About the role

About Lightfield Lightfield is an AI-native CRM that assembles itself from your email, calendar, and meetings. It captures every interaction and turns it into organized context: accounts, tasks, follow-ups, and insights, so nothing slips through the cracks. We’re rethinking CRM from first principles. Instead of forcing teams to maintain rigid systems, Lightfield learns from how companies actually work, adapting, automating, and surfacing the insight that drives growth. We’re building the CRM platform we always wished existed: fast, intelligent, and genuinely helpful. We are backed by Greylock, Lightspeed, and Coatue, and our founders previously built Tome, a generative AI presentation product used by over 25 million people. Before Lightfield, our team worked on Llama, Instagram, Facebook Messenger, Pinterest, Google, and Salesforce.

About

the role Lightfield's AI/ML team builds the experiences at the core of our product, developing new applications to wow our customers. Today,

the team is focused on building a powerful, domain-specific AI that outperforms generic LLMs We’re inspired by the challenge of creating innovative new AI products for people doing serious work, and we’re looking to grow our AI/ML team to meet that challenge.

What you'll do Create and ship magical, highly-differentiated AI experiences that sales teams can’t live without Craft Lightfield AI/ML strategy in tight collaboration with founders and execs Pioneer the training of new models that leverage both historical data and synthetic training data Prototype innovative, LLM-powered experiences, and drive their development into robust product features Help build a world class AI/ML engineering team by recruiting and mentoring teammates

Who you are You have 5+ years of industry experience in NLP, with a strong portfolio of model training You have a strong understanding of deep learning AI/ML frameworks or cloud services You have hands-on ML Ops experience You possess deep expertise in NLP and model training, specifically with LLMs Proven experience adapting open-source generative models for specific use cases, demonstrating a deep understanding of its architecture and capabilities

Lightfield is an AI-native CRM built for the modern era, designed to replace legacy tools like Salesforce and HubSpot by assembling itself automatically from a team's email, calendar, and meetings. Founded with the mission to become the definitive system of record for the AI era — just as Salesforce defined the cloud era — Lightfield is rethinking CRM from first principles: instead of forcing teams into rigid systems, it learns from how companies actually work, adapting, automating, and surfacing insights that drive growth. The company is backed by top-tier investors including Greylock, Lightspeed, and Coatue, and its founders previously built Tome, a generative AI presentation product used by over 25 million people. The team brings deep pedigree from Llama, Instagram, Facebook Messenger, Pinterest, Google, and Salesforce. Traction has been exceptional: over 3,000 companies have signed up for the product, with more than 100 new sign-ups every week and roughly 30 converting to paying customers weekly. Customers include notable names like Substack and Distill. Lightfield operates a dual go-to-market motion — a high-velocity self-serve PLG funnel paired with a direct sales motion targeting Series A/B startups — and is scaling rapidly with plans to grow its sales team from 1 to 7 AEs by end of year. The culture is high-intensity, mission-driven, and in-office four days a week, attracting missionaries over mercenaries who are genuinely excited about building a category-defining company.

Machine Learning Engineer, Applied Research and Model Development

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