Freelance Optical Engineer with Python Skills for AI Training

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. The company focuses on testing, evaluating, and improving AI systems. This position is freelance and project-based, not a permanent role. Role overview The Freelance Research Physicist with Python expertise designs and validates advanced computational physics problems modeled after real research challenges. Projects are remote and based in Belo Horizonte, State of Minas Gerais, Brazil. Main responsibilities Create computational physics problems that reflect authentic research workflows. Develop challenges requiring Python programming solutions, especially with Numpy, SciPy, and Sympy. Design problems that are computationally intensive, taking days or weeks to solve manually. Cover a range of topics including mechanics, electromagnetism, thermodynamics, and quantum mechanics. Base problems on real research obstacles or practical physics applications. Validate solutions in Python using established physics simulation libraries. Document problem statements clearly and provide verified solutions. Qualifications Degree in Physics (theoretical, experimental, or computational) or a related field. Proficient in Python for numerical validation. Experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or domain-specific libraries is a plus. Minimum of 2 years of relevant experience in applied work, research, or teaching. Expertise in numerical simulation methods. Ability to design problems that mirror real-world research workflows in physics. Creative approach to developing problems across multiple physics domains. Understanding of physics modeling and approximation techniques. Strong written English skills at C1 level or higher. How projects work Apply Meet qualifications Join a project Complete assigned tasks Receive payment Time commitment During active project phases, expect around 10 to 20 hours of work per week. Actual hours may vary depending on project activity and requirements. Compensation Earn up to $14 per hour, depending on proficiency and project complexity. Rates may differ by project based on scope and expertise required.

To apply, submit your CV in English and indicate your English proficiency level. Mindrift connects subject matter experts with project-based AI work for leading technology companies. Work is organized by project and does not represent permanent employment. Role overview This freelance, remote position focuses on designing and documenting advanced physics problems to support AI training. Assignments vary and may include: Developing original optics problems that reflect real-world research processes in physics Ensuring problems are computationally intensive and not easily solved by hand Creating scenarios requiring complex reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics Basing challenges on actual research questions or practical applications in optics and physics Writing clear problem statements and supplying verified solutions Requirements Degree in Physics (theoretical, experimental, or computational) or a closely related field At least 2 years of professional experience, which may include research, applied, or teaching roles Experience with numerical simulation techniques Ability to design problems that mirror physics research workflows Creative approach to developing problems across multiple physics domains Familiarity with modeling and approximation methods in physics Strong written English skills (C1 level or higher) Project commitment Typical workload ranges from 10 to 20 hours per week during active projects. Actual hours may vary based on project needs. Compensation Earnings can reach up to $14 per hour, depending on contribution level and project complexity. Rates may differ by project scope and required expertise. Application process Apply with a CV in English and specify your English proficiency Complete qualification(s) Join a project Finish assigned tasks Receive compensation Location: Remote , Belo Horizonte, State of Minas Gerais, Brazil

Please submit your CV in English and specify your level of English proficiency. Mindrift connects professionals with project-based work in AI for leading technology companies. This contract focuses on assessing, testing, and improving AI systems. The position is project-based and not a permanent hire. Role overview The Freelance Quantum Research Scientist & AI Trainer (Python) role centers on developing and validating computational physics problems that reflect real research workflows. Contributors design challenges that require Python programming, especially using libraries such as Numpy, SciPy, and Sympy. Problems should be computationally intensive, not solvable by hand, and rooted in authentic scenarios from physics research or practical applications. Areas covered include mechanics, electromagnetism, thermodynamics, and quantum mechanics. Responsibilities also include validating solutions in Python, using established simulation libraries, and documenting both the problem statements and their 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 also considered At least 2 years of professional experience in applied, research, or teaching settings Experience with numerical simulation methods Ability to design problems that mirror real research workflows in physics Creative problem-solving across multiple physics domains Knowledge of physics modeling and approximation techniques Strong written English skills at C1 level or above Application process Submit your application Complete qualifications Join a project Complete assigned tasks Receive payment Project commitment Project phases typically require about 10–20 hours per week, depending on current needs. This estimate applies only during active project periods and does not guarantee a fixed workload. Compensation Contributors may earn up to $14 per hour, depending on the complexity of the project and individual expertise. Actual rates may vary based on project requirements. Other projects on the Mindrift platform may offer different compensation levels. Location: Remote , Belo Horizonte, State of Minas Gerais, Brazil

