Freelance AI Trainer - English Annotator

Mindrift connects subject matter experts with project-based AI work at leading technology companies. This freelance role focuses on developing and validating computational chemistry problems that require advanced Python programming. Assignments are temporary and project-based, not permanent employment. What you will do Create computational chemistry problems based on real research workflows and practical applications. Design problems that require Python solutions, using libraries such as numpy, scipy, and chemistry-specific packages. Ensure each problem is complex enough that manual solutions would take days or weeks. Develop challenges involving physical chemistry, quantum chemistry, and molecular modeling. Validate solutions in Python, following standard computational chemistry methodologies. Document each problem clearly and provide accurate, verified answers. Requirements Degree in Chemistry or a related field. Proficiency in Python for numerical validation. Experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar libraries is also valued. At least 2 years of professional experience (applied work, research, or teaching). Background in numerical methods used in chemistry. Familiarity with computational chemistry concepts and methods. Strong written English skills at C1 level or higher. Project details Workload is estimated at 10–20 hours per week during active project phases. Actual hours may vary depending on project needs and are not guaranteed for the full project duration. Compensation Contributors can earn up to $26 per hour, depending on project complexity, scope, and individual performance. Compensation may differ for other projects. How to apply Submit your CV in English, clearly stating your English proficiency level. The process includes qualification steps before joining a project: Apply, pass qualification(s), join a project, complete tasks, and receive payment.

Location: Remote , Pretoria, Gauteng, South Africa Role Overview Mindrift offers project-based opportunities for professionals skilled in statistics and Python. This freelance role supports the assessment, testing, and improvement of AI systems for leading technology companies. Please note: this is not a permanent position. What You Will Do Create original computational statistics problems that reflect real mathematical research processes Develop problems requiring Python programming solutions, using libraries such as Numpy, SciPy, and Sympy Design challenging problems that may take days or weeks to solve Write problems involving advanced reasoning in areas like number theory, combinatorics, graph theory, and numerical analysis Base problems on actual research challenges or practical mathematical applications Validate solutions in Python with standard mathematical libraries Document problem statements clearly and provide verified answers Who We’re Looking For Degree in Statistics or a related discipline Proficient in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, or SciPy is also valued Minimum 2 years of professional experience (applied, research, or teaching) Strong written English skills (C1+ level) Professional certifications (such as CMME, SAS Certifications, CAP) and experience with international or applied projects are a plus How the Process Works Apply (submit CV in English with language proficiency level) Complete required qualifications Join a project Finish assigned tasks Receive compensation Project Commitment Expect to commit 10 to 20 hours per week during active project phases. Actual hours may vary depending on project needs. Compensation Earn up to $21 per hour, depending on expertise and speed. Pay varies by project scope and complexity.

Please submit your CV in English and specify your English proficiency level. toloka-ai, through Mindrift, connects subject-matter experts with project-based work in AI for top technology companies. These projects focus on testing, evaluating, and improving AI systems. This is a project-based contract, not a permanent employment offer. Role Overview This freelance research physicist position centers on creating and validating computational physics problems for AI training. Each project brings its own set of requirements. Contributors may: Develop original computational physics problems that mirror real research workflows Design problems requiring Python programming to solve, using libraries such as Numpy, SciPy, and Sympy Ensure problems are computationally intensive and not solvable by hand within a few days or weeks Craft problems involving complex reasoning in areas like mechanics, electromagnetism, thermodynamics, and quantum mechanics Base problems on genuine research challenges or practical physics applications Verify solutions using Python and standard physics simulation libraries Document problem statements clearly and provide accurate, validated answers Who Should Apply This contract suits physicists with strong Python skills seeking flexible, non-permanent work. Successful contributors typically have: A degree in Physics (theoretical, experimental, computational) or a closely related field Proficiency in Python for numerical validation; familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar libraries is helpful At least 2 years of professional experience in applied research or teaching Background in numerical simulation methods Skill in designing problems that reflect real research workflows in physics Creative problem-solving across multiple physics domains Strong grasp of physics modeling and approximation techniques Excellent written English (C1 level or higher) How Projects Work Apply Pass qualifications Join a project Complete assigned tasks Receive payment Time Commitment During active project phases, tasks typically require 10–20 hours per week. Actual hours depend on project needs and may vary. Compensation Contributors can earn up to $26 per hour, depending on contribution level and pace. Rates may differ by project based on complexity, scope, and required expertise. Location: Remote , Pretoria, Gauteng, South Africa

