Senior NLP Scientist for GenAI & LLM Apps (Remote)

Justjoin; United States; Remote; USD 150,000 - 190,000; Full time

Job summary

Justjoin, a consumer intelligence platform, is hiring a Senior Data Scientist to build NLP models and GenAI solutions that extract meaning from massive consumer datasets. You'll develop sentiment analysis, emotion detection, and LLM-based applications that inform multi-million dollar marketing and product decisions for global brands.

This is a remote position reporting to our CTO. You will deploy NLP models, design prompt engineering, RAG architectures, and fine-tuning, collaborate with data

Qualifications

• 2–4+ years in data science roles with production model development.
• 1–2+ years focused on NLP tasks (sentiment analysis, classification, topic modeling).
• Minimum 1 model deployed to production or demonstrably used to inform business decisions.

Responsibilities

• Develop and deploy NLP models for sentiment analysis, emotion detection, and text classification processing 1M+ documents daily.
• Design and implement LLM-based solutions using prompt engineering, RAG architectures, and fine-tuning approaches.
• Build evaluation frameworks to measure model accuracy, establishing baselines and tracking improvements.
• Collaborate with data engineers and AI engineers to productionize models via API endpoints and batch pipelines.
• Work with multi-language text data (English primary, with global market expansion).
• Translate business requirements into technical model specifications.
• Document model architectures, performance metrics, and usage guidelines for cross-functional teams.
• Iterate on models based on client feedback and production performance data.

Skills

Python

SQL

ML/NLP libraries

LLMs / GenAI

Git workflows

Education

Bachelor's degree in CS/Stats/Math

Tools

Azure

Databricks

LangChain

PySpark

Hugging Face

Job description

Justjoin, a consumer intelligence platform, is hiring a Senior Data Scientist to build NLP models and GenAI solutions that extract meaning from massive consumer datasets. You'll develop sentiment analysis, emotion detection, and LLM-based applications that inform multi-million dollar marketing and product decisions for global brands.

This is a remote position reporting to our CTO. You will deploy NLP models, design prompt engineering, RAG architectures, and fine-tuning, collaborate with data