Founding Front End Engineer
Mage Legal
The Role You’ll build the interfaces our customers interact with across Mage Legal’s AI-native platform. This is a true founding engineering role—you’ll make architectural and implementation decisions that shape how attorneys and deal teams experience the product for years to come. The focus is on clarity, speed, and trust in high-stakes legal workflows. What You’ll Do Own multiple frontend architectures and codebases, making key decisions around frameworks, patterns, performance, and maintainability. Work closely with the founding team to translate real customer needs into product features and usable workflows. Take partially complete or “vibe‑coded” frontends and harden them into production‑ready, reliable interfaces. Rapidly prototype and iterate on frontend ideas to test workflows, UX patterns, and new product concepts. Partner with backend and AI engineering to ensure frontend experiences accurately reflect system behavior and outputs. What We’re Looking For Strong experience with TypeScript. Solid React experience and familiarity with modern frontend tooling. Comfortable working with LLM‑powered systems and AI‑driven products. Ability to work in person from our San Francisco (SoMa) office. This role is based in person in San Francisco, CA (not remote). #J-18808-Ljbffr Mage Legal
- TL;DR: As a Founding Front End Engineer at Parahelp, you’ll focus on building fast, reliable, and intuitive user interfaces for the Parahelp Assistant - the interface for managing the Parahelp Agent. You’ll work closely with our designer, translate product ideas into polished...Suggested
- RST Recruitment is seeking frontend engineers in San Francisco, California. This role emphasizes growth and learning, offering an opportunity to be a founding engineer and shape the company through strategic decisions. Ideal candidates will have 0-5 years of experience...Suggested
- A growing technology startup is seeking a Founding Full-Stack Engineer (React + Supabase) to build and deploy core product features. This is a remote-first role where you'll work closely with the founder, ensuring the overall architecture, performance, and scalability...SuggestedRemote work
- A leading company in the AI sector is seeking a Founding Frontend Engineer to join their innovative team in San Francisco. This role involves crafting high-performing web applications and collaborating across teams to deliver impactful solutions. Ideal candidates will...Suggested
$175k - $225k
Founding Full-Stack Software Engineer (React / Node.js / NestJS / PostgreSQL) Carma Technologies, Inc. Base pay range: $175,000.00/yr - $225,000.00/yr... ...The Role Full-Stack Engineer to own key product features end-to-end across React, NestJS, PostgreSQL, Prisma ORM, and...SuggestedFull timeWork at officeRemote work- Job Openings Lead Founding Backend Engineer (Node, Python, React, AI/ML) - Startup Experience About the job Lead Founding Backend Engineer (Node,... ...: autonomous, resourceful, and able to own complex projects end-to-end. Willing and excited to work onsite in San Francisco...
- ...Experience: 2–8 years Stage: Seed to Series B Role Type: Early hire / founding engineer Why This Role Exists You’ll help build the core product from... ...surfaces at an early‑stage company. What You’ll Do Build end-to-end product features across frontend and backend Ship...
- ...a century. Dryft is powering the next. THE ROLE As Founding Fullstack Engineer , you’ll be the brain behind Dryft’s decision intelligence... ...directly with customers daily Have shipped production code end-to-end, are strong in backend & infra and comfortable...Relocation
$120k - $250k
...Overview Founding Full-Stack Engineer role at Floot (YC S25). Base pay range is provided; your actual pay will be based on skills and experience —... ...both function + design) Build robust infrastructure for our end-to-end platform to power millions of production apps Requirements...Full time$150k - $250k
A seed-stage AI startup in San Francisco is looking for a Founding Software Engineer to build high-quality frontend features. This role involves collaborating with designers and backend engineers while taking ownership of frontend architecture. The ideal candidate should...- Casa is seeking a founding Senior Backend Engineer in San Francisco to lead the development of robust backend systems and define the culture of our engineering team. You will design and optimize APIs, ensuring scalability and reliability as we grow our member base. If...
- ...We’re looking for a seasoned backend engineer to own key data, search, AI, and core backend infrastructure projects as we rapidly evolve... ...that serve millions of users Early-stage startup experience or founding experience Side projects, papers, etc. that demonstrate a...
