Founding Full-Stack Engineer
Weekday
Job DescriptionJob DescriptionThis role is for one of our clients Location: San Francisco (On-sit) Experience: 2–8 years Stage: Seed → Series B Role Type: Early hire / founding engineer Why This Role Exists You’ll help build the core product from the ground up. This is a hands-on role for someone who loves shipping, thrives in ambiguity, and wants ownership over major product surfaces at an early-stage company. What You’ll Do Build end-to-end product features across frontend and backend Ship quickly in 0→1 environments Design APIs, schemas, and workflows Partner closely with founders, product, and design Improve reliability, performance, and developer experience Establish engineering best practices Use modern AI developer tools to move faster (LLM copilots, agent workflows, testing automation) What We’re Looking For Strong TypeScript, React, and Node.js Experience shipping production web products Startup or founding-engineer background (or equivalent) Product-minded builder with high ownership Comfortable working independently in small teams Nice to Have Next.js Postgres / Redis AWS / GCP Experience integrating LLM APIs or AI tooling Docker & CI/CD Active GitHub presence We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
$150k - $190k
...Job Description Job Description About the Role An early-stage startup is hiring a Founding Full Stack Engineer to help build its product from the ground up. This role will work closely with the founding team to design, develop, and ship the initial versions of the...SuggestedRemote workFlexible hours$200k - $300k
...is supporting an early-stage AI infrastructure client in San Francisco in the search for a highly skilled Senior/Staff Founding Full-Stack Engineer Agent Systems. The successful candidate will join the companys early-stage team and help build complex systems from the...SuggestedFull timeH1bWork at officeVisa sponsorshipMonday to Friday- ...Visa sponsorship: H-1B, O-1, OPT Employment type: Full-time Work type: In person Benefits & Perks Meals... ...About This Role This is a backend- and systems-heavy founding engineering role where “full-stack” means owning the product and system end to end. The...SuggestedFull timeH1bWork at officeVisa sponsorship
- ...0% of the code we ship is written with Claude Code and Codex. Engineers here spend their time directing agents, reviewing every change... ...show us how.What We're Looking ForRequired3+ years in AI/ML or full-stack engineering, with production systems you owned from first...SuggestedWeekend work
$180k - $230k
...in the AI-powered sales automation space is hiring its first Founding Engineer. You'll join the CTO as a core member of a tiny, high-... ...There are no strict lanes here. You'll own problems across the full stack, from LLM orchestration to embeddable frontend widgets to eval...SuggestedRemote work$135k - $155k
...clinical ladder programs, evidence-based practice, and designation readiness, all in one enterprise-grade product. As a Founding Full Stack Engineer , you'll own architecture and implementation across multiple integrated products. You'll design the core infrastructure...Local areaRelocation- We want a full stack engineer to join our team as our third engineer. You are passionate to use those skills for the greater good. You are also excited to build a digital health company from the ground up.More specifically, our technology includes: - Alex, our homegrown...
- ...SF Bay Area California Fully On-site We are seeking a Founding Full-Stack Engineer Real-Time AI & Wearables to build the product and infrastructure layer around an advanced wearable AI platform used in real-world industrial environments. The Opportunity...Full time
- ...DescriptionJob DescriptionWe are hiring a Founding Software Engineer in San Francisco.We are building a... ...expected to operate proactively, take full ownership, and independently drive systems... ..., you will own the entire technical stack end-to-end, from core infrastructure...
