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Remote AI training and data labeling jobs in Bulgaria

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.

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

Flemish Native Speakers, Audio Annotation (Contract)

Join OpenTrain AI as a part-time contractor to transcribe and label audio; native Flemish required, training provided, 20+ hrs/week commitment, $300 fixed payment per project. Work remotely using internal tooling and basic Google Sheets.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $300

Posted Jan 8, 2025

Bashkir Audio Transcriber & Annotator, Remote, Part-Time

Join OpenTrain to transcribe and label Bashkir audio using our internal tools; training is provided and no prior experience is required. This contractor role asks for 20+ hrs/week (about 3–5 hours daily) and pays a fixed $300 for the assignment.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $300

Posted Jan 8, 2025

Kabyle Audio Transcription & Annotation (Remote, Part-Time)

Join OpenTrain AI as a remote contractor to transcribe and label Kabyle audio using our internal tools; entry-level candidates receive full training. This contract pays a fixed USD 270 and expects 20+ hours/week (roughly 3–5 hours/day).

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $270

Posted Jan 7, 2025

Haitian Creole Audio Annotator

Join OpenTrain to annotate Haitian Creole audio: transcribe, label speech segments, and apply quality-focused guidelines. Part-time contractor work (20+ hrs/week, ~3–5 hrs/day) with training provided and a fixed price of $270 for the project.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $270

Posted Jan 7, 2025

Sindhi Audio Transcriber & Speech Labeler

Native Sindhi speakers wanted to transcribe and label audio remotely — training provided and no prior experience required. Part-time contract work (20+ hrs/week; 3–5 hrs/day typical) with a fixed payment of $200 USD using OpenTrain's annotation tools.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $200

Posted Jan 7, 2025

Native Gujarati Audio Annotator, Remote Part-Time

OpenTrain AI is hiring native Gujarati speakers for a remote audio annotation project (classification and segmentation). Entry-level, training provided; contractors work 20+ hours/week on a part-time schedule for a fixed $100 project payment.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $100

Posted Jan 7, 2025

Native Tamil Audio Annotator (Remote, Part-Time)

OpenTrain AI seeks native Tamil speakers to annotate audio: segment speech, classify clips, and transcribe recordings. Entry-level, contractor role with a fixed-price payment of $100; expect to work 3–5 hours daily using OpenTrain AI’s annotation tools and provided guidelines.

Audio & Speech
Audio
Remote · Worldwide
Flexible hours
Entry level
Fixed price · $100

Posted Jan 6, 2025

Gujarati Data Annotation Specialist

Join OpenTrain AI to transcribe and segment Gujarati audio using internal tools — training provided and no prior experience required. This contractor role pays a fixed USD 115, requires native Gujarati and basic Google Sheets skills, and asks for 3–5 hours of daily availability.

Audio & Speech
Audio
Remote · Worldwide
Flexible hours
Entry level
Fixed price · $115

Posted Jan 4, 2025

Operating Systems Subject Matter Expert (India, C1 English)

Join OpenTrain to create and refine high-quality AI training data about operating systems — remote work for India-based experts with strong OS, scripting, and documentation skills. $25/hr, part-time contract, <20 hrs/week.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Jan 2, 2025

System Administrator SME for AI Training (India, C1 English)

Use your 7+ years of system administration experience to write, review, and explain real-world sysadmin tasks for AI training datasets. Contractor, part-time role paying $25/hr; India-based applicants with C1 English will be considered.

Generative AI & RLHF
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Jan 2, 2025

Senior Excel Specialist (India, C1 English)

Join OpenTrain as a Senior Excel SME in India to create and evaluate Excel-focused AI training data — $23/hr, contractor, 20+ hours/week. You'll design advanced Excel prompts, review and rank model outputs, and complete a coding test plus a live interview for selection.

