Freelance AI Trainer and Data Annotator

Please submit your CV in English, including your English proficiency level. Mindrift connects professionals with project-based roles focused on evaluating, improving, and testing AI systems for leading technology companies. This freelance opportunity is project-based, not a permanent position. Role overview This freelance research physicist position centers on designing and validating computational physics challenges to support AI training. Each project brings a new set of tasks, often requiring a mix of creativity and technical expertise. Contributors create problems that reflect authentic research workflows and require Python programming solutions. What you will do Design computational physics challenges based on real research scenarios Create problems that require Python solutions, using libraries such as Numpy, SciPy, or Sympy Ensure tasks are computationally intensive and not easily solvable by hand Develop advanced problems in mechanics, electromagnetism, thermodynamics, and quantum mechanics Validate solutions in Python with standard simulation libraries Document problem statements clearly and supply verified answers Requirements Degree in Physics (theoretical, experimental, or computational) or a related field Proficiency in Python for numerical validation; familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is a plus At least 2 years of experience in applied, research, or teaching roles Background in numerical simulation techniques Ability to design problems reflecting real-world research practices Creative problem-solving across multiple areas of physics Knowledge of modeling and approximation methods Strong written English skills (C1 level or higher) How to participate Apply Pass qualifications Join a project Complete assigned tasks Receive payment Time commitment During active project periods, expect to spend approximately 10–20 hours per week, depending on project needs. This is an estimate and not a guaranteed workload. Compensation Earn up to $29 per hour based on contribution and pace. Actual rates depend on project scope, complexity, and required expertise. Other projects on the platform may offer different rates. Location This remote freelance role is open to candidates based in Porto, Porto District, Portugal.

Please submit your CV in English and include your English proficiency level. Mindrift offers project-based AI work for experienced professionals, collaborating with major technology companies. Projects focus on testing, evaluating, and improving AI systems. This is a non-permanent, remote position based in Porto, Portugal, though work is fully remote. Role overview The Freelance Quantum Research Scientist & AI Trainer works on projects at the intersection of computational physics and quantum mechanics. The core focus is designing and validating Python-based problems that reflect real research challenges. All work is conducted remotely. What you will do Design computational physics problems modeled after real research workflows Create Python-based problems using libraries such as Numpy, SciPy, and Sympy Develop complex, computationally intensive problems that may take days or weeks to solve Craft advanced reasoning problems in mechanics, electromagnetism, thermodynamics, and quantum mechanics Base problems on authentic research challenges or practical physics scenarios Validate solutions using standard Python physics simulation libraries Document clear problem statements and provide verified solutions Requirements 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, or SciPy is a plus At least 2 years of professional experience in applied research or teaching Hands-on experience with numerical simulation methods Ability to design problems that mirror real-world research processes Creative approach to problem design across multiple areas of physics Familiarity with modeling and approximation techniques in physics Strong written English at C1 level or higher How to apply The application process follows these steps: Apply Pass qualifications Join a project Complete assigned tasks Receive compensation Project commitment Estimated workload is 10–20 hours per week during active project periods. Actual hours may vary depending on project demands. Compensation Contributors can earn up to $29 per hour. Actual rates depend on project scope and individual contributions.

Please submit your CV in English and indicate your English proficiency level. This freelance, project-based role with Mindrift centers on developing and validating material science problems for AI training. Work is remote, with projects supporting leading technology companies. Assignments are not permanent and align with the needs of each project. Role overview Create original material engineering problems that mirror real-world scenarios and workflows Develop problems that require Python programming for engineering computations and simulations Design computationally intensive challenges using numerical methods or iterative solutions Focus on system design, optimization, and analysis tasks Draw inspiration from actual research issues or practical engineering cases Validate solutions with Python and standard engineering libraries Clearly document each problem statement and provide verified answers Requirements Degree in Material Science or a closely related discipline Strong Python skills for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, Stata, or similar tools is valued Minimum of 2 years of experience in applied, research, or teaching roles Solid understanding of practical engineering constraints and approximations Excellent written English (C1 level or higher) How projects work The process includes: Apply, pass qualifications, join a project, complete assigned tasks, and receive compensation. Time commitment Expect to dedicate around 10–20 hours per week during active project periods. The actual workload may shift based on project needs. Compensation Earn up to $29 per hour, depending on experience and pace. Rates may vary between projects based on complexity and required expertise. Other projects on the platform may offer different compensation according to their needs.

