Senior Java Engineer: Elasticsearch Core Infra & Platform

Elastic; Spain; On-site; EUR 56,000 - 88,000; Full time

Benefits offered by this job

Health coverage for you and yourfamily

Flexible locations and schedules

Generous vacation days

Donation matching up to 2000 USD

Volunteer hours (up to 40 per year)

Parental leave (minimum 16 weeks)

Job summary

Elastic, the Search AI Company, is seeking a Senior Software Engineer to join the Elasticsearch team. You will help build scalable, secure, and observable infrastructure that powers serverless, cloud, and on‑premise deployments.

You will work with Java, APIs, concurrency, and CI/CD tooling, lead cross‑team projects, and contribute to open source collaboration while improving developer productivity and performance.

Qualifications

• Experience crafting APIs and ability to reason through tradeoffs.
• Proficient in algorithms and data structures.
• Strong Java core skills 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.
• 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 a proven track record of using AI to accelerate development, debug complex systems, and optimize code, while still owning the final outcomes.
• You possess the ability to collaborate across functions and teams and seamlessly transition between different projects, codebases, or teams based on business priorities
• You can work autonomously, drive decisions and results in a distributed team by leveraging asynchronous, direct, andtransparent communication.

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.

Skills

Core Java

API design

Concurrency

CI/CD

Lead cross-team projects

AI acceleration

Distributed collaboration

Autonomy and decision-making

Tools

Gradle

Maven

Go

Kubernetes

GitOps

Job description

Elastic, the Search AI Company, is seeking a Senior Software Engineer to join the Elasticsearch team. You will help build scalable, secure, and observable infrastructure that powers serverless, cloud, and on‑premise deployments.

You will work with Java, APIs, concurrency, and CI/CD tooling, lead cross‑team projects, and contribute to open source collaboration while improving developer productivity and performance.