Senior Data Scientist - Remote ML for Chat & Search

QuintoAndar; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Profit sharing

Meal allowance

Home office allowance

Health insurance

Dental insurance

Life insurance

Childcare subsidy

Wellhub program

Job summary

QuintoAndar is seeking a Senior Data Scientist embedded in a product squad to design, build, and ship ML-powered features for chatbots and search. This role blends hands-on modeling with experimentation and leadership, collaborating with product managers, engineers, designers, and other data professionals.

The position emphasizes applied generative AI, LLM workflows, and mentoring within a remote-first setup based in Brazil, with optional access to offices or coworking spaces.

Qualifications

• Three or more years of experience applying data science and building ML models.
• Strong knowledge of core ML concepts: regression, classification, clustering, neural networks, cross-validation, bias-variance tradeoff, explainability.
• Experience deploying ML systems to production and awareness of engineering challenges.
• Proficiency in Python; experience with deep learning; strong written and verbal English.

Responsibilities

• Architect, develop, and deploy machine learning systems to production, with primary use cases around chatbot and search experiences
• Design and execute experiments that inform product and model decisions
• Analyze structured and unstructured data to improve existing models or develop new approaches
• Apply the scientific method to build LLM-powered applications, including prompt testing, capability exploration, agent evaluation, guardrail assessment, and generative AI proof-of-concepts
• Provide technical guidance across the data science community, including design reviews, demos, and chapter-level discussions

Skills

Python

ML concepts

Experimentation

LLM/Generative AI

English proficiency

Data analysis

Technical leadership

Communication

Education

Master's in ML / CS

Bachelor's + substantial experience

Tools

PyTorch

TensorFlow

scikit-learn

Hugging Face

Job description

QuintoAndar is seeking a Senior Data Scientist embedded in a product squad to design, build, and ship ML-powered features for chatbots and search. This role blends hands-on modeling with experimentation and leadership, collaborating with product managers, engineers, designers, and other data professionals.

The position emphasizes applied generative AI, LLM workflows, and mentoring within a remote-first setup based in Brazil, with optional access to offices or coworking spaces.