Member of Technical Staff, AI Developer Experience

Crosby Legal, Inc.; New York (NY); On-site; USD 120,000 - 160,000; Full time

Job summary

Crosby Legal, Inc. is seeking an AI Developer Experience Engineer to play a critical role in building internal systems for developing and shipping AI features. You will focus on improving developer experience around LLMs and create tools and infrastructure to enhance productivity.

The ideal candidate has 3+ years in software engineering, strong Python skills, and hands-on experience with LLMs and APIs. This position emphasizes building foundational systems to streamline workflows and increase developer velocity.

Qualifications

• 3+ years of software engineering experience, ideally working on developer tools, infrastructure, or platform teams.
• Strong proficiency in Python and experience building backend systems and internal tooling.
• Hands-on experience working with LLMs, APIs, and modern AI workflows.

Responsibilities

• Build AI developer tooling: Design and implement internal tools for prompt management.
• Improve iteration speed: Create systems for rapid testing and debugging of model outputs.
• Own evaluation infrastructure: Develop frameworks for benchmarking and monitoring AI system performance.

Skills

Software engineering experience

Python proficiency

LLMs and APIs experience

Systems thinking

Strong communication skills

Job description

About the role

As an AI Developer Experience Engineer at Crosby, you'll play a critical role in building the internal systems that enable our team to develop, evaluate, and ship AI features quickly and reliably. You’ll focus on improving the developer experience around LLMs, data, and experimentation — creating tools and infrastructure that accelerate iteration while maintaining quality.

You’ll partner closely with engineers, data scientists, and researchers to streamline workflows across prompting, evaluation, fine‑tuning, and deployment. This role is for someone who is obsessed with leverage — building systems that make other engineers dramatically more productive.

What you'll do

• Build AI developer tooling: Design and implement internal tools for prompt management, evaluation, experimentation, and model iteration.
• Improve iteration speed: Create systems that enable rapid testing, debugging, and comparison of model outputs across different approaches.
• Own evaluation infrastructure: Develop frameworks for benchmarking, regression testing, and monitoring AI system performance.
• Streamline data workflows: Build pipelines and tooling to support data collection, labeling, and feedback loops for model improvement.
• Support production systems: Partner with engineering teams to ensure AI features are reliable, observable, and easy to maintain in production.
• Enable the team: Identify bottlenecks in the development process and build systems that increase developer velocity and confidence.

Who You Are

• 3+ years of software engineering experience, ideally working on developer tools, infrastructure, or platform teams
• Strong proficiency in Python and experience building backend systems and internal tooling
• Hands‑on experience working with LLMs, APIs (e.g., OpenAI, Anthropic), and modern AI workflows
• Experience building systems for experimentation, evaluation, or data pipelines
• Strong systems thinking with the ability to design tools that scale across teams
• Highly pragmatic with a focus on improving developer velocity and real‑world outcomes
• Strong communicator who can work closely with engineers, researchers, and product teams
• Proactive, resourceful, and excited about building foundational systems in a fast‑moving environment

Equal Opportunity

Crosby is an equal opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or other applicable legally protected characteristics.

Background checks for applicants will be administered in accordance with applicable law, and qualified applicants with arrest or conviction records will be considered for employment consistent with those laws, including the New York City Fair Chance Act.

Pursuant to New York Labor Law Section 194-b, the US Pay Range for this position is listed in the job post. Final compensation will be determined based on skills, experience, and qualifications.