Founding Full-Stack Engineer
$180k - $250kFull-time
True Talent Solutions Partners
About the Role
Join a small engineering team building agentic systems for an AI-native legal services business. In this founding-level role, you will work across the stack to deliver reliable tools used by lawyers in their daily work.
What You'll Do
Build and improve agentic systems, including agent harnesses, evaluations, and user interfaces designed for reliable legal workflows.
Ship full-stack features from database to UI, including client-facing products, lawyer workspaces, review queues, document comparison tools, agent chat, and operations dashboards.
Develop integrations with messaging, email, document, e-signature, and billing platforms.
Improve observability, evaluations, and infrastructure to support trustworthy agents at scale.
Work directly with lawyers to scope problems, deliver solutions, and incorporate feedback.
What We're Looking For
Three to seven years of full-stack engineering experience, including maintaining and evolving production SaaS applications beyond the prototype stage.
Strong experience with TypeScript, React, Next.js, tRPC, Node.js, PostgreSQL, AWS, and Temporal.
Experience building and deploying production agentic systems across interfaces, integrations, and agent infrastructure.
Ability to review and maintain technical control over AI-generated code.
Experience in high-growth, venture-backed environments and working directly with users to define technical solutions.
A STEM or computer science degree and strong engineering fundamentals.
Legal technology or other regulated-industry experience, plus backend observability experience, is helpful.
Must be authorized to work in the United States without sponsorship.
Compensation & Benefits
Base salary is $180,000 to $250,000 annually, with equity of 0.1% to 0.6%. Visa sponsorship is not available.
Location
On-site in San Francisco, United States.
Vacancy posted 1 day ago
Similar jobs that could be interesting for youBased on the Founding Full-Stack Engineer in San Francisco, CA vacancy
$180k - $250k
...at innovative companies. Our team is 100% remote and we work with teams across the United States to help them hire. Founding Full-Stack Engineer Location San Francisco, CA Fully onsite, 5 days per week. Company Stage of Funding Early-Stage / High...SuggestedFull timeWork at officeImmediate startRemote workRelocation packageShift workRecruiting from Scratch
San Francisco, CA3 days ago- ...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...Suggested
Weekday
San Francisco, CAa month ago $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 workClera
San Francisco, CAa month ago$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...SuggestedLocal areaRelocationClera
San Francisco, CAa month ago- ...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...SuggestedFull time
MaxIT Consulting - Max Corporate Group
San Francisco, CA7 days ago $180k - $250k
...anonymous AI-native law firm building agentic systems for legal services. We’re identifying a small number of exceptional founding full-stack engineers from our network. If there’s a strong fit, we’ll introduce you directly to the founding team. Compensation: $180K-$250K...Full timeImmediate start$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...Full timeH1bWork at officeVisa sponsorshipMonday to FridayPeople Hive HR Consultancies LLC
San Francisco, CA9 days ago- ...and security. Several design partners today and a founding team of three. Full-Time, In-person, San Francisco, CA. Experience: 4+... ...Role: This is a backend- and systems-heavy founding engineering role where "full-stack" means owning the product and system end to end. You...Full timeH1bVisa sponsorship
Thomas Talent Network
San Francisco, CA6 days ago - 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...
MoTek Technologies
San Francisco, CA3 days ago $180k - $240k
...updates to devices in the field. Shape product architecture and engineering practices as the team grows. Investigate and resolve... ...data systems, and a user-facing web or mobile client. Strong full-stack skills and the ability to make sound architectural decisions...Full timeVisa sponsorship$160k - $200k
...Job Description Comity is looking for a Full Stack Developer to contribute both to our... ...admin portal. You will work with our engineering team to design, develop, test, and deploy... ...and team culture. ~ Funding $4.6M ~ Founded 2018 ~ Salary: $160k - $200k ~100% US...Work at officeRemote workHired Recruiters
San Francisco, CA6 days ago$130k - $200k
...Work directly with leadership on high-priority product and infrastructure needs. Requirements At least 5 years of full-stack engineering experience, including shipping consumer products to production. Strong proficiency in TypeScript and React, with production...Full timeClera
San Francisco, CA10 days ago$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...Remote workFlexible hours- ...the scale of Palantir or ServiceNow—serving the largest healthcare enterprises.Experienced founding team: Built by exited founders, YC & MIT alum, ex-Tesla, ex-Google engineers.Hypergrowth with stability: We went from initial idea to 7+ figure customer contracts in just...Live inNight shift
Neon | Ai-powered Patient Access
San Francisco, CA5 days ago $150k - $205k