Please submit your CV in English and specify your English proficiency level. This freelance contract with Toloka AI (via Mindrift) is open to material scientists with strong Python skills. The focus is on supporting AI development for technology companies. The role is remote and based in Belo Horizonte, State of Minas Gerais, Brazil. This is not a permanent position, but a flexible, project-based opportunity. Key responsibilities Develop original material engineering problems that mirror real engineering workflows Design challenges involving Python programming for calculations and simulations Ensure problems require computational effort, using numerical methods or iterative techniques Create scenarios focused on system design, optimization, and analysis Draw from real-world research or practical engineering applications Validate solutions using Python and standard engineering libraries Write clear problem statements and provide accurate, verified solutions Requirements Degree in Material Science or a related discipline Proficiency in Python for numerical validation; familiarity with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is also acceptable At least 2 years of experience in applied work, research, or teaching Understanding of practical engineering constraints and approximations Excellent written English skills at C1 level or higher Project details Estimated workload is 10–20 hours per week during active project phases. Actual hours may change based on project needs and are not guaranteed. Compensation Earnings can reach up to $14 per hour. Pay depends on contribution, pace, and project requirements. Compensation may vary with project complexity and scope. Application process Apply in English, including your CV and English proficiency level Complete required qualifications Join a project when invited Finish assigned tasks Receive compensation for completed work This is a freelance, project-based position. Permanent employment is not available.

Mindrift connects subject matter experts with AI projects for leading technology companies, focusing on testing, evaluation, and improvement of AI systems. This is a project-based freelance role, not a permanent position. Role overview As a Mathematics & Python Specialist, freelance AI trainers work on a range of challenging projects. Tasks may include: Creating original computational mathematics problems that mirror real mathematical research workflows Designing problems that require Python programming to solve, often using libraries such as Numpy, SciPy, or Sympy Ensuring problems are computationally intensive and cannot be solved manually in a reasonable timeframe Developing problems involving complex reasoning in areas like number theory, combinatorics, graph theory, and numerical analysis Basing problems on real-world research challenges or practical mathematical applications Validating solutions in Python with established mathematical libraries Clearly documenting problem statements and providing verified solutions Requirements Degree in Mathematics (Pure or Applied) or a related field Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is also accepted At least 2 years of professional experience, which may include applied, research, or teaching roles Experience with numerical methods and symbolic computation Ability to design problems reflecting authentic mathematical research workflows Understanding of computational complexity theory Strong written English skills (C1 level or higher) Process The process includes: Apply → Pass qualifications → Join a project → Complete tasks → Receive payment. Project commitment Tasks for this project are estimated at 10–20 hours per week during active phases. This is an estimate, not a guaranteed workload. Compensation Contributors may earn up to $14 per hour, depending on contribution level and pace. Actual rates may vary by project based on scope, complexity, and required expertise. Other projects on the platform may offer different earning opportunities. Please submit your CV in English and include your English proficiency level.

Mindrift seeks a Freelance Python Data Scraping Engineer to join the Tendem project. This part-time, remote contract is open to candidates based in Belo Horizonte, State of Minas Gerais, Brazil. The position focuses on advanced data extraction and scraping within a workflow that combines AI and human expertise. As an AI Pilot on the Tendem project, the role involves technical data extraction while Tendem Agents oversee routine tasks. Work includes hands-on coding and quality checks to ensure the delivery of accurate, actionable datasets. What you will do Extract structured data from complex websites, ensuring accuracy and thoroughness throughout the process. Work with internal tools such as Apify and OpenRouter, and use custom workflows to gather, validate, and deliver data according to project needs. Adjust scraping techniques for dynamic web sources, including sites with JavaScript-rendered content or changing layouts. Maintain high data quality by running validation checks, reviewing consistency across sources, and following formatting standards before submission. Scale scraping operations for large datasets using batching or parallelization, monitor for failures, and keep processes stable as site structures evolve. Requirements 3+ years of experience in data engineering, web scraping, automation, or a related area. Proficient in Python and familiar with web scraping tools or frameworks. Strong analytical skills and attention to detail. Comfortable troubleshooting and adapting scraping methods for different website architectures. Compensation Project participants can earn up to $17 per hour, depending on contribution and efficiency. Compensation for other projects on the Mindrift platform may vary based on scope, complexity, and required skills. How to apply Apply to this position and complete the qualification process. Once approved, projects can be selected to match skills and availability. The work includes coding, automation, and refining AI outputs, all aimed at improving AI systems in practical settings.

