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Principal Fullstack Engineer

Job in New York City, Richmond County, New York, USA
Listing for: Harnham
Full Time position
Listed on 2026-06-02
Job specializations:
  • Software Development
    Full Stack Developer, Software Engineer, Cloud Engineer - Software
Salary/Wage Range or Industry Benchmark: 175000 - 190000 USD Yearly USD 175000.00 190000.00 YEAR
Job Description & How to Apply Below
Principal Fullstack Engineer
Location: New York City (Hybrid)
Pay: $175k - $190k Base + bonus & equity

Overview
This is a senior most individual contributor role within a fast-growing engineering organisation operating at massive scale in the consumer technology and security space. The company serves tens of millions of users annually and processes hundreds of thousands of realtime events per second across its platforms.
The role sits within a newly expanded NYC engineering hub following a recent acquisition and plays a critical part in advancing the company's AIdriven product roadmap. You'll work in a highly empowered, low bureaucracy environment that combines the resources of a large enterprise with the pace and ownership of a startup.

Responsibilities
  • Partner closely with engineering leads and stakeholders to define what to build and how to build it
  • Lead frontend architecture decisions for complex, high traffic applications
  • Drive migration away from legacy systems toward modern, scalable frameworks
  • Build and evolve server rendered applications using TypeScriptbased frameworks
  • Integrate and ope rationalise generative AI capabilities to create more customised software experiences
  • Launch and oversee AI agents used for code generation and review, ensuring quality and reliability
  • Contribute to system design, specifications, and longterm technical direction
  • Collaborate across fullstack teams in a productfocused, customer driven environment
Must Have Qualifications
  • 8+ years of professional software engineering experience
  • Strong Type Script expertise with modern frontend and server side rendering frameworks
  • Fullstack engineering background with strong frontend ownership
  • Experience working with Kubernetes in production environments
  • Bachelor's degree in Computer Science or a related technical field
  • Demonstrated interest or handson experience with AI assisted development
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