Please submit your CV in English and specify your level of English proficiency. Mindrift offers project-based contract work for specialists in AI, connecting contributors with technology companies focused on testing, evaluating, and improving AI systems. This is not a permanent employment position but rather contract-based project work. Role overview This freelance AI Trainer position centers on creating and validating computational physics problems that require advanced Python programming. The work involves designing scenarios that reflect authentic research workflows and practical physics applications, particularly in areas like mechanics, electromagnetism, thermodynamics, and quantum mechanics. Contributors will: Develop original computational physics problems based on real research or practical applications Create challenges that require Python programming, using libraries such as Numpy, SciPy, and Sympy Design computationally intensive problems not easily solvable by hand Build scenarios demanding advanced reasoning across multiple physics domains Validate solutions in Python with standard physics simulation tools Document clear problem statements and provide verified, correct solutions Requirements Degree in Physics (theoretical, experimental, or computational) or a closely related field Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is a plus Minimum 2 years of professional experience in applied physics, research, or teaching Background in numerical simulation methods Ability to design problems reflecting real-world research in physics Creative problem-solving skills across multiple physics domains Familiarity with physics modeling and approximation techniques Strong English skills at C1 level or above How the process works Apply Complete qualification(s) Join a project Finish assigned tasks Receive compensation Project commitment During active project phases, expect to spend roughly 10–20 hours per week, depending on project needs. This is an estimate and not a guaranteed number of hours. Compensation Contributors may earn up to $29 per hour. Actual rates depend on expertise, task complexity, and completion speed, and may vary by project.

Toloka AI is seeking a freelance specialist with a strong background in biology and Python programming. This remote position is based in Porto, Portugal. Role overview This project centers on training AI models to better understand biological concepts using Python. The work involves applying subject matter expertise to improve how AI interprets and processes information in biology through code-based tasks. What you will do Use knowledge of biology and Python to guide AI model training Contribute to the development of educational resources powered by AI Location This freelance role is fully remote, with a focus on candidates located in Porto, Porto District, Portugal.

Please submit your CV in English and indicate your English proficiency level. toloka-ai partners with Mindrift to offer project-based AI work for professionals in statistics and Python. These freelance roles help test, evaluate, and improve AI systems for technology clients. Assignments are temporary and do not constitute permanent employment. Role overview This freelance AI Trainer position focuses on designing and validating computational statistics problems with Python. Projects differ in scope, but core responsibilities include: Creating original computational statistics problems that mirror real mathematical research processes Developing challenges that require Python programming, often using libraries such as Numpy, SciPy, or Sympy Ensuring that problems are computationally demanding, sometimes requiring days or weeks to solve Incorporating advanced reasoning in fields like number theory, combinatorics, graph theory, and numerical analysis Basing problems on real research questions or practical mathematics applications Validating solutions using Python and established mathematical libraries Documenting both problem statements and solutions with clarity Requirements Degree in Statistics or a closely related discipline Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar libraries is valued Minimum of 2 years of relevant experience in applied, research, or teaching settings Strong written English skills at C1 level or higher Professional certifications (such as CMME, SAS Certifications, CAP) and international or applied project experience are considered a plus Process steps Application Qualification Project participation Task completion Compensation Time commitment During active project phases, the estimated time commitment is 10–20 hours per week. Actual hours may shift depending on project needs. Compensation Contributors may earn up to $34 per hour, depending on expertise and pace. Compensation can vary by project requirements.

Toloka AI is looking for a freelance Civil Engineer & Python Specialist to support AI model training projects. This role is remote, with candidates expected to be based in Porto, Porto District, Portugal. Role overview This position combines civil engineering knowledge with Python programming to help improve AI systems. The work is project-based and allows for flexible, freelance engagement. Key responsibilities Offer civil engineering insights to guide AI model training Use Python to assist with AI development and related tasks Requirements Professional background in civil engineering Proficiency in Python Interest in artificial intelligence and openness to freelance work Location This is a fully remote freelance opportunity. Applicants must reside in Porto, Porto District, Portugal.

