Senior Frontend Engineer — AI-Driven, Contractor

First Focus; Auckland; On-site; NZD 120,000 - 160,000; Full time

Job summary

First Focus in Auckland is seeking an experienced Senior Frontend Software Engineer who combines strong TypeScript and frontend development skills with a passion for agentic AI. You’ll design solutions, guide AI agents, and ensure the product is secure, maintainable and production-ready.

This 12-month independent contractor engagement focuses on frontend applications, reusable UI components, and collaboration with UX/UI designers.

Qualifications

• Strong experience building production frontend applications using TypeScript and JavaScript.
• Excellent understanding of component-based architecture, reusable UI libraries and design systems.
• Experience with application state, APIs, asynchronous programming, performance and accessibility.
• Sound engineering judgement around architecture, security and maintainability.
• Practical experience using AI coding agents in real development projects.
• Ability to guide AI agents with clear tasks, context, constraints and validation.
• Strong testing, debugging, code review, version control and CI/CD skills.
• Ability to work independently, communicate clearly and deliver quality outcomes.

Responsibilities

• Design and build modern, responsive frontend applications using TypeScript.
• Create reusable UI components and shared design systems alongside our UX/UI designer.
• Turn design specifications into accessible, production-ready user experiences.
• Own features from technical design through development, testing and deployment.
• Use AI coding agents for development, debugging, testing, refactoring and documentation.
• Break complex work into clear tasks that AI agents can execute and validate.
• Develop practical AI workflows, including agent instructions, context management and code reviews.
• Review AI-generated code for quality, security, performance and maintainability.

Skills

TypeScript

Frontend development

UI components

Design systems

Tools

React

CI/CD

Job description

First Focus in Auckland is seeking an experienced Senior Frontend Software Engineer who combines strong TypeScript and frontend development skills with a passion for agentic AI. You’ll design solutions, guide AI agents, and ensure the product is secure, maintainable and production-ready.

This 12-month independent contractor engagement focuses on frontend applications, reusable UI components, and collaboration with UX/UI designers.