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Reliability Staff Software Engineer - OpenSearch

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Optimizely

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Location:
United Kingdom , London

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Category:
IT - Software Development

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Salary:

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Job Description:

We're seeking a skilled Staff Software Engineer with leadership ambition, to join our Graph team. This role requires significant experience designing, implementing, and maintaining SaaS with high traffic load. This role requires several years of experience directly managing scalable and reliable Elasticsearch and/or Opensearch clusters. You will own epics from initial requirements gathering (PRD) through to successful completion, collaborating with stakeholders to ensure solutions meet market needs. You will also focus on the request latency when implementing features, to make sure our customer's applications have good performance.

Job Responsibility:

  • Architect, implement, and optimize Opensearch indexing and query pipelines for scalability and reliability
  • Design and maintain backup, disaster recovery, and failover strategies for Opensearch 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 Opensearch 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

Requirements:

  • Bachelor’s Degree (Computer Science or engineering preferred) or equivalent work experience
  • Significant experience designing, implementing, and maintaining SaaS with high traffic load
  • Several years of experience directly managing scalable and reliable Elasticsearch and/or Opensearch clusters
  • Experience with TypeScript, JavaScript, C#
  • Experience with GraphQL, REST
  • Experience with Cloudflare workers, Kubernetes
  • Experience with OpenSearch

Additional Information:

Job Posted:
February 17, 2026

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