Software Engineer, TypeScript

Stellenbeschreibung:

Build difficult codebase-exploration tasks involving production TypeScript and JavaScript repositories
Select tasks from a pre-validated pool of pinned TypeScript repositories with engineering questions, rubrics, foils, and golden solutions
Explore repositories and relevant pull-request or issue history to understand subsystems
Rewrite questions to challenge frontier coding agents while remaining well-defined and answerable
Adjust rubrics and foils to reward correct reasoning and reject plausible-but-wrong answers
Run the full validation loop in Mercor Studio — Check, Golden, Run, Analyze — and iterate until all stages pass
Document work in task READMEs and submit tasks for expert review
Address reviewer feedback on returned tasks
Complete work in Mercor Studio with time tracked by Insightful and access provisioned through Okta
Work is reviewed by a second engineer and a super reviewer before acceptance

Requirements

3+ years of professional software engineering experience
Substantial production TypeScript experience
Ability to navigate large, unfamiliar TypeScript monorepos and explain runtime behavior
Fluency in advanced type systems, module resolution, bundlers and transpilers, and Node and browser runtimes
Comfort reading compiler and plugin internals
Experience with developer tooling, compilers, test frameworks, GraphQL servers, or state machines highly relevant
Precise written English
Comfortable with git at commit level, containerized environments, and command-line tooling
Must complete identity verification, background check, signed Terms of Work and CIIAA, tax form, and short calibration quiz before task access
Qualified applicants may be asked to complete a brief technical assessment or provide additional information

Core Competencies

Demonstrates extensive experience in TypeScript and JavaScript, with a strong ability to navigate and manipulate large codebases. Proficient in developer tooling, advanced type systems, and effective documentation practices.