Principal Performance Engineer - Full Stack Development

About the Role :

We are looking for a Principal-Level Performance Engineer to lead cross-stack performance initiatives in our complex enterprise application landscape. In this role, you will take ownership of monitoring, analyzing, and resolving system-wide performance bottlenecks, including APIs, databases, frontend, and infrastructure layers. 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 :

- Lead cross-stack performance engineering across APIs, databases, frontend, and infrastructure.

- Diagnose live production issues using APM tools (New Relic, Dynatrace, Kibana) and resolve recurring bottlenecks (deadlocks, blocking queries, async pitfalls, rendering slowdowns).

- Own the performance backlog define KPIs, build dashboards, track progress, and ensure closure across sprints.

- Collaborate cross-functionally with backend, frontend, DBA, QA, and SRE teams to drive systemic improvements.

- Review and influence architecture conduct deep-dives on APIs, propose async pipelines, caching strategies, and scalable design patterns.

- Mentor and coach engineers on instrumentation, trace analysis, and performance best practices.

- Champion performance culture ensure performance is part of Definition of Done, lead knowledge-sharing, and introduce AI-assisted performance tools.

Required Qualifications :

- 7+ years as a full-stack engineer with strong backend + systems depth.

- Expertise in .NET, Node.js, SQL optimization, scalable API development.

- Hands-on experience with APM tools (New Relic, AppDynamics, Dynatrace, Kibana).

- Solid knowledge of database optimization, async pipelines, concurrency handling.

- Strong collaboration and communication skills to influence cross-functional teams.

Preferred Experience :

- Experience in a large, complex SaaS or enterprise environment.

- Familiarity with :

1. Caching strategies (Redis, CDN)

2. CI/CD workflows (GitHub, Jenkins)

3. Jira and Confluence for issue tracking and documentation

- Exposure to frontend performance issues (lazy loading, bundle optimization)

Tech Stack Youll 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