Staff Frontend Engineer - JavaScript Tooling & AI DevEx

Meta; Hartford (CT); On-site; USD 184,000 - 257,000; Full time

Job summary

Meta is seeking a Staff Software Engineer to help shape the future of JavaScript tooling and developer infrastructure across Meta's family of products. In this role, you will design and implement JS compiler enhancements, build and improve developer tools such as linters and test runners, and integrate LLM-powered capabilities into developer workflows.

You will drive the architecture and technical direction of JS tooling systems that empower thousands of engineers to build faster, safer, and

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience
• 8+ years of front-end software engineering including JavaScript, HTML, and CSS
• Experience leading major front-end initiatives involving complex system architecture, cross-team coordination, and phased rollouts
• Experience designing and building scalable, performant, and accessible UI systems for products with large user bases
• Experience using data, experimentation frameworks, and telemetry to drive front-end decisions
• Experience communicating technical decisions to both technical and non-technical stakeholders

Responsibilities

• Lead design and implementation of compiler passes and JavaScript transformations that improve code quality, performance, and developer experience
• Build and enhance developer tooling infrastructure including linters, test runners, and code analysis tools
• Integrate LLM-powered capabilities into developer workflows, accelerating code generation, automated fixes, and intelligent tooling assistance
• Drive end-to-end delivery of major JS tooling initiatives, coordinating dependencies across engineering, product, and infrastructure teams
• Identify and resolve complex performance bottlenecks in build systems, bundlers, and JavaScript execution
• Establish and evolve best practices for JavaScript tooling, including AST manipulation, static analysis, and incremental compilation strategies
• Mentor other engineers on compiler design, tooling architecture, and AI-assisted development practices
• Partner with cross-functional stakeholders to independently drive technical decisions and roadmap priorities for developer tools
• Proactively identify and address technical debt in tooling infrastructure, lead migrations to modern standards, and ensure maintainability at scale
• Communicate technical strategy, trade-offs, and roadmap decisions clearly to both engineering and non-engineering audiences, including leadership

Skills

JavaScript

HTML

CSS

Frontend architecture

Cross-team coordination

Mentoring engineers

AI tooling integration

Education

Bachelor's degree in Computer Science/Engineering or related field

Tools

Linters

Test runners

Code analysis tools

AST manipulation

Static analysis

Incremental compilation

LLM integration

Job description

Meta is seeking a Staff Software Engineer to help shape the future of JavaScript tooling and developer infrastructure across Meta's family of products. In this role, you will design and implement JS compiler enhancements, build and improve developer tools such as linters and test runners, and integrate LLM-powered capabilities into developer workflows.

You will drive the architecture and technical direction of JS tooling systems that empower thousands of engineers to build faster, safer, and