Siraphat Saimat
AI Language & Voice AI Specialist (LLM / Automation)
Bangkok
Summary
AI language specialist with experience in AI training, linguistic QA, and voice AI testing. Skilled in evaluating prompts, annotating language data, and improving conversational AI systems for multilingual environments.
Overview
13
13
years of professional experience
1
1
Certification
Work History
Voice Test Engineer
FPT Software (Freelance / Contract)
11.2025 - 02.2026
- Test voice AI systems across multiple real-world scenarios
- Evaluate speech recognition (ASR) and text-to-speech (TTS) system performance
- Verify accuracy, response quality, and audio output of voice applications
- Design and execute test cases and report bugs using Jira
- Collaborate with developers to reproduce and resolve voice-related issues
- Analyze voice data and provide feedback to improve AI model performance
AI Translator- Thai
Mindy Support (Freelance)
11.2024 - Current
- Translate and localize AI-generated content between Thai and English
- Review and edit machine translation outputs to improve linguistic accuracy
- Support AI model training by providing high-quality language data
- Ensure translations maintain cultural and contextual relevance
- Collaborate with AI teams to improve multilingual language models
AI Trainer
Outlier (Freelance)
04.2024 - Current
- Annotate and review language data to train conversational AI models
- Evaluate AI responses and provide feedback to improve accuracy and quality
- Perform prompt evaluation and ranking for large language model (LLM) training
- Ensure linguistic accuracy and cultural relevance in Thai language datasets
- Contribute to improving AI performance in multilingual conversational systems
Conversation Partner for AI Training
Thai Babel Audio
04.2023 - Current
- Train the next generation of conversational audio AI models.
- Achievements/Tasks
Linguistic AI Prompt QA
RWS Group (Freelance)
11.2024 - Current
- Evaluate and review AI prompts for linguistic accuracy and clarity
- Ensure AI responses align with user intent and language standards
- Perform quality assurance for Thai language datasets used in LLM training
- Improve prompt quality for conversational AI systems
Train AI, Voice Activity Detection Labelin
Alignerr ( Freelance / Contract)
04.2023 - Current
- Annotate and label speech data for Voice Activity Detection (VAD) systems
- Identify and classify segments of speech and non-speech in audio recordings
- Support AI model training for voice recognition and speech processing
- Ensure accuracy and consistency of labeled audio datasets
- Contribute to improving AI performance in speech detection and voice applications
AI CX Designer
WIZ AI (Freelance / Contract)
09.2024 - 02.2025
- Design and refine chatbot and voicebot conversation flows for AI applications
- Develop Thai-language scripts aligned with brand tone and user experience goals
- Optimize conversational design to improve AI response accuracy and usability
- Collaborate with AI engineers and product teams to enhance conversational AI systems
- Test and evaluate chatbot interactions to improve user satisfaction and system performance
Sales & Customer Service Representative
7-Eleven & Protein Beverage Products
05.2013 - 02.2015
- Customer service, sales support, and issue handling in fast-paced environments
Education
Associate of Science - Computer Technology / Information Technology
Thai-Austrian Technical College
THAILAND 04.2001 -
Certificate - Claude Code AI Developer
Futureskill
Online03-2026
Computer Science Diploma - Foundations: Data, Data, Everywhere
Coursera
Online04-2025
Skills
AI Training & Evaluation
Linguistic AI Prompt QA
Prompt Engineering for LLM
Voice AI Testing (ASR / TTS)
Speech Data Annotation
Conversational AI Design
Chatbot & Voicebot Script Writing
Data Annotation & Labeling
AI Translation (Thai–English)
Bug Tracking (Jira)
Certification
Google Certificate: Foundations, Data (2025 - Present)
Timeline
Voice Test Engineer
FPT Software (Freelance / Contract)
11.2025 - 02.2026
AI Translator- Thai
Mindy Support (Freelance)
11.2024 - Current
Linguistic AI Prompt QA
RWS Group (Freelance)
11.2024 - Current
AI CX Designer
WIZ AI (Freelance / Contract)
09.2024 - 02.2025
AI Trainer
Outlier (Freelance)
04.2024 - Current
Conversation Partner for AI Training
Thai Babel Audio
04.2023 - Current
Train AI, Voice Activity Detection Labelin
Alignerr ( Freelance / Contract)
04.2023 - Current
Sales & Customer Service Representative
7-Eleven & Protein Beverage Products
05.2013 - 02.2015
Associate of Science - Computer Technology / Information Technology
Thai-Austrian Technical College
04.2001 -
Certificate - Claude Code AI Developer
Futureskill
Computer Science Diploma - Foundations: Data, Data, Everywhere
Coursera
Projects Tools & Technologies Certifications
Voice AI Testing & Evaluation Project
- Tested Thai voice recognition systems across multiple real-world scenarios
- Evaluated ASR and TTS performance to improve voice AI accuracy
Conversational AI Script Design
- Designed and optimized chatbot and voicebot conversation flows
- Improved AI response clarity and user interaction experience
AI Language Training & Annotation
- Annotated and reviewed Thai language datasets for conversational AI models
- Contributed to training multilingual large language models (LLMs)
Tools & Technologies
- Conversational AI platforms
- ASR / TTS Voice AI systems
- LLM prompt evaluation tools
- Data annotation platforms
- Jira (bug tracking)
- Basic Python for test automation