Freelance AI Trainer - Data Annotation Specialist

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 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 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. 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.

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.

Join us at Inter!At Inter, we believe that each day holds the potential for innovation through the technology you develop, the connections you forge, and the ideas you share. We are not just a Super App; we provide comprehensive digital banking solutions, including investments, credit, insurance, a marketplace, and various everyday services. More importantly, we are a dynamic team that is always evolving.Our rapid growth presents exciting new opportunities. Now is your chance to explore this intelligent approach to advancing your career. Come and be part of our vibrant culture! #sanguelaranja!About the Position and MissionYou will be an integral part of a strategic tribe that serves as one of the top centers of data excellence within our organization. This area is tasked with transforming data into genuine value for the business by merging advanced data engineering with applied data science, consistently focusing on the company’s strategic objectives.In this role, you will take on a pivotal position in both technical and personnel leadership, ensuring the delivery of impactful data solutions that support strategic decision-making and directly enhance the customer experience.Your Daily ResponsibilitiesLead and develop a team of data engineers across various levels of seniority.Define the technical vision, strategies, and roadmaps aligned with business objectives.Plan resource allocation...

Join the Inter family!At Inter, we believe that every day brings new opportunities to innovate through technology, build connections, and share ideas. We are a comprehensive Super App offering digital banking solutions, investments, credit, insurance, a marketplace, and many other everyday services. More than just a platform, we are a dynamic team that is always evolving.Now is your chance to embrace an intelligent approach to career development. Come be a part of our journey! #sanguelaranja!About the Role and MissionYou will join a specialized team of professionals, collaborating alongside 1 expert and 3 other specialists in a high-performance environment. This is a senior and strategic position where you will serve as a technical reference and mentor for the team.Your Daily Responsibilities:Translate business needs into technical data engineering solutions.Design robust and scalable data architectures.Implement end-to-end data engineering solutions.Mentor and be a technical reference for colleagues of varying seniority.

Please submit your CV in English and indicate your English proficiency level. toloka-ai, through the Mindrift platform, offers project-based freelance work focused on evaluating, testing, and improving AI systems for leading technology companies. This is not a permanent position; assignments are tied to specific projects. Key responsibilities Create original optics challenges that reflect real research processes in physics. Design computationally intensive problems that require computer-based solutions. Develop tasks involving advanced reasoning in mechanics, electromagnetism, thermodynamics, and quantum mechanics. Base problem sets on real-world research questions or practical scenarios in optics and physics. Document problem statements clearly and provide accurate, verified solutions. Requirements Degree in Physics (theoretical, experimental, or computational) or a closely related field. Minimum of 2 years in applied, research, or teaching roles. Experience with numerical simulation methods. Ability to construct problems that mirror authentic research approaches in physics. Creative mindset for developing problems across various physics domains. Knowledge of physics modeling and approximation techniques. Strong written English skills at C1 level or higher. Project workflow Apply Pass qualification steps Join a project Complete assigned tasks Receive compensation Time commitment During active projects, expect to dedicate approximately 10 to 20 hours per week. Actual hours may vary and are only required while a project is in progress. Compensation Rates are up to $14 per hour, depending on experience and the complexity of the tasks. Compensation may differ between projects based on their requirements. Location This freelance remote position is based in Belo Horizonte, State of Minas Gerais, Brazil.

Join Bluelight Consulting as a Fullstack Engineer specializing in Python and React! In this dynamic role, you will be instrumental in developing innovative web applications that enhance our clients' capabilities. You will work collaboratively with cross-functional teams to design, implement, and maintain robust software solutions.

Seja parte da Inter!Na Inter, acreditamos que o futuro se constrói todos os dias através da tecnologia que você desenvolve, das conexões que você estabelece e das ideias que você compartilha. Somos um Super App que oferece soluções abrangentes em banco digital, investimentos, crédito, seguros, marketplace e outros serviços do dia a dia. E também somos muito mais: um time excepcional em constante evolução.Este ritmo dinâmico abre novas oportunidades. É a sua chance de descobrir uma forma inteligente de investir na sua carreira. Venha fazer parte da nossa equipe!#sanguelaranja!Sobre a vaga e a missão do cargo:Você integrará a equipe de Engenharia de Produtos DATA & AI, cuja missão é gerar valor a partir de dados no contexto dos produtos do SuperApp da Inter. Atuamos de forma abrangente, desde a engenharia até a ciência de dados, sempre alinhados com os objetivos de negócio. Nossa entrega envolve a disponibilização e transformação de dados no ecossistema do Inter.

