Portuguese Business Document Expert — AI Evaluation

About OpenTrain

OpenTrain is the #1 platform for people building careers in AI training and data labeling. We help contributors find projects, consolidate opportunities across platforms, and build a unified portfolio of AI training work they control.

OpenTrain connects experienced professionals with projects that directly shape how AI systems perform in real business workflows.

Why AI training matters

AI training (also called data labeling or human feedback) is the human side of building modern AI. People prepare, evaluate, and correct model outputs so systems can perform real tasks — from analyzing spreadsheets to drafting business presentations.

This is flexible, largely remote work that lets professionals contribute domain expertise to improve AI behavior while keeping control of their schedules and building a durable freelance career.

The role

OpenTrain is recruiting a Portuguese-speaking Business Document Expert to evaluate and improve AI-generated business deliverables. You will work as a contractor on a part-time engagement for OpenTrain, reviewing documents produced by AI and ensuring they meet professional business standards.

This role focuses on realistic business tasks executed in Excel, PowerPoint, and Word, and requires deep familiarity with professional business formats, accuracy, and polish.

What you'll do

You will collaborate with AI systems and cross-functional teams to evaluate, critique, and improve AI outputs across finance, strategy, marketing, and operations. Deliverables must meet Fortune 500 or consulting-level expectations for clarity and business relevance.

• Execute and validate business tasks using Excel, PowerPoint, and Word produced by AI.
• Provide structured, actionable feedback and ratings on AI-generated documents.
• Design and test realistic business scenarios that mirror professional workflows.
• Annotate and document recurring issues and escalate them for improvement.
• Champion quality, structure, and clarity in all deliverables and communications.

Requirements

You must meet the core qualifications below; we will verify skills during the application and onboarding process.

• Bachelor’s degree or higher in Business, Finance, Economics, Marketing, or a related field.
• 3+ years of professional experience in business functions such as strategy, finance, marketing, operations, sales, or HR.
• Proven mastery of Excel, PowerPoint, and Word for creating professional business deliverables.
• Exceptional analytical, organizational, and written communication skills.
• Acute attention to detail with the ability to provide clear, constructive feedback.
• Fluency in Portuguese (pt) required; work location limited to the United States.
• Familiarity with AI tools (e.g., ChatGPT, Claude, Copilot) or a strong willingness to learn.
• Self-starter comfortable with independent, remote contractor work.

Helpful background (nice to have)

The following experiences are not required but will help you stand out and may lead to higher-impact tasks and faster progression on the project.

• Experience at a Fortune 500 company, top-tier consulting firm, or leading financial institution.
• Background in AI evaluation, prompt engineering, or document automation tools.
• MBA or advanced degree and experience mentoring or providing structured feedback on business deliverables.

Compensation, schedule, and how it works

This is a part-time contractor role requiring 20+ hours per week. The project is remote; you must be based in the United States and fluent in Portuguese.

Pay is hourly with a range of $20–$70 per hour. Tasks focus on document evaluation and some data-collection activities; annotation software is provided (listed as OTHER in project tools).

• Employment type: Contractor, Part-time.
• Time requirement: 20+ hours/week.
• Language: Portuguese (pt); Country: United States only.
• Data type: Documents — label types include evaluation/rating and data collection.

Who should apply and next steps

Apply if you are a business professional with hands-on Office Suite skills, strong attention to detail, and an interest in shaping AI that performs real business work. This role is ideal for consultants, finance or operations professionals, product managers, and senior individual contributors seeking flexible, remote work.

Submit your application through OpenTrain to begin the screening and qualification tasks. If selected, you'll complete a short evaluation to confirm fit and start contributing to OpenTrain's project.