AI Trainer - Coding Specialist (Fluent in Portuguese - Brazil)

Are you a coding aficionado fluent in Portuguese (Brazil) with a passion for shaping the future of artificial intelligence? As large-scale language models evolve from sophisticated chatbots into powerful tools for scientific exploration, we recognize that high-quality training data is pivotal. Your expertise will play a crucial role in empowering the next ge…

Gramian Consultancy seeks an AI Evaluation Engineer to focus on agentic coding models and software engineering workflows. This remote contractor role is open to candidates based in Brazil, as well as Bangladesh, Colombia, Egypt, Ghana, India, Indonesia, Kenya, Nigeria, Turkey, and Vietnam. Role overview This assignment centers on hands-on evaluation of model-generated code. Daily work involves performing real coding tasks, reviewing outputs from agentic coding models, and providing detailed feedback on correctness and quality. Strong debugging ability and careful attention to detail are essential, as success depends on accurately judging code in practical scenarios. The contract requires a commitment of 8 hours per day, with at least 4 hours overlapping with Pacific Standard Time (PST). The initial term is 5 weeks or longer. This is a contractor position and does not include medical or paid leave. What you will do Carry out coding tasks in agentic coding environments, following established evaluation protocols Assess model-generated code for completeness and accuracy Validate outputs by reviewing code, running tests, analyzing logs, and inspecting artifacts Use scripts, tests, and manual checks for targeted validation Document clear, evidence-based rationales for each evaluation and ranking Design realistic, multi-step coding tasks and workflows for offline evaluation Create and refine evaluation rubrics and scoring criteria Maintain consistency, quality, and compliance across all evaluations Identify and report issues in environments, instructions, or workflows, providing clear evidence Interview process The interview process includes a 60-minute take-home assessment.

Please submit your CV in English, including your proficiency level.Mindrift connects talented specialists to project-based AI opportunities with leading technology firms, focusing on the critical tasks of testing, evaluating, and enhancing AI systems. Note that participation is project-based and does not constitute permanent employment.Key Responsibilities:Each project presents distinct tasks, where contributors may be required to:Create original computational statistics challenges that emulate actual mathematical research workflows.Develop problems that necessitate Python programming solutions (utilizing Numpy, SciPy, Sympy).Ensure problems are computationally demanding, making manual solutions impractical within reasonable timelines (days/weeks).Formulate problems that involve complex reasoning chains in fields such as number theory, combinatorics, graph theory, and numerical analysis.Ground problems in real research scenarios or practical applications drawn from mathematical practice.Validate solutions using Python with standard mathematical libraries.Clearly document problem statements and provide verified correct answers.Qualifications:This opportunity suits statistics experts with Python experience who are open to part-time, temporary projects. Ideal candidates will possess:A degree in Statistics or related disciplines.Proficiency in Python for numerical validation; knowledge of MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar programming languages may be considered equivalent.At least 2 years of relevant professional experience, which can include applied, research, or teaching roles.Strong written English skills (C1+).Professional certifications (e.g., CMME, SAS Certifications, CAP) and involvement in international or applied projects are advantageous.How It Works:Apply → Pass qualifications → Join a project → Complete assigned tasks → Receive payment.Project Time Expectations:During active phases, tasks are expected to require approximately 10–20 hours per week, based on project needs. This is a guideline and not a guaranteed workload.Compensation:Contributors can earn up to $16 per hour, depending on experience and contribution pace. Compensation may vary across different projects based on their scope, complexity, and required expertise.

Join our innovative team as a Fractional Senior Full Stack Engineer specializing in Stabilization and AI-Generated Code. In this role, you will be pivotal in developing cutting-edge software solutions that leverage AI technologies to enhance code efficiency and reliability. You will collaborate with a dynamic team of engineers and product managers, contributing to projects that push the boundaries of technology.

