Senior Frontend Developer

Senior Frontend Developer (Part-time; 100% remote) 

• Salary: up to around $40 per hour
• 100% Remote
• Part-time: Around 10h per week, up to 10-15h/week, as needed
• B2B contract/freelance

We are seeking a Senior Front-End Developer to work on the ongoing improvement, maintenance, and optimization of our extensive public-facing website. The role is focused on working with an existing, production-grade codebase built primarily with HTML, CSS, JavaScript, PHP and WordPress, under CloudFlare.

Requirements

• Expert-level experience in front-end development, with a strong track record of working on long-lived or legacy codebases
• Website performance optimization experience, web performance tooling and audits (e.g., Lighthouse, Google PageSpeed insights) experience.
• Ability to work independently (along with a work history of independent work)
• Excellent knowledge of JavaScript, HTML and CSS, with a clear understanding of responsive design principles
• Basic understanding of SEO fundamentals, including performance factors, and search-engine-friendly markup
• Experience working with extensive and legacy frontend systems
• Strong attention to detail and a quality-focused mindset

Main Responsibilities

• Optimize page load times and overall website performance using front-end techniques.
• Working on bugfixes and optimization of a legacy front-end website built with JavaScript, HTML, CSS, and WordPress, ensuring performance, and stability.
• Improve existing features and user-facing functionality through thoughtful, incremental enhancements rather than full rewrites.
• Collaborate with internal developers, designers, management, and content teams to implement updates and refinements to existing pages and components.
• Ensure cross-browser compatibility across the website.
• Apply front-end SEO best practices, including performance optimization (most importantly), accessibility improvements, page structure, and Core Web Vitals.