Darum lohnt es sich
Ideal Qualifications
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3+ years of professional full-stack engineering, having personally shipped and operated web applications
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Fluency in at least one modern frontend framework and one backend runtime, with working comfort across several
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Hands-on experience implementing auth, permissions, payment flows, and file upload in production, and knowing where each one usually breaks
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Ability to specify a system precisely in writing: the specification and its criteria are the product
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Comfort with Docker, git at commit level, and command-line tooling
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Prior experience building evaluations, benchmarks, or test suites for AI systems is a strong plus Role Overview
Mercor is seeking experienced full-stack engineers to work on an exciting opportunity to advance the frontier of AI.
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Key Responsibilities
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Write product specifications precise enough that a competent engineer could build the application, and unambiguous enough to grade automatically
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Build a complete reference implementation of each specification that passes every criterion you have written
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Author browser-driven acceptance criteria that verify real user-visible behavior, not implementation details
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Calibrate task difficulty by running frontier models against your task and tuning until it lands in the target band
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Verify each task fails cleanly against an empty repository, so no criterion can be satisfied without genuinely building the feature
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