Please submit your CV in English and indicate your level of English proficiency.At Mindrift, we specialize in connecting talented professionals with dynamic, project-based AI opportunities for top tech companies. Our focus is on testing, evaluating, and enhancing AI systems. Please note that participation is project-based and not a permanent employment position.What You Will Do:As a contributor, you will engage in various projects that may include:Designing original computational engineering problems that replicate authentic engineering workflows;Creating problems that necessitate Python programming for engineering calculations and simulations;Ensuring that problems are computationally intensive and involve numerical methods or iterative solutions;Developing problems centered on system design, optimization, and analysis;Base problems on genuine research challenges or practical applications in engineering;Verifying solutions using Python with established engineering libraries;Clearly documenting problem statements and providing verified correct answers.Your Qualifications:This role is ideal for engineers with experience in Python who are open to part-time, non-permanent projects. The ideal candidate should possess:A degree in Mechanical Engineering or a related field;Proficiency in Python for numerical validation; knowledge of MATLAB, R, C, SQL, Numpy, Pandas, SciPy, domain-specific libraries, Stata, or any programming language can be considered equivalent;At least 2 years of professional experience, with applied, research, or teaching experience being applicable;A solid understanding of practical engineering constraints and approximations;Excellent written English skills (C1+ level);Professional certifications (e.g., CMME, SAS Certifications, CAP) and experience with international or applied projects are advantageous.How the Process Works:Apply → Pass qualifications → Join a project → Complete tasks → Get compensated.Project Commitment:Tasks are expected to require approximately 10–20 hours per week during active project phases, depending on project demands. This is an estimate and not a guaranteed workload, applicable only while the project is ongoing.Compensation:Contributors can earn up to $14 per hour, depending on their level of expertise and contribution pace. Compensation varies across projects based on scope, complexity, and required skills. Please be aware that other projects may offer different earning potentials based on their specific needs.

Encora is hiring a Senior AI Specialist based in Brazil. This is a full-time, work-from-home position. Role overview This role focuses on advanced artificial intelligence projects. The Senior AI Specialist will apply AI expertise to support Encora's initiatives and drive results in a remote setting. Location and schedule Location: Brazil Schedule: Full-time Work mode: Remote (work from home) What to expect As a Senior AI Specialist, expect to contribute to AI-driven solutions while collaborating remotely with colleagues. The position offers the flexibility of working from home and requires a strong background in artificial intelligence.

iFood Carreiras seeks a Data/AI Specialist in Osasco, São Paulo. The role centers on using data analytics and artificial intelligence to refine company operations and support better decision-making. Key responsibilities Collaborate with teams throughout the company to analyze large, complex datasets Create predictive models that align with business objectives Apply AI-driven approaches to address practical business challenges Promote data-informed decisions and foster continuous improvement Location This position is located at the iFood Carreiras office in Osasco, São Paulo, Brasil.

We invite you to submit your CV in English, including your English proficiency level.Mindrift connects talented specialists with project-based AI opportunities at leading technology companies, focusing on the testing, evaluation, and enhancement of AI systems. Please note that participation is project-based and does not constitute permanent employment.Overview of the OpportunityEach project will have distinct tasks, and contributors may be required to:Design innovative engineering problems that accurately represent real engineering processes;Develop Python-based solutions for engineering calculations and simulations;Create computationally intensive problems that necessitate numerical methods or iterative problem-solving;Work on system design, optimization, and analysis challenges;Base problems on actual research issues or real-world engineering applications;Utilize Python with standard engineering libraries to verify solutions;Clearly document problem statements and provide verified correct answers.Qualifications We SeekThis role is ideal for engineers with Python expertise who are interested in part-time, project-based work. The most qualified candidates will possess:A degree in Electrical Engineering or a related field;Proficiency in Python for numerical validation, with familiarity in MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or other domain-specific libraries being advantageous;A minimum of 2 years of professional experience, which can include applied work, research, or teaching;A solid understanding of practical engineering constraints and methodologies;Strong written English communication skills (C1+ level);Professional certifications (e.g., CMME, SAS Certifications, CAP) and experience in international or applied projects are highly valued.How the Process Works1. Apply → 2. Pass qualification(s) → 3. Join a project → 4. Complete tasks → 5. Get compensatedProject Time ExpectationsFor this opportunity, tasks are estimated to require approximately 10–20 hours per week during active project phases, based on specific project needs. Please note that this is an estimate and not a guaranteed workload, applicable only while the project is active.CompensationContributors can earn up to $14 per hour, depending on their expertise and contribution level. Compensation may vary across projects based on scope, complexity, and required skills. Please note that different projects on the platform may offer varying compensation levels.