Please submit your CV in English and specify your level of English proficiency. About Toloka AI Toloka AI connects specialists with AI projects from leading technology companies. The team focuses on testing, evaluating, and improving AI systems. Engagements are project-based and do not represent permanent employment. Role Overview This freelance role suits optical engineers with strong Python skills who are interested in part-time, project-based work. Each project brings different challenges. Typical tasks include: Creating computational physics problems that mirror real research workflows Designing problems that require Python programming to solve, using tools like Numpy, SciPy, or Sympy Ensuring problems are complex enough that they cannot be solved manually within days or weeks Developing scenarios involving advanced reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics Basing problems on genuine research challenges or practical applications in physics Validating solutions with Python and standard physics simulation libraries Documenting problem statements clearly and providing accurate, verified solutions Qualifications Degree in Physics (theoretical, experimental, or computational) or a related field Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, Stata, or other programming languages is also acceptable At least 2 years of professional experience (applied, research, or teaching) Background in numerical simulation techniques Ability to design problems that reflect real-world physics research Creative problem-solving across multiple physics domains Familiarity with physics modeling and approximation methods Strong written English skills (C1 level or higher) Project Commitment During active project phases, tasks typically require 10–20 hours per week. Actual workload depends on project needs and may vary. This estimate applies only while the project is active and does not guarantee a set number of hours. Compensation Participants can earn up to $26 per hour, depending on contribution and pace. Compensation varies by project scope, complexity, and expertise required. Other projects on the platform may offer different earning potentials based on their specific requirements. Application Process Submit your application Pass the qualification stage Join a project Complete assigned tasks Receive payment Location: Remote , Pretoria, Gauteng, South Africa

toloka-ai is looking for a freelance Civil Engineer and Python Specialist to support AI training initiatives. This position is remote, based in Pretoria, Gauteng, South Africa, and allows for flexible work arrangements from any location. Key responsibilities Contribute civil engineering expertise to AI training projects Develop and refine AI training tools using Python Work closely with team members to achieve project objectives and deliverables Role details Freelance contract Remote work Projects blend engineering and programming skills

Submit your CV in English and indicate your English proficiency level. toloka-ai, in partnership with Mindrift, offers project-based assignments for subject matter experts in AI and material science. These freelance roles focus on testing, evaluating, and improving AI systems for technology clients. This is not a permanent employment contract; work is assigned per project. Role overview Freelance AI Trainer & Material Scientist assignments vary by project. Typical work includes: Creating original materials that mirror real engineering workflows Designing engineering problems that require Python programming for calculations and simulations Ensuring tasks are computationally intensive, using numerical methods or iterative approaches Developing challenges in system design, optimization, and analysis Grounding problems in research challenges or practical engineering applications Validating solutions using Python and standard engineering libraries Documenting problem statements and providing thoroughly checked solutions Preferred qualifications Degree in Material Science or a related discipline Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar libraries is valued Minimum 2 years of professional experience (applied, research, or teaching) Understanding of practical engineering constraints and approximations Excellent written English (C1 level or above) Project process Apply Complete qualifications Join a project Fulfill assigned tasks Receive payment Time commitment During active project phases, expect to work approximately 10–20 hours per week. Workload may fluctuate and is not guaranteed outside these periods. Compensation Earn up to $26 per hour, depending on contribution and pace. Actual rates are based on project scope, complexity, and required expertise. Other projects on the platform may offer different pay structures.

