Looking for remote AI training or data labeling work open to applicants located in Portugal? OpenTrain is the hiring organization for these roles. Candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. Each live posting determines eligibility and provides the responsibilities, qualifications, hours, location rules, pay, and other details for that role.
Use your professional expertise to evaluate AI-generated responses, apply detailed rubrics, and provide feedback that improves model behavior. This part-time remote contract offers 20+ hours per week and pays $140-$200 per hour.
Posted Aug 4, 2026
Use strategy, consulting, and professional writing expertise to evaluate AI outputs, improve business documents, and refine prompts. This worldwide, part-time contract offers 20+ hours per week at $100-$200 per hour.
Posted Aug 4, 2026
Use five or more years of travel expertise to evaluate and improve AI-generated travel content, booking scenarios, and customer responses. Remote contractor work pays $20-$35 per hour and requires 20+ hours weekly.
Posted Aug 3, 2026
Support the future of AI by sourcing, interviewing, and evaluating skilled contributors for training projects. This remote contractor role offers $30 to $42 per hour and 20+ hours per week.
Posted Aug 3, 2026
Use five or more years of B2B sales development experience to shape AI training data through prospecting, qualification, CRM expertise, and practical feedback. This worldwide, part-time contractor role pays $30 to $42 per hour.
Posted Aug 3, 2026
Use your certified personal-training expertise to evaluate fitness programs, exercise safety, motivation, and instructional content for AI development. This worldwide, part-time contract offers $25-$40 per hour and requires 20+ hours weekly.
Posted Aug 3, 2026
Use your personal assistance and administrative expertise to help improve next-generation AI systems. Work remotely worldwide for $20-$34 per hour with a 20+ hour weekly commitment.
Posted Aug 3, 2026
Use advanced physics expertise to evaluate AI-generated and researcher-created solutions, derivations, and theoretical arguments. This worldwide, part-time contractor role pays $80-$150 per hour and requires less than 20 hours weekly.
Posted Aug 3, 2026
Use computational biology, cheminformatics, and Python to build benchmarks and evaluate AI systems for computational drug discovery. This worldwide contractor role offers $80-$110 per hour and requires 20+ hours weekly.
Posted Aug 3, 2026
Use PhD-level physics expertise to adjudicate competing AI model solutions, assess assumptions and approximation limits, and write rigorous evaluations. This worldwide, part-time contract pays $80 to $160 per hour.
Posted Aug 3, 2026
Review and annotate robotics video to help train next-generation AI systems. This worldwide, entry-level contractor role offers flexible work of 20+ hours per week at $7 per hour.
Posted Aug 3, 2026
Record natural, high-quality European Portuguese audio to help improve AI speech recognition and language understanding. This remote contract offers flexible scheduling and $20 to $40 per hour based on experience.
Posted Aug 3, 2026
Create high-fidelity Brazilian Portuguese audio samples for next-generation AI systems in a remote contractor role paying $20-$40 per hour. Bring professional recording experience, strong equipment skills, and native-level Portuguese fluency.
Posted Aug 3, 2026
Use advanced quantum optics expertise to benchmark AI training work involving interferometry, squeezing, optical loss, and quantum noise. This remote contractor project offers approximately 10 hours per week for 8 to 10 weeks.
Posted Aug 2, 2026
Use advanced expertise in holography, AdS/CFT, and mathematical physics to review and adjudicate AI-generated solutions. Work remotely for 10 hours weekly over 8 to 10 weeks at $80 to $160 per hour.
Posted Aug 2, 2026
Apply your expertise in condensed matter magnetism to specialized remote AI training work. Analyze magnetic structures, neutron scattering data, space groups, and magneto-optic signatures for 8 to 10 weeks at about 10 hours weekly.
Posted Aug 2, 2026
Apply your expertise in condensed matter and quantum information physics to a research-level AI benchmark. Work remotely for about 10 hours per week over 8 to 10 weeks on exact diagonalization, symmetry methods, and quantum many-body analysis.
Posted Aug 2, 2026
Use advanced chemistry expertise to improve next-generation AI through experimental analysis, clear documentation, and model-training insights. This flexible remote contract pays $70-$90 per hour for 20+ hours weekly.
Posted Aug 2, 2026
Play selected PC games, capture synchronized video and telemetry, annotate gameplay events, and identify bugs and data issues. This flexible remote contractor role pays $10 to $14 per hour and requires at least 20 hours weekly.
Posted Aug 2, 2026
Evaluate Spanish chatbot responses for realistic small business scenarios, from customer interactions to marketing and operations. Create prompts, compare outputs, and provide structured feedback in a flexible remote contract role.
Posted Aug 1, 2026
Probe conversational AI with jailbreaks, prompt injections, and multi-turn attacks while producing safety data and reproducible vulnerability reports. This remote contractor role supports 20+ hours per week at $48 to $62 per hour.
Posted Jul 31, 2026
Create high-quality Mandarin voice recordings that help train AI systems. This flexible, worldwide contractor role offers $20-$40 per hour for about 20 hours weekly over 1-3 months.
Posted Jul 30, 2026
Create natural, studio-quality German voice samples that help train next-generation AI systems. This remote contractor role offers 20+ hours per week and pays $20-$40 per hour.
Posted Jul 30, 2026
Record high-fidelity Italian speech for AI training from anywhere in the world. This flexible contract role offers $20-$40 USD per hour for experienced audio and voice professionals with quality recording equipment.
Posted Jul 30, 2026
Review, critique, and generate examples for AI model outputs in a flexible remote contractor role. Work 20+ hours weekly and earn $100 to $180 per hour.
Posted Jul 30, 2026
Use advanced semiconductor and microelectronics expertise to evaluate technical data, explain device physics, and help train next-generation AI systems. This flexible contract role offers 20+ hours per week at $66 to $130 per hour.
Posted Jul 30, 2026
Help train next-generation AI by solving advanced mechanical engineering problems and evaluating technical answers for accuracy, feasibility, manufacturability, and reliability. This worldwide, part-time contract pays $60-$100 per hour.
Posted Jul 30, 2026
Use your electrical engineering expertise to evaluate AI-generated circuit design answers across analog, digital, mixed-signal, power, and RF systems. This remote, project-based contractor role offers flexible work at up to $130 per hour.
Posted Jul 30, 2026
Use expert CAD and mechanical design knowledge to evaluate AI-generated engineering responses, solve advanced design problems, and improve AI reasoning. This remote contract offers flexible part-time work at $60-$130 per hour.
Posted Jul 30, 2026
Create, edit, and review professional Thai speech recordings used in AI training datasets. This remote contractor role offers 20+ hours per week at $10-$30 per hour.
Posted Jul 30, 2026
AI training work involves preparing and reviewing examples used by artificial-intelligence systems. Roles open to applicants located in Portugal can involve annotating images or video, transcribing or recording audio, writing or rating model responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge. The individual live posting explains which responsibilities and requirements apply.
OpenTrain is the hiring organization for roles open to applicants located in Portugal. Candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. Refer to each individual live posting for every other role-specific detail.
