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Senior Java Engineer (Core Infrastructure, Elasticsearch)

Elastic
senior
Location

Spain

Work Type

Onsite

Seniority

senior

Posted

October 2, 2026


Total Compensation
€130,000
Yearly Savings (Comfortable)
€56,000
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Job Description

  • 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

Benefits

  • Toast to your health: Fully paid health coverage for you and your family, in many locations.
  • Craft your calendar: Flexible location and schedule for most roles.
  • Create space for you: Distributed by design workforce, plus generous number of vacation days each year.
  • Embrace parenthood: Minimum of 16 weeks of parental leave, plus generous family formation benefits.
  • Give back your time: 40 hours each year to use toward volunteering with organizations and causes you’re passionate about.
  • Amplify your impact: Double your charitable giving — we match donations up to $1500 USD (or local currency equivalent).- Experience with low-level Java such as concurrency, parallelism, classloaders, etc
  • You possess the ability to collaborate across functions and teams and seamlessly transition between different projects, codebases, or teams based on business priorities
  • You have a proven track record of using AI to accelerate development, debug complex systems, and optimize code, while still owning the final outcomes
  • Hands-on experience with CI/CD systems and practices (Buildkite, Argo CD, GitOps etc)
  • Experience leading large scale projects across engineering teams
  • Proficient in algorithms and data structures
  • Willingness to dive into new issues and ask for help when you need it
  • You are able to own projects from beginning to end. This covers both technical design and working with others to develop needed components
  • You have 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 crafting APIs and the ability to reason through tradeoffs
  • You can work autonomously, drive decisions and results in a distributed team by leveraging asynchronous, direct, and transparent communication
  • Knowledge of Go
  • Knowledge of JDK internals: modules, the Java memory model, garbage collection, database load, caching techniques, etc
  • Experience with observability and telemetry solutions, particularly OpenTelemetry
  • Knowledge of containers and Kubernetes
  • Experience working in a platform team or developer productivity team
  • Knowledge of Java build tools (Gradle, Maven, etc), with a strong preference for Gradle experience
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