Role overview Toloka AI seeks a freelance AI Trainer who combines civil engineering experience with strong Python programming skills. This contract position is fully remote, with work based in Belo Horizonte, State of Minas Gerais, Brazil. What you will do Guide and support others in civil engineering topics and Python programming as part of AI-focused projects. Help develop and refine methods for AI training. Apply your expertise to influence how new AI tools are built for the civil engineering field. Location This is a remote role tied to Belo Horizonte, State of Minas Gerais, Brazil.

Mindrift connects chemistry specialists with project-based freelance opportunities focused on AI system development for leading technology companies. These roles involve short-term projects and do not represent permanent employment. Role overview This freelance position centers on creating and validating computational chemistry challenges for AI training. Tasks vary by project and may include: Designing original computational chemistry problems that reflect real-world research workflows Developing challenges that require Python programming, using libraries such as numpy, scipy, or chemistry-specific tools Ensuring problems are computationally intensive and cannot be solved manually within a reasonable timeframe Incorporating advanced reasoning in areas like physical chemistry, quantum chemistry, and molecular modeling Basing problems on authentic research questions or practical chemistry applications Validating solutions in Python using established computational chemistry methods Clearly documenting problem statements and providing accurate, verified solutions Requirements Degree in Chemistry or a closely related field Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or domain-specific libraries is also valued At least 2 years of relevant professional experience (applied, research, or teaching) Expertise in numerical methods as applied to chemistry Strong understanding of computational chemistry concepts and techniques Excellent written English skills (C1 level or higher) Project structure The process includes submitting an application, passing qualification steps, participating in a project, completing assigned tasks, and receiving payment. Tasks typically require 10–20 hours per week during active phases, though actual workload may vary by project. Compensation Contributors can earn up to $14 per hour, depending on expertise and pace. Actual rates may vary based on project scope, complexity, and required skills. Other projects on the platform may offer different compensation levels. Please submit your CV in English and indicate your English proficiency level.

Please submit your CV in English and specify your English proficiency level. Mindrift connects subject-matter experts with project-based AI work for technology companies. This is a freelance, project-based position, not a permanent role. Role overview The Freelance AI Trainer - Physics and Python Specialist creates and tests computational physics problems for AI systems. This work involves designing problems that reflect real research workflows and require Python programming to solve, often using libraries such as Numpy, SciPy, or Sympy. Problems should be complex enough that they cannot be solved by hand in a reasonable timeframe, and should draw from advanced topics in mechanics, electromagnetism, thermodynamics, and quantum mechanics. Each problem must be clearly documented, based on genuine research challenges or practical applications, and include accurate, verified solutions implemented in Python. 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 Creativity in developing problems across multiple physics domains Familiarity with modeling and approximation techniques in physics Strong written English skills at C1 level or higher How to apply Apply Pass qualification(s) Join a project Complete assigned tasks Receive compensation Time commitment Project tasks typically require 10–20 hours per week during active phases. Actual workload may vary depending on project needs. Compensation Earn up to $14 per hour, based on expertise and task completion rate. Compensation varies by project complexity, scope, and required skills. Other projects on the Mindrift platform may offer different earning potentials. Location This is a remote role for candidates based in Belo Horizonte, State of Minas Gerais, Brazil.