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

Jobgether is seeking an AI Automation Specialist/Engineer for a fully remote position based in Brazil. This role supports a partner company focused on legal operations, with key projects in lead generation, data processing, and client acquisition workflows. Role overview This position centers on building intelligent automation systems that streamline legal business processes. The work involves designing solutions that improve how data is gathered, processed, and used to drive client engagement. What you will do Create and implement AI-driven tools to extract, organize, and refine data from various sources Connect processed data with CRM and outreach platforms Work closely with leadership to spot high-impact automation opportunities Develop scalable, production-ready systems that enhance efficiency throughout the lead lifecycle, from data intake to client engagement Requirements Technical expertise in automation engineering, data management, and integrating systems Hands-on experience with modern AI tools Strong problem-solving skills for workflow and data challenges Ability to work independently in a remote, technical environment Location This is a remote position based in Brazil.

Join bv as an AI Agent Skills Governance Specialist, where you will play a pivotal role in overseeing and optimizing the skills and performance of our AI agents. This position will require you to ensure that our AI systems are functioning effectively, providing insights for continuous improvement, and adhering to governance standards.

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.

At bv, we pride ourselves on being one of the largest private banks in Brazil, as recognized by the Central Bank's ranking. For the second consecutive year, we have been honored as the best financial institution to work for in Brazil, according to the GPTW 2025 ranking! We also received the Diversity seal in the Women's category, reinforcing our commitment to equity.Our culture is genuinely lived out: we are simple, correct, collaborative, and courageous. We value relationships, innovation, and a light work environment that is increasingly collaborative and intentionally advancing diversity and inclusion.We are in a constant state of evolution and are building successful partnerships to fulfill our purpose of making the financial lives of individuals and businesses easier.Do you resonate with this mission? If so, we would love for you to join our team!We are on the lookout for a Specialist in Analytics Engineering and AI to serve as a technical reference and accelerate our journey in data and artificial intelligence. This senior role involves substantial engagement in modern data engineering and applied AI, acting as a bridge between data pipelines, analytical modeling, data products, and intelligent solutions. The individual will be responsible for evolving our Lakehouse, structuring analytical transformation practices and models, ensuring data governance and quality, and enabling AI cases such as RAG, internal agents, and predictive models. We seek a senior professional with a platform vision, strong structuring ability, technical influence, excellent communication skills, and the capability to connect Analytics Engineering and AI comprehensively.

At Mindrift, we specialize in connecting top-tier specialists with dynamic project-based opportunities in the field of AI for leading technology firms, focusing on the testing, evaluation, and enhancement of AI systems. Please note that participation is project-based and does not constitute permanent employment.About the PositionAs a Procurement and Supply Chain Specialist in this role, you will leverage your extensive hands-on experience to craft realistic disruption scenarios. You will be responsible for defining expected outcomes and mitigation strategies, while also evaluating AI-generated recommendations for their accuracy, completeness, and relevance to business needs.Key ResponsibilitiesWhile each project entails unique tasks, contributors may engage in:Creating realistic scenarios of supply chain disruptions (such as supplier delays, quantity adjustments, logistics complications, and quality failures) based on actual manufacturing and procurement contexts.Establishing expected outcomes and suitable strategies for mitigation for each disruption scenario.Assessing AI-generated outputs against real-world business logic for accuracy and relevance.Reviewing outputs for accuracy, completeness, and applicability within ERP environments, particularly in systems like Microsoft Dynamics 365, Coupa, Jaggaer, and Ariba (SAP).Participating in structured data creation and validation tasks in alignment with established guidelines and frameworks.We Seek Candidates Who Have:A minimum of 4 years of direct experience in procurement, supply chain, or purchasing, preferably in a manufacturing context.A robust understanding of procurement workflows, including purchase orders, vendor management, inventory, and production planning processes.Hands-on experience with ERP systems such as SAP, Oracle, or Microsoft Dynamics 365.A proven capability to devise and analyze supply chain disruption scenarios and their mitigation strategies.A solid grasp of various disruption types, including delays, shortages, quality issues, and logistics challenges.Knowledge of Incoterms and logistics management.Familiarity with Bill of Materials (BOM) structures and production planning methodologies.Experience with supplier performance metrics such as On-Time In-Full (OTIF), lead times, and quality scores.An analytical mindset with the ability to evaluate AI outputs against real-world business logic.Experience in data validation, structured data entry, or annotation tasks.Proficient written communication skills in English.Application ProcessTo apply, submit your application, pass the qualification assessments, join a project, complete assigned tasks, and receive compensation for your contributions.Project Time ExpectationsThis project is expected to require approximately 10-20 hours per week during active phases, depending on project demands. Please note that this is an estimated workload and is not guaranteed.CompensationContributors can earn up to $50 per hour based on experience and project requirements.

