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. *We accept* *CVs in English only.* **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** * 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 * Health Coverage \- Health and wellness are important, that is why we have you and up to four family members in a premiere health plan. We have a couple of options, so you can choose what is best for you and your family * Visual Benefit \- Seeing your work for us would be a sight for sore eyes. We want your vision to always be at 100% which is why we offer up to $200\.000 COP for any visual health expenses * Life Insurance Plan \- We have partnered with MetLife to offer a full\-coverage Ife insurance plan. So, your family is covered, even if you are gone. * Medical Leave Coverage \- We are one of the few companies that cover 100% of your medical leave, for up to 90 days. Your health is the most important thing to us * Professional Growth Opportunities \- We have designed a highly competitive and complete development process, where you will have all the tools to get where you have always wanted to be, personally and professionally * Stock Option Purchase Plan \- As an EPAMer you can be more than just an employee, you will also have the opportunity to purchase stock at a reduced price and become a part owner of our organization * 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 * Community Benefit \- You will be part of a worldwide community of over 50,000 employees, where you can learn, challenge yourself, stand out, and share your knowledge and experience with multicultural teams! *Please note that even though you are applying for this position, you may be offered other projects to join within EPAM.* EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi\-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting\-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.