Carta Verified

Fintech, SaaS, Equity Management

Legal Product Builder

Toronto, ONOnsiteFull TimeCA$166,000–CA$196,000 /yrPosted 1 month ago

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Required skills

AI-powered legal products
legal judgement
AI agent
contract review
compliance
evaluation criteria
test cases
feedback loops
agent performance
failure modes

Nice to have

commercial contract negotiation
legal tech company
hybrid legal/product role
contract automation
document intelligence
negotiation tooling

Role summary

Carta Law is seeking a Legal Product Builder to bridge the gap between legal expertise and AI technology. This role involves building AI-powered legal products by translating complex legal judgment into scalable systems and agent-driven experiences. You will develop evaluation criteria, test agent performance, diagnose failures, and prototype new legal capabilities using AI tools. The ideal candidate is a lawyer with 4+ years of experience, strong product thinking, technical fluency, and the ability to work autonomously. Experience in contract negotiation, legal tech, or building products from scratch is a plus.

The Company You’ll Join

Carta is the connected platform and AI-native ecosystem for private capital. Built to replace fragmented tools with a single system of record, Carta brings together the software, services, and legal infrastructure that founders use to manage equity, fund managers use to run administration and reporting, and legal teams use to close transactions. Trusted by 55,000 companies and 1.8M+ equity holders in 160+ countries, and 10,000 funds and SPVs representing $250B+ in assets under management, Carta is transforming how private capital operates. Recognized by Fortune, Forbes, Fast Company, Inc. and Great Places to Work.

For more information about our offices and culture, check out our Carta careers page.

The Problems You'll Solve

As a Legal Product Builder, you will sit at the cutting edge of building technology around the practice of law. You will:

Build AI-powered legal products alongside engineers and product managers: Bring deep legal expertise into the product development process, helping turn complex legal work into scalable, agent driven experiences

Translate legal judgement into systems: Break down legal processes like contract review and compliance into the decisions, rules, workflows, exceptions, and escalation points an AI agent needs to navigate

Teach our agents what "good" looks like: develop examples, evaluation criteria, test cases and feedback loops that help our legal agents produce accurate, useful, and trustworthy work.

Evaluate and improve agent performance. Test against real world scenarios, identify where the reasoning or outputs fall short, diagnose failure modes, and partner with engineers to improve them. Anticipate ambiguity, edge cases, conflicting information and situations requiring human judgement and determine how our products should handle them

Prototype new legal capabilities: use AI tools directly to experiment with prompts, workflows, and agent behaviour, moving from an idea to a working prototype before or alongside engineering to shape what we build next

The Team You'll Work With

You'll join Carta Law, an AI-native legal services firm that sits at the intersection of legal expertise and cutting-edge technology. The team's philosophy is full ownership — Carta Law doesn't sell tools, it delivers legal and compliance services end to end, from intake to negotiation to execution and reporting. You'll work alongside top AI engineers and legal professionals who are actively reimagining how legal work gets done, from agents that negotiate agreements to document intelligence and extraction tools to a dedicated platform combining agents, workflows, and human lawyers.

About You

Legal Background: You're a lawyer with 4+ years of substantive training and experience, whether that's Big Law, in-house at an asset manager or PE firm, or comparable legal practice or within a legal-adjacent role.

Product Thinking: You have a demonstrated track record of identifying where legal workflows break down and proposing (or actually building) something better.

Technical Fluency: You don't need to write code, but you're comfortable sparring with engineers on how AI products are built and can translate legal judgment into something a technical team can act on.

Communication & Autonomy: You're a strong written communicator with sharp judgment, and you operate with a high degree of independence.

Nice to have: Direct commercial contract negotiation experience (NDAs, subscription agreements, transaction docs); prior time at a legal tech company or in a hybrid legal/product role; familiarity with contract automation, document intelligence, or negotiation tooling; founder experience or having built something from scratch.

Salary

Carta’s compensation package includes a market competitive salary, equity for all full time roles, exceptional benefits, and, for applicable roles, commissions plans. Our minimum cash compensation (salary + commission if applicable) range for this role is:

$166,000 - $196,000 in Toronto, Ontario, Canada.

Final offers may vary from the amount listed based on geography, candidate experience and expertise, and other factors.

Disclosures:

We are an equal opportunity employer and are committed to providing a positive interview experience for every candidate. If accommodations due to a disability or medical condition are needed, please connect with the talent partner via email.

Carta uses E-Verify in the United States for employment authorization. See the E-Verify and Department of Justice websites for more details.

For information on our data privacy policies, see Privacy, CA Candidate Privacy, and Brazil Transparency Report.

Please note that all official communications from us will come from an @carta.com or @carta-external.com domain. Report any contact from unapproved domains to security@carta.com.

Sample Carta interview questions

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Architect a highly available platform that coordinates the complex logistics of picking up and dropping off hot meals.
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How would you design a flight booking system for a major airline?
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I want you to architect a highly available service that provides location based weather data with minimal latency.
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Let us build the backend for a smart parking garage. How do you manage inventory and process payments in real time?
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Draw the architecture design and explain the technical details for a program you managed.
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