Senior Java Engineer - Core Infra & Elasticsearch APIs

Elastic; Madrid; Híbrido; EUR 70.000 - 120.000; Jornada completa

Descripción de la vacante

Elastic is seeking a highly capable engineer to contribute to core Elasticsearch infrastructure in Madrid, Spain. You will design scalable features, tackle performance and concurrency challenges, and enhance observability across cloud systems.

Ideal candidates will have deep Java experience, Go knowledge, and a track record of leading large-scale projects, with strong API design skills and proficiency in CI/CD and distributed collaboration.

Formación

• Experience with low-level Java, concurrency and classloaders.
• Ability to collaborate across functions and teams and transition between projects.
• Proven track record of using AI to accelerate development and debug complex systems.
• Hands-on experience with CI/CD systems (Buildkite, Argo CD, GitOps etc).
• Experience leading large scale projects across engineering teams.
• Proficient in algorithms and data structures.
• Willingness to own projects end-to-end, from design to delivery.
• Strong core Java knowledge and familiarity with data structures and concurrency constructs.
• Experience crafting APIs and reasoning about tradeoffs.
• Ability to work autonomously in a distributed team via asynchronous communication.

Responsabilidades

• Contribute to large, impactful projects evolving Elasticsearch core infrastructure.
• Improve developer productivity by automation and integrating agentic apps into workflows.
• Design and implement new horizontally-scalable features and APIs in Elasticsearch.
• Solve difficult issues including performance or concurrency problems and propose solutions.
• Improve operation and observability of Elasticsearch cloud systems.
• Collaborate openly with the ES team, Elastic users, and other OSS projects.
• Support our engineers with challenging problems.
• Own operational investigations end-to-end until performance or stability issues are resolved.

Conocimientos

Low-level Java

Go language

JDK internals

Concurrency & parallelism

API design

CI/CD

Observability (OpenTelemetry)

Kubernetes

Gradle/Maven

Data structures

Distributed collaboration

Herramientas

Build tools

Descripción del empleo

Elastic is seeking a highly capable engineer to contribute to core Elasticsearch infrastructure in Madrid, Spain. You will design scalable features, tackle performance and concurrency challenges, and enhance observability across cloud systems.

Ideal candidates will have deep Java experience, Go knowledge, and a track record of leading large-scale projects, with strong API design skills and proficiency in CI/CD and distributed collaboration.