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

Join Inter with us!!!At Inter, we believe that the future begins every day, with the technology you create, the connections you develop, and the ideas you share. We are a Super App providing comprehensive digital banking solutions, investments, credit, insurance, a marketplace, and various daily services. But we are even more: a super team in constant evolution.This vibrant pace opens up new opportunities. It's your turn to discover this intelligent way to invest in your career. Come and be part of our #sanguelaranja!About the role and missionYou will be part of our Data Platform team, responsible for maintaining and evolving our data platform. Your mission is to structure components so that pipelines operate with high availability, ensuring data is reliable and accessible throughout the organization, and that the infrastructure scales efficiently and securely. You will act as a guardian of operational stability, resolving critical incidents, optimizing performance, implementing governance improvements, and collaborating closely with analytics, engineering, and business teams to enable informed decision-making.

Banco Inter, recognized for launching Brazil's first digital bank, has evolved into a global financial super app. The company emphasizes technology-driven solutions and aims to reshape the financial sector through purposeful work. Team members, known as Sangue Laranja, share a strong commitment to innovation and progress. Role overview The Data Analyst II - Digital Credit position is part of the Credit Operations group, with a focus on Personal Credit. This role supports daily data operations and contributes to broader business analysis within the team. What you will do Process, clean, and transform data using SQL to ensure quality and consistency for ongoing analysis. Support the development of analyses and automations with Python to enhance departmental data processes. Build and maintain dashboards in Tableau or similar tools, translating data into clear visualizations for monitoring key indicators. Respond to data requests from the International Products team, assisting with analyses that guide product and business decisions. Create operational and management reports on KPIs and indicators to track business performance. Develop and refine SQL queries to analyze user behavior and experience, and to support financial analysis of products. Conduct data investigations following established guidelines and methodologies. Location This position is based in Belo Horizonte, MG.

Bluelight Consulting is at the forefront of software consultancy, specializing in the creation of innovative technology solutions designed to enhance user experiences. We are dedicated to providing top-tier service to our clients, with an unwavering focus on quality and customer satisfaction. Our mission extends beyond the development of cutting-edge applications; we aim to cultivate a collaborative and enriching workplace where every team member can flourish. With our presence spanning the United States and Central/South America, Bluelight is entering an exciting phase of growth, actively seeking outstanding talent to join our vibrant and diverse community.We are on the lookout for a talented Fullstack Engineer to become a vital part of our rapidly expanding team at Bluelight Consulting. This role is perfect for individuals who thrive in a fast-paced, dynamic environment where all contributions are valued. You will have the chance to engage in exciting and impactful projects, developing high-quality applications that make a difference in the marketplace. We prioritize continuous learning and personal development, offering a collaborative atmosphere that fosters professional growth. If you are passionate about software development and eager to be part of a growing consultancy, we encourage you to apply and join us on this thrilling journey.

Toloka Annotators brings people from around the world into the process of building generative AI by involving them directly in data creation. The team helps shape AI systems with real-world input by connecting individuals to projects from top technology companies. Role overview This freelance, remote role centers on recording everyday household activities to help train AI vision models. The position welcomes candidates globally, including those in Belo Horizonte, State of Minas Gerais, Brazil. Work involves capturing point-of-view videos of routine home tasks such as washing dishes, vacuuming, walking the dog, or folding laundry. Payment is provided for each qualifying video submitted. What you will do Record hands-on household tasks in your home using a smartphone or camera. Document activities such as cleaning, laundry, washing dishes, and mapping out home layouts. Follow detailed instructions to ensure videos meet standards for quality, variety, and location. Requirements Equipment: Smartphone or camera that records at least 1080p resolution at 30fps or higher. Recording method: Mount the device at forehead or eye level, angled down to keep hands visible for an egocentric view. Software: Use the provided 'D&A' app to capture and upload all footage. Quality standards: Submit clear, stable, well-lit videos (minimum 15 seconds each) showing real, uninterrupted household tasks. Benefits Earn up to $5 per hour, depending on the project, while completing your regular household chores. Freelance, project-based work lets you choose tasks that fit your schedule. Play a part in improving how AI communicates and understands the world.

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

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 resume in English and include your English proficiency level. Toloka offers freelance projects that support artificial intelligence development. The company connects people worldwide to tasks that improve AI systems. More information is available at toloka.ai. Toloka Annotators works with leading technology companies on Generative AI projects. The team brings together individuals from many countries to provide real human input, helping AI systems become more accurate and reliable. Role overview Freelance AI Trainers and Annotators help AI systems better understand language and information. When projects are active, tasks may include evaluating AI-generated content, fact-checking, or comparing different online responses. Main responsibilities Review data such as text, images, or videos for each project Tag or categorize content according to project guidelines Identify and report content that is factually incorrect, sensitive, inappropriate, or unclear Project details This is a project-based freelance role. Tasks are available only when projects are active. Invitations to participate depend on your profile and current needs. Work is remote from Belo Horizonte, State of Minas Gerais, Brazil. Compensation Pay depends on the project scope and required skills. AI trainers and annotators can earn up to $9 per hour for certain projects.