To apply, please submit your CV in English and indicate your English proficiency level. Mindrift connects experienced specialists with project-based AI work for leading technology companies. Assignments focus on testing, evaluating, and improving AI systems. These are freelance, project-specific roles rather than permanent employment. Role overview This freelance, remote position is available to candidates based in Belo Horizonte, State of Minas Gerais, Brazil. The work centers on designing and validating computational statistics problems that mirror real mathematical research and require Python programming to solve. What you will do Design original computational statistics problems inspired by real-world mathematical research workflows. Create challenges that require Python programming, using libraries such as Numpy, SciPy, and Sympy. Ensure problems are computationally intensive and not solvable by hand in a reasonable timeframe. Develop challenges involving complex reasoning in areas like number theory, combinatorics, graph theory, and numerical analysis. Base problem statements on authentic research questions or practical mathematical applications. Validate solutions in Python with standard mathematical libraries. Document problems clearly and provide verified, correct answers. Requirements Degree in Statistics or a related field. Proficiency in Python for numerical validation. Experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, other domain-specific libraries, Stata, or other programming languages is also acceptable. At least 2 years of relevant professional experience in applied, research, or teaching roles. Strong written English skills (C1 proficiency or above). Professional certifications (such as CMME, SAS Certifications, CAP) and experience with international or applied projects are a plus. 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 workload may vary and is not guaranteed. This estimate applies only when a project is active. Compensation Contributors can earn up to $16 per hour, depending on experience and the pace of contributions. Pay rates may vary between projects based on their scope, complexity, and required expertise.

Toloka AI seeks a freelance Mechanical Engineer with advanced Python skills to contribute to AI training projects. This contract position is fully remote and open to professionals located in Belo Horizonte or anywhere in the State of Minas Gerais, Brazil. Key responsibilities Integrate mechanical engineering expertise into AI training workflows Utilize Python for data processing, automation tasks, or model-related development Work closely with Toloka AI teams to align on project objectives and deliverables Remote work details This role offers full remote flexibility. Candidates must reside in Belo Horizonte or within the broader Minas Gerais region.

Toloka AI seeks a Freelance AI Trainer with expertise in both biology and Python. This remote role focuses on designing and delivering training sessions that help learners apply artificial intelligence to biological research and related applications. Role overview The Biology and Python Specialist will create educational content and lead sessions for a range of participants. The goal is to make complex AI concepts accessible and relevant within the context of biology. What you will do Develop and present training materials that connect AI techniques with real-world biological problems Engage learners through clear explanations and practical examples using Python Adapt content to suit different backgrounds and experience levels Requirements Strong background in biology Proficiency in Python programming Interest in education and technology This freelance position is open to candidates based in Belo Horizonte, State of Minas Gerais, Brazil, and offers full remote flexibility.

Please submit your CV in English and indicate your English proficiency level. Mindrift connects specialists with project-based assignments to help technology companies assess, test, and improve AI systems. All work is project-based and does not constitute permanent employment. Role overview This freelance role is designed for electrical engineers with Python expertise who want part-time, flexible projects. Contributors support AI training and evaluation by tackling engineering challenges that require both domain knowledge and programming skills. What you will do Design computational engineering problems that reflect real-world processes Create Python-based problems for engineering calculations and simulations Develop tasks that require significant computation, often using numerical methods or iterative techniques Focus on system design, optimization, and analytical problem-solving Base assignments on current research challenges or practical engineering scenarios Validate solutions in Python, using standard engineering libraries Write clear problem statements and provide verified answers Requirements Degree in Electrical Engineering or a related discipline Proficiency with Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar tools is also valued At least two years of professional experience in applied work, research, or teaching Strong understanding of engineering constraints and practical approximations Excellent written English at C1 level or above Professional certifications (such as CMME, SAS Certifications, CAP) and international or applied project experience are considered a plus How projects work Apply Pass qualifications Join a project Complete assigned tasks Receive compensation Project commitment During active project phases, expect to contribute an estimated 10–20 hours per week, depending on project needs. Actual hours may vary. Compensation Contributors can earn up to $14 per hour, depending on the nature and complexity of the project. Pay rates may differ across assignments based on requirements and scope. This is a remote, project-based position open to candidates based in Belo Horizonte, State of Minas Gerais, Brazil.

