Senior QA Engineer - Luxoft

Key Responsibilities

• Design and execute performance and load tests for APIs, UI, data pipelines, and LLM calls, ensuring P95/P99 latency and throughput targets.
• Validate system resilience through failover, retry logic, rate limiting, and external dependency failure scenarios involving LLMs and data feeds.
• Identify and analyze bottlenecks across microservices, databases, caching layers, and Kafka streams, recommending architectural improvements.
• Conduct LLM non‑functional validation, assessing latency, fallback mechanisms, prompt robustness, and cost efficiency.
• Collaborate with development and DevOps teams to integrate testing into CI/CD pipelines and monitor performance metrics in production.

Requirements

• 5+ years of QA experience in high‑scale, data‑intensive environments.
• Proficiency with performance testing tools (e.g., JMeter, k6) and load testing frameworks.
• Strong knowledge of Java microservices, React, and Kafka architecture.
• Experience testing OpenAI LLM integrations and evaluating their NFRs.
• Solid understanding of security testing principles and best practices.