Function-based Code Annotator

Rex focuses on cognition-heavy work: reasoning evaluation, prompt design, domain-specific content generation, and model benchmarking. Instead of high-volume microtask queues, it prioritizes fewer, deeper tasks and pays accordingly, with a stated target of $25-45/hr for expert-level output.

It's Rex's reputation system: a running score of your reliability, consistency, and task quality. A stronger profile unlocks higher-paying tracks and priority access to premium projects like Project EVA (with 2077AI), so every task you complete affects what you get offered next.

RLHF and instruction-tuning dataset creation, LLM prompt and response evaluation, named entity recognition, computer vision annotation, content safety labeling, speech-to-text transcription, and red-teaming and safety evaluations. Your specific assignment depends on your skills and profile tier.

No. Instead of client deliverables, you're given complex scenarios to evaluate: grading the AI's logic, correcting its hallucinations, and supplying expert-level reasoning it doesn't have on its own. The job is closer to teaching than consulting.

Because general knowledge isn't what's being tested. The model already knows the basics; what it needs is expertise on edge cases, the rare, difficult, highly technical judgment calls only a senior professional in the field would make correctly.

Slow and deep, not fast and repetitive. A single task can take 45-60 minutes of researching citations or verifying complex calculations. Quality is what's being measured here, not throughput.

Tasks here are scoped to Software Engineering, not generic labeling. As a Function-based Code Annotator, expect to draw on real domain judgment (evaluating outputs, correcting errors, or providing expert reasoning specific to Software Engineering) rather than following a one-size-fits-all rubric. If you don't have hands-on Software Engineering background, this is likely not the right listing to start with.

Yes. This role specifically requires Chinese or English proficiency. You will likely be evaluated on written fluency during the assessment, not just conversational level. If Chinese is not your first language or you are not professionally fluent, this is not the right role. Filter for your native language to find better-matched listings.

You'll be taken to Rex's external site to complete your application there. This listing links through a referral, but the process is identical to applying directly; the link just routes you correctly. Create an account on their site and follow their onboarding steps.

This specific role is restricted to China. If you are outside these locations, applying is unlikely to result in an offer even if you pass the assessment. Check the full job description for any VPN or tax-residency caveats.

Rex is the contractor brand of Remo, a remote work infrastructure company, acting as employer of record for AI training contracts on behalf of large AI labs and data companies. Your contract is formally with Remo, not the end client.