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