Machine Learning Engineer II

Lessen

Machine Learning Engineer developing AI/ML solutions for property service technology company. Collaborating with teams to build intelligent systems and optimize existing processes.

Posted 5/30/2026full-timeChicago • Illinois • 🇺🇸 United StatesJuniorWebsite

Tech Stack

Tools & technologies

AWSAzureCloudETLGoogle Cloud PlatformHadoopPandasPythonPyTorchScikit-LearnSparkSQLTableau

About the role

Key responsibilities & impact

Design, deploy, fine-tune, and evaluate large language models (LLMs); develop effective prompting strategies to optimize performance for various business use cases.
Improve data quality by cleaning the company’s data and sourcing information from new data sources.
Use machine learning/ deep learning to enhance and automate processes in Lessen proprietary tools.
Translate business problems into scalable AI/ML solutions, particularly using LLMs.
Collaborate cross-functionally with teams to develop, refine, and scale data-driven procedures and workflows.
Foster a positive team environment.
Ensure confidentiality and integrity of internal and external data.
Perform ad-hoc projects and other duties as assigned.

Requirements

What you’ll need

PhD or Master’s degree in Math, Physics, Statistics, Computer Science, or other related fields
1-3 years of experience as a data scientist, working closely within a business
Strong mathematical and statistical skills
Programming Languages: SQL, Python
Understanding of ETL tools and database architecture
Familiarity with pytorch, pandas and cloud platform like AWS, Azure and GCP
Prompt engineering experience
Experience using a machine learning framework e.g. scikit-learn, pytorch or similar
Experience with a statistical software (e.g. R, SAS)
Experience with natural language processing
Advanced knowledge of Data Warehousing and BI best practices
Experience with big data tools such as Spark, Hadoop, etc.
Experience with Tableau or Superset

Benefits

Comp & perks

Competitive compensation
Health, Dental, Vision, Life, Disability options
401K retirement savings plan
Paid vacation, federal and floating holidays
Maternity/Paternity Pay
Career advancement opportunities
All the tools you'll need to be successful

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

large language modelsmachine learningdeep learningSQLPythonETL toolspytorchpandasnatural language processingbig data tools

Soft Skills

collaborationteam environmentdata-driven proceduresproblem-solving

Certifications

PhDMaster’s degree