Performance Engineer (Frontend Focus)

Performance Engineer (Frontend Focus)

Location: Onsite – New Jersey Client: Capgemini / Comcast Experience: 10+ Years

Role Overview

We are seeking a seasoned Performance Engineer with a strong focus on frontend performance engineering. Experience with SRE principles is highly preferable. The ideal candidate will drive service reliability, optimize frontend performance, and enhance observability across enterprise applications using modern monitoring and profiling tools.

Key Responsibilities

• Ensure high availability and resilience of services, applying SRE practices (SLI/SLO/SLA definitions, error budgets, toil reduction).

• Identify and resolve systemic reliability issues through architectural improvements.

• Develop and enhance observability dashboards using AppDynamics, Grafana, ELK, Splunk, OpenTelemetry.

• Establish performance KPIs, monitor trends, and set proactive alerting mechanisms.

• Implement distributed tracing and fullstack performance visibility.

• Improve frontend performance and Core Web Vitals (LCP, FID, CLS, INP) through network optimization, resource compression, and rendering improvements.

• Conduct endtoend performance analysis across application, database, infrastructure, and cloud layers.

• Perform load, stress, soak, and scalability testing using JMeter, Gatling, K6.

Required Skills

• Strong knowledge of RUM and APM tools – AppDynamics (preferred), New Relic, Datadog.

• Handson experience with Cloud platforms (AWS – ECS/EKS, Lambda, DynamoDB, CloudWatch, API Gateway, ALB; Azure).

• Expertise in SQL/NoSQL databases and caching strategies.

• Solid understanding of Core Web Vitals, browser performance, rendering pipelines, and CDN optimization.

• Proficiency with frontend profiling tools (Lighthouse, Chrome DevTools).

• Strong experience in performance scripting (JMeter, K6, Gatling).

• Dashboarding and monitoring skills with AppDynamics, Quantum Metrics, ELK, Grafana.

Candidate Strengths

• Frontend Performance: Strong

• Performance Tuning: Very Strong

• Load Testing: Very Strong

• Observability: Strong

• SRE Fundamentals: Preferable