Frontend Engineer, Review Tooling

Reinforced Learning; Buffalo (NY); On-site; USD 120,000 - 150,000; Full time

Job summary

Reinforced Learning in New York, NY seeks a frontend engineer to build fast, dense interfaces for reviewing trajectories, diffs, and rubrics. You will own keyboard-first workflows and optimize performance for large content, while contributing to a shared component library used across tools.

You will collaborate with quality and research teams, focusing on user-centered design and precise UI to support reviewers and editors in complex review tasks.

Qualifications

• Three or more years of frontend engineering with React and TypeScript.
• Strong sense for information density and interaction design.
• Performance work on complex interfaces.
• You like watching users work.

Responsibilities

• Review interfaces for code, documents, conversations and agent trajectories.
• Keyboard-first workflows, with time-per-review and agreement rates measured.
• Rendering of large, structured content without lag.
• What reviewers need to see to grade well, worked out with quality and research.
• A shared component library across our tools.

Skills

React

TypeScript

Frontend engineering

Information density

Job description

The role

Reviewers compare trajectories, read diffs, grade against rubrics and adjudicate disagreements for hours at a time. The interface determines how accurate they are. You’ll build it to be fast, dense and kind to attention.

What you’ll own

• Review interfaces for code, documents, conversations and agent trajectories.
• Keyboard-first workflows, with time-per-review and agreement rates measured.
• Rendering of large, structured content without lag.
• What reviewers need to see to grade well, worked out with quality and research.
• A shared component library across our tools.

What you bring

• Three or more years of frontend engineering with React and TypeScript.
• A strong sense for information density and interaction design.
• Performance work on complex interfaces.
• You like watching users work.

Helpful, not required

• Diff viewers, editors or annotation tools.
• Accessibility expertise.