Best X Builds

Startup hiring in United States

74 startup jobs in United States that were actually posted on X, not copied from a board. Location is whatever the original post said.

74 roles · updated 2026-11-04

Brand Content Creator

Content / Media

Stan

Brand content creator and producer, from idea through the finished post. Full time in New York.

New York@ansonlin

X Specialist

Content / Media

Stan

Owns Stan's account on X, end to end. Full time in New York.

New York@ansonlin

Content Manager

Content / Media

Stan

Runs the content engine. Full time in New York.

New York@ansonlin

Product Engineer

Engineering

Speedrun

Product engineer for the talent tools. Full time contract in San Francisco. Posted by the lead for talent.

San Francisco@justmazer

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

Bolt

Account executive. Up to $400,000 OTE plus equity. DM Mern.

New York or San Francisco@mrinalsingh02

Aaru

Brand designer, in person in New York. Posted by a designer on the team.

New York, NY@senyil

Aaru

Design engineer on the same post, in person in New York.

New York, NY@senyil

CoreSpeed

Design engineer for the site, dashboard, and docs. $10,000 a month to start. Comment or DM Milton.

Remote or San Francisco@miltonheyan

GTM Engineer

Engineering

PumpGTM

Engineer for GTM and CRM products. Paid work trial, then long term. Office in San Francisco, remote okay.

San Francisco or remote@NamanyayG

Fluxera

Founding GTM. 100k to 120k plus equity. San Francisco startup and VC networks preferred. Posted by the founder. DM.

San Francisco preferred@Shubham_6x

Fluxera

Solutions engineer. 35k to 40k plus equity. Same post. DM.

Remote, San Francisco preferred@Shubham_6x

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

Sunday Robotics

Senior product manager for infra, scaling consumer robot deployment. Posted by the head of product.

Redwood City, CA@brainstub

Noise

Founding designer, onsite in New York. Work trials are paid. Posted by the maker.

New York@lucacs

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

Growth

Startups

Ambi

Growth hire in San Francisco, beside the marketing lead. DM her. Posted by the marketing lead.

San Francisco@sheetaverma

Oku

Product designer. 2+ years, and DeFi experience. North America, Chicago preferred. Posted by the CEO.

North America, Chicago preferred@getty_hill

Constellation Space

Head of BD in Seattle. DoD, USSF, SDA, and NASA capture. $160k to $220k plus equity. Clearance eligible. Posted by the founder.

Seattle@KamranMajid11

Human Archive

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

San Francisco, CA@babugi28

Trigger.dev

Developer relations in San Francisco. Same hiring post. Posted by someone on the team.

San Francisco@jdkanani

Engineer

Engineering

Pilgrim Labs

Hardware that engineers, manufactures, and deploys biology. Posted by founding team. Reach out.

United States@MauricioMoel

Scientist

Research

Pilgrim Labs

Scientists on the same hiring tweet. Posted by founding team. Reach out.

United States@MauricioMoel

Warp

Own Salesforce, Snowflake, Clay, Outreach, Gong as Warp goes from a handful of reps to 100+. NYC, in person. Posted by the CEO.

New York, United States@ayushswrites

16VC

Fundraising, investing, founders, research. Bengaluru, London, or San Francisco. Email hr@16vc.co. Posted by the GP.

Bengaluru, India / London, UK / San Francisco, US

Corgi

Chief of staff in San Francisco. Email b@corgi.com with the role in the subject. Posted by the founder.

San Francisco, United States

Corgi

Investor relations in San Francisco. Email b@corgi.com. Posted by the founder.

San Francisco, United States

True Markets

Director of marketing and GTM in Noho, NYC. Posted by the founder and CEO.

New York, United States@vishalkgupta

Convergent Research

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

Remote, United States@AGamick

Audacious HQ

Recruiting, community, and platform for GTM in SF and NYC. Posted by the founding partner.

San Francisco / New York, United States@hellosprice

Shorebird

Founding engineer at a small Flutter tooling team. Posted by a teammate.

Remote, United States@AbhishekDoshi26

Shorebird

Business operations at a small Flutter tooling team. Posted by a teammate.

Remote, United States@AbhishekDoshi26

Hop Aero

Lead aerothermal for hypersonic rocket cargo. Orange, CA. Posted by the founder.

Orange, CA, United States

Hop Aero

Lead GNC for hypersonic rocket cargo. Orange, CA. Posted by the founder.

Orange, CA, United States

Designer

Design

Doji

Designer for social fashion shopping. NYC. Taste required. Posted by the company and the CEO.

New York, NY@doji_com

Photon

Senior engineer on developer-facing APIs and the backends behind them. Node, TypeScript, distributed systems. US. Posted by the cofounder.

United States

Engineer

Engineering

aaru

Engineers, NYC in person. Same team that is already hiring designers. DMs open.

New York, NY@senyil

Baro

Design, build, and maintain websites for consumer brands. Contract, NY preferred. a16z speedrun. DMs open.

New York, NY@edisonydlee

Sugar

Founding engineer in NYC. Equity plus competitive comp, $10k referral. Posted by the founder.

New York, NY@lukaivicev

Sixtyfour

Founding growth for agents that do enterprise research. SF in person. $120k to $150k plus equity. Posted by the CEO.

San Francisco, US@saarth_

Designer

Design

aaru

Designers who ship to code. NYC in person. Posted by a designer who just joined the team.

New York, NY@senyil

Periodic Labs

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

Menlo Park, US@katieschwartz

Northwood Space

Lead the Cloud team: antenna scheduling, booking, network orchestration. Up to $260k. a16z Build list.

Torrance / Los Angeles, US@katieschwartz

Inferact

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

San Francisco, US@katieschwartz

Astro Mechanica

Top technical authority for the military aircraft program. Propulsion, avionics, flight controls. Up to $300k. Secret clearance. a16z Build list.

San Francisco, US@katieschwartz

favorited

Own notifications, sharing, and core mobile flows. Up to $168k. a16z Build list.

Santa Monica, US@katieschwartz

General Medicine

PillPack founders. Own finding, pricing, booking, and follow-up for consumer healthcare. a16z Build list.

San Francisco, US@thedanigrant

Munari

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

San Francisco, US@katieschwartz

Airbase

Rebuild US radio spectrum infrastructure. Up to $225k, NYC. a16z Build list.

New York, US@katieschwartz

Galadyne

Ex-SpaceX propulsion lead. Design primary and secondary structures for flight vehicles. a16z Build list.

Austin, US@katieschwartz

a16z New Media

Build tools that help founders grow faster. Work with the a16z New Media team in SF.

San Francisco, US@thedanigrant

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

Gravity

Invent the design language for human and agentic care. Clinician and patient interfaces. a16z Build list.

New York, US@katieschwartz

Uplift

Ex-SpaceX/Tesla founders, $7M out of stealth. Hiring software, mechanical, electrical, manufacturing. Posted by a16z New Media.

United States@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

Flyby Robotics

Build the aerial intelligence platform in person in LA. Full stack (React/TypeScript/Go/Python), Android (Kotlin/Compose), senior mechanical and senior hardware (PCB/firmware). US citizen or permanent resident.

Los Angeles, CA@mickyabir

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_