...best work.We're growing fast. Since our founding in 2019, we've grown to 90,000+ customers... ...work.About the roleAs a Senior Fullstack Engineer, you'll own a product area end to end, from... ...requirements vary by location. All full-time employees receive equity in Scribe....Full timeTemporary workWork at officeHome officeFlexible hoursScribe
San Francisco, CA4 days ago- ...InformationDate Opened 10/07/2025Job Type: Full timeIndustry: TechnologyWork Experience:... ...new features. Collaborate with frontend engineers to design and implement RESTful APIs and... ...scratch Previous experience as a founder or founding engineer is highly preferred. Hard skills...Contract workWork experience placementWork at officeImmediate start
RainesDev
San Francisco, CA18 hours ago $148.5k - $223.9k
.../ On-SiteRole Level: Software Engineering Senior MTSTeam: Infrastructure... ...you will ensure our monitoring stack is invisible, resilient, and... ...OperationsDeploy and manage the full monitoring stack within highly... ...about company benefits can be found at the following link: to the...Full timeSalesforce
San Francisco, CA3 days ago$200k - $300k
...traffic grows every week. This is a hands-on engineering role. You’ll design it, build it, run it... ..., and own everything you ship. You want founding-team scope. You’ll set the backend bar... ...equity, 401(k), and health insurance. Full-time, in person in San Francisco, CA. We...Full timePally (YC S25)
San Francisco, CA18 hours ago$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 areaWorldwideAdobe Systems
San Francisco, CA1 day ago- ...candidate profiles across active roles and use resumes/profiles to understand which backgrounds may be a fit. THE ROLE As a Founding Backend Engineer, you may work on projects that require strong execution, communication, analytical judgment, and the ability to move...
Career-Launch.net
San Francisco, CA2 days ago - ...We are hiring a Founding Software Engineer in San Francisco. We are building a small, talent-dense team... ...expected to operate proactively, take full ownership, and independently drive systems... ..., you will own the entire technical stack end-to-end, from core infrastructure...
Unsiloed AI
San Francisco, CA3 days ago - ...Arphie Engineering Opportunity Arphie is building the next generation platform... ...backed by top-tier VCs. As a founding engineer, you'll architect,... ...fundamentally shape our future technical stack. You'll have the opportunity to be truly full stack - from building out new...Full timeWork at office3 days per week
Arphie
San Francisco, CA3 days ago $120k - $150k
...Full Stack Engineer: We are in search of a dynamic Full-Stack Engineer to work as part of our product and backend engineering initiatives... ..., and enabling users to take ownership of their creations. Founded by seasoned industry veterans and serial entrepreneurs with...Casual workWork at officeFlexible hoursErth.AI Inc.
San Francisco, CA4 days ago$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- ...approval, and drives systems it was never given an API for. About the Role: This is a backend- and systems-heavy founding engineering role where "full-stack" means owning the product and system end-to-end. You'll build the workflow engine for long-running human and...Full timeH1bWork at officeVisa sponsorshipMonday to Friday
$225k - $275k
...About the Role Join an early-stage AI video team as a founding backend engineer, shaping the systems behind its video generation and creative technology. You will serve as a technical lead, setting a high bar for engineering quality and helping guide the team's technical...Full time$176k - $242k
...them until they work at scale. We are roboticists, engineers, operators, and builders. We believe the next great technology... ..., join us. What you'll do We're seeking a Full Stack Engineer to join our founding team who will design and build critical software...Full timeWork at officeFlexible hoursATOMS Careers page
San Francisco, CA6 days ago$225k - $275k
...About the Role Join a small, high-caliber team building AI-powered video technology. As a founding backend engineer, you will lead the design of core systems and set a high bar for technical quality as the product and engineering team grow. What You'll Do Design...Full time$200k - $300k
...About the Role Own the backend systems behind an AI assistant that communicates through text, email, and phone. As a hands-on founding engineer, you will design, build, and operate reliable infrastructure for message delivery, long-running agent tasks, and scheduled...Immediate startClera
San Francisco, CA7 days ago$200k - $250k
...Job Description San Francisco, CA · On-site · Full-time Compensation: $200,000–$250,000 + equity... ...fast. We're partnering with them to find a full-stack engineer who wants real ownership at an early stage. Founded 2025 · Small team · Industry: AI, Ecommerce, B2B...Full timeH1bRelocationVisa sponsorshipRelocation packageDavid Joseph & Company
San Francisco, CAa month ago
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Founding Full-Stack Engineer. Be the first to apply!
Related searches
- junior full-stack web developer San Francisco, CA
- full stack cloud developer San Francisco, CA
- full stack engineer San Francisco, CA
- mid level full stack developer San Francisco, CA
- senior full stack web developer San Francisco, CA
- senior java full-stack developer San Francisco, CA
- full time engineer San Francisco, CA
- full stack developer San Francisco, CA
- entry level full stack developer San Francisco, CA
- remote .net full stack web developer San Francisco, CA