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Senior Java Engineer - Core/ Infra - Elasticsearch

Elastic· Platform - Elasticsearch
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Hybrid (Spain)€67k - €106kfull-timePosted 4w ago

About the role

Senior Software Engineer focused on core Elasticsearch infrastructure, APIs, and observability. Build foundational infrastructure, tooling, and shared functionality to make Elasticsearch easy to use, performant, secure, and extensible across serverless, cloud, and on-premise deployments.

Responsibilities

  • Contributing to large, impactful projects that evolve the core infrastructure that underpins Elasticsearch.
  • Making Elasticsearch developers more productive by identifying and developing opportunities for automation, and integrating agentic apps into development workflows.
  • Designing and implementing new horizontally-scalable features and APIs in Elasticsearch.
  • Solving difficult issues, including performance or concurrency issues, and proposing solutions.
  • Improving operation and observability of Elasticsearch cloud systems.
  • Collaborating in the open with the ES team, Elastic users, and other supporting open source projects.
  • Supporting our support engineers with the harder problems.
  • Owning operational investigations end-to-end, until performance or stability issues are successfully resolved.

Qualifications

  • Experience crafting APIs and the ability to reason through tradeoffs.
  • Proficient in algorithms and data structures.
  • Strong skills in core Java and are conversant in the standard library of data structures and concurrency constructs, as well as newer language features.
  • Experience with low-level Java such as concurrency, parallelism, classloaders, etc.
  • Hands-on experience with CI/CD systems and practices (Buildkite, Argo CD, GitOps etc).
  • Experience leading large scale projects across engineering teams.
  • Willingness to dive into new issues and ask for help when you need it.
  • Ability to own projects from beginning to end, covering technical design and cross-team collaboration.
  • Proven track record of using AI to accelerate development, debug complex systems, and optimize code, while owning final outcomes.
  • Ability to collaborate across functions and teams and transition between projects, codebases, or teams based on priorities.
  • Ability to work autonomously, drive decisions and results in a distributed team via asynchronous, direct, and transparent communication.

Skills

Required:API design and tradeoff reasoningAlgorithms and data structuresCore JavaLow-level Java (concurrency, parallelism, classloaders)CI/CD systemsCross-team project leadershipAutonomous work style

Benefits

  • Competitive pay based on the work you do here and not your previous salary
  • Health coverage for you and your family in many locations
  • Flexible locations and schedules for many roles
  • Generous number of vacation days each year
  • Company donations matching up to $2000 (or local currency equivalent)
  • Up to 40 hours each year toward volunteer projects
  • Minimum of 16 weeks of parental leave
Last updated Oct 1, 2026. Interested? Apply on the company site.
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