$200k - $300k
...that communicates through text, email, and phone. As a hands-on founding engineer, you will design, operate, and improve reliable systems that... ...Equity details are not provided. Visa sponsorship is not available.Location Full-time, on-site in San Francisco, California....Full time$200k - $250k
...the fragmented legacy commerce stack. The product bundles merchant... ...as the primary interface. Founded in 2025, the company has approximately... ...join a small, product-led engineering team and own meaningful parts... ...professional experience as a full-stack software engineer.•...Full timeH1bRelocationRelocation package$150k - $270k
...Between them, Different’s founders have founded two unicorns, led AI at a global marketing... ...for that area, work with our Applied AI engineers on the agents and model systems behind it... ...only or Go-only. The work spans the whole stack and changes from week to week. What you...$180k - $280k
...enterprise customers and is looking to expand its engineering team as it scales. They're now looking for a Senior Full Stack Engineer to play a key role in building the... ...experience at an early-stage startup or as a founding engineer. ~ A combination of experience in...H1bVisa sponsorship$140k - $190k
...changing Stellar ecosystem. As a Software Engineer on the Wallets team, you will get to... ...applications across our product suite and technical stack. This includes our flagship product,... ...real time creating real world utility. Founded in 2014, the Stellar Development...Temporary workWork at officeLocal areaWorldwideFlexible hours$180k - $230k
...becomes a missed date. On one 15-project portfolio, Foresight found a project 245 days behind, cut reporting overhead by 90%, and... ...in New York. The role We're looking for a Senior Full Stack Engineer to help build the core platform and product of Foresight....For contractorsWork at office$150k - $205k
...AI agents.We're growing fast. Since our founding in 2019, we've reached 7 million users across... ...work.About the roleAs a Senior Fullstack Engineer, you'll own a product area end to end,... ...office requirements vary by location. All full-time employees receive equity in Scribe....Full timeTemporary workWork at officeRemote workHome officeFlexible hours$30k - $75k
...CTO to develop software used by top engineering executives. You'll be engineer #3.... ...Robinhood, and The Economist. The Founding Team: Our CEO has scaled engineering... ...currently run his software. Their Stack: Details: Details: Full-time role. Fully Remote. Compensation...Full timeRemote work$159.2k - $301.6k
...role is an outstanding opportunity to operate like a startup founding engineer while having the resources of an innovative, large... ...emerging creators.The ChallengeWe are looking for a Founding Full Stack Engineer to build Creator Services from the ground up. Creator...Full timeTemporary workLocal areaWorldwide- ...to transfers (OPT H1B). About this role Senior/Staff Full Stack Engineer with 10 YOE to join Mithrls engineering team: a builder excited... ...Lilly AstraZeneca and Siemens. 25 people in person in SF; founded 2023; $80M total funding (Series A led by Obvious Ventures)....Full timeInternshipH1bFlexible hours
- ...Description About this role We are looking for a Senior Full Stack Engineer with 5+ years of experience to own companys agent experience... ...whether they moved the needle Role Details Position: Founding Engineer, shifting from MTS position. Core...Work experience placementShift work
$175k - $240k
...Compensation ~ Typical base: $175K to $240K ~9 founding roles top out at $300K+. Joining early doesn't mean... ...roles include equity. Who's hiring ~53 founding engineer roles open in NYC, 37 in SF, across full stack, AI, backend and infra ~140+ startups from pre-...Live in- ...We are looking for a founding engineer who wants to build deeply technical AI systems in one of the most important and regulated industries... ...environments You might be a fit if you: Are an exceptional full-stack or backend engineer Care about building reliable, production...
$200k - $300k
...moving, early-stage startup in San Francisco is looking for a Founding Engineer to join as one of the first technical hires. This is a rare... ...gets built and how. What You'll Do Build and ship full-stack features across the product in a 0-to-1 environment Own product...Relocation- .... This is where David AI comes in. David AI was founded in 2024 by a team of former Scale AI engineers and operators. In less than a year, we’ve brought on... ...audio models. About this role As a Staff Full Stack Engineer at David AI, you’ll lead our engineering...Work at office
- ...As a Founding Engineer, you will work directly with the founders to build production-grade multi-agent systems, backend infrastructure, and... ...solutions that deliver direct value to customers Full Stack Development - Develop backend systems with a focus on scalability...
$140k - $210k
...for Space - AI Marketplace /Full time /On-siteWanna join the adventure... ...in orbit. We are hiring the founding developer of that marketplace... ...in close collaboration with engineering teams.Build connectors for... ...building and shipping full-stack products.Experience with Sprint...Full timeTemporary work$130k - $215k
...powered tools for sensitive investigative workflows. As a founding forward deployed engineer, you will work directly with law enforcement and... ...problems, including custom or non-scaled solutions. Strong full-stack skills and the ability to turn end-user needs into implemented...Immediate startRemote workVisa sponsorship- ...role You will be one of the first three engineers, and the first ones hired. This is a CTO... ...that hold up in production Full-stack / infra engineer: builds the platform,... ...founder, technical co-founder, CTO, or a founding or very early engineer at a high-growth...InternshipRelocationRelocation package
- ...internet – and Caylex will be the infrastructure powering it. The Role As a Founding Engineer, you’ll play a central role in shaping both our product and engineering culture. You will: Work full-stack across infrastructure, integrations, and user-facing product features....Full timeWork at office
$120k - $200k
...powered software, payer contracting, and full back-office infrastructure. Our goal is simple... ....Both founders are technical. Every engineer on the team has experience at early-stage... ...products from zero to scale, and one previously founded a YC-backed company.We care deeply about...Full timeStart working todayWork at office
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