Data Annotation Specialist - South Bay, CA (On Site)
About the role
OVERVIEW
Welo Data is looking for a skilled Data Analyst to join our team and contribute to advancing AI technologies. This role offers a unique opportunity to engage directly with cutting-edge AI products, supporting the refinement and performance of machine learning models through precise data analysis and quality assurance.
Project Details
Job Title: Data Analyst
Location: Bay Area, CA (Onsite)
Hours: Full-time, 40 hours per week
Employment Type: W2 Full-Time Employee
Must have valid work authorization in the US (Welocalize does not sponsor VISAs at this time).
This role is an incredible chance to be at the forefront of AI technology, helping shape the future by testing new products, updating machine learning models, and ensuring high-quality data for impactful AI solutions.
Key Responsibilities
- Test new AI products and provide actionable feedback to improve functionality and user experience.
- Conduct detailed data annotation and quality assurance of natural language datasets following established guidelines.
- Collaborate in updating and refining machine learning models to boost accuracy and effectiveness.
- Analyze data for consistency, relevancy, and alignment with project goals.
- Perform quality control to identify and report anomalies, error patterns, and discrepancies.
- Use basic data analysis methods to extract insights and support continuous improvement.
- Prepare clear and concise reports on findings, including observations on data quality, AI model performance, and user feedback.
Preferred Qualifications
- University degree in linguistics, translation, or a related field.
- 3-5 years of professional linguistics experience.
- Strong analytical skills with the ability to detect patterns and anomalies.
- Excellent communication skills and the ability to work collaboratively in a fast-paced environment.
- Adaptability to evolving priorities and project requirements.
Benefits
- Paid Sick Time & Paid Holiday (combined): 15 days
- Paid Holidays: Memorial Day and Labor Day
- Medical Insurance (subject to eligibility requirements)
- Dental Insurance
- Vision Insurance
- Health Savings Account (HSA)
- Voluntary Life Insurance
- Accident, Critical Illness, and Hospital Indemnity Insurance
- Telemedicine Benefit
- 401(k) Retirement Plan
- Employee Assistance Program
Please note that in order to verify work authorization as is required by Federal law (I-9 process), all new employees must complete a live video verification with their selected IDs and provide photos of these selected IDs within their first 3 days of employment.
To know more details (Click here)
In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification form upon hire. In addition, we employ anti-fraud checks to ensure all candidates meet the requirements of the program.
As a trusted global transformation partner, Welocalize accelerates the global business journey by enabling brands and companies to reach, engage, and grow international audiences. Welocalize delivers multilingual content transformation services in translation, localization, and adaptation for over 250 languages with a growing network of over 400,000 in-country linguistic resources. Driving innovation in language services, Welocalize delivers high-quality training data transformation solutions for NLP-enabled machine learning by blending technology and human intelligence to collect, annotate, and evaluate all content types. Our team works across locations in North America, Europe, and Asia serving our global clients in the markets that matter to them. www.welocalize.com
To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.
From Welo Data's job posting, checked Oct 18, 2026.
The application
Your details and CV, then 20 questions (5 written).
- 1.Which location are you applying for?Pick one
- 2.Do you have data annotation experience with text? If so, please share your experience:Written answer
- 3.Do you have experience on LLM data creation or evaluation of prompts or responses from text, video, and/or image data? If so, please share your experience:Written answer
- 4.Have you applied NLP and linguistic knowledge to ensure accuracy in processed data? Share examples.Written answer
- 5.How many years of experience do you have working with AI data?Pick one: 0 · 1 · 2 · 3 · 4 · 5+
- 6.Technology Savvy. Please check all that apply to your experience and skills:Pick any: MS Excel · MS Word · MS Power Point · File-sharing environment
- 7.Do you have education in one of the following areas:Pick any: Linguistic · Translation · Journalism · Computer Science · I do not have education in any of these areas
- 8.How many years of experience do you have working in a linguistic field?Pick one: 0 · 1 · 2 · 3 · 4 · 5+
- 9.How many hours will you be able to perform tasks weekly?Pick one (11 options)
- 10.This position is 100% on-site with no possibility for remote work. Are you available to work on-site and able to commute to one of our offices in South Bay, CA (We will confirm the exact location during the process)?Yes or no
- 11.This is a full-time position, 40 hours per week. Can you work that amount of hours?Yes or no
- 12.Are you legally authorized to work in the United States?Yes or no
- 13.Will you now or in the future require sponsorship for employment visa status (e.g., H-1B, O-1, etc.)?"Yes or no
- 14.Do you have experience in the writing field? (Copywriting, creative writing, technical writing, etc)Yes or no · optional
- 15.In what country do you currently live?Pick one (195 options)
- 16.How many years have you lived in your current country? (Please choose one)Pick any (10 options)
- 17.Which U.S. State are you currently based in?Pick one (52 options)
- 18.Do you have a degree in Linguistics?Yes or no
- 19.If so, in which field?Written answer
- 20.How many years of experience you have in the linguistic field?Written answer
From Welo Data's apply page, checked Oct 9, 2026.
About Welo Data
Welocalize's AI-data community: annotation, evaluation, red-teaming, and multilingual work.
How it pays: Tasks go on purchase orders, by default one a week, that you invoice in Workday; Welo Data invoices are paid 14 days after receipt, into Hyperwallet. US raters are part-time W-2 employees (Welocalize talent help center, Payment Terms).
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