Principal Performance Engineer

About the Role

Principal-Level Performance Engineer

The ideal candidate is an all-round full-stack developer with a passion for solving high-impact performance problems and collaborating across multiple engineering teams. You will play a strategic and hands-on role in identifying root causes, guiding improvements, and influencing architectural direction to enhance the speed, stability, and scalability of our platform.

Key Responsibilities

Performance Diagnostics & Triage

• Monitor live production systems using New Relic and Kibana
• Identify slow APIs, trace bottlenecks, and correlate backend, database, or infrastructure issues
• Investigate anomalies like high load averages, long unexplained traces, rendering slowdowns, and memory spikes
• Resolve recurring issues: deadlocks, blocking queries, N+1 calls, async pitfalls, JavaScript and C# runtime errors

Strategy & Prioritization

• Maintain and prioritize a backlog of high-value recurring performance issues
• Define KPIs, build performance dashboards, and track progress across sprints
• Coordinate across teams to assign owners, follow up on fixes, and close the loop on resolutions

Cross-Team Collaboration

• Collaborate with backend, frontend, DBAs, and SRE to diagnose and resolve performance issues
• Work with engineers to interpret New Relic traces and logs effectively
• Align with QA and release teams to monitor regressions and errors post-deployment

Engineering Ownership

• Conduct deep-dive reviews of API and backend code (data access, logging, error handling, security)
• Propose and prototype architectural enhancements, async pipelines, catching strategies.
• Identify and generalize reusable patterns for scalable performance improvements
• Lead refactoring discussions:

Mentorship & Leadership

• Act as the go-to person for performance engineering within the team
• Train and mentor engineers on instrumentation, trace reading, and performance best practices
• Lead the adoption of AI-assisted performance tooling and automation
• Advocate for performance to be part of Definition of Done

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Required Qualifications

• 8+ years of experience

  as a

  full-stack engineer

  with proven backend, database, and systems-level depth
• Strong experience in

  .NET, Node.js, SQL performance tuning

  , and scalable

  API developmen

  t.
• Proficient in analyzing performance using

  New Relic APM, Kibana,

  or similar tools.
• Deep understanding of:- Database optimization (query tuning, indexes, execution plans),Application performance profiling (traces, async calls, concurrency), REST API latency analysis and debugging
• Strong communication and cross-functional collaboration skills

Preferred Experience

• Experience in a large, complex SaaS or enterprise environment
• Familiarity with:
• - Caching strategies (Redis, CDN)
• - CI/CD workflows (GitHub, Jenkins)
• - Jira and Confluence for issue tracking and documentation
• Exposure to frontend performance issues (lazy loading, bundle optimization)

Tech Stack You’ll Work With

• Languages:

  ASP.NET MVC, C#, JavaScript (Node.js)

• Observability

  : New Relic, Kibana (Logz.io

  )
• Database:

  SQL Server

• Cloud/Infra:

  AWS

• Tools:

  Jira, Confluence, Jenkins, GitHub