Marketing Documents Specialist (Portuguese)

About OpenTrain

OpenTrain is the #1 platform for finding and building careers in AI training and data labeling. The platform helps people start and grow careers teaching AI by connecting contributors with projects, consolidating opportunities, and supporting a unified AI training portfolio.

About AI training work

AI training is the human side of building intelligent systems: people prepare, review, and refine the examples models learn from. This work is highly accessible, often fully remote and flexible, and provides practical experience shaping how modern AI systems behave.

• Work remotely from anywhere with a computer and internet connection.
• Many projects allow flexible hours and part-time schedules.
• Contributors directly influence model behavior through careful content creation and review.

The role

OpenTrain is recruiting a Marketing Documents Specialist focused on Portuguese-language marketing content for AI training workflows. This is a remote, contractor, part-time role requiring 20+ hours per week.

Pay range: $10–$55 per hour (per the project’s posted rates). You'll collaborate with a project team to produce polished marketing presentations, reports, and spreadsheets used in AI training and evaluation tasks.

• Employment type: Contractor, Part-time.
• Time requirement: 20+ hours/week.
• Data type: DOCUMENT; task types include text generation and evaluation/rating.

What you'll do

You will create, review, and edit Portuguese marketing documents and spreadsheets so they meet client and industry standards and serve AI training needs. Work is collaborative and requires clear bilingual communication.

• Create and polish marketing presentations, reports, and spreadsheets in Portuguese.
• Turn marketing ideas and data into organized, client-ready documents and spreadsheets.
• Review materials for clarity, accuracy, and effectiveness and provide constructive feedback.
• Collaborate with project teams to produce high-quality content for AI training workflows.

Requirements

You must meet the specified baseline qualifications and be able to demonstrate your skills with a portfolio of documents, spreadsheets, and presentations.

• Native-level Portuguese proficiency and excellent written/verbal English.
• Bachelor’s degree in Marketing, Communications, Business, or a related field.
• 3+ years of professional marketing experience creating and managing marketing documents.
• Advanced Microsoft Word, Excel, and PowerPoint skills.
• Portfolio of well-crafted documents, spreadsheets, and presentations.
• Experience supporting or collaborating with Fortune 500 organizations.
• Strong attention to detail and organization while working remotely.

Who should apply

This role is a good fit for marketing professionals who write and format client-facing documents in Portuguese and want flexible, remote contract work that connects them to AI training projects.

• Experienced marketing writers and document specialists with a polished portfolio.
• Bilingual professionals comfortable switching between Portuguese and English.
• Candidates who have supported large or enterprise clients, especially Fortune 500 organizations.
• U.S.-based applicants are especially welcome for easier collaboration with global teams (helpful but not strictly required).
• Prior exposure to AI projects is a plus but not required.

How the engagement works

You will work remotely as a contractor on a part-time schedule, collaborating with project leads and reviewers. Tasks will focus on documents used for AI training, including producing original marketing content and evaluating model-generated text. Communication across Portuguese and English and regular file-based deliverables are expected.

• Typical tasks combine document creation, editing, and evaluation/rating of text outputs.
• Work is performed remotely and coordinated with a project team; strong written communication is essential.
• Apply with your resume and a portfolio showcasing marketing documents, presentations, and spreadsheets.