Senior Web Developer II — WordPress, API & WCAG Expert

Catalyst Mobility™; United States; On-site; USD 72,000 - 86,000; Full time

Benefits offered by this job

Health benefits

Retirement plan

Paid holidays

Paid vacation

Sick leave

Parental leave

Job summary

Catalyst Mobility, formerly CALSTART, is seeking a Web Developer to support the development, maintenance, and continuous improvement of our websites. You will build pages, implement functionality, troubleshoot issues, and ensure security, accessibility, and performance.

Working with the Marketing Web Team, you will collaborate with designers, program teams, and external partners to deliver high‑impact digital experiences that advance our mission of decarbonizing transportation.

Qualifications

• Bachelor's degree in computer science, web development, or a related field, or equivalent professional experience.
• Five or more years of professional web development experience, including experience developing and maintaining WordPress websites.
• Strong proficiency in HTML5, CSS3, responsive design, modern JavaScript, and building or modifying WordPress themes, templates, blocks, plugins, or custom functionality.
• Working knowledge of PHP, MySQL, REST APIs, third-party web services, and Git-based development workflows.
• Experience applying web accessibility standards, preferably WCAG 2.1 or newer, along with an understanding of website security, privacy, performance optimization, cross-browser compatibility, and testing practices.
• Ability to independently troubleshoot issues across front-end, back-end, CMS, database, integration, and hosting environments.
• Strong organizational and project administration skills, with the ability to manage multiple assignments across a portfolio of websites.
• Strong communication, collaboration, accountability, adaptability, and problem-solving skills, including the ability to explain technical information to non-technical stakeholders.

Responsibilities

• Develop, maintain, and enhance websites and web apps using WordPress, PHP, HTML, CSS, JavaScript, and MySQL.
• Manage assigned web properties, including maintenance, troubleshooting, testing, deployments, and post-launch support.
• Build and modify WordPress themes, templates, blocks, plugins, and custom functionality.
• Translate designs into responsive, accessible experiences meeting WCAG 2.2 AA.
• Support launches, redesigns, migrations, integrations, including upcoming rebrand.
• Develop and maintain integrations with REST APIs, forms, analytics, CRM systems (Salesforce) and other services.
• Collaborate with the Senior Web Developer, designers, Marketing, IT, program teams, and stakeholders.
• Monitor and improve site performance, security, accessibility, uptime, and Core Web Vitals.
• Maintain technical documentation and contribute to development standards and workflows.

Skills

WordPress development

HTML/CSS/JavaScript

Web accessibility (WCAG)

REST APIs

Git version control

Troubleshooting

Project management

Cross-functional collaboration

Education

Bachelor's degree in computer science or related field

Tools

WordPress

PHP

MySQL

REST APIs

Git

Hosting platforms

Job description

Catalyst Mobility, formerly CALSTART, is seeking a Web Developer to support the development, maintenance, and continuous improvement of our websites. You will build pages, implement functionality, troubleshoot issues, and ensure security, accessibility, and performance.

Working with the Marketing Web Team, you will collaborate with designers, program teams, and external partners to deliver high‑impact digital experiences that advance our mission of decarbonizing transportation.