Skip to content
Updated How AI-exposed are the skills employers are hiring for? See the data →

From the employer's careers site First seen 5 Nov 2026

Project Perseus | Data Labeling Associate - Portuguese (Brazil) Speakers (Human-in-the-Loop AI)

Welo Data California On-site full-time

Salary

USD 34-34 per-hour-wage

Apply on Welo Data

Description

Welo Data is seeking detail-oriented individuals to join their team as Data Labeling Associates, working directly with cutting-edge AI systems to evaluate outputs, identify gaps, and improve system behavior in real-world scenarios. The role involves critical thinking, data quality evaluation, and collaboration with teams.

Project Details

  • Job Title: Data Labeling Associate
  • Location: Onsite (Bay Area, Seattle, NYC, or client-dependent)
  • Hours: Full-time, 40 hours per week
  • Employment Type: W2 Full-Time Employee
  • Work Authorization: Must be authorized to work in the U.S. (no visa sponsorship)
  • Pay Rate: $34/hour

Responsibilities

  • Evaluate AI model outputs and provide structured, high-quality feedback.
  • Perform audit-based reviews of data and model behavior, identifying patterns, edge cases, and failure modes.
  • Apply guidelines thoughtfully and flag when they don’t reflect real-world scenarios.
  • Contribute to improving evaluation frameworks.
  • Identify trends in model performance and communicate insights clearly.
  • Participate in team discussions, calibrations, and stakeholder syncs.
  • Partner with leads and cross-functional teams to refine quality standards.
  • Document findings in a clear, concise, and actionable way.

Requirements

  • Native-level Portuguese (Brazil) proficiency and a university degree (Bachelor’s or higher).
  • B2 or superior level of English.
  • 1–2 years of professional writing experience with strong, structured writing skills.
  • Ability to apply complex writing rules and guidelines consistently.
  • Strong understanding of safety considerations in GenAI data delivery, with 2+ years of relevant experience.
  • Strong critical thinking and attention to detail.
  • Ability to make sound judgment calls in ambiguous situations.
  • Naturally curious about AI, technology, and how systems behave.
  • Comfortable speaking up, asking questions, and contributing ideas.
  • Strong written and verbal communication skills.
  • Ability to stay consistent while working with evolving guidelines.
  • Experience in data quality, QA, annotation, or analysis is helpful but not required.

Benefits

  • Paid Vacation: 6 days
  • Paid Company Holidays: 2 days (Memorial Day and Labor Day)
  • Paid Sick Leave: accrued per applicable state law and company policy
  • Medical, Dental, and Vision Insurance (eligibility applies)
  • Health Savings Account (HSA)
  • 401(k) Retirement Plan
  • Employee Assistance Program
  • Additional voluntary benefits (life, accident, critical illness, etc.)
  • Free Gourmet Food: Free breakfast, lunch, and dinner are provided, featuring a wide variety of cuisines in multiple cafes.
  • Micro-kitchens & Snacks: Offices are stocked with free snacks and beverages, including premium coffee and La Croix.
  • Unique Campus Features: Some locations include roof-top nature parks.
  • Commuter Benefits: Free transport, shuttles, and sometimes bike-to-work perks.

Skills

Required

Nice to have

Ready to apply?

You apply with the employer directly. Their original posting is here: https://jobs.lever.co/weloglobal/32423991-2b3f-4499-8905-ada86936e4f7

Apply on Welo Data