Please submit your CV in English and indicate your English proficiency level. Mindrift connects skilled professionals with project-based AI work for leading technology companies. Projects focus on testing, evaluating, and improving AI systems. This is a contract-based, non-permanent role. Role overview This freelance position combines electrical engineering expertise with Python programming for AI training projects. Work is remote, based in Porto, Porto District, Portugal. Contributors handle a variety of engineering and programming assignments, with each project bringing its own requirements. Key responsibilities Design engineering challenges that mirror real-world workflows Create Python programming tasks for calculations and simulations Develop computationally intensive problems using numerical methods or iterative techniques Build challenges involving system design, optimization, and analysis Use authentic research problems or practical scenarios as the basis for tasks Validate solutions with Python and common engineering libraries Document problem statements clearly and provide verified solutions Requirements Degree in Electrical Engineering or a closely related field Proficiency in Python for numerical validation; familiarity with tools such as MATLAB, R, C, SQL, Numpy, Pandas, or SciPy Minimum 2 years of professional experience, including applied research or teaching Understanding of real-world engineering constraints and approximations Strong written English skills (C1 level or higher) Professional certifications (such as CMME, SAS Certifications, CAP) and experience with international or applied projects are a plus Project workflow Application Qualification Project engagement Task completion Compensation Time commitment During active project phases, expect to spend about 10–20 hours per week. Actual workload depends on project needs and is not guaranteed outside these periods. Compensation Earn up to $31 per hour, depending on expertise and task completion rate. Actual pay may vary by project based on scope, complexity, and required skills.

Please submit your CV in English and indicate your level of English proficiency. Mindrift connects specialists in chemistry and Python with project-based AI work for technology firms. These freelance roles focus on testing, evaluating, and improving AI systems. Participation is project-based, not permanent employment. Role overview As a Chemistry & Python Specialist, contributors work on a variety of computational chemistry tasks. Projects may involve: Designing original computational chemistry problems that mirror real research workflows Developing Python solutions using libraries such as numpy, scipy, and chemistry-specific packages Creating problems that require computational approaches beyond manual calculation Formulating challenges in physical chemistry, quantum chemistry, or molecular modeling that demand advanced reasoning Basing problems on real-world research issues or practical chemistry applications Validating answers through Python and established computational chemistry methods Documenting both problem statements and verified solutions thoroughly 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 acceptable At least 2 years of relevant experience (applied work, research, or teaching) Experience with numerical methods in chemistry Strong knowledge of computational chemistry concepts and methods Excellent written English (C1 level or higher) Project process The engagement process includes applying, completing qualifications, joining a project, performing assigned tasks, and receiving compensation. Time commitment Active project phases typically require an estimated 10–20 hours per week, depending on project needs. Actual workload may vary. Compensation Contributors can earn up to $29 per hour, depending on expertise and speed. Compensation is project-specific and may vary based on scope and complexity. Other projects on the Mindrift platform may offer different pay rates.

Toloka AI seeks a freelance Mechanical Engineer with strong Python skills to join as an AI Trainer. This contract role is fully remote and welcomes candidates based in Porto or anywhere in Portugal. Role overview This position centers on sharing expertise in mechanical engineering and Python, guiding learners as they develop skills relevant to artificial intelligence. The work is flexible and designed for those who enjoy teaching and supporting others in a technical context. What you will do Develop training materials that highlight the intersection of mechanical engineering and Python in AI applications. Lead online sessions for individuals interested in artificial intelligence. Provide hands-on support to help participants build practical skills. Location and contract details This is a freelance, remote position. While the focus is on supporting learners in Porto, applicants from across Portugal are welcome.

Toloka AI seeks a Freelance English Writer & AI Trainer to join its remote team in Porto, Portugal. This position blends content creation in English with hands-on involvement in training AI systems. Role overview The main focus is writing clear and engaging English text. Alongside writing, the role supports the development of artificial intelligence by contributing to training tasks and projects. Collaboration happens remotely with a team that values new ideas and ongoing progress. Location This is a remote role based in Porto, Porto District, Portugal.

Toloka AI seeks a Freelance Mathematics Expert - AI Trainer to support the development and improvement of artificial intelligence models. This remote position is based in Porto, Porto District, Portugal, and centers on applying mathematical skills to help AI systems achieve reliable accuracy and efficiency. Key responsibilities Use mathematics expertise to train and refine AI models Collaborate with a team focused on AI development Contribute to projects that move AI technologies forward Work arrangement This is a freelance role with all collaboration happening online. Team members work together remotely to improve AI systems.

