Product Engineer
Spellbook is the most comprehensive AI copilot for transactional lawyers. It works directly inside Microsoft Word to help legal teams draft, review, and negotiate contracts up to 10x faster and with greater precision. Today, more than 4,000 law firms, in-house teams, and solo practitioners rely on Spellbook to simplify their workflows and eliminate the drudgery of everyday contract work.
We are backed by leading investors including Khosla Ventures, Thomson Reuters Ventures, Inovia Capital, The LegalTech Fund, Bling Capital, and Moxxie Ventures. The company recently raised $50 million in Series B funding, led by Keith Rabois at Khosla Ventures, bringing its total funding to more than $80 million.
*This is an existing vacancy
We're hiring full-stack engineers who decide what to build, not just how to build it. You'll own a product area from problem to launch: talk to customers, write the brief, prototype fast, test it with users, and take what works to production. You'll work with Product, Design, and legal experts, and you're expected to bring your own point of view on what matters.
Responsibilities
Own a product area end to end: Take it from a fuzzy problem to a scoped plan, a prototype, an iteration loop, and a production launch. Measure whether it worked.
Run product discovery: Talk to lawyers and internal experts, write briefs, propose hypotheses, and prototype to test them. Say no to ideas that don't hold up.
Build across the stack: Design, ship, and maintain features across React, Node services, and AI inference.
Build LLM-powered features: Work with models from OpenAI, Anthropic, and others, including evaluations, prompt and agent orchestration, and safety.
Work with coding agents: Use them every day, and help set the team's standards for them. Keep security, correctness, and maintainability high while moving faster.
Own quality and reliability: Improve performance, observability, and reliability. Triage issues, write tests, review code, and close the loop with users.
Qualifications
5+ years building and shipping production software, with a firm grasp of the fundamentals.
Clear communication. You can explain and advocate for your ideas to engineers, designers, and lawyers.
You've taken a feature from a vague idea to a prototype to customers' hands. You can walk us through the calls you made and what users taught you.
Product sense. You've changed scope, cut a feature, or pushed back on a plan, and can explain what happened.
Full-stack depth, with TypeScript and React on the front end and Node on the back end.
Regular use of coding agents or other AI tools, with concrete examples of how they changed your speed or quality.
You step in when things break, and you look for ways to improve how the team works.
Nice to haves
Experience with design systems, UX writing, or accessibility.
Experience running user interviews, prototype tests, or A/B tests.
Experience in a small startup or another role with broad ownership.
Experience building LLM features, evaluations, or agent workflows.
Tech Stack
OpenAI, Anthropic, and other large language models (LLMs), React, Node, TypeScript, MongoDB, Docker, AWS, CDK, tRPC
This role is not subject to Ontario's salary range disclosure requirement, as total compensation exceeds the threshold set out in the exemption. We're happy to discuss compensation details directly with candidates as the process progresses.
WHY JOIN SPELLBOOK?
Embrace autonomy and accountability in a flexible work environment; we focus on outcomes and empower you to determine how to get the job done
Access our company-paid group benefits for you and your family, with $1,000 towards mental health support
Disconnect during our holiday closure and take advantage of our generous time off policies throughout the year
Enjoy monthly paid meals, an annual wellness allowance to support your well-being and parental leave top-ups as your family grows
Secure your stake in our success; you’ll receive competitive stock option grants as a pivotal early employee