Best X Builds

AI hiring in United States

95 AI and ML jobs in United States posted on X by a founder, hiring manager, or teammate. Location is whatever the original post said.

95 roles · updated 2026-11-10

Senior Engineer

Engineering

VeryAI

Senior engineer. Go, TypeScript, and React. Remote in the US.

Remote, US@VeryAI

Engineer

Engineering

Paradev

Engineer, in the office in San Francisco five days a week. Show work you have shipped. Posted by a cofounder.

San Francisco@FlyaKiet

Google DeepMind

Research engineer on Gemini large scale pretraining. London or Mountain View. Posted by a research engineer on the team.

London / Mountain View@zacharynado

OpenAI

Developer experience engineer with the cyber team. San Francisco. Posted by the head of developer experience.

San Francisco@romainhuet

GPC

Senior infrastructure engineer. Get client AI systems into production. 130k to 200k. New Haven preferred, remote in the US. Posted by the founder.

New Haven preferred, remote US@rubenhassid

Shadow

Three full-stack engineer seats. Posted by the CEO of Darkroom and Shadow. Most roles are New York preferred, some remote.

New York preferred@darkroomlucas

Shadow

Senior data engineer. Same hiring post. Posted by the CEO.

New York preferred@darkroomlucas

STEM Fellow

Research

Anthropic

Four-month STEM fellowship with the research team. Posted by the head of drug discovery research.

Remote-friendly, United States@nc_frey

GTM Intern

Content / Media

Photon

GTM intern, two seats, on-site in San Francisco. Email juliec@mail.grokbot.com. Posted by the CMO.

San Francisco@0xJuliechen

Marketing

Content / Media

Photon

Full-time marketing, on-site in San Francisco. Same post. Posted by the CMO.

San Francisco@0xJuliechen

DevRel

Engineering

Photon

Full-time developer relations, on-site in San Francisco. Same post. Posted by the CMO.

San Francisco@0xJuliechen

Farsight

Graphic and marketing designer. New York preferred, not required. Comment a portfolio. Posted by the cofounder.

New York preferred@noahfaro

aion

Senior product design, hybrid, across San Francisco, New York, London, and beyond. Posted by the company.

San Francisco / New York / London@aionxyz

aion

Senior design engineer on the same hiring post. Posted by the company.

San Francisco / New York / London@aionxyz

Human Archive

Robot learning intern in the San Francisco office. Posted by the founder.

San Francisco, CA@babugi28

OpenAI

Two senior seats on the plugins developer platform. San Francisco, relocation provided. Posted by someone on the team.

San Francisco, CA@mxstbr

OpenAI

Android engineer on the same plugins platform. San Francisco, relocation provided. Posted by someone on the team.

San Francisco, CA@mxstbr

Prime Intellect

Agent harnesses, cloud agents, self-improving loops, sandboxes, evals. SF, in person. Posted by someone on the team.

San Francisco, United States@kevinjosethomas

Engineer

Engineering

Aside

Memory, computer use, compaction, agent loop. $160k to $300k plus equity. SF, in person. Posted by the CEO.

San Francisco, United States@hyojun_at

NVIDIA

Reasoning models, generative simulation, agentic workflows, Physical AI safety. Start by January 2027. Posted by the AV research lead.

Santa Clara, United States@drmapavone

NVIDIA

Same ASPIRE lab. Research engineer track for autonomous vehicles and Physical AI. Posted by the AV research lead.

Santa Clara, United States@drmapavone

Robocurve

Frontier robotics evals. $170k-$300k, $5k referrals. San Francisco, in person. Posted by the co-founder.

San Francisco, United States@chooi_jeq

Convergent Research

Launch focused research orgs for AI resilience: compute governance, biosecurity, formal verification. Posted by a teammate.

Remote, United States@AGamick

Andera

AI agents for audit. $37M Series A. San Francisco, on-site. Posted by a teammate at Hack the North.

San Francisco, United States@natashajchen

Andera

Product engineering lead for AI audit agents. San Francisco, on-site. Posted by a teammate.

San Francisco, United States@natashajchen

Andera

Infrastructure for AI audit agents. San Francisco, on-site. Posted by a teammate.

San Francisco, United States@natashajchen

Lead AI Engineer

Engineering

Andera

Lead AI engineer for audit agents. San Francisco, on-site. Posted by a teammate.

San Francisco, United States@natashajchen

Product Engineer

Engineering

Andera

Product engineer for AI audit agents. San Francisco, on-site. Posted by a teammate.

San Francisco, United States@natashajchen

Marble

Founding engineer, in person in NYC. YC S26, restaurant back-of-house AI. Posted by a co-founder.

New York, NY@arjunjchaliha

Apollo Research

Science comms, engagement, or policy research. On-site DC. Posted by the chief AI governance officer.

Washington, DC, US@charlotte_stix

LearnVector

Design engineer, in-person Mountain View. Andrew Ng's learning product. Posted by the hiring person on the team.

Mountain View, CA@dimapyanov

Factory

Engineering for Droid, the software development agent. Posted by a teammate.

