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OpenTrain AIFor AI Companies

Remote AI training and data labeling jobs in Vietnam

Looking for AI-training work while located in Vietnam? OpenTrain is the hiring organization, candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. AI-training work supports machine-learning systems and can include tasks such as labeling images or video, transcribing or reviewing audio, rating model outputs, translating or checking translations, evaluating search results, or using subject-matter knowledge to judge content, inspect each live posting for the exact duties and requirements.

  • 100% remote
  • Flexible hours
  • Hourly / per-task pay
  • 66 open roles

Civil Engineering AI Evaluation Specialist

Join OpenTrain to evaluate and improve AI-generated civil engineering outputs, providing technical feedback on calculations, assumptions, safety, and professional judgment. Remote contractor role, 20+ hours/week, paid $45–$100/hr; English fluency and 4+ years civil engineering experience required.

Generative AI & RLHF
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Expert level
Hourly · $45–$100/hr

Posted Jul 8, 2026

Chemistry AI Training Reviewer

OpenTrain AI seeks an expert Chemistry AI Training Reviewer to evaluate and improve AI-generated chemistry answers; MS/PhD required. Remote, contract role at $70/hr for 20+ hours/week in listed countries.

Generative AI & RLHF
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Expert level
Hourly · $70/hr

Posted Jul 8, 2026

Chemical Engineer AI Evaluation Specialist

Review and refine AI-generated chemical engineering content—assess technical accuracy, safety, assumptions, and calculations. Remote contract, flexible schedule with expected 20+ hours/week and competitive hourly pay ($40–$100/hr).

Generative AI & RLHF
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Intermediate level
Hourly · $40–$100/hr

Posted Jul 8, 2026

C++ AI Code Review Engineer

OpenTrain is hiring an expert C++ engineer to review AI-generated C++ code, produce reference implementations, and write clear step-by-step technical explanations. Contractor role: $65/hour, 20+ hours/week, remote in the countries listed below.

Coding & Software
Computer Code Programming
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Expert level
Hourly · $65/hr

Posted Jul 8, 2026

C# AI Training Engineer

Join OpenTrain as a remote C# AI Training Engineer to review and improve AI-generated C#/.NET code and explanations. This contractor role pays $65/hour, requires strong C#/.NET expertise and clear English writing, and asks for 20+ hours/week.

Generative AI & RLHF
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Intermediate level
Hourly · $65/hr

Posted Jul 8, 2026

Accounting SME for AI Training and Model Evaluation

Join OpenTrain as a remote Accounting SME to review AI-generated accounting outputs, write gold-standard solutions, and rate model responses; hourly pay USD 35–65/hr, 20+ hours/week, hiring across multiple countries.

Legal & Finance
Text
Remote · Austria, Bangladesh, Belgium +35 more
English
Part-time · Flexible
Entry level
Hourly · $35–$65/hr

Posted Jul 8, 2026

Legal AI Response Reviewer (Remote, Contract)

Use your JD and 5+ years of legal practice to evaluate and craft AI-generated legal answers, memos, and policies for OpenTrain AI. Remote contractor work, 20+ hours/week, hourly pay USD $40–$120.

Legal & Finance
Text
Remote · Austria, Bangladesh, Belgium +35 more
English
Part-time · Flexible
Entry level
Hourly · $40–$120/hr

Posted Jul 8, 2026

Astronomy & Space Science AI Evaluator

Review AI-generated astronomy and space-science responses for scientific accuracy, assumptions, units, and uncertainty; remote contract, 20+ hrs/week, with pay from $40–$100/hr depending on location and qualification.

Generative AI & RLHF
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Intermediate level
Hourly · $40–$100/hr

Posted Jul 8, 2026

C Code Review Engineer (Systems-Level C Expert)

Review AI-generated C code and low-level systems designs for correctness, safety, and performance, and produce reference implementations and clear technical explanations. Remote contractor role — part-time, 20+ hours/week at $65/hr; English required.

Coding & Software
Computer Code Programming
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Intermediate level
Hourly · $65/hr

Posted Jul 8, 2026

Biomedical Engineer AI Evaluator

Join OpenTrain AI to evaluate and refine AI-generated biomedical engineering answers — contract, part-time work at 20+ hrs/week with pay from $40–$100/hr. Use your 4+ years of device/biomechanics or clinical engineering experience to improve AI safety, accuracy, and technical reasoning.

Medical & Health
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Intermediate level
Hourly · $40–$100/hr

Posted Jul 8, 2026

Biology AI Evaluation Specialist (Remote Contract)

Evaluate and improve AI-generated biological answers as a remote contract specialist — MS/PhD in biology required. Ongoing part-time work (~20 hrs/week) at $70/hr (USD); English C1+ and applicants from specified countries are welcome.

Generative AI & RLHF
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Entry level
Hourly · $70/hr

Posted Jul 8, 2026

Android Code Review & AI Training Engineer

Join OpenTrain AI as a remote contractor to review AI-generated Android code, produce reference implementations, and craft prompts that improve Android-focused model outputs. $110/hr, 20+ hours/week; ideal for experienced Kotlin Android engineers who enjoy technical evaluation and clear written reas

Generative AI & RLHF
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Intermediate level
Hourly · $110/hr

Posted Jul 8, 2026

Advertising AI Training Expert (Remote Contractor)

Join OpenTrain AI to evaluate and improve AI-generated advertising copy and campaign assets. This remote contractor role pays $35–$70/hr, requires 20+ hours/week, and asks experienced advertisers to produce gold-standard examples and precise feedback that teach models better ad strategy and executio

