UI Engineer | Frontend Developer

Antithesis is looking for an in-office employee to help improve and maintain our marketing, documentation and product websites / webapps. As a UI Engineer, you will work closely with the Product Design Director to deliver features requested by the marketing department, documentation creators and product users.

Requirements

• Experience implementing design mocks in HTML, CSS, and JavaScript
• Experience building static websites
• Understanding of how the internet and browsers work
• At least 4 years of experience improving and maintaining websites
• Great attention to detail
• A portfolio website or a list of links to projects you’ve worked on

Bonus points

• Experience with different build tools
• Experience with testing libraries like Playwright
• Experience building SPAs with a frontend framework (React, Vue, Svelte, Solid, etc.)
• Experience in back-end development (Node.js, Python, PHP, etc.)
• Experience with Terraform
• Experience creating and shipping a software package (e.g., an npm library)
• Experience optimizing web pages for performance
• Search engine optimization (SEO) experience
• Advanced CSS/JS skills (e.g., 3D, WebGL, visual effects)
• Experience creating, scaling, and supporting design systems

Possible contributions

Months 1–3

• Get up to speed with the Antithesis marketing and documentation websites by making small improvements and fixing bugs.
• Implement a block on the marketing website based on provided Figma designs.
• Build a new feature for the documentation website.
• Take a full Figma mock and implement an entire marketing webpage, adding subtle and engaging effects.
• Develop a small interactive game for the marketing website to drive engagement.
• Refactor the websites to support a light theme option.
• Update the footer and header across marketing and documentation sites to match the new design.
• Configure a website analytics dashboard (PostHog) to answer key marketing questions.
• Develop a custom forms component to replace third‑party form widgets, ensuring consistent design and flexibility.

Months 3–6

• Implement a new component for the product design system
• Build a new multi-page website section
• Develop an interactive tutorial to illustrate key Antithesis concepts
• Learn, apply, and improve testing for the marketing and documentation websites
• Refine and enhance marketing automations
• Implement a new product view based on provided mocks and product brief