Looking for remote AI training or data labeling work open to applicants located in Bulgaria? This work can support AI systems through tasks such as reviewing examples, labeling data, or evaluating model responses. OpenTrain is the hiring organization for roles on OpenTrain. Candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support.
Join OpenTrain to review and validate technical chemistry documents for AI training—edit experimental write-ups, fact-check equations and datasets, and produce clear explanations. Remote contractor role, 20+ hrs/week, pay $20–$40 USD/hr, English required.
Posted Jul 3, 2026
Join OpenTrain AI as a remote Physics Content Review Specialist to evaluate and refine physics documents used to train AI models; this contractor role requires 20+ hours/week and pays $20–$50/hr. Bring your physics background to improve model reasoning and scientific accuracy.
Posted Jul 3, 2026
Join OpenTrain as a Mathematics Expert to write and evaluate advanced math solutions and proofs that train and benchmark AI systems. Flexible contract work (20+ hrs/week), remote worldwide, $20–$40/hr.
Posted Jul 3, 2026
Share original, professionally authored legal documents to help train responsible AI agents — remote contractor work, 20+ hours/week, paid $20–$40/hr. Ideal for practicing lawyers, legal researchers, or compliance consultants with strong drafting and legal-analysis experience.
Posted Jul 3, 2026
Join OpenTrain as a remote, part-time Computer Science AI Training Specialist to author and evaluate technical examples that teach AI systems; contractor work at $20–$40/hr for 20+ hours/week. Ideal for CS graduates with strong writing and domain expertise in algorithms, systems, databases, networki
Posted Jul 3, 2026
Apply your financial analysis expertise to review reports and write structured feedback that trains AI systems. Remote, part-time contractor work (20+ hrs/week) paying $20–$40/hr with estimated project earnings of $3,200–$6,400.
Posted Jul 3, 2026
Join OpenTrain to develop and review physics problems, solutions, and explanations used to train and evaluate AI; remote contractor role for PhD-level candidates at $70–$90/hr, 20+ hours/week. Work is asynchronous and text-focused.
Posted Jul 3, 2026
Join OpenTrain to review and annotate biological datasets and documents, author and edit lab reports, and craft prompts that teach AI biological concepts. Part-time contractor role (20+ hrs/week), paid $20–$40/hr, fully remote and open worldwide.
Posted Jul 3, 2026
Join OpenTrain to design AML, fraud and scam scenarios and shape detection frameworks for AI systems in a remote contract role (20+ hrs/week) paying $50–$90/hr. Use hands-on financial-crime experience to write scenario libraries, escalation criteria, and practical guidance.
Posted Jul 3, 2026
Lead red-team evaluation for AI security: design offensive-evaluation frameworks, safe proxy tasks, and scoring rubrics. Remote contractor role, 20+ hrs/week, $50–$90/hr; requires 5+ years in offensive security, red teaming, or vulnerability research.
Posted Jul 3, 2026
Submit original medical documents you authored to help train AI — remote contractor role paying $20–$40/hr for 20+ hours/week. Worldwide, English-language submissions only; strong de-identification and medical judgment required.
Posted Jul 3, 2026
Annotate short first-person household task videos to train AI: classify clips, track objects across frames, and write clear quality judgments. Remote contractor role, $20/hr, 20+ hrs/week, start within ~24 hours with estimated project earnings of $3,200.
Posted Jul 3, 2026
Join OpenTrain as a Senior Full Stack Engineer building web systems that power AI-training workflows. Remote contractor role, 20+ hrs/week, pay $30–$90/hr; 3+ years full‑stack experience required.
Posted Jul 3, 2026
Work remotely as a Software Engineer on Human Data Platforms building document workflows and pipelines for AI training; part-time contractor role at $50–$70/hr (20+ hrs/week) requiring Python, React, cloud, and document-processing experience.
Posted Jul 3, 2026
Capture first-person motion video for AI training using a smartphone and head strap. This remote, part-time contractor role pays $13–$15 per hour and requires at least 10 approved hours of video data each week.
Posted Jul 3, 2026
Join OpenTrain AI as a contract Cocos2d-x developer building and refining 2D gameplay systems that support AI training and data-generation projects. Remote, part-time (20+ hrs/week), pay up to $120/hr; entry-level candidates with hands-on Cocos2d-x experience encouraged to apply.
