We are looking for a highly skilled **Lead Performance Testing Engineer** to oversee, enhance, and drive performance testing strategies for scalable, high\-performance systems at an organizational level. In this role, you will lead the development and optimization of performance testing frameworks, play a pivotal role in identifying and resolving system bottlenecks, and collaborate with leadership and cross\-functional teams to ensure our technology exceeds reliability, scalability, and performance expectations. **Responsibilities** * Define, drive, and continuously improve performance testing strategies, frameworks, and organizational plans with technical and strategic expertise * Oversee and conduct complex performance, load, stress, and endurance testing efforts for enterprise\-level web applications and backend APIs * Design realistic and advanced workload models reflecting intricate architecture and large\-scale production usage patterns * Lead deep\-dive analysis and interpretation of performance test results using advanced tools like k6 and sitespeed.io, pinpointing key optimization opportunities * Direct the identification and resolution of multi\-layered performance bottlenecks across application, infrastructure, database, and network systems * Oversee the integration of sophisticated performance test suites into CI/CD pipelines to guarantee system scalability and reliability * Implement advanced metric collection and visualization using Grafana and InfluxDB for detailed trend analysis and executive\-level reporting * Ensure detailed monitoring of system resource utilization (CPU, memory, disk, network) during tests while addressing misconfigurations with tailored solutions * Enhance automation workflows for performance testing, execution, and reporting by utilizing advanced scripting or programming techniques in TypeScript or PowerShell * Collaborate closely with senior stakeholders and other leads to proactively mitigate performance risks and strategize system improvement solutions * Lead scalable performance tuning initiatives and ensure systems consistently meet SLA, scalability, and reliability benchmarks * Actively mentor, coach, and lead team members by fostering an organizational culture of excellence and a performance\-focused mindset **Requirements** * Proven experience of 5\+ years in performance testing and optimization of complex web applications, APIs, and backend services * 1\+ years of experience leading and mentoring teams, fostering a high\-performance culture, and driving skills development within organizations * Comprehensive knowledge of performance testing methodologies and enterprise\-level best practices * Extensive hands\-on expertise with performance tools like k6, with strong familiarity or expertise in sitespeed.io * Deep proficiency in analyzing complex test outcomes, leveraging key metrics such as percentiles, distributions, and system resource insights * Proven experience using Grafana and InfluxDB to develop advanced monitoring and reporting solutions * Strong expertise in SQL, with capabilities in analyzing and optimizing complex queries for performance improvement * Expertise in systematically identifying and resolving bottlenecks in application, network, OS, and database layers for large\-scale systems * In\-depth understanding of infrastructure, load balancing patterns, and advanced system monitoring tools for enterprise environments * Advanced scripting and programming skills (e.g., TypeScript, PowerShell), with a focus on extending custom performance testing automation * Strong experience integrating robust test strategies into CI/CD workflows with automated reporting and notification pipelines * Excellent communication skills in business English (B2\+ level or higher), with an ability to convey technical insights to senior leadership and non\-technical audiences **Nice to have** * Proven experience using Prometheus for advanced performance monitoring and proactive alerting * Expertise in performance testing and optimization for both REST and SOAP\-based service architectures * Strong hands\-on expertise with sitespeed.io for enterprise\-level performance insights and reporting **We offer** * Improved medical coverage \- EPAMers are eligible to participate in a supplementary health insurance program that shall have the usual coverage in the industry, with the Company funding 100% of the value of the monthly premium for participation * Lunch Allowance \- You will receive a daily allowance of CLP $ 7,000 per working day. Enjoy a nice meal on us * Allowance for internet and electricity \- You will receive an allowance of CLP $15,000 per month to cover internet and electricity expense * National Holiday Bonus \- We celebrate joining the Chilean Market. That is why all our employees will receive a bonus of CLP $86,646 in September * Christmas Bonus \- You will receive an End of Year bonus of CLP $170,539\. It will be paid during the month of December, to ensure you have a Happy Holiday! * Learning Culture \- We want you to be the best version of yourself, that is why we offer unlimited access to learning platforms, a wide range of internal courses, and all the knowledge you need to grow professionally * Additional Income \- Besides your regular salary, you will also have the chance to earn extra income by referring talent, being a technical interviewer, and many more ways * Are you open to relocation? \- If you want to relocate to another country and we have the right project, we will assist you every step of the way, to help you and your family, reach your new home