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.

• 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

• 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
  

• 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.

• 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

We are an equal opportunity employer and value a diverse, inclusive workplace. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, gender identity or expression, age, marital or veteran status, pregnancy, disability, or any other protected characteristic. We are committed to providing reasonable accommodations throughout the application and employment process.

Under no circumstances will Antithesis pay a fee for candidates submitted or presented without a signed recruiting agreement in place between Antithesis and the recruiter or agency prior to submission. Any submission must be for a requisition specifically and individually assigned in writing by Antithesis’ People Department.

In the event that candidate(s) are submitted or presented to Antithesis by a recruiter or agency without both a signed agreement and written assignment from Antithesis, Antithesis expressly reserves the right to pursue and hire such candidate(s) without any financial obligation to the recruiter or agency.