Principal Software Engineer - Performance Tuning - Elasticsearch

Elastic
Romania
Workplace: OnsiteFull timeRON 326,400 - 516,400Function: Software EngineeringSkills: ["Collaboration","Mentoring","Autonomy","Problem-solving","Performance awareness"]

Lead architectural and code-level performance engineering for Elasticsearch, focusing on high-impact optimizations across architecture to production. Build performance models and methodologies for complex distributed systems, drive benchmarking and regression detection, and profile system behavior across logging, metrics, vector search, and ES|QL. Create AI-assisted optimization harnesses to streamline profiling and benchmarking, and mentor engineers to embed performance-first thinking across teams.

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FursaFursa
Elastic
Elastic
4 days ago

Principal Software Engineer - Performance Tuning - Elasticsearch

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Last checked: 3 hours agoStatus: Live

Job Summary

Lead architectural and code-level performance engineering for Elasticsearch, focusing on high-impact optimizations across architecture to production. Build performance models and methodologies for complex distributed systems, drive benchmarking and regression detection, and profile system behavior across logging, metrics, vector search, and ES|QL. Create AI-assisted optimization harnesses to streamline profiling and benchmarking, and mentor engineers to embed performance-first thinking across teams.
Location: Romania
Workplace: Onsite
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Own core performance engineering initiatives from architecture through production and deliver high-impact optimizations.
  • •Design and execute major architectural and code-level performance improvements.
  • •Develop performance models and methodologies for complex distributed systems.
  • •Benchmark, detect regressions, and ensure Elasticsearch remains performant, predictable, and scalable across environments.
  • •Drive automation efforts by designing AI-assisted optimization harnesses and mentoring engineers to embed performance-first practices.

Pay and Benefits

Salary: RON 326,400 - 516,400
Perks:Health InsurancePaid LeaveParental LeaveVolunteer TimeDonations Match

Key Requirements

  • •Deep knowledge of Java internals and JVM memory management, including concurrency models.
  • •Experience profiling and optimizing distributed systems, including benchmarking with tools like flamegraphs, JMH, and Rally.
  • •Strong understanding of distributed systems architecture (e.g., partition tolerance, cluster state propagation, scaling).
  • •Proven ability to use AI or advanced tooling to accelerate optimization and automate benchmarking workflows.
  • •Ability to collaborate across teams and drive decisions autonomously in a distributed environment.
Experience:Open sourceEnterprise softwareDistributed systemsSearch technology
Skills:CollaborationMentoringAutonomyProblem-solvingPerformance awareness
Languages:English
Tech Stack:JavaJVMElasticsearchJMHRallyFlamegraphsC++RustSIMDVector searchES|QLServerless

Company Brief

Elastic
Builds the Elastic Stack (Elasticsearch, Kibana, Beats, Logstash) and provides search, observability, and security solutions that enable organizations to search, analyze, and protect data in real time across applications, infrastructure, and enterprises.
Industry: Data Infrastructure
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: Amsterdam, Netherlands
Founded: 2012
WebsiteLinkedIn