Sr. Large Language Model (LLM) Prompt Engineer

Company Overview

Casetext has led innovation in legal AI since 2013, applying cutting-edge AI to the law to create solutions that enable attorneys to provide higher-quality representation to more clients, enhance efficiency and accuracy, and gain a competitive advantage. Our leadership and contributions in legal AI have been recognized worldwide, including receipt of the World Economic Forum’s Technology Pioneer award for the development of AI-powered brief analysis tool CARA AI. Today, over 10,000 law firms—from solos and small practices to more than 40 Am Law 200 firms—rely on Casetext to elevate the quality of their law practice. For more information visit

About the Role

We are searching for a Prompt Engineer who possesses a blend of knowledge in the legal domain and software engineering. Your key responsibility will be to write prompts for large language models to better serve the legal industry. Your unique blend of skills will assist us in creating AI solutions that meet the intricate requirements of the legal field. You will be working with the most cutting edge AI tools in the world and pushing them to the limit of what is possible. This role is entirely remote, but you must be based in the U.S. and authorized to work in the U.S.

As the Sr. Large Language Model Prompt Engineer You Will:

  • Design, implement, test, and refine prompts for language models tailored to the legal industry, ensuring delivery of accurate, legally sound, and contextually appropriate responses
  • Liaise with legal professionals and other teams at Casetext to gather requirements
  • Integrate the language models into multi-step systems, assessing their performance and making necessary modifications
About You:

  • Juris Doctor Degree, preferably with time as a practicing attorney
  • Degree in Computer Science, Artificial Intelligence or a related field
  • At least 3 years of working experience in Software Engineering, including some experience working with machine learning models.
  • Proficiency in Python 
  • Prefer someone with experience working with OpenAI's GPT models or other large language models
  • Excellent analytical and problem-solving skills
  • Ability to work both independently and in a collaborative environment
  • Strong interpersonal and communication skills, capable of explaining complex concepts in simple terms
  • Prefer someone with experience in legal technology or in developing AI solutions for the legal industry
  • Experience in a R&D role is preferred, but not required

Salary Range: $170-190K 

Casetext Benefits

  • Competitive compensation
  • Exciting and meaningful work with an ambitious and passionate team
  • You’ll be a leader at a fast-growing start-up, take on a lot of responsibility, and play a substantial role in the future of the company
  • Medical, dental, and vision insurance is covered for you, and we cover 50% for spouses and dependents
  • Health FSA & Dependent Care FSA
  • Short-Term & Long-Term Disability
  • Professional Development Budget
  • Annual Wellness Budget
  • One-time Technology Budget
  • Flexible, remote-first work culture
  • Generous parental leave
  • Unlimited PTO 
  • We’re a close-knit team of smart, driven people who really enjoy working together
On August 17, 2023 Thomson Reuters acquired Casetext, Inc. Over the coming months, Casetext and Thomson Reuters will work together to integrate the business and employees into Thomson Reuters. More will be communicated in the coming months about the transition.


Casetext is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All aspects of employment, including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, veteran status, or any other status protected under federal, state, or local law.

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