$200k - $250k
Overview Founding Applied AI Fullstack Engineer - FinTech Startup - $200k-$250k + Equity | San Francisco Bay Area (Hybrid) This is a ground-floor opportunity... ...Fullstack Engineer (5+ years) to shape the platform end-to-end, working closely with the leadership team. What...$130k - $200k
Member of Technical Staff, Founding Frontend Engineer Join to apply for the Member of Technical Staff, Founding Frontend Engineer role at Ocular AI (YC W24) Member of Technical Staff, Founding Frontend Engineer Join to apply for the Member of Technical Staff, Founding...Full timeWork at office$1,000 per month
...Our founders have managed multi-billion dollar endowment portfolios and founded multiple companies with 9-figure exits. The Role SF or NYC preferred (open to remote) We’re hiring a front-end engineer to own the user experience across our platform—from the web app where...Remote workVisa sponsorship- Y/n in San Francisco is seeking a founding full-stack engineer to spearhead a next-generation entertainment platform. You will own major product surfaces and build high-scale personalized recommendation systems for a rapidly growing app. Joining a small team, you will...
- A technology company in San Francisco is seeking a founding-level Solutions Engineer to drive customer value through technical expertise and strong collaboration with Sales. You'll be embedding in deals, creating impactful demos, and improving sales processes. Ideal candidates...
$50k
A dynamic AI startup in San Francisco is seeking a founding full-stack engineer to own the application layer of their platform. The role involves building user-facing dashboards, designing APIs, and leading architectural decisions. Ideal candidates will have experience...- A pioneering AI communication company is seeking a Founding Full-Stack Engineer to lead the development of a revolutionary mobile application. This hands-on role focuses on React Native and Python integration, aiming to reshape how humans communicate in group settings....
$150k
About the Role This is a founding engineering opportunity at a Y Combinator Spring 2026 consumer wearable startup operating at the intersection... ...Full-Stack iOS Engineer, you will own the companion iOS app end-to-end — the primary surface through which users experience and...Remote work$120k - $250k
A leading technology startup based in San Francisco is seeking a Founding Full-Stack Engineer to collaborate closely with the founders in developing the product. This role requires strong experience in React, TypeScript, and Node.js. The position offers a competitive salary...- A leading AI infrastructure firm in San Francisco is seeking a Founding Forward Deployed Engineer to work directly with customers to implement their product. This role requires technical depth, strong communication skills, and curiosity to understand customer technology...
$240k - $310k
Albert Bow in San Francisco is seeking a Founding Engineer to join their innovative AI startup. This critical role offers an impressive salary range of $240,000 - $310,000 as you will be pivotal in architecting backend infrastructure and driving product decisions. Ideal...- A technology startup is looking for a Founding AI Full Stack Engineer to work on innovative AI-driven solutions. This permanent, full-time position is ideal for someone eager to leverage their entrepreneurial skills in a startup environment. Responsibilities include designing...Remote jobPermanent employmentFull time
- An innovative startup seeks a founding engineer to lead backend development for a groundbreaking code generation tool. This role offers the opportunity to make a significant impact from day one, as you build a system that enhances creativity in software design. You will...
- A fast-growing tech company in San Francisco is seeking a Founding Account Executive. The role requires working closely with customers, demonstrating product capabilities, and integrating solutions. Ideal candidates have 3 to 6 years of experience with enterprise customers...
$175k - $195k
The Electric Plant Co in San Francisco is seeking a Founding Software Engineer to lead the software platform development. This role involves building and maintaining backend systems that integrate our IoT hardware with AI capabilities, focusing on creating reliable and...- As a Founding Solutions Engineer at Rippletide, you will be the critical bridge between our platform and... ...tooling, and culture. What You'll Do Lead end-to-end technical engagements with... ...your foundational impact on the team. A front-row seat to enterprise AI adoption —...
- Join to apply for the Founding Solutions Engineer role at Vori 6 days ago Be among the first 25 applicants Join to apply for the Founding Solutions... ...at Vori. Responsibilities Understand the VoriOS system end to end and interdependencies between the system and its integration...Full timeLocal area
- ...About You 7+ years of experience as a Customer Facing Solutions Engineer Crafting Custom Software Demos and PoCs for Enterprise... ...Solutions Engineer, Help Establish the Playbooks Working Closely with the Founding Director of Sales #J-18808-Ljbffr Walter Bacon, Inc.
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Founding Front End Engineer. Be the first to apply!
- senior front-end developer San Francisco, CA
- front end developer full time San Francisco, CA
- junior front end developer remote San Francisco, CA
- front end web developer San Francisco, CA
- frontend engineer San Francisco, CA
- front end web developer part time San Francisco, CA
- front end javascript engineer San Francisco, CA
- senior frontend developer San Francisco, CA
- remote frontend developer San Francisco, CA
- entry level front end web developer San Francisco, CA