Please submit your CV in English and indicate your English proficiency level. Mindrift connects skilled professionals with project-based AI work for leading technology companies. Projects focus on testing, evaluating, and improving AI systems. All participation is freelance and project-based, not permanent employment. Role overview This freelance Optical Engineer role centers on using Python to help train and refine AI systems. The work is remote, with preference for candidates based in Porto, Portugal, or nearby areas. What you will do Design computational physics problems that reflect real research workflows. Create problem sets requiring Python programming solutions, using libraries such as Numpy, SciPy, and Sympy. Ensure problems are computationally intensive and not solvable manually in a reasonable timeframe. Develop scenarios involving complex reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics. Draw on real research challenges or practical physics applications for inspiration. Validate solutions in Python, using established physics simulation libraries. Document each problem clearly and provide verified, correct answers. Requirements Degree in Physics (theoretical, experimental, or computational) or a related field. Proficiency in Python for numerical validation. Familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar languages is also acceptable. At least 2 years of professional experience in applied research or teaching. Experience with numerical simulation methods. Ability to design problems that mirror authentic physics research workflows. Creative approach to problem design across multiple physics domains. Knowledge of physics modeling and approximation techniques. Strong written English skills at C1 level or above. Project workflow Apply Pass qualifications Join a project Complete assigned tasks Receive compensation Time commitment Tasks typically require about 10–20 hours per week during active project phases. Workload may vary depending on project needs and is not guaranteed outside of active phases. Compensation Earnings can reach up to $29 per hour, depending on expertise and contribution speed. Actual rates may differ by project, based on scope, complexity, and required skills. Other projects may offer different rates according to their specific requirements.

Toloka AI seeks a Freelance Junior Journalist - AI Trainer to support its AI training projects. This remote position is based in Porto, Porto District, Portugal, and blends content creation with hands-on involvement in artificial intelligence development. Key responsibilities Write and edit materials that contribute directly to AI training initiatives Work closely with a team dedicated to advancing artificial intelligence Offer feedback and ideas to help refine AI processes Collaboration and flexibility This freelance role allows for work from any location. Team members value thoughtful writing and regular collaboration as they help shape AI technologies.

This freelance, project-based role connects mathematics experts with Python skills to AI training initiatives for toloka-ai. Work is remote, based in Porto, Portugal, and assignments are not permanent positions. Role overview Projects involve designing and validating advanced computational mathematics problems that reflect real mathematical research and practical applications. Contributors may: Create original math problems that mirror authentic research workflows Develop problems requiring Python programming to solve, often using Numpy, SciPy, or Sympy Ensure problems are computationally intensive, beyond manual solution within days or weeks Design tasks involving reasoning in number theory, combinatorics, graph theory, and numerical analysis Base problems on real research challenges or practical mathematical scenarios Validate solutions in Python with established mathematical libraries Document problem statements and provide verified, correct answers Requirements Degree in Mathematics (Pure or Applied) or a related field Proficiency in Python for numerical validation; familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, Stata, or similar tools is also acceptable At least 2 years of professional experience (applied, research, or teaching) Experience with numerical methods and symbolic computation Ability to design problems that reflect genuine mathematical research workflows Understanding of computational complexity theory Strong written English skills (C1 level or higher) How to participate Apply with a CV in English, including your English proficiency level Pass relevant qualification steps Join a project Complete assigned tasks Receive compensation Workload and compensation Project workload is estimated at 10–20 hours per week during active phases, depending on requirements. This is an estimate and not a guaranteed number of hours. Compensation can reach up to $29 per hour equivalent, based on contribution level and pace. Actual rates may vary by project scope, complexity, and expertise required. Other projects on the platform may offer different earning levels depending on their needs.