Generative AI & RLHF
Text
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $23/hr

Posted Jan 2, 2025

Slurm Workload Manager SME (India, C1 English)

Join OpenTrain as a Slurm Workload Manager SME based in India to create scripting prompts, evaluate AI outputs, and refine models for HPC workloads. Part-time contractor role paying $27/hr (under 20 hrs/week); applicants must have 7+ years Slurm experience and C1 English.

Generative AI & RLHF
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $27/hr

Posted Dec 30, 2024

Senior Salesforce Developer SME (India, C1 English)

OpenTrain AI seeks a Senior Salesforce Developer SME in India (C1 English) to write coding prompts, evaluate AI responses, and refine model outputs—part-time contractor work at $24/hr (<20 hrs/week). Candidates must pass a live coding test and interview; dishonesty leads to permanent platform ban.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $24/hr

Posted Dec 30, 2024

Call Recording Sentiment Rater (Audio Classification)

Listen to 2–5 minute customer call recordings and label the caller's sentiment as overly-negative, negative, neutral, positive, or overly-positive. Entry-level, fully remote contractor work; fixed price USD 100, under 20 hours/week, open worldwide.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $100

Posted Dec 27, 2024

GDScript Subject Matter Expert (India, C1 English)

Join OpenTrain as a GDScript SME based in India to review, debug, and correct AI-generated Godot code; $20/hr, part-time contractor for ~20+ hours/week. Requires 7+ years professional GDScript experience, strong Godot knowledge, and a live coding test and interview.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $20/hr

Posted Dec 26, 2024

Perl SME, Code Review & Debugging (India, C1 English)

Join OpenTrain AI as a Perl Subject Matter Expert based in India to review, debug, and correct AI-generated Perl code and clearly document fixes. Part-time contractor role (<20 hrs/week) at $20/hr requiring C1 English and 7+ years of professional Perl experience.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $20/hr

Posted Dec 26, 2024

Julia Programming Language SME (India, C1 English)

OpenTrain AI seeks a Julia subject-matter expert based in India to review, debug, and correct AI-generated Julia code, document fixes, and explain improvements; contractor, part-time at $27/hr. Candidates must have 7+ years of professional Julia experience and C1 English.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $27/hr

Posted Dec 26, 2024

Lua SME, Review and Correct AI-Generated Code

OpenTrain AI is hiring an India-based Lua Subject Matter Expert (C1 English) to review, debug, and correct AI-generated Lua code, document fixes, and improve training data. Contract, part-time role at $24/hr with a ~20+ hrs/week commitment and a required coding test plus live interview.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $24/hr

Posted Dec 26, 2024

Rust SME for AI Code Review (India, C1 English)

OpenTrain AI seeks a Rust Subject Matter Expert based in India to review, debug, and correct AI-generated Rust code; $26/hr, contractor, part-time. Candidates must have 7+ years Rust experience, C1 English, and pass a live coding test and interview.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $26/hr

Posted Dec 26, 2024

Dart Programming SME - Code Annotation (India)

Experienced Dart developer (7+ years) based in India with C1 English sought for part-time contract work annotating and evaluating Dart code and technical content at $25/hr; candidates must pass a live coding test and interview.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Dec 26, 2024

SME Software Labeler, 40+ CS Specializations (US)

Join OpenTrain as a US-based Subject Matter Expert to label and evaluate technical programming content across 40+ computer science specializations; $40/hr, part-time contractor work requiring native English and 5+ years' experience. Apply for exactly one category and complete a live coding test.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $40/hr

Posted Dec 21, 2024

Software & Development Subject Matter Expert (India)

Join OpenTrain as a remote, part-time Subject Matter Expert in one of 43 software and computer-science specialties—India-based applicants with C1/C2 English and 5+ years' experience only. Earn $25/hour, work 20+ hours/week, and complete a coding test plus live interview.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Intermediate level
Hourly · $25/hr

Posted Dec 21, 2024

Music Fit Evaluation, Music Professionals (B1/B2 English)

Join OpenTrain AI to evaluate and rate music audio for training industry-grade production and mastering tools; part-time, remote work at $25/hr. Perfect for music producers, audio engineers, and sound designers with B1/B2 English and music-specific experience.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $25/hr

Posted Dec 19, 2024

Music Fit Rater (B1/B2 English), Spain

Rate which of two music tracks best matches long English song lyrics and explain your choice; remote work for Spain residents at $10–$11/hr, ideal for music fans with B1/B2 English and familiarity with multiple genres.

