Sales engineer

United States. Not Diamond is the leading intelligent AI optimization platform. We help AI/ML teams at leading startups and global enterprises automatically improve prompts, optimize agents, and intelligently route queries across the constantly evolving model landscape to rapidly drive quality improvements at the frontier.

We improve workflow accuracy by as much as 50% or more and save the YC/Sequoia/a16z startups we work with an average of 160 engineering hours per month, with larger enterprises saving tens of thousands of engineering hours per year.

We’re backed by Jeff Dean (Google), Julien Chaumond (Hugging Face), Ion Stoica (Anyscale, Databricks), Zack Kass (OpenAI), Olivier Pomel (Datadog), Akshay Kothari (Notion), Arash Ferdowsi (Dropbox), Tom Preston-Werner (Github), Guillermo Rauch (Vercel), Scott Belsky (Adobe), Jeff Weiner (LinkedIn), Eoghan McCabe (Intercom), and many more. Why this role mattersWe believe in a multi-model future.

The world won't have one single, giant model that everyone sends everything to—instead, there will be hundreds of foundation models and billions of agentic systems running on top of them. We believe this is not only a better future for AI, but a safer one as well. But for this to happen requires massive infrastructure shifts that can enable us to better leverage the strengths of diverse models in a constantly evolving landscape.

We started Not Diamond to enable this multi-model future. In this role, you’ll work closely with our founding team to help define and execute our technical vision and contribute to a world-class research, engineering, and GTM organization. We want to work with immensely thoughtful, voraciously curious, and mission-driven contributors.

You will play a pivotal role in driving forward GTM through technical sales, communicating sales insights back to inform product engineering decisions, helping support customer PoCs and other pre‑sales testing, supporting key account management post‑sales, and improving our technical sales processes.

Ideally we’re looking to work with folks who have over 8 years of experience across technical sales and account management, with a focus in AI, ML, developer tools, and infrastructure. We’re offering a competitive salary, generous equity, and robust

benefits. And while we think of this as an opportunity to build a generational company from the ground‑up, we also guarantee an investment in your next startup if you ever decide to build something yourself in the future. Our team is guided by top‑percentile ambition, constant learning, and a bias towards action, and our focus on execution is rooted in a dedication to emotional intelligence, high integrity, and the ability to work through healthy conflict.

8+ years of experience across sales engineering and account management with a focus in AI, ML, developer tools, and infrastructureExperience with both pre- and post-sales technical customer engagementsExperience selling highly technical products in the 0 to 1 phaseExceptional communication skills and emotional intelligenceExceptionally versatile and high ownershipComplementary qualitiesAbility to be hands on keyboard and drive forward technical implementationsData‑driven approach to decision making and strategy developmentStrong OSS contributions / developer community engagement (nice to have)Leadership, hiring, and management skills (nice to have)Experience working in a startup environment of Compensation,

benefits, and perks$185-275K salary (70% base + 30% variable) plus equity*San Francisco and New York office spacesFull remote friendly policyUnlimited paid time offPaid parental leave$3000 yearly personal equipment and personal development stipend($50K*years at Not Diamond) investment in your next startup* Final compensation offers are based on a candidate's years of experience, geographic location, and personal preferences for balancing between cash and equity.

To applyPlease apply below and we’ll get back to you within 24 hours. ApplyIf this isn’t the right role for youPlease take a moment to reflect on the 1 or 2 most brilliant collaborators you’ve ever worked with and consider whether this might be a fit for them. We offer $10K for a successful referral.

You can also let us know what you’re looking for in your next role and we can try to connect you to other companies who might be relevant—we’re close with a wide network of frontier AI startup founders. If you can think of a different way of contributing to what we’re building, please get in touch.

Our teamWe are a small team of serial founders and ML/AI engineers who have built venture scale companies, led growth from 0 to tens of millions in revenue, shipped code to billions of users, and published in top AI journals.

Alejandro Companioni, founding engineerFormer senior MLE, Spotify, Stitchfix, Devoted HealthMS in Computer Science at New York UniversityFormer head of revenue at Noyo, CRO at Promise, COO at Verikai, SVP Sales at Yodlee, head of strategic partnerships at WePay, founder and CEO at VitalityMBA at Stanford GSBBA in Economics at University of MichiganFormer senior frontend engineer, Groundfog, PitechPlusMS in sports therapy, Universitatea Ștefan cel Mare din SuceavaBS in CS, American University of ArmeniaBA in Political Science, University of ChicagoJames Kunstle, machine learning engineerFormer team lead and senior MLE, Red HatFormer research scientist, Meta, Amazon, SISSA, FBKPhD in AI at Universitat Pompeu FabraBS in Computer Science at University of California, BerkeleyFormer co‑founder and CEO, Greener, ATLAZFormer PM, Kolibri #J-18808-Ljbffr.

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