Mindrift brings together specialists for project-based AI initiatives, collaborating with leading technology companies. The work centers on testing, evaluating, and refining AI systems for real-world use. Please note: this is a freelance, project-based role rather than a permanent position. Role overview This freelance Supply Chain Consultant - AI Trainer position calls for deep expertise in procurement and supply chain operations. The consultant will draw from industry experience to design realistic disruption scenarios, define expected outcomes and mitigation plans, and review AI-generated recommendations for accuracy and business value. What you will do Create authentic supply chain disruption scenarios based on actual manufacturing and procurement challenges, such as supplier delays, quantity changes, logistics problems, or quality failures. Define likely outcomes and effective mitigation strategies for each scenario. Review AI-generated suggestions, checking for practical business logic and relevance. Assess deliverables for precision, completeness, and fit within ERP systems (including Microsoft Dynamics 365, Coupa, Jaggaer, Ariba/SAP). Support structured data creation and validation, following established guidelines. Requirements Minimum 4 years of hands-on experience in procurement, supply chain, or purchasing, preferably in manufacturing. Solid understanding of procurement processes: purchase orders, vendor management, inventory, and production planning. Direct experience with ERP platforms such as SAP, Oracle, or Microsoft Dynamics 365. Ability to create and analyze disruption scenarios and related mitigation plans. Knowledge of disruption types, including delays, shortages, quality issues, and logistics challenges. Familiarity with Incoterms and logistics or transportation management. Understanding of Bill of Materials (BOM) and production planning methods. Experience tracking supplier performance metrics (such as OTIF, lead times, quality scores). Strong analytical skills for reviewing AI outputs against real business needs. Background in data validation, structured data entry, or annotation work. Excellent written English communication skills. Project process The process includes: Application, Qualification Assessment, Project Engagement, Task Completion, and Compensation. Time commitment Estimated 10-20 hours per week during active project periods. Actual workload may vary based on project requirements; there is no guaranteed minimum or maximum number of hours. Compensation Rates up to $50 per hour, depending on the specific project.

Role overview Mindrift is looking for a freelance n8n Workflow Developer to join the Tendem project (https://tendem.ai/). This contract role centers on building and refining automation workflows in a hybrid AI and human operations setting. The position is remote, but applicants must be based in Porto, Porto District, Portugal. As an AI Pilot, you will work closely with Tendem Agents who manage repetitive business tasks. Your structured mindset and automation skills will help deliver efficient workflow solutions that support both AI and human-driven processes. This part-time contract fits professionals with practical experience in no-code automation, workflow design, and process improvement across varied business systems. What you will do Design, build, and evaluate advanced workflows in self-hosted n8n environments. Plan and implement integrations across multiple systems to create scalable automation pipelines. Develop and enhance AI-driven workflows, including content generation, enrichment systems, and process automation. Set up and maintain automation for lead generation, outreach, and data processing. Create web scraping workflows to extract and process data accurately. Optimize workflow execution, node sequencing, and error handling to minimize failures, delays, and API timeouts. Location and work arrangement This is a remote, part-time freelance position. Candidates must be located in Porto, Porto District, Portugal.

Please submit your resume in English and indicate your English proficiency level. Toloka offers remote, project-based freelance opportunities to support the development of artificial intelligence. Contributors play a key role in improving Generative AI for leading technology organizations by providing real-world data and feedback. Role overview This freelance position focuses on annotating and evaluating data to help train AI systems. Work is fully remote and assignments are offered based on project needs and your profile. Tasks may include rating AI-generated content, checking for factual accuracy, and comparing different outputs. The type and frequency of assignments depend on project availability. Main responsibilities Review and assess data such as text, images, or video. Label or categorize content according to detailed project guidelines. Identify and report material that is inaccurate, sensitive, inappropriate, or unclear. Note: This is a freelance, project-based role. Tasks are assigned only when projects are active, and invitations depend on current needs and your qualifications. Compensation for AI Trainers can reach up to $17 per hour equivalent, depending on the project. Requirements Bachelor’s degree in any field. At least 1 year of professional work experience. Advanced English proficiency (C1 or above), both written and spoken. Strong logical reasoning, fact-checking, and analytical abilities. Attention to detail and the ability to follow complex instructions. Clear communication skills and readiness to ask for clarification when necessary. Interest in technology and artificial intelligence. Benefits Flexible, part-time freelance work that can fit around other commitments. Direct experience with advanced AI projects, building valuable skills for your portfolio. Opportunity to influence how future AI models interpret and interact in your area of expertise. Find more information about Toloka at https://toloka.ai/.

Role overview Mindrift is hiring a Freelance Integration Developer (API Specialist) for the Tendem project (https://tendem.ai/). This contract position, also known as AI Pilot, centers on building and maintaining integrations that connect systems within a hybrid AI and human workflow. The work is fully remote, based in Porto, Porto District, Portugal. What you will do Collaborate with Tendem Agents to automate repetitive tasks and streamline workflows Design, implement, and monitor integrations across various platforms Use structured problem-solving and technical skills to ensure reliable data connectivity Oversee quality control for integration solutions Who succeeds in this role Developers with practical experience in APIs and webhooks Those skilled at building and maintaining data pipelines between multiple systems Individuals who appreciate flexibility and can work remotely from Porto, Porto District, Portugal Position details Freelance contract Remote work arrangement Work alongside a forward-thinking team on the Tendem project