Core/ Infra - Senior Java Engineer - Elasticsearch

October 5, 2026

Description:

Contribute to large-scale projects evolving Elasticsearch’s core infrastructure.
Design and implement horizontally scalable features and APIs.
Develop automation and integrate agentic applications into developer workflows.
Investigate and resolve performance, concurrency, stability, and operational issues end-to-end.
Improve the operation and observability of Elasticsearch cloud systems.
Lead cross-team projects and collaborate with Elasticsearch engineers, users, and open-source projects.
Support support engineers with complex technical issues.
Own projects from technical design through delivery and coordinate required components across teams.

Requirements:

Strong Java skills, including concurrency, parallelism, classloaders, standard data structures, and newer language features.
Experience designing APIs and evaluating technical tradeoffs.
Strong knowledge of algorithms and data structures.
Hands-on experience with CI/CD systems and practices, such as Buildkite, Argo CD, or GitOps.
Experience leading large-scale projects across engineering teams.
Ability to work autonomously, drive decisions, and communicate effectively in a distributed team.
Demonstrated use of AI to accelerate development, debug complex systems, and optimize code while owning outcomes.
Preferred: Knowledge of JDK internals, the Java memory model, garbage collection, caching, or database load.
Preferred: Experience with observability and telemetry tools, especially OpenTelemetry; Go; containers; Kubernetes; or Java build tools such as Gradle or Maven.
Preferred: Experience working on platform or developer productivity teams.

Benefits:

Base salary of €67,000–€106,000 EUR with no variable compensation component.
Health coverage for employees and families in many locations.
Flexible work locations and schedules.
Generous annual vacation allowance.
Up to $2,000 matching for financial donations and service.
Up to 40 hours of paid time annually for volunteer projects.
At least 16 weeks of parental leave.

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