Mercor
Expert projects for AI labs across software, finance, law, medicine, science and languages.
Pay figures cover the 291 open jobs that publish an hourly rate in USD. They are published rates, not a guarantee of income. Last checked on October 8, 2026.
You apply on work.mercor.com: create a profile, complete a skills assessment, then get matched to projects that fit your background.
Official site: mercor.com. SideHustler is independent of Mercor.
This role involves contributing to AI model safety as a bilingual English-Ukrainian expert. You will evaluate how these models handle sensitive topics in Ukrainian, by writing expert prompts and classifying conversations according to structured guidelines. No prior experience in AI or machine learning is required.
Posted September 4, 2026
You will be hired as a native speaker of Brazilian Portuguese to interact by voice with a next-generation AI assistant and evaluate its responses. You will compose messages, emails and notes via common applications, then rate the quality of the AI interactions in your language.
Posted September 4, 2026
You will lead the complete sales cycle for major accounts, from prospecting to signature, by driving complex negotiations and building value propositions with C-suite and technical decision-makers. The role requires expertise in Enterprise B2B sales with a portfolio of high-value clients and the ability to manage multi-year agreements of significant value.
Posted September 3, 2026
This role involves evaluating and annotating clinical documents as well as notes generated by medical AI systems, applying your expertise in coding and clinical documentation. You will participate in a multilingual team responsible for ensuring the accuracy and reliability of AI tools in healthcare settings. The ideal candidate must possess recognized medical certification and be proficient in English as well as at least one other language at an advanced level.
Posted September 3, 2026
This role is for practicing inpatient hospitalist physicians to evaluate and annotate clinical documentation generated by medical AI systems. You will review patient records, identify gaps and inaccuracies in notes produced by AI, and provide structured feedback to engineering teams. The role requires advanced proficiency in at least one language other than English.
Posted September 2, 2026
You are a general practitioner or internist currently practicing in an outpatient setting and proficient in English plus another language at an advanced level. You annotate and evaluate clinical notes generated by AI, flagging omissions and inaccuracies to improve clinical decision support tools. This remote and part-time role allows you to leverage your expertise in medical documentation with a specialized AI health product team.
Posted September 2, 2026
This role involves checking Japanese-language document pages, dividing each page into labelled regions with a reading order, and transcribing their text exactly in Japanese script. It suits native Japanese speakers with professional experience in transcription, editing, translation or similar document-heavy work, who can handle vertical text, dense layouts and handwriting. The output forms training data for document AI systems.
Posted September 2, 2026
This role involves annotating and transcribing PDF pages in Malayalam, identifying document structures and accurately reproducing text in the original script. It is intended for native Malayalam speakers who have mastery of writing and diacritics, and who have experience in annotation, transcription or document revision.
Posted September 2, 2026
This role involves annotating and transcribing PDF pages in Telugu, identifying each content region, establishing reading order, and accurately reproducing handwritten or printed texts. The position is designed for native Telugu speakers with complete mastery of the script and its diacritics, to build training data for computer vision and document processing models.
Posted September 2, 2026
This role is for experienced pediatric nurses with acute care expertise. You will evaluate outputs generated by AI systems from real clinical documentation, annotate pediatric nursing assessment data, and provide expert feedback to improve the reliability and safety of medical AI tools. The role combines your field experience in pediatrics with a direct contribution to developing clinically robust algorithms.
Posted September 1, 2026
This role involves designing realistic evaluation challenges for AI models applied to drug discovery. As an expert in chemistry and molecular biology, you will build complex research scenarios based on real and ambiguous data, where AI must demonstrate genuine reasoning capability rather than simple pattern association. You will be responsible for the entire process: challenge design, data corpus assembly, response evaluation, and iterative revision.
Posted August 31, 2026
This evaluation role involves designing simulations and technical specifications to test the ability of advanced AI models to reason from first principles in your area of expertise in engineering. You will define complex design problems (controllers, circuits, geometries) that the AI must solve by demonstrating reasoning capability rather than simple data retrieval.
Posted August 31, 2026
Short-term role enabling experienced electrical engineers to analyze, evaluate, and solve complex electrical design and systems engineering problems across various applications. The specialist will develop electrical designs based on technical requirements, review power distribution and systems, and validate designs against industry standards. This role is suited for professionals with hands-on experience in industrial electrical systems or infrastructure design.
Posted August 29, 2026
Lead electrical test automation projects for complex hardware systems and components. This role calls upon your expertise in instrumentation, hardware validation and automated test procedure design. It is intended for experienced electrical engineers who know how to design and execute sophisticated test benches.
Posted August 29, 2026
This role calls on radio frequency and electromagnetic engineering experts to work on a short-term project. You will analyze and resolve complex technical problems involving RF systems, electromagnetism, antennas, and wave propagation. The ideal profile has solid applied industrial experience in these fields.
Posted August 29, 2026
You will evaluate the quality and correctness of AI-assisted software development traces used to train and assess models at a leading AI laboratory. You must judge the accuracy of coding sessions, the consistency of workflows, and the quality of reasoning, then provide structured written feedback according to an evaluation grid.
Posted August 28, 2026
You will assess the quality and architectural robustness of serverless AWS tasks and infrastructure-as-code designed for AI model training. Your role consists of analyzing multi-service designs, verifying the fidelity of infrastructure code, and providing detailed feedback based on evaluation grids. This profile is aimed at cloud engineers with solid practical experience in AWS serverless services.
Posted August 28, 2026
This job involves evaluating the quality and compliance of Kubernetes scenarios for AI model training. You will analyze manifests, diagnose cluster failures, and provide structured feedback according to an evaluation grid, as a DevOps expert or platform engineer.
Posted August 28, 2026
This role involves designing realistic scenarios for life insurance and annuity advice and underwriting, then evaluating an AI model's responses against industry standards. You must have solid professional experience in life insurance or investment advisory, and be able to provide detailed feedback to improve the AI's reasoning on mortality risk and product suitability.
Posted August 28, 2026
You will evaluate the methodological quality and scientific rigor of machine learning tasks designed to train and test models at a cutting-edge AI laboratory. You will provide structured feedback on experimental design, model selection and evaluation protocols, critiquing claims against observed results.
Posted August 28, 2026
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FAQ
305 Mercor jobs are open on SideHustler today. 10 were posted in the last 7 days. Listings are rechecked against the official postings: the latest check on this list was on October 8, 2026.
Among the 291 open roles that publish an hourly rate in USD, pay runs from $10 to $380 per hour, with a median of $75. These are the rates the platforms publish, not a guarantee of income or hours.
The most requested areas of expertise on these listings are AI Evaluation, Red Teaming, Adversarial Testing, Multilingual Expertise, Vulnerability Assessment. Each listing states its own requirements.
You apply on work.mercor.com: create a profile, complete a skills assessment, then get matched to projects that fit your background.
It depends on the job. 301 of the 305 open Mercor jobs publish the countries they accept, and each listing shows them. The others do not publish a country list.
No. SideHustler is independent of Mercor. We list its public postings and send you to the official one to apply. When an Apply link is a referral link, it is marked as such.
Apply now opens the official posting on the platform, where you complete the application. You need no account on SideHustler. To see which roles fit your background first, add your resume and every open job is scored against your profile.