubleshooting.
  • Collaborate with product and engineering teams to translate business requirements into robust search features.
  • Own capacity planning and cost optimization for search infrastructure.
  • Author technical documentation and best practices for search development and operations.
Why this team is critical to Optimizely
  • Business Impact: Optimizely Graph is the core content delivery and search service powering the SaaS version of our Content Management System (CMS). Our customers rely on Graph for high performance and advanced query capabilities to deliver exceptional user experiences. Graph's reliability and speed directly impact their business success.
  • High Visibility & Innovation
    :
    Our roadmap prioritizes innovative content delivery and search features, placing search and AI at the forefront of our service offering. This focus differentiates us from competitors and empowers our customers to build cutting-edge web and mobile applications.
  • Shape the Future of Digital Experiences
    :
    The team influences how customers engage their audiences and achieve business objectives through innovative search and content delivery experiences.
Technologies we work with
  • Graph

    QL, REST
  • Cloudflare workers, Kubernetes
  • Open Search
Education

Bachelor’s Degree (Computer Science or engineering preferred) or equivalent work experience

Optimizely is committed to a diverse and inclusive workplace. Optimizely is an equal opportunity employer and does not discriminate on the basis of race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status.

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