Toloka AI is hiring a freelance Mechanical Engineer & Python Specialist to support AI training programs. This remote contract role is based in Pretoria, Gauteng, South Africa. The position blends mechanical engineering experience with strong Python programming skills to advance artificial intelligence learning projects. Key responsibilities Create and deliver training materials that integrate mechanical engineering concepts with Python programming for AI applications Work closely with the team to design clear, engaging content for learners Participate in a distributed team focused on ongoing learning and new ideas Requirements Degree or background in mechanical engineering Solid Python programming skills Interest in artificial intelligence and a desire to help others learn Ability to work independently and manage tasks remotely

Please submit your CV in English and indicate your English proficiency level. About the Role Toloka AI, in partnership with Mindrift, offers project-based opportunities for quantum research scientists and AI trainers with strong Python skills. These are not permanent positions; contributors join on a freelance basis to help test, evaluate, and improve AI systems for leading tech companies. What You Will Do Create original computational physics challenges that mirror real-world research workflows. Develop problems that require Python programming solutions using tools such as Numpy, SciPy, or Sympy. Design computationally demanding tasks that cannot be solved manually within days or weeks. Formulate problems involving advanced reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics. Base challenges on genuine research questions or practical issues in physics. Validate solutions in Python with standard physics simulation libraries. Document problem statements thoroughly and provide accurate, verified answers. Who Thrives Here This role fits quantum physicists with Python experience who are interested in flexible, part-time projects. The strongest candidates will have: A degree in Physics (theoretical, experimental, or computational) or a closely related field. Proficiency in Python for numerical validation. Familiarity with MATLAB, R, C, SQL, Numpy, Pandas, or SciPy is also valued. At least 2 years of professional experience in applied research or teaching. Experience with numerical simulation methods. Skill in designing problems that reflect real physics research workflows. Creative problem-solving abilities across multiple physics domains. Understanding of modeling and approximation techniques in physics. Excellent written English (C1 level or higher). Workflow Overview Application Qualification Assessment Project Participation Task Completion Compensation Time Commitment During active project periods, tasks are expected to require approximately 10–20 hours per week. Actual workload may vary depending on project needs. Compensation Contributors may earn up to $26 per hour, depending on experience and pace. Compensation varies by project based on scope, complexity, and required skills. Other projects on the platform may offer different rates depending on their requirements. Location This is a remote role based in Pretoria, Gauteng, South Africa.

Toloka AI is looking for a freelance consultant with strong skills in biology and Python programming. This remote role is based in Pretoria, Gauteng, South Africa. Role overview The main focus is on creating training materials and leading learning sessions. The goal is to help others apply AI tools and methods in biological research and related fields. What you will do Develop clear and practical training content covering biology and Python topics Facilitate sessions that guide participants in using AI for biological applications Requirements Expertise in biology and Python programming Ability to communicate technical concepts to learners Interest in AI applications within biological research

Toloka AI seeks a Freelance Junior Journalist - AI Trainer to assist with content creation and review for AI application projects. This contract position is remote, with a focus on candidates based in Pretoria, Gauteng, South Africa. Key responsibilities Create and review written material to support the training and improvement of AI algorithms Use journalistic skills to ensure content is clear and accurate Work on projects that influence the direction of AI-driven content Who will thrive in this role Journalists early in their careers who are interested in technology Writers who enjoy exploring new tools and processes Individuals seeking experience in the AI sector while working remotely

Toloka AI seeks a Freelance English Writer and AI Trainer to support its AI training projects. This contract position welcomes applicants based in Pretoria, Gauteng, or working remotely from anywhere in South Africa. Role overview This role centers on crafting written content that helps guide and enhance AI training. The focus is on producing material that is clear, engaging, and easy to follow. What you will do Create written resources to assist AI training processes Develop content that is informative and straightforward Collaborate with the Toloka AI team to achieve project objectives Location This is a remote position. Candidates located in Pretoria, Gauteng, or elsewhere in South Africa are encouraged to apply.