United States@_AbhaySinghal

Research

Research

Factory

Research for self-improving software development. Posted by a teammate.

United States@_AbhaySinghal

Kairos

Lead the in-person residency for AI safety generalists. $140-270k. Posted by a co-founder.

Berkeley, CA@austinc3301

Proximal

Build the applied research function and sit with customers. North Beach, SF. Posted by a co-founder.

San Francisco, CA@MatternJustus

ZeroDrift

AI lab that trains its own models. Compliance on agent communications. NYC. Posted by the team.

New York, NY@chobberoni

ASAPP

Enterprise contact-center AI. Ship, not just roadmaps. Posted by someone on the team.

New York / Mountain View@Aishwaryaradhya

Encode

Lab engagement and AI policy in San Francisco, with regular DC trips. Founder post. Email sneha@encodeai.org by Sep 4.

San Francisco, CA@SnehaRevanur

The Browser Company

Engineering-heavy prompt role on Dia. Prototypes, harnesses, evals, shipping in a large codebase. Posted by Nick Dobos.

New York, NY@NickADobos

The Browser Company

The product-leaning prompt role on Dia. Open to designers, artists, and other non-traditional backgrounds. Same post.

New York, NY@NickADobos

Anthropic

Scientific judgment and ops for drug discovery work. NYC and SF. Posted by someone on the team.

San Francisco / New York, NY@nc_frey

Tessl

DevRel for agent skills and context. San Francisco. Posted by the company.

San Francisco, US@tessl_io

Tessl

DevRel for agent skills and context. New York. Same Tessl hiring thread.

New York, NY@tessl_io

Profound

Applied AI for an enterprise marketing harness. SF and NYC, no remote. Posted by the CTO.

San Francisco / New York, NY@dbabbs

Engineer

Engineering

Merge

Engineers in SF and NYC. Connective layer for AI in product and workforce. Posted by the cofounder.

San Francisco / New York@GilFeig

Mintlify

Applied AI engineer. Hiring across San Francisco and New York.

San Francisco / New York, USA@mintlify

Periodic Labs

Turn scientists' experiments into hardware setups and instrument workflows. Up to $250k. a16z Build list, Aug 17.

Menlo Park, US@katieschwartz

Inferact

Head of Engineering on the vLLM inference stack. Up to $280k, SF. a16z Build list.

San Francisco, US@katieschwartz

Munari

a16z Speedrun. Reliability infra so robots work in the real world, not just the lab. On-site SF.

San Francisco, US@katieschwartz

OpenAI

Lead senior full-stack engineers building AI-native learning in ChatGPT. a16z Build list.

San Francisco, US@katieschwartz

OpenEvidence

Elite engineer on special projects with the founders. Sequoia partner Shaun Maguire posting. Medical AI used by most US doctors.

San Francisco / Miami, US@shaunmmaguire

Tenera

a16z Speedrun-backed. Predict how users react to software before you ship. Own agent infra, backend, and frontend.

San Francisco, US@katieschwartz

Town

Personal AI assistant after a $55M Series A. Rethink email, calendar, and contacts. Posted by a16z New Media.

San Francisco / New York, US@thedanigrant

Phylo

AI biomedical discovery lab. Work with pharma and biotech. Up to $275k. a16z Build list.

South San Francisco, US@katieschwartz

Product Engineer

Engineering

Runta

Safer execution environment for agents. $20M seed. SDK, CLI, APIs, DX. Up to $200k. a16z Build list.

San Francisco, US@katieschwartz

Wintermute

Open roles across C++ quant and trading-platform engineering, ML research, options and prediction-market trading, DeFi trading, and product. London, NYC, Singapore and more.

London / NYC / Singapore@wintermute_t

Alloy Robotics

Just raised $8M at an $80M valuation to build agents over robotics data. Hiring FDE, Full Stack Software Engineer, ML Engineer, plus AE, Chief of Staff and Growth. Usage up 51% MoM.

Remote (US)@_joe_harris_

Product Engineer

Engineering

Overlap AI

Build outcome-based pricing product. High shipping velocity. US work authorization required.

US (Remote/Hybrid)@caseytraina

Brix AI

AI Product Manager Intern role at an HF0-incubated AI company building proactive AI workforce agents.

Palo Alto / Shanghai / Remote@PeihongD

AI-native agency (Bradford Huber)

Looking for a talented designer to join an AI-native agency with early traction.

Remote / US preferred@BradfordHuber4

Fast-growing open source AI company

Build core LLM infrastructure: gateways, MCPs, agent workflows, evals and developer tooling. US only.

US only@neilkanakia

Mistral AI (Forge team)

Openings for Research Engineers and Applied Scientists across Paris, London, Singapore, US and Korea.

Paris / London / Singapore / US / Korea@hkproj

VC-backed startups (via Clera)

Exceptional engineers for SF and NYC startups. Base up to $300k plus meaningful equity.

SF & NYC@_sebastianscott

Ryze

Build autonomous marketing and creative systems. Above-market pay. Remote OK.

Remote (SF preferred)@irabukht