The Data & Machine Learning roles open on Mercor today. For the same field across every platform, see all Data & Machine Learning jobs.
Pay figures cover the 41 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 will contribute to training AI models by writing and validating formalized mathematical proofs in Lean 4. You convert informal mathematical statements into precise declarations and verify that generated proofs are correct both formally and mathematically. This role is aimed at experienced Lean engineers or mathematicians with strong expertise in formal proof.
Posted September 30, 2026
You will evaluate the quality of AI-generated content (presentations, spreadsheets, documents) in a data science context, applying your professional expertise to identify factual, aesthetic, and presentation errors. This remote role, paid hourly, is designed for experienced professionals who have worked in high-level environments.
Posted September 21, 2026
You contribute to building an anonymized health database by exporting your HealthKit data (activity, heart rate, sleep) combined with your clinical history from a partner healthcare facility. This role is for people with complete medical history linked to Apple HealthKit who are ready to share their data securely and confidentially.
Posted September 16, 2026
This role involves contributing to the creation of a health database by sharing your fitness data and medical records from your iPhone. You must have a complete Apple HealthKit profile including physical activity, heart rate, and sleep, and have your clinical records from an accredited institution connected. Your data will be de-identified according to HIPAA standards before use.
Posted September 16, 2026
You will join a network of data experts to assess and evaluate the quality of analyses produced by frontier AI models. Your roles will consist of designing analysis problems, evaluating pipelines and queries generated by the models, and identifying results that are technically valid but potentially misleading for decision-makers. This role is aimed at data practitioners with concrete experience in delivered analytical projects.
Posted September 15, 2026
This role involves evaluating and judging AI models as a machine learning expert, providing the critical expertise that research teams cannot generate alone. You will use your practical experience to assess modeling problems, training code, and production approaches, explaining your reasoning clearly. This permanent roster recruits machine learning practitioners ready to participate in AI training and evaluation projects.
Posted September 15, 2026
This role involves designing and evaluating MLOps infrastructure tasks for training large language models, in the areas of GPU programming, performance profiling, debugging distributed workloads, and high-performance inference. You will generate quality training data by writing precise technical solutions and providing detailed feedback to research and engineering teams. This role targets engineers with confirmed hands-on expertise in ML systems and infrastructure, capable of reasoning about trade-offs between throughput, latency, and memory on modern accelerators.
Posted September 15, 2026
This role involves using EViews, specialized software for econometric analysis and time series modeling, to perform statistical analysis work and economic forecasting. You must have the software installed on your own Windows computer and be able to document your work through high-resolution screenshots.
Posted September 13, 2026
This role involves evaluating and testing specialized applications in scientific computing, particularly MATLAB on Windows. You will use your own software environment to capture visual data and validate the functioning of numerical computation, simulation, and signal processing tools.
Posted September 13, 2026
This role consists of testing and evaluating the Stata SE application on Windows system by taking high-resolution screenshots. It is aimed at professionals with practical experience using statistical and data analysis tools.
Posted September 13, 2026
This role involves leveraging your advanced Excel expertise to improve the training of generative AI models. You will design realistic Excel tasks drawn from your professional experience, provide structured solutions, and evaluate the work of other experts to ensure the quality of training data. The ideal profile is a versatile generalist who has applied Excel at a high level across multiple sectors and business functions.
Posted September 12, 2026
This role consists of evaluating and strengthening the safety of advanced AI models by analyzing their behavior on sensitive topics in Norwegian. You will use your bilingual proficiency (English-Norwegian) and cultural judgment to identify gaps and bypass attempts, with no prior AI experience required.
Posted September 4, 2026
You will participate in improving AI model safety by evaluating how they handle sensitive subjects in Turkish. Your linguistic and cultural judgments will help identify and strengthen weaknesses in these systems when facing delicate content. No prior AI experience is required.
Posted September 4, 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
You have deployed and operated language model-based agents in production, with direct experience of their failures and real adoption in enterprise environments. This role consists of sharing your expertise on reliability, evaluation, and scaling of AI agents in complex environments, through conversational interviews drawing on your concrete practical feedback.
Posted August 12, 2026
You will bring your expertise in atomistic modeling and computational chemistry to a cutting-edge AI laboratory in materials science. Your role consists of generating and evaluating high-quality scientific data for training AI models, by applying your in-depth knowledge of surface simulation, adsorption and reaction kinetics. You will contribute directly to improving the scientific reasoning of models on chemical processes and material properties.
Posted August 6, 2026
We are looking for experienced machine learning researchers to work on empirical research problems covering computer vision, language models, and robustness to adversarial attacks. You will train and improve end-to-end models, optimizing trade-offs between performance, efficiency, and robustness in resource-constrained contexts.
Posted August 5, 2026
You join a red teaming team specialized in adversarial evaluation of conversational AI models. Your role consists of testing AI systems by exploring their vulnerabilities (jailbreaks, prompt injections, biases), generating high-quality data documenting these vulnerabilities, and producing reproducible reports to strengthen model safety. This position is for bilingual English-Danish experts with prior experience in red teaming or related fields (cybersecurity, adversarial ML, socio-technical analysis).
Posted July 30, 2026
This role consists of testing the robustness and security of conversational AI models by subjecting them to sophisticated adversarial attacks. You will generate high-quality training data by identifying vulnerabilities, biases, and systemic risks that automated tests do not detect. The ideal profile has prior experience in red teaming, structured adversarial thinking, and the ability to clearly communicate security risks.
Posted July 30, 2026
This role involves testing the limits and vulnerabilities of conversational AI models using adversarial techniques to identify security risks. You generate high-quality data that enables clients to improve the robustness and reliability of their AI systems. The ideal profile masters red teaming, structured adversarial thinking, and the ability to reproducibly document discovered flaws.
Posted July 30, 2026
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FAQ
44 Mercor Data & Machine Learning jobs are open on SideHustler today. Listings are rechecked against the official postings: the latest check on this list was on October 8, 2026.
Among the 41 open roles that publish an hourly rate in USD, pay runs from $16 to $250 per hour, with a median of $55. 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, Adversarial Testing, AI Safety, Red Teaming, 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.
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.
