Rena Bracha
@renabracha
I am a Japanese language specialist and AI trainer focused on LLM evaluation and prompt engineering.
IsraelWhat I'm looking for
I am a Japanese-native, bilingual language specialist and AI trainer with a B.Sc. in Computer Science, dedicated to improving conversational AI through linguistics-informed evaluation and prompt engineering.
I specialize in multi-turn conversational testing, generating reproducible error traces, and delivering clear, actionable feedback and rewrites that integrate into client-side data science pipelines.
At Cerence I achieved over 98% model accuracy, authored and maintained roughly 2,000 grammar files (JSGF, BNF), curated large multilingual datasets, and diagnosed and resolved high-priority user-facing NLU and ASR bugs.
I prototype LLM-powered tutoring workflows and scalable NLU architectures, contribute to open evaluation initiatives, and aim to apply my localization, annotation, and prompt-engineering skills to improve real-world products through cross-functional collaboration.
Experience
Work history, roles, and key accomplishments
Prompt Engineer
Cohere For AI
Jan 2025 - Present (7 months)
Contributing to an open-science initiative by evaluating model performance and refining prompt-completion pairs in Japanese to improve NLU and representation of non-English languages.
Japanese Language Specialist
Freelance
Jan 2024 - Present (1 year 7 months)
Completed five 150-minute multi-turn model evaluations delivering rubric-based feedback and rewrites integrated into client data-science pipelines; diagnosed ~30 user-facing bugs for an in-car voice assistant with same-day annotated analyses and delivered a 50-page usability report for a personalized tutoring startup.
Education
Degrees, certifications, and relevant coursework
YPYandex Practicum
Certificate, Data Science
2021 - 2022
Completed the Data Science Program at Yandex Practicum from 2021 to 2022.
DEDeepLearning.AI
Certificate, Prompt Engineering
2024 -
Completed the ChatGPT Prompt Engineering for Developers course through DeepLearning.AI in 2024.
COCoursera
Certificate, Generative AI
2025 -
Completed the Generative AI with Large Language Models course on Coursera in 2025.
DADataCamp
Certificate, Data Science (Python)
2022 -
Completed the Data Scientist with Python Track on DataCamp in 2022.
DEDeepLearning.AI
Certificate, LLM Application Development
2024 -
Completed the LangChain for LLM Application Development course through DeepLearning.AI in 2024.
ULUniversity College London
Bachelor of Science, Computer Science
1989 - 1992
B.Sc. Computer Science with honors from University College London completed from 1989 to 1992.
Availability
Location
IsraelAuthorized to work in
Job categories
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