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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - Performance Tuning - Elasticsearch - **Company:** Elastic - **Location:** Mountain View, CA, United States - **Experience:** Expert - **Salary:** $133,100.0 - $210,600.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Artificial Intelligence, Big Data, C++ (Programming Language), Profiling, Data Stores, Software Debugging, Distributed Systems, Memory Management, Elasticsearch, Statistical Hypothesis Testing, Java Virtual Machine (JVM), Open Source Technology, Performance Tuning, Search Technologies, Database Engines, Systems Integration, Data Logging, Java Application Server, Search Engines, Codebase, Serverless Computing - **Published:** August 19, 2026 - **Apply:** https://diversityjobs.com/main/sendform/8/8/28176/1/17986710?backUrl=%2Fcareer%2F17986710%2FSenior-Software-Engineer-Performance-Tuning-Elasticsearch-California-Mountain-View ## About the Role * You have deep knowledge of Java internals and JVM memory management. You understand how concurrency models work. You can write code that is high-performance, thread-safe, and lock-free. This experience includes working with large open-source and enterprise codebases. * You have proven experience in profiling and optimizing distributed systems. This includes deep experience with benchmarking tools (e.g., JMH, Rally), identifying performance regressions, and implementing algorithmic or hardware-aware optimizations. * You have a solid comprehension of distributed systems architecture, including partition tolerance, cluster state propagation, and scaling challenges in large-scale data stores. * You have a proven track record of using AI or advanced tooling to accelerate optimization, debug complex performance issues, and automate benchmarking workflows. * You possess the ability to collaborate effectively within a team environment, contributing to the success of performance engineering goals. * 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 result in a distributed team by leveraging asynchronous, direct, and transparent communication. Bonus Points: * Experience integrating high-performance native libraries (e.g., C++, Rust, SIMD-accelerated code) into Java applications. * Deep knowledge of modern storage engine performance, index modes, or vector search optimizations. * Experience defining and managing Performance SLAs and success criteria for distributed systems. * Experience working on the internals of a large-scale data store or search engine. * Experience working on the internals of a data store or search engine. ## Description Elasticsearch powers search, observability, and AI retrieval (RAG) for the world's largest organizations. We are seeking a Senior Software Engineer to join the Elasticsearch Performance team. In this role, you will contribute to performance engineering initiatives through high-quality code and technical analysis. Your goal is to help improve the optimization and predictability of Elasticsearch performance, collaborating with area-specific teams to enhance our software. What You Will Be Doing: * Contributing to core performance engineering initiatives from development to production, focusing on the delivery of impactful optimizations. Executing technical designs and plans for architectural and code-level performance improvements. * Implementing foundational performance models and methodologies for complex, distributed systems. * Supporting 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 with peers across the team to apply performance-focused development practices into new features. * Contributing to automation efforts by building AI-assisted optimization harnesses that streamline profiling, hypothesis testing, and benchmarking. * Providing technical guidance and peer reviews to other engineers, fostering a culture of technical excellence. ## Related Videos - [Alibaba Big Data and Machine Learning Technology](https://www.wearedevelopers.com/videos/37-alibaba-big-data-and-machine-learning-technology) - [Getting to Know Your Legacy (System) with AI-Driven Software Archeology](https://www.wearedevelopers.com/videos/1437-getting-to-know-your-legacy-system-with-ai-driven-software-archeology) - [Profiling Symfony & PHP apps with Blackfire](https://www.wearedevelopers.com/videos/265-profiling-symfony-php-apps-with-blackfire) - [Add Location-based Searching to Site with ElasticSearch](https://www.wearedevelopers.com/videos/77-add-location-based-searching-to-site-with-elasticsearch) - [PySpark - Combining Machine Learning & Big Data](https://www.wearedevelopers.com/videos/44-pyspark-combining-machine-learning-big-data) - [Why your codebase lies to AI?](https://www.wearedevelopers.com/videos/100281-why-your-codebase-lies-to-ai) ## Related Articles - [Top 10 Java Libraries](https://www.wearedevelopers.com/magazine/364-top-10-java-libraries) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [93 Java Interview Questions You Should Prepare For](https://www.wearedevelopers.com/magazine/14-93-java-interview-questions-you-should-prepare-for) - [Top Big Data Technologies That You Need to Know](https://www.wearedevelopers.com/magazine/108-top-big-data-technologies-that-you-need-to-know)