Posted Jul 3, 2026
Join OpenTrain AI as a part-time, remote Medical / Healthcare AI Trainer reviewing clinical documentation and care workflows; $15–25/hr, 20+ hours/week. No prior AI experience required—bring healthcare knowledge, attention to detail, and clear writing.
Posted Jul 1, 2026
Join OpenTrain AI as a remote voice actor to record and review audio for Voice Performance Training—contractor, flexible schedule, $20–$50/hr with typical commitment 20+ hrs/week and estimated earnings of $3,200–$8,000.
Posted Jun 30, 2026
Join OpenTrain as a Video AI Training Specialist reviewing and annotating AI-generated and real-world video. Part-time contractor role (20+ hrs/week) paying $65–$80/hr, ideal for experienced video professionals who enjoy precise critique and dataset work.
Posted Jun 30, 2026
Join OpenTrain as a Video Editor AI Training Specialist to review AI-generated animations and VFX, build evaluation rubrics, and curate video datasets; remote, 20+ hrs/week, paid $30–$80/hr (up to $80/hr).
Posted Jun 30, 2026
Join OpenTrain AI to transcribe and linguistically review Uzbek video content: timestamp dialogue, annotate emotion and tone, and provide grammatical and idiomatic feedback. Part-time contractor role (min 15 hrs/week, under 20), paid $45–$95/hour, remote worldwide.
Posted Jun 30, 2026
Contractor role reviewing Spanish (Spain) audio transcriptions and adding linguistic annotations — 20+ hours/week, paid $10–$20/hour. Join OpenTrain to help improve AI language models with precise, independent annotation work.
Posted Jun 30, 2026
Join OpenTrain AI to transcribe and annotate Romanized Hindi audio and text, correct machine transcripts, and add metadata; remote contract work at $8–$16 USD/hr with a 20+ hour weekly commitment. Ideal for detail-oriented transcribers fluent in Romanized Hindi.
Posted Jun 30, 2026
Join OpenTrain AI to build and optimize Panda3D-based 3D simulations that train machine learning models; contract, remote work at 20+ hrs/week with pay between $50–$120 USD/hour. You'll code in Python and C++, collaborate via GitHub, and document technical designs.
Posted Jun 30, 2026
Seeking a remote Physics PhD to create, review, and evaluate advanced physics problem sets and model outputs for AI training; part-time contract (~20 hrs/week) paying $80–$90/hr for 1–3 months. Work focuses on text tasks: question answering, text generation, and evaluation.
Posted Jun 30, 2026
Apply your PhD engineering expertise to write authoritative responses, design experiments, and analyze results for AI training; remote, part-time contract at $80–$90/hr for 20+ hours/week. English required; worldwide applicants welcome.
Posted Jun 30, 2026
Join OpenTrain as a remote contractor reviewing Node.js, JavaScript, and TypeScript code to create high-quality training data for AI systems; part-time (≈20 hrs/week) for 1–3 months, paid $30–$90/hr. Bring strong backend experience and clear technical communication.
Posted Jun 30, 2026
Join OpenTrain to transcribe and annotate Myanmar–English video data with precise timestamps, cultural insight, and linguistic analysis. Flexible part-time contractor work (20+ hrs/week) paying $45–$95/hr for high-quality bilingual reviewers.
Posted Jun 30, 2026
Join OpenTrain to apply your military operations, targeting, and international humanitarian law expertise to evaluate AI model outputs and design policy-relevant evaluation tools; remote contract work, 20+ hrs/week, $50–$90/hour. Help shape responsible AI behavior in defense and humanitarian context
Posted Jun 30, 2026
Join OpenTrain to help design taxonomies, rubrics, and benchmarks for detecting self-harm, eating disorders, and suicide risk in AI systems; remote, contractor role (20+ hrs/week) paying USD $50–$90/hr, English required.
Posted Jun 30, 2026
AI training is human work used to prepare and review examples for artificial-intelligence systems. Depending on the individual role, work open to applicants in Bulgaria can include annotating images or video, transcribing or recording audio, writing or rating model responses, evaluating search results, translating text, reviewing code, or applying subject-matter knowledge. Read each live posting for its exact responsibilities and requirements.
OpenTrain is the hiring organization for these roles, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. The individual live posting is the source of truth for eligibility, responsibilities, qualifications, experience, pay, hours, schedule, location rules, and client-specific requirements.