Please submit your CV in English and include your proficiency level. toloka-ai, in partnership with Mindrift, offers freelance opportunities for optical engineers to contribute to project-based AI work. This remote position is not a permanent role but centers on short-term assignments. The focus is on testing, evaluating, and improving AI systems related to optics and physics. Role overview This freelance role involves designing original optics problems that reflect real research workflows. Assignments require developing computationally intensive challenges that may take days or weeks to solve. Problems span advanced topics in mechanics, electromagnetism, thermodynamics, and quantum mechanics, often inspired by real research or practical applications. Each problem must be clearly documented with accurate, verified solutions. What you will do Design optics problems modeled after real-world research processes. Create complex, computationally demanding challenges. Develop problems requiring advanced reasoning across multiple physics domains. Base problem design on authentic research challenges or practical scenarios. Document each problem and provide precise solutions. Requirements Degree in Physics (theoretical, experimental, or computational) or a related field. At least 2 years of relevant experience in applied work, research, or teaching. Experience with numerical simulation techniques. Ability to design problems that reflect real research processes in physics. Creative problem-solving skills across mechanics, electromagnetism, thermodynamics, and quantum mechanics. Understanding of physics modeling and approximation methods. Proficient written English (C1 level or above). Interest in part-time, temporary projects as a freelance optical engineer. Project commitment During peak project periods, expect to dedicate approximately 10–20 hours per week, though workload may shift depending on project needs. Compensation Earn up to $26 per hour, depending on expertise and pace. Actual pay varies by project scope, complexity, and required skills. Other projects on the platform may offer different rates. How to apply Apply with a CV in English, including your proficiency level. If qualified, join a project. Complete assigned tasks. Receive compensation for your work. Location: Remote , Pretoria, Gauteng, South Africa

Please submit your CV in English and indicate your level of English proficiency. Mindrift connects subject matter experts with project-based AI work for major technology companies. As a Freelance Research Physicist - AI Systems Trainer, this position is freelance and project-based, not a permanent role. Role overview Freelance Research Physicists help shape and test the abilities of AI systems in physics. Project tasks vary, but often include: Designing original optics problems modeled after real-world research workflows Developing computationally intensive problems that may require extended solution times Creating scenarios that require advanced reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics Grounding problems in actual research challenges or practical situations in optics and physics Documenting problem statements and providing accurate, verified solutions Requirements Degree in Physics (theoretical, experimental, or computational) or a closely related field At least 2 years of relevant experience, which may include research, applied, or teaching roles Experience with numerical simulation techniques Ability to create problems that reflect authentic research processes in physics Creative problem-solving skills across multiple physics specialties Knowledge of modeling and approximation methods in physics Strong written English skills at C1 level or higher Project workflow Apply Pass qualifications Join a project Complete assigned tasks Receive compensation Time commitment During active projects, expect to contribute roughly 10–20 hours per week. Actual hours depend on project needs and may fluctuate outside of live project phases. Compensation Rates go up to $26 per hour, based on expertise and work pace. Compensation may vary by project complexity and requirements. Other projects on the Mindrift platform may offer different pay rates depending on their needs. Location This is a remote, project-based role open to candidates in Pretoria, Gauteng, South Africa.

Mindrift offers project-based roles for experienced professionals looking to contribute to AI development in the supply chain field. This freelance position is remote and open to candidates in Pretoria, Gauteng, South Africa. The work is not permanent and assignments depend on project availability. Role overview The Freelance Supply Chain Consultant - AI Trainer role focuses on using procurement and supply chain knowledge to improve AI systems. The work involves designing realistic disruption scenarios, defining expected outcomes and mitigation strategies, and evaluating AI-generated recommendations for accuracy and business value. What you will do Create supply chain disruption scenarios based on real issues such as supplier delays, quantity changes, logistics challenges, and quality failures. Define anticipated results and effective mitigation steps for each scenario. Review and critique AI-generated insights, checking them against established business logic. Assess outputs for accuracy, completeness, and relevance within ERP systems (including Microsoft Dynamics 365, Coupa, Jaggaer, and Ariba). Support structured data creation and validation according to provided guidelines. Requirements Minimum 4 years of hands-on experience in procurement, supply chain management, or purchasing, preferably in manufacturing. Strong understanding of procurement processes: purchase orders, vendor management, inventory control, and production planning. Direct experience with ERP platforms such as SAP, Oracle, or Microsoft Dynamics 365. Ability to design and analyze supply chain disruption scenarios and mitigation strategies. Familiarity with disruption types like delays, shortages, quality issues, and logistics problems. Knowledge of Incoterms, logistics, and transportation management. Understanding of Bill of Materials structures and production planning workflows. Experience tracking supplier performance metrics (such as OTIF, lead times, and quality assessments). Analytical skills for evaluating AI outputs against business logic. Background in data validation, structured data entry, or annotation tasks. Strong written English communication skills. How to participate Apply Complete qualification steps Join a project Carry out assigned tasks Receive compensation Time commitment Workload is estimated at 10-20 hours per week during active project phases. Actual hours may vary and are not guaranteed. Compensation Rates are up to $50 per hour, depending on project specifics.