Please submit your CV in English and include your English proficiency level. This contract role supports toloka-ai through Mindrift, focusing on building and evaluating datasets that measure how well AI coding agents perform real-world developer tasks. The position is project-based and not a permanent employment opportunity. Role overview The Freelance AI Agent Evaluation Engineer creates and refines simulated development environments to test advanced AI models. The work centers on designing authentic scenarios that mirror the challenges developers face, ensuring that AI agents are thoroughly evaluated in realistic contexts. What you will do Build virtual companies from scratch, including codebases, infrastructure, and supporting materials like documentation, conversations, and tickets to establish convincing development histories. Curate and refine tasks drawn from different stages of the virtual company, draft prompts, set evaluation criteria, and ensure tasks are solvable and assessed fairly. Design assignments within isolated environments that resemble a developer's workstation, using a Linux machine equipped with development tools, MCP servers (repository, task tracker, messenger, documentation), and a working web application codebase. Write tests that accept all correct solutions while rejecting incorrect ones, carefully balancing strictness to avoid excluding valid approaches or allowing flawed solutions. Collaborate with AI agents to ensure tests catch real issues, support valid solutions, and do not miss poor ones. Review code generated by AI agents, analyze factors behind success or failure, and design edge cases and adversarial scenarios to challenge the models. Iterate on your work based on feedback from expert QA reviewers who assess your output against quality standards. What this role does not involve Data labeling Prompt engineering Writing code from scratch (the AI agent handles most coding; the focus here is on guidance and evaluation) Collaboration with AI models is central to this work. Crafting tasks that truly test advanced models requires both technical expertise and creativity in using these systems as part of the process. Location Remote , Belo Horizonte, State of Minas Gerais, Brazil

Toloka-AI seeks a Computer Science Specialist with advanced Python expertise to join AI-focused initiatives. This fully remote role is based in Belo Horizonte, State of Minas Gerais, Brazil, and centers on building impactful systems in artificial intelligence. What you will do Work closely with a team to design and develop AI-driven solutions Create and maintain Python-based systems that address practical challenges Contribute to projects that push forward AI capabilities at Toloka-AI Requirements Solid foundation in computer science principles High level of proficiency in Python programming Genuine interest in advancing AI with real-world applications Ability to collaborate effectively in a remote setting

Join cxg as a Freelance Luxury Brand Evaluator based in Belo Horizonte or Rio de Janeiro. In this role, you will assess luxury brands and provide valuable insights to enhance their market presence.

Join the Inter team!At Inter, we believe that the future is shaped every day through the technology you develop, the connections you foster, and the ideas you bring to life. We are a comprehensive Super App offering complete digital banking solutions, investment opportunities, credit options, insurance, a marketplace, and various everyday services. But we are much more than that; we are a dynamic team that is always evolving.With this pace of innovation, new opportunities arise. Now is your chance to explore this smart way to invest in your career. Come and be part of #sanguelaranja!About the Position and MissionIn this role, you will create intelligent solutions using Generative AI that transform how people interact with technology. Your primary focus will be on developing advanced prompt engineering systems and implementing GenAI models that deliver innovative and precise experiences. More than just implementation, we want you to participate in AI architecture decisions and help enhance our capacity to create truly intelligent products.Your Daily Responsibilities:Develop Python applications integrated with GenAI models (OpenAI, Anthropic, Gemini)Create and optimize prompts for various use cases and domainsWork with frameworks like LangChain, LlamaIndex, and LangGraph for orchestration and creation of LLM agentsIntegrate language model APIs into distributed systemsParticipate in AI architecture decisions and best practices

Toloka AI seeks a Freelance English Writer to contribute to ongoing AI development projects. This remote contract role is based in Belo Horizonte, State of Minas Gerais, Brazil. The main focus is supporting the improvement of machine learning models as an AI Trainer. Responsibilities Create and edit English-language content used for AI training Refine and update existing materials to enhance the quality and accuracy of machine learning outputs Location This position is remote, with a base in Belo Horizonte, State of Minas Gerais, Brazil.

toloka-ai is hiring a Freelance Junior Journalist - AI Trainer for remote work based in Belo Horizonte, State of Minas Gerais, Brazil. This role supports content creation and helps train AI systems. Responsibilities Provide accurate data and detailed feedback to help improve AI models Use AI tools and follow established workflows to complete content-related tasks Develop journalistic skills while working in a rapidly evolving field Requirements Interest in journalism and new AI technologies Willingness to learn and adapt as the field changes Strong ability to deliver clear, high-quality input and thoughtful insights