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Senior Software Engineer - Performance Tuning - Elasticsearch

Elastic· Platform - Elasticsearch
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Hybrid (Ireland)€87.3k - €138.1kfull-timePosted 2w ago

About the role

Senior Software Engineer focused on performance tuning for Elasticsearch, contributing to performance engineering initiatives, modeling, benchmarking, and AI-assisted optimization harnesses to improve performance, predictability, and scalability.

Responsibilities

  • Contributing to core performance engineering initiatives from development to production, focusing on optimizations and architectural/code-level improvements.
  • Implementing foundational performance models and methodologies for complex, distributed systems.
  • Supporting optimization strategies to keep Elasticsearch performant, predictable, and scalable in diverse environments.
  • Profiling and analyzing system behavior to identify bottlenecks in logging, metrics, vector search, and ES|QL.
  • Ensuring robust performance benchmarks and regression detection for both stateful and serverless architectures.
  • Collaborating with peers to apply performance-focused development practices to new features.
  • Contributing to automation efforts by building AI-assisted optimization harnesses for profiling, hypothesis testing, and benchmarking.
  • Providing technical guidance and peer reviews to engineers, fostering technical excellence.

Qualifications

  • Deep knowledge of Java internals and JVM memory management; ability to write high-performance, thread-safe, lock-free code; experience with large open-source and enterprise codebases.
  • Proven experience in profiling and optimizing distributed systems, including benchmarking tools (e.g., JMH, Rally), identifying regressions, and implementing optimizations.
  • Solid understanding of distributed systems architecture, including partition tolerance, cluster state propagation, and scaling in large-scale data stores.
  • Proven track record of using AI or advanced tooling to accelerate optimization, debugging performance issues, and automating benchmarking workflows.
  • Ability to collaborate effectively within a team and across functions, and to switch between projects as priorities change.
  • Ability to work autonomously, drive decisions, and contribute in a distributed team via asynchronous, direct, and transparent communication.

Skills

Required:Java internals and JVM memory managementProfiling and optimization of distributed systemsAI-assisted optimization and automation

Benefits

  • Competitive pay based on the work you do here and not your previous salary
  • Health coverage for you and your family in many locations
  • Flexible locations and schedules
  • Generous vacation days
  • Company matching of donations up to $2000 or local currency equivalent
  • Up to 40 hours per year for volunteer projects
  • Minimum of 16 weeks of parental leave
  • Diversity and inclusive culture with equal opportunity employer
Last updated Oct 8, 2026. Interested? Apply on the company site.
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