Top Tech Jobs & Startup Jobs in San Francisco Bay Area, CA

Welocalize invites freelance linguists and localization specialists to submit CVs for opportunities in translation, localization, adaptation, and NLP training-data tasks (collection, annotation, evaluation). Candidates may be contacted when a fit is found.

Perform annotation, labeling, and quality review of text, image, video, and multimodal data to create high‑quality datasets for generative AI. Evaluate prompts/responses, identify edge cases, refine guidelines, support data workflows, and collaborate to improve annotation quality.

Perform second-pass linguistic quality reviews of Spanish (US) customer service machine-translated content, validate severity calibrations, identify recurring MT errors (tone, terminology), and provide clear qualitative feedback for quality reporting and continuous improvement.

Freelance SEO specialist responsible for keyword research and translation (EN↔SK), on-page and metadata optimisation, content and SEO copywriting, data handling, and using analytics and third-party SEO tools to improve search performance.

Evaluate generative AI safety by creating and testing prompts, documenting failures, reviewing multimodal outputs, and applying safety taxonomies and guidelines during high-volume production sprints. Participate in calibration, quality reviews, and flag unclear guidelines or recurring model behaviors.

Evaluate search results for relevance and usefulness, answer simple true/false content quality questions, follow client guidelines, complete online rating tasks, and pass training and exams to support AI search improvements.

Interact with generative AI models to create and evaluate prompts, identify safety failures, document model breakability and failure points, review multimodal content, apply safety taxonomies, perform high-volume annotation sprints, participate in calibration and quality reviews, and flag unclear guidelines or tooling issues.

Write and edit short-form entertainment copy about TV and film in a defined brand voice: rewrite AI-generated lines, research factual details, match tone to genre, and flag incorrect or off-voice AI outputs. Work remotely on a flexible ~20 hour/week freelance contract at $40/hr.

Translate and proofread patent-related content from French into English, preserving original meaning and appropriate style across chemistry, biology, electrical, computer science, and mechanics. Use XTM and follow project processes (MTPE, QC, LQA). Communicate promptly in English and meet weekly volume targets (2,000–5,000 words).