Frontend Engineer — UI Architect & Task Verifier

Crossing Hurdles; United Kingdom; On-site; GBP 60,000 - 90,000; Full time

Job summary

Crossing Hurdles is seeking a frontend engineer to design and validate visual interface tasks. You will craft multi-step coding challenges based on screenshots and diagrams, and specify expected behavior and success criteria.

You will provide reference implementations, review submissions for technical accuracy, and help ensure tasks are measurable and unambiguous, with clear verification steps. Strong English communication is essential.

Qualifications

• Strong frontend engineering skills with React, TypeScript, or similar technologies.
• Experience shipping complex interfaces and interactions.
• Ability to read, modify, debug, and validate real application code.

Responsibilities

• Design multi-step coding tasks grounded in visual material such as screenshots, UI mockups, and diagrams.
• Specify code and artifacts involved in tasks and define expected behavior.
• Define objective success criteria for task verification.
• Provide a working reference implementation for tasks.
• Review tasks built by other contributors for technical accuracy and verifiability.

Skills

Frontend engineering

React

TypeScript

UI/UX design

Debugging

Tools

GitHub

Job description

Crossing Hurdles is seeking a frontend engineer to design and validate visual interface tasks. You will craft multi-step coding challenges based on screenshots and diagrams, and specify expected behavior and success criteria.

You will provide reference implementations, review submissions for technical accuracy, and help ensure tasks are measurable and unambiguous, with clear verification steps. Strong English communication is essential.