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.

Gramian Consultancy seeks an AI Evaluation Engineer with a strong background in software engineering and coding. This remote contract role is open to candidates based in Brazil, as well as Bangladesh, Colombia, Egypt, Ghana, India, Indonesia, Kenya, Nigeria, Turkey, and Vietnam. Role overview This position centers on creating and implementing benchmark tasks that reflect real-world software engineering challenges. The work involves evaluating AI systems by designing scenarios where codebases require targeted changes, such as bug fixes, refactoring, or migrations, and then verifying the accuracy of AI-generated solutions. What you will do Create and implement multi-agent benchmark tasks that simulate practical code modifications, including bug fixes, migrations, and refactoring. Apply the Harbor evaluation framework to run and validate tasks in containerized environments. Draft clear task instructions, specifying file paths, function signatures, expected behaviors, and constraints. Write Python validation scripts to check the correctness of code changes. Decompose complex tasks into steps for specialized agents. Review large open-source codebases to identify realistic scenarios for tasks. Run, debug, and refine tasks within Docker to ensure they are reproducible. Iterate on task quality and complexity based on evaluation feedback. Key details Contract type: Contractor assignment (no medical or paid leave) Duration: 4 weeks or longer Schedule: 8 hours per day, with at least 4 hours overlapping Pacific Standard Time (PST) Interview process: Take-home assessment Gramian Consultancy is a boutique firm specializing in IT professional services and engineering talent solutions. The team focuses on software engineering and leadership, helping organizations build effective teams by connecting them with professionals who match their needs.

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.

Are you a passionate expert in the Portuguese language (Brazil) ready to influence the evolution of artificial intelligence? As advanced language models transition from basic chatbots to sophisticated linguistic tools, your role is pivotal. With your high-quality training data, the future of AI can provide world-class education, keep up with cutting-edge research, and enhance communication for Portuguese speakers globally. It all starts with you—your expertise is essential in powering the next generation of AI. We are seeking Portuguese (Brazil) language specialists who have a deep understanding of phonetics, morphology, syntax, semantics, pragmatics, and sociolinguistics. You will engage with advanced language models on various linguistic challenges, such as verb conjugation, noun-adjective agreement, sentence structure, word order, accentuation, and colloquial expressions. Your documentation of any issues will be crucial in refining model reasoning. On a typical day, your tasks will involve conversing with the model on language scenarios, verifying factual accuracy and logical coherence, capturing reproducible error traces, and recommending enhancements to our prompt engineering and evaluation metrics. A Master’s degree or PhD in Portuguese language, linguistics, or a related field is preferred. Experience with peer-reviewed publications, teaching, or hands-on linguistic analysis projects will indicate a strong fit for this role. Clear, metacognitive communication skills—essentially “showing your work”—are crucial. Are you ready to leverage your Portuguese language expertise to contribute to the knowledge base of tomorrow’s AI? Apply now and help shape the model that will educate the world! We offer a competitive pay range of $8 to $65 per hour, with the final rate determined based on your experience, expertise, and geographic location. Please note that as a contractor, you will need to provide a secure computer and high-speed internet; benefits such as health insurance and PTO are not applicable.

Are you excited about the future of AI and possess expertise in both text and multimedia content analysis?We are seeking meticulous linguists who are native speakers of Brazilian Portuguese to assist with AI training initiatives. Responsibilities include evaluating prompts, comprehending video content, reviewing and correcting text, among other tasks.This is a remote freelance position.