Senior Frontend Engineer – Engine

Jobtailor; New York (NY); On-site; USD 180,000 - 220,000; Full time

Job summary

Jobtailor in New York seeks a principal engineer to lead full-stack frontend-leaning systems and drive AI-assisted development with an emphasis on quality and tests. You will shape architecture, mentor engineers, and partner with product/design to deliver reliable software in a fast-moving environment.

The role requires 8+ years building production web apps, expert TypeScript/React, Next.js, and a deep understanding of functional programming and testing.

Qualifications

• Bachelor's degrees in CS or Engineering or equivalent experience.
• 8+ years building production web applications; 1+ year as principal engineer.
• Expert TypeScript, React, Next.js; strong functional programming and testing practices.
• Ability to articulate trade-offs and drive technical direction with stakeholders.
• Proven leadership through mentoring, delegation, and code reviews.
• Experience with AI-assisted development and modern coding models.

Responsibilities

• Take Ownership: uphold quality through design reviews, code reviews, test strategy, and production readiness.
• Collaborate cross-functionally with product and design to shape solutions and tradeoffs.
• Architect for change with full-stack, frontend-leaning, small and composable systems.
• Improve performance & quality via automated testing and architectural discipline.
• Lead AI-assisted development, validate rigorously with tests and edge-case reviews.
• Provide technical leadership through mentorship and high-quality code reviews.

Skills

TypeScript Proficiency

React Development

Next.js

Functional Programming

Automated Testing

Component-Driven Development

Performance Optimization

Code Review

System Architecture

Production Web Applications

Education

Bachelor’s Degree in Computer Science

Bachelor’s Degree in Engineering

Tools

Cursor

AI-Augmented IDEs

CI/CD Tools

Testing Frameworks

Version Control Systems

Job description

• Take Ownership: You’ll be accountable for upholding a high bar for quality through design reviews, code reviews, test strategy, and production readiness.


• Collaborate cross-functionally: Partner with product, design, and fellow engineers to shape solutions, clarify tradeoffs, and deliver reliably.


• Architect for change: Design and build full-stack, frontend-leaning systems that are intentionally small, composable, and resilient to evolving product requirements.


• Improve Performance & Quality: Enforce architectural and operational quality, catching subtle issues that are easy to miss in fast-moving, AI-assisted development.


• Champion Functional Patterns: Champion functional programming principles and immutability to reduce side effects and make systems simpler to reason through and debug.


• Lead AI-assisted development: You’ll use AI assistants/agents for prototyping, scaffolding, refactoring, and exploratory development, then harden the result and rigorously validate through tests, reasoning, and edge-case review.


• Raise quality through testing: Build and maintain a strong automated test suite of unit, integration/contract, component/UI, and end-to-end coverage, with fast feedback loops in CI.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related field


• 8+ years of experience building production web applications and 1+ years as a principal engineer


• Expert-level proficiency with TypeScript, strong experience with React, server-side rendered Next.js (or similar), and performant component-driven development (e.g. Reshaped UI)


• Ability to articulate complex technical trade-offs to stakeholders and translate product vision into high-fidelity technical direction


• Demonstrated development of simple, reusable, changeable systems (with examples of refactors, platforming work, or scalable patterns)


• Preference for functional programming and a deep understanding of why immutability is critical in modern frontend development


• Advanced knowledge of the testing pyramid and how to use automated tests as a safety net for rapid, iterative development


• Proven technical leadership through mentorship, delegation, and high-quality code reviews


• Hands-on experience with tools like Cursor (or equivalent AI-augmented IDEs) and all modern coding models


• Practical understanding of where AI is strong vs. where it falls short, paired with sound discernment in its application


• Ability to use AI agents to quickly project multiple approaches, compare tradeoffs, and converge on the best solution without shipping “AI-shaped” code.

Core Competencies

Demonstrates expertise in Full-Stack Development with a focus on TypeScript and React, while applying Functional Programming principles to create scalable and maintainable systems. Proven ability to lead AI-assisted development and implement robust testing strategies to ensure high-quality software delivery.

Highest-signal resume keywords

• TypeScript Proficiency


• React Development


• Functional Programming


• Automated Testing Strategies


• Technical Leadership

ATS Optimization Keywords

Hard Skills

• TypeScript


• React


• Next.js


• Functional Programming


• Automated Testing


• Component-Driven Development


• Performance Optimization


• Code Review


• System Architecture


• Production Web Applications

Soft Skills

• Collaboration


• Mentorship


• Communication


• Problem-Solving


• Stakeholder Engagement

Certifications & Qualifications

• Bachelor’s Degree in Computer Science


• Bachelor’s Degree in Engineering

Industry Keywords

• Web Applications


• AI-Assisted Development


• Quality Assurance


• Software Engineering


• Scalable Systems

Tools & Technologies

• Cursor


• AI-Augmented IDEs


• CI/CD Tools


• Testing Frameworks


• Version Control Systems