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Principal Software Engineer - Performance Tuning - Elasticsearch

Elastic· Platform - Elasticsearch
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Hybrid (Ireland)€104.8k - €165.7kFull-timePosted 2mo ago

About the role

Lead architectural and code-level performance engineering initiatives for Elasticsearch, driving optimization, predictability, and scalability of the platform across diverse environments.

Responsibilities

  • Owning core performance engineering initiatives from architecture to production, leading technical design, plan, and execution for major architectural and code-level performance improvements.
  • Developing foundational performance models and methodologies for complex, distributed systems.
  • Driving optimization strategies to ensure Elasticsearch remains 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 stateless (Serverless) architectures.
  • Collaborating across the company to embed performance-first thinking into new features from the outset.
  • Drive automation efforts by designing and building AI-assisted optimization harnesses that streamline profiling, hypothesis testing, and benchmarking.
  • Mentoring and coaching other engineers, fostering a culture of technical excellence and performance-aware development.

Qualifications

  • Deep knowledge of Java internals and JVM memory management; ability to write high-performance, thread-safe, lock-free code across large open-source and enterprise codebases.
  • Proven experience profiling and optimizing distributed systems, including benchmarking tools (e.g., flamegraphs, 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 using AI or advanced tooling to accelerate optimization, debugging performance issues, and automating benchmarking workflows.
  • Ability to collaborate across functions and teams and transition between projects, codebases, or teams based on priorities.
  • Ability to work autonomously, drive decisions, and operate effectively in a distributed team with asynchronous, direct, and transparent communication.

Skills

Required:Java performance and concurrencyDistributed systems profiling and optimizationAI-assisted optimization and automation

Benefits

  • Competitive pay based on work performed
  • Health coverage for you and your family in many locations
  • Flexible locations and schedules for many roles
  • Generous vacation days
  • Company matching of donations up to $2000 (or local currency equivalent)
  • Up to 40 hours per year for volunteering
  • Minimum 16 weeks of parental leave
Last updated Sep 24, 2026. Interested? Apply on the company site.
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