Senior Performance Engineer

We are looking for a Senior Performance Engineer to define, implement, and execute the performance engineering strategy for our applications and supporting services. This position will be essential for validating Non-Functional Requirements (NFRs), such as response time, throughput, scalability, stability, and resource utilization.

The engineer will collaborate closely with development, DevSecOps, architecture, and product teams to detect performance risks early, build automated performance testing capabilities, analyze system behavior under realistic workloads, and confirm applications achieve agreed performance and scalability targets prior to production release.

Responsibilities

• Define the overall performance testing and engineering strategy based on application architecture, business usage patterns, and NFRs
• Translate business and technical NFRs into measurable performance acceptance criteria, test scenarios, workload models, and success thresholds
• Design and run load, stress, spike, endurance/soak, scalability, and capacity tests across web applications, APIs, and backend services
• Develop and maintain automated performance test scripts and reusable performance testing frameworks
• Validate the performance of HTTP/REST and gRPC-based APIs and services
• Build realistic workload models based on expected user volumes, concurrency, transaction patterns, and production-like behavior
• Assess performance across the full application stack, including frontend, APIs, services, databases, caching layers, infrastructure, and third-party dependencies
• Detect performance bottlenecks and perform root-cause analysis using application, infrastructure, database, and observability data
• Verify application behavior under normal, peak, and sustained workloads
• Measure key performance indicators such as response time, latency, throughput, error rate, concurrency, CPU, memory, network utilization, and database performance
• Embed performance tests into CI/CD pipelines to enable continuous performance validation and catch regressions early
• Create performance baselines and monitor performance trends across releases
• Collaborate with software engineers and DevSecOps teams to recommend and validate performance optimizations
• Deliver clear performance test reports, highlight risks, and communicate whether agreed NFRs and release criteria have been met
• Assist with capacity planning and provide recommendations for application and AWS infrastructure scalability

Requirements

• 3+ years of performance testing/performance engineering experience with production web applications and distributed systems
• Proficiency in performance testing tools such as k6, JMeter, and Gatling
• Familiarity with Locust or similar load testing tools
• Strong understanding of load, stress, and spike testing
• Expertise in endurance/soak, scalability, and capacity testing
• English proficiency at an Upper-Intermediate level (B2) or higher

Benefits

• International projects with top brands
• Work with global teams of highly skilled, diverse peers
• Healthcare benefits
• Employee financial programs
• Paid time off and sick leave
• Upskilling, reskilling and certification courses
• Unlimited access to the LinkedIn Learning library and 22,000+ courses
• Global career opportunities
• Volunteer and community involvement opportunities
• EPAM Employee Groups
• Award-winning culture recognized by Glassdoor, Newsweek and LinkedIn