Generative AI & RLHF
Text
Remote · Bangladesh, Bhutan, Brazil +14 more
English
Part-time · Flexible
Expert level
Hourly · $35–$70/hr

Posted Jul 8, 2026

Chemistry Expert Reviewer for AI Training

OpenTrain seeks a remote Chemistry Expert Reviewer to design, review, and refine chemistry content and problems for AI training; PhD or ABD with teaching and research experience required. Part-time contractor role, 20+ hrs/week, $70–$90/hr.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $70–$90/hr

Posted Jul 7, 2026

Computational Biology AI Evaluation Expert

Use your computational biology expertise to evaluate and annotate AI-generated outputs across genomics, structural biology, and systems biology. Remote contractor role, 20+ hrs/week, $40–$60/hr — help shape safer, more accurate scientific AI.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Expert level
Hourly · $40–$60/hr

Posted Jul 7, 2026

Computational Chemistry Expert for AI Benchmarking

Apply your computational chemistry expertise to review simulations, electronic-structure methods, and cheminformatics pipelines used to train and validate chemistry-focused AI systems. Remote contract role, 20+ hrs/week, $40–$60/hr.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Expert level
Hourly · $40–$60/hr

Posted Jul 7, 2026

Video Annotator, Vision-Language Action (VLA)

Join a long-term, remote video-annotation contract to help train vision-language action models by classifying activities and marking objects in everyday household videos using Encord. Fixed-price contract ($58,000 USD) with up to 180 hours/month per annotator and ongoing work for top performers.

Image & Video Annotation
Video
Remote · Worldwide
English
Part-time · Flexible
Intermediate level
Fixed price · $58000

Posted Jul 7, 2026

AI Quality & Testing Software Engineer

Join OpenTrain AI as a part-time, remote Software Engineer focused on QA and testing for AI-powered video generation products — 20+ hrs/week at $30–$42/hr. Bring TypeScript experience, a portfolio of self-built projects, and QA/test automation skills to help improve real AI products.

Coding & Software
Video
Remote · Worldwide
English
Part-time · Flexible
Expert level
Hourly · $30–$42/hr

Posted Jul 6, 2026

Engineering Document Review Expert

Join OpenTrain as an Engineering Document Review Expert to evaluate technical reports, design documents, and project analyses for AI training — remote contractor role, 20+ hours/week, paid $20–$40 USD/hour. Ideal for engineers with technical-reporting experience.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Chemistry Document Review Specialist

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.

Writing & Editing
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Physics Content Review Specialist

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.

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$50/hr

Posted Jul 3, 2026

Mathematics Expert, Advanced Problem Solving & Evaluation

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Legal Document AI Training Expert (Remote Contract)

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.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Computer Science AI Training Specialist

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

Generative AI & RLHF
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Financial Document Review Specialist

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.

Legal & Finance
Document
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Physics Professor / Researcher, AI Content Reviewer

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $70–$90/hr

Posted Jul 3, 2026

Biology Document Review Specialist

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $20–$40/hr

Posted Jul 3, 2026

Tongan Audio Transcription & Linguistic Analysis Expert

Join OpenTrain AI to transcribe and analyze Tongan audio, help train language models, and shape AI with cultural expertise; remote, contract role paying $45–$95/hr with a typical 20+ hour weekly commitment. Native or near-native Tongan and English fluency required.

Audio & Speech
Audio
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $45–$95/hr

Posted Jul 3, 2026

Financial Crime & AML Compliance Expert (Remote Contract)

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jul 3, 2026

Red Team Lead, Offensive Cybersecurity for AI Evaluation

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.

Generative AI & RLHF
Text
Remote · Worldwide
English
Part-time · Flexible
Entry level
Hourly · $50–$90/hr

Posted Jul 3, 2026

What this work can involve

Work open to applicants located in Vietnam can involve a range of human-in-the-loop activities used to teach, test, and refine AI. Examples include annotating visual data, transcribing or reviewing audio, writing or rating model responses, evaluating search results, translating text, and applying domain knowledge to assess outputs. Each live posting describes the specific task type, any language requirements, and the detailed instructions for that role.

  • Examples of task types include image or video annotation, audio transcription and review, model-response rating, and translation checks.
  • Some roles require knowledge of particular subject areas or languages; those requirements are listed on the posting.
  • Check each live posting for the exact task description, eligibility rules, and any language or content needs.

How hiring works through OpenTrain

OpenTrain is the hiring organization for roles that accept applicants located in Vietnam; candidates apply through OpenTrain, and OpenTrain may place or refer successful candidates to the client whose project they will support. The individual live posting is the only source of truth for eligibility, responsibilities, qualifications, hours, pay, and any client-specific rules.

  • Candidates apply through OpenTrain.
  • OpenTrain may place or refer successful candidates to the client for the project they will support.
  • Refer to the live posting for role-specific eligibility and terms.

Frequently asked questions

What can this work involve?
Roles that accept applicants located in Vietnam involve human tasks used to train and evaluate AI systems. Depending on the posting, tasks can include labeling images or video, transcribing or reviewing audio, rating or editing model responses, checking or producing translations, evaluating search results, or applying subject-matter knowledge to judge outputs. Each posting explains the exact responsibilities and any language or content requirements.
Where can I find role-specific details?
The individual live posting is the only source of truth for eligibility, responsibilities, qualifications, experience, pay, hours, schedule, and client-specific requirements. Inspect the posting carefully to confirm whether you meet the listed qualifications and to learn the exact duties and working terms for that role.
How does hiring work through OpenTrain?
Candidates apply through OpenTrain; OpenTrain is the hiring organization and may place or refer successful applicants to the client whose project they will support. For specifics about who can apply and what a role requires, consult the individual live posting for that opportunity.