Senior Java Core Infra Engineer

Elastic; Spain; On-site; EUR 118,000 - 225,000; Full time

Benefits offered by this job

Health coverage

Flexible locations and schedules

Vacation days

Donations match up to $2000

Volunteer hours

Parental leave

Job summary

Elastic, the Search AI Company, seeks a Senior Software Engineer to join the Elasticsearch team and help make core infrastructure easy to use, fast, and secure.

You will design and implement scalable APIs, tackle performance and concurrency challenges, and collaborate across teams to deliver serverless, cloud, and on‑premise solutions for Elasticsearch customers. You will contribute to open source projects, automate workflows, and mentor others while owning projects end‑to‑end.

Qualifications

• Experience crafting APIs and the ability to reason through tradeoffs.
• Proficient in algorithms and data structures.
• Strong core Java skills, concurrency, and standard library knowledge.
• Hands-on CI/CD experience (Buildkite, Argo CD, GitOps).
• Experience leading large-scale projects across engineering teams.
• Willingness to dive into new issues and ask for help when needed.
• Ability to own projects end-to-end, from design to delivery.
• Proven track record of using AI to accelerate development and debugging.

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

API design

Algorithms & DS

Core Java

Concurrency

CI/CD

Lead large projects

Autonomy

AI-assisted development

Cross-functional collaboration

Distributed teamwork

Tools

Gradle

Maven

OpenTelemetry

Kubernetes

Docker

Buildkite

Argo CD

Job description

Elastic, the Search AI Company, seeks a Senior Software Engineer to join the Elasticsearch team and help make core infrastructure easy to use, fast, and secure.

You will design and implement scalable APIs, tackle performance and concurrency challenges, and collaborate across teams to deliver serverless, cloud, and on‑premise solutions for Elasticsearch customers. You will contribute to open source projects, automate workflows, and mentor others while owning projects end‑to‑end.