Senior Quality Engineer

Overview

Performance Testing Engineer (AI) role owning performance engineering for an assigned portfolio of applications and AI systems, as JLL rolls out AI agents and LLM-powered applications across the business.

What you'll do

• Design and run performance, load, stress, soak, and scalability tests for applications, APIs, and data pipelines, in close partnership with developers and business SMEs.
• Performance-test AI systems (LLM gateway, shared RAG services, MCP servers, and agents), measuring time to first token, end-to-end latency, throughput, concurrency limits, rate-limit behavior, and token cost per transaction.
• Build AI-assisted test automation: use LLMs and agents to generate scripts, create realistic synthetic workloads and data, triage results, and draft reports.
• Integrate performance tests into CI/CD pipelines with SLO-based thresholds and gates so regressions are caught before release.
• Instrument and monitor systems with observability tooling, diagnose bottlenecks across the application, database, network, and infrastructure layers, and recommend fixes.
• Build evaluation harnesses that track AI output quality alongside performance, so speed and cost optimizations do not quietly degrade answers.
• Run workshops with engineering and business teams on performance testing practices and on using tools like Claude Code in testing workflows.
• Feed benchmarks, patterns, anti-patterns, and platform gaps back into the Center of Excellence so the next engagement moves faster.

What you'll need

• Hands-on performance testing of production systems using tools such as JMeter, k6, Gatling, or Locust.
• Production-quality code in at least one of Python, JavaScript/Node, or Java/.NET, enough to build custom load generators and test automation.
• Experience with observability and APM tools (such as Datadog, Dynatrace, New Relic, Grafana, or Azure Monitor) and with analyzing metrics, traces, and logs to find root causes.
• Working knowledge of cloud infrastructure (Azure or AWS) and containers, and of how relational, NoSQL, and vector data stores behave under load.
• Used AI tools or LLM APIs in real engineering or testing workflows, with a grounded understanding of how LLM systems behave under load: token limits, rate limiting, streaming, caching, and concurrency.
• Strong written and verbal communication; able to explain results and risk to non-engineers.
• Pragmatic judgment on what to test, how deep to go, and when results are good enough to ship.
• Systems thinking with a focus on failure modes; AI helps write the tests, you own the results.
• Comfort running multiple agents and automations in parallel as part of daily workflow.

Details

• Location: On-site, Bengaluru, KA.
• Employment type: Full-Time.
• Scheduled weekly hours: 40.