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $10.5/hr

Posted Dec 14, 2024

Music Fit Rater - B1/B2 English (Philippines)

Annotate English song lyrics by choosing which of two music tracks best fits and explain your reasoning; entry-level, remote contract for candidates in the Philippines. Work 20+ hours/week at a maximum rate of $3.15 per hour — strong B1/B2 English required.

General Annotation
Text
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $3.15/hr

Posted Dec 14, 2024

OBGYN Physician, AI Medical Content Reviewer

Experienced OBGYN physicians are needed to review and refine obstetrics and gynecology content for an AI chatbot. Remote contractor role paying $100/hr with a 20+ hour/week expectation and priority for candidates with greater availability.

Medical & Health
Text
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $100/hr

Posted Dec 12, 2024

Short Audio Recording Project, Italian, Android

Earn $51 for a short (~2 hour) remote audio recording task: native Italian speakers in Italy with an Android 9+ phone will read and record ~500 short voice commands using an Android app; consent and English instructions required — complete within 1 week (by Dec 10).

Audio & Speech
Audio
Remote · Worldwide
Part-time · Flexible
Entry level
Fixed price · $51

Posted Dec 6, 2024

Attorney Annotators for Legal LLM Evaluation

OpenTrain AI seeks licensed attorneys to ask legal questions of an internal legal LLM and A/B label its text responses. Part-time contractor work (under 20 hrs/week), paid per label ($2.125) with no weekly cap—current contributors average $2,000/week.

Legal & Finance
Text
Remote · Worldwide
Part-time · Flexible
Entry level
Per task · $2.125/label

Posted Dec 3, 2024

Full-Stack Engineer, Code QA (Python or JavaScript)

Join OpenTrain AI as a remote Full-Stack Software Engineer conducting QA reviews of coding tasks and unit tests; work 20+ hours/week at $30/hr using your 5+ years of Python or JavaScript experience to ensure correctness and improve QA rubrics.

Coding & Software
Computer Code Programming
Remote · Worldwide
Part-time · Flexible
Entry level
Hourly · $30/hr

Posted Nov 24, 2024

RLHF Python Code Review and Correction

Join OpenTrain AI as a contractor to review, correct, and optimize auto-generated Python code for RLHF training; entry-level contributors with Python familiarity welcome and paid $50/hour. Work remotely and help shape higher-quality code suggestions from LLMs.

Generative AI & RLHF
Computer Code Programming
Remote · Worldwide
Flexible hours
Entry level
Hourly · $50/hr

Posted Nov 12, 2024

What this work can involve

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.

  • Possible work may include labeling visual data, reviewing written responses, or evaluating search results.
  • Individual postings may define language, translation, audio, coding, or subject-matter tasks.

How hiring works through OpenTrain

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.

  • Review each posting for its rules about applicants located in Bulgaria.
  • Use the individual live posting for every role-specific detail.

Frequently asked questions

What can this work involve?
AI training work involves preparing or reviewing examples used by artificial-intelligence systems. Depending on the individual posting, it can include data labeling, image or video annotation, audio transcription or recording, writing or rating responses, search-result evaluation, translation, code review, or applying subject-matter knowledge. Each role defines its own responsibilities.
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, location rules, and client-specific requirements. Review the posting for the role’s details and any conditions applying to applicants located in Bulgaria.
How does hiring work through OpenTrain?
OpenTrain is the hiring organization for roles on OpenTrain, and candidates apply through OpenTrain. OpenTrain may place or refer successful candidates to the client whose project they will support. Review the individual live posting for all other information about the role.