Co-op - Machine Learning Engineer (Spanish/Portuguese)

At Lendbuzz, we believe financial opportunity should be more personalized and fair. We develop innovative technologies that provide underserved and overlooked borrowers with better access to credit. From our employees to our dealers, partners, and borrowers, we’ve built a company and a culture around a resolute belief in the promise and power of diversity. We value independent and critical thinking.

We are seeking an enthusiastic Machine Learning Co-op to join our team, focusing on our sales and collection AI chatbot projects within ou r Language Understanding and Semantic Analysis group. Ideal candidates should be proficient in Spanish or Portuguese , eager to explore the intricacies of the auto loan industry, and interested in building real-world applications of Large Language Models (LLMs ). You will gain hands-on experience with large-scale data annotation, data cleaning, multilingual model evaluation, and product design.

Key Responsibilities:

• Annotate chat data from sales-dealers and customers to train AI chatbots
• Develop and refine prompts and Retrieval-Augmented Generation (RAG) technique cvg cant es to enhance the performance of zero-shot and few-shot language models (LLMs)
• Assess the needs of dealers and customers, and implement AI chatbot functionalities to address those needs
• Fine-tune language models as time permits and based on the availability of annotated data

Requirements:

• Proficiency in either Spanish or Portuguese (spoken and written) is required
• Pursuing a Bachelor’s degree in Computer Science or a related field, pursuing a M.S in Computer Science or a related field preferred (graduation date of December 2026 or later)
• Coursework or experience in Data Structures, Algorithms, Linear Algebra, Probability, and foundational Machine Learning and Artificial Intelligence concepts
• Familiarity with Python and its data analysis libraries
• Strong grasp of core CS and ML concepts
• Interview process will include questions on coursework, coding, probability, machine learning, and Linux fundamentals
• Able to work 3-4 days in our downtown Boston office full time from January-August 2026

$22 - $30 an hour

We believe:

Diversity is a competitive advantage. We celebrate our differences, and are better when we have a variety of experiences, viewpoints, and backgrounds.

Compassion is a strength. We care about our customers and look to build long-term relationships with them.

Simplicity is a key feature. We work hard to make our forms and processes as painless and intuitive as possible.

Honesty and transparency are non negotiable. We incorporate these traits in all of our interactions.

Financial opportunity belongs to everyone. We work every day to improve lives by extending this opportunity.

If you believe these things too then we would love to hear from you!