Toloka Annotators is hiring a Freelance Data Annotator to assist with AI model training. This contract position is remote and open to candidates based in Pretoria, Gauteng, South Africa. Key responsibilities Label and annotate data accurately to support the development of machine learning models Apply project instructions to maintain consistent and reliable data quality Handle data carefully to contribute to the improvement of AI systems Role focus This contract is well suited to those interested in artificial intelligence and hands-on work with technology. Strong attention to detail is essential, as your efforts will directly influence the quality and usefulness of AI tools and applications.

toloka-ai seeks a Senior Consultant to contribute to a freelance AI project. This contract role is fully remote, with a focus on candidates located in Pretoria, Gauteng, South Africa. Role overview This position centers on leading and advising AI-focused initiatives. The Senior Consultant will use consulting experience to guide project teams as they develop new artificial intelligence solutions for toloka-ai. Key responsibilities Advise and lead AI-related projects, providing strategic direction. Draw on consulting experience, especially from top-tier firms such as MBB. Support teams as they build and implement artificial intelligence solutions. Requirements Extensive consulting background, ideally with experience at a leading firm (MBB). Proven track record in AI projects or technology-driven initiatives. Ability to work independently in a freelance, remote setting. Location and work style This is a remote freelance contract. Applicants should be based in, or able to work from, Pretoria, Gauteng, South Africa.

Please submit your CV in English and indicate your language proficiency. Mindrift connects skilled professionals with project-based AI roles at leading technology companies. This freelance position is remote and based in Pretoria, Gauteng, South Africa. The work is project-based and does not constitute permanent employment. Role overview The Freelance AI Agent Evaluation Engineer will help build a dataset to assess AI coding agents. The main focus is evaluating how these agents perform on practical developer tasks. This involves designing complex assignments and creating fair evaluation criteria within simulated environments that reflect real-life development settings. Main responsibilities Create virtual companies according to a strategic plan, including setting up codebases, infrastructure, and realistic context such as conversations, documentation, and tickets to simulate a development history. Develop and refine tasks based on the evolving state of these virtual companies. Draft prompts, define evaluation criteria, and ensure tasks are solvable and fairly assessed. Design assignments for isolated environments that mimic a developer’s workstation: a Linux machine with development tools (terminal, CLI), MCP servers (repository, task tracker, messenger, documentation), and a real web application codebase. Write tests that accept all valid solutions and reject incorrect ones. Find the right balance between strictness and leniency to ensure good approaches are not penalized and weak solutions do not pass. Work with AI agents on test cases, making sure tests uncover genuine issues, do not miss faulty solutions, and properly validate successful ones. Review code produced by AI agents, analyze reasons for success or failure, and design edge cases and adversarial scenarios. Iterate on your work based on feedback from expert QA reviewers who check your output against quality standards. What this role does not cover Data labeling Prompt engineering Writing code from scratch (the AI agent generates most code; your focus is on guidance and evaluation) Much of the work involves collaborating with AI systems. Creating tasks that challenge advanced models means working closely with these agents.

Toloka AI is looking for a Computer Science Specialist skilled in Python to join projects focused on artificial intelligence. This role involves working with the Mindrift platform to support and develop AI-driven solutions. The position is remote, open to candidates based in Pretoria, Gauteng, or anywhere in South Africa. Key responsibilities Use Python programming to contribute to AI initiatives on the Mindrift platform Work closely with other specialists to build and improve artificial intelligence solutions Location This is a remote position for candidates located in South Africa, including Pretoria and Gauteng.

Role overview Toloka AI seeks a Freelance Legal Consultant with expertise in US law to contribute to AI training initiatives. This remote position is open to professionals located in Pretoria, Gauteng, South Africa. The consultant will use legal knowledge to help strengthen the accuracy and compliance of AI systems. What you will do Collaborate with AI training teams to review and refine content involving US legal matters. Assess AI-generated outputs for legal accuracy and ensure alignment with US regulations. Offer legal guidance to inform the development of AI models focused on legal subject areas. Location This is a remote role, but applicants must reside in Pretoria, Gauteng, South Africa.