CPU: 95%
Memory: 87%
Throughput: 1.2M/s
Latency: 2.3ms
Senior Performance Engineer

Arunkumar Saravanan

Performance & Scalability Engineering

$1.8M
Cost Savings
70%
STW Reduction
5-10%
CPU Utilization Improvement
Chennai, Tamil Nadu, India

System Performance

Online
Response Time (ms)
QPS 12.5K
P99 45ms
Error Rate 0.01%

About Me

Arunkumar Saravanan

As a Performance Engineer, I specialize in optimizing large-scale distributed systems, enhancing efficiency, and driving cost savings. My passion lies in scalability, cloud performance, and real-time analytics. Currently at StarTree, I'm building a Release Certification Framework as a Service that streamlines performance and functional validation for StarTree Pinot.

At StarTree

  • Conducted Graviton benchmarking for StarTree Pinot
  • Built comprehensive Testing Framework as a Service with automation framework for performance benchmarks
  • Onboarded 15+ customer replica queries and contributed to OOM Protection testing
  • Conducted thorough regression tests for Pauseless Ingestion & Dedup
  • Improved certification + regression testing and performance benchmarks
  • Revisiting ClickBench, fixing failing queries, tuning for better performance

Previously at Salesforce

  • Led GP2 → GP3 migration, driving $1.8M in cost savings
  • Enhanced internal AI Agent with LLM-based intent recognition and chat history integration
  • Collaborated with AWS team on Graviton 3rd & 4th Gen processor performance evaluation
  • JVM tuning and heap optimization contributing to 5-10% CPU utilization improvement
  • Evaluated Zing JVM performance in collaboration with Azul team
  • Worked on Salesforce Release and Patch Certification on Hyperforce environments

Earlier at Zoho

  • Improved Application Server scalability through JVM, JIT & Heap tunings
  • Reduced ParNew Garbage collection STW duration by 70%
  • Worked on API scaling including code optimization and capacity planning
  • Set up monitoring team and tools for Premium Customers
  • Experience with profiling tools like VisualVM and Async Profiler
1000+ LinkedIn Followers
500+ Connections

Experience

Mar 2025 - Present

Senior Performance Engineer

StarTree

Remote - Chennai, Tamil Nadu, India

Certification & Regression Testing

  • Conducted thorough regression tests for Pauseless Ingestion & Dedup, identifying critical failure case related to Star-Tree index reloading, segment status issue[fix in PR-16706 in Pinot OSS]
  • Improved Certification + Regression testing, including 0.11.0 & 0.12.0 certification, performance tests, and covering Pauseless table operations.

Certification Framework

  • Built comprehensive Testing Framework as a Service with automation framework for performance benchmarks
  • Onboarded 15+ Customers replica queries

Benchmark

  • Conducted Graviton benchmarking for StarTree Pinot
  • Revisiting Clickbench, fixing previously failing queries, applying tunings to improve performance, and optimizing query performance based on JFR profiles
Aug 2023 - Mar 2025

Member of Technical Staff

Salesforce

Bangalore, Karnataka, India

AI & LLM

  • Enhanced internal AI Agent with LLM-based intent recognition and chat history integration
  • Developed POC to solve broken selector problem using LLM for UI-based testing

EC2 Selection & Cloud Performance

  • Led Graviton 3rd & 4th Gen processor performance evaluation in Hyperforce CoreApp in collaboration with AWS team
  • Worked on performance assessments for different App and DB instance types (m6i.24xl, u-6tb1)
  • Led GP2 to GP3 migration evaluation in Hyperforce, resulting in ~$1.8M in cost savings
  • Worked on vertical scaling performance evaluation for m6a.32xl instance type

JVM/JDK Optimization

  • JVM tuning including THP, StringDedup, Escape analysis - contributed to 5-10% CPU utilization improvement
  • JVM heap size reduction effort to 48GB - contributed to ~3GB heap size improvement
  • Evaluated Zing JVM performance in collaboration with Azul team
  • Worked on performance evaluation for JDK11 to JDK17 migration
Jan 2022 - Jul 2023

Associate Member of Technical Staff

Salesforce

Hyderabad, Telangana, India

Database Performance

  • Assisted with performance load execution and DB analysis for migrating premium customer to Salesforce's in-house database
  • Worked on evaluating performance of key scaling feature of Salesforce's in-house database

Release Certification

  • Worked on Salesforce Release and Patch Certification on Hyperforce and First Party environments
  • Assisted in RHEL9 OS performance assessment in Hyperforce to debug and analyze performance profiles

Tooling & Automation

  • Created data transfer pipeline to Tableau Analytics using Python & Shell
  • Developed JMeter scripts for performance assessments and stabilized existing workloads
  • Developed utility tool to validate performance load generating payloads to boost productivity
Aug 2020 - Dec 2021

Performance and Scalability Engineer

Zoho Corporation

Chennai, Tamil Nadu, India

Application Server Scalability

  • Improved Application Server's scalability through several JVM, JIT & Heap tunings
  • Reduced ParNew Garbage collection STW duration by around 70%
  • Worked on API scaling including code optimization and capacity planning

Monitoring & Performance

  • Set up monitoring team and tools for Premium Customers
May 2019 - Jul 2020

Site Reliability Engineer

Zoho Corporation

Chennai, Tamil Nadu, India

Monitoring & Performance

  • Worked on monitoring staging setup of Zoho CRM to flag off build release to Production
  • Educated developers in improving performance

Debugging & Optimization

  • Experience in debugging and code optimization in staging and Production environment
  • Experience with profiling tools like VisualVM, Async Profiler
  • Worked with development teams to ensure product scalability before live releases
Feb 2019 - Mar 2019

Project Trainee

Zoho Corporation

Chennai, Tamil Nadu, India

Technical Skills

General

JVM JIT GC Generative AI

Cloud Computing

AWS

Performance Testing

JMeter

Programming Languages

Java Python Javascript

Databases

MySQL PostgreSQL

Operating Systems

Linux

Tools

Docker Kubernetes Grafana Prometheus Jenkins Shell

Education

2015 - 2019

B.Tech., Information Technology

Anna University, Tindivanam campus

Licenses & Certifications

Generative AI with Large Language Models

Coursera

Oct 2024

Certificate ID: 5XGK2Y4Q5KYT

Certificate Link

Contact

Location

Chennai, Tamil Nadu, India