STEM Expert (US & International)

The future of AI — whether in training or evaluation, classical ML or agentic workflows — starts with high-quality data. At HumanSignal, we’re building the platform that powers the creation, curation, and evaluation of that data. From fine-tuning foundation models to validating agent behaviors in production, our tools are used by leading AI teams to ensure models are grounded in real-world signal, not noise. Our open-source product, Label Studio , has become the de facto standard for labeling and evaluating data across modalities — from text and images to time series and agents-in-environments. With over 250,000 users and hundreds of millions of labeled samples, it’s the most widely adopted OSS solution for teams working on building AI systems. Label Studio Enterprise builds on that traction with the security, collaboration, and scalability features needed to support mission-critical AI pipelines — powering everything from model training datasets to eval test sets to continuous feedback loops.We started before foundation models were mainstream, and we’re doubling down now that AI is eating the world. If you're excited to help leading AI teams build smarter, more accurate systems — we’d love to talk. STEM Expert - Scientific Content Review Evaluation Specialist About the Role HumanSignal is seeking highly qualified STEM (Science, Technology, Engineering, Mathematics) experts to contribute to cutting-edge AI development projects. This role involves evaluating, annotating, and validating scientific and technical content across multiple STEM disciplines to improve AI model performance in scientific reasoning, problem-solving, and explanation. Compensation Up to $110 USD/hour based on qualifications and project complexity Required Qualifications Education Master's degree required in a STEM-related field PhD strongly preferred in: Physics Chemistry Biology Engineering (any discipline) Earth Sciences Materials Science Astronomy/Astrophysics Or closely related scientific disciplines Degree Field Requirements Candidates must hold degrees directly in STEM fields. Acceptable programs include: Physics (Theoretical, Experimental, Applied) Chemistry (Organic, Inorganic, Physical, Analytical) Biology (Molecular, Cellular, Ecology, Genetics) Engineering (Mechanical, Electrical, Chemical, Civil, etc.) Materials Science Earth Sciences/Geology Astronomy/Astrophysics Biochemistry/Biophysics Environmental Science Responsibilities Review and evaluate scientific content for accuracy, rigor, and clarity Annotate scientific reasoning steps and experimental methodologies Validate AI-generated scientific explanations across various complexity levels Identify errors in scientific concepts, calculations, and experimental design Provide detailed feedback on scientific writing and problem-solving approaches Work with problems spanning introductory to advanced STEM topics Assess the appropriateness of scientific analogies and explanations Qualifications Deep understanding of scientific principles across one or more STEM domains Strong analytical and critical thinking skills Excellent attention to detail and scientific precision Ability to clearly articulate complex scientific concepts Experience with scientific notation, units, and dimensional analysis Familiarity with experimental design and data analysis Knowledge of scientific literature and research methodologies Ability to work independently and meet deadlines Work Details Flexible, project-based work - work on your own schedule Remote position - work from anywhere Variable hours based on project availability and your capacity Ongoing training and calibration provided Quality-focused environment with performance feedback Ideal Candidate Profile Active researchers, professors, industry scientists, or recent graduates in STEM fields Strong publication record or demonstrated scientific expertise Experience in scientific research, teaching, o ... (truncated, view full listing at source)