Founding Full Stack Engineer (Frontend + UX Focus) (Santa Rosa)HartleyCo • Santa Rosa, CA, United States
Founding Full Stack Engineer (Frontend + UX Focus) (Santa Rosa)
HartleyCo • Santa Rosa, CA, United States
[job_card.variable_days_ago]
[job_preview.job_type]
- [job_card.full_time]
[job_card.job_description]Strong front end engineering with sharp product taste. Someone who cares about clean UI, clear UX flows, and fast interactions. Ability to work full stack when needed, but happiest owning the product surface. Comfortable working on-site with founders, shipping quickly, and iterating with customers. Opinionated about design details and code quality. Experience with React, TypeScript, Next.js, Tailwind. Exposure to AI / voice tooling a bonus, not required. Prior early-stage or YC / VC-backed startup experience. Examples of beautiful or highly polished UI youve built.
Founding Full Stack Engineer (Frontend + UX Focus)
Location : San Francisco (on-site)
Were helping a YC-backed, seed-stage startup hire a Founding Engineer who can take full ownership of the products look, feel, and overall experience. The company builds the simulation and evaluation layer for voice and text AI agents, used by both fast-growing startups and large enterprises.
This role is full stack, but the centre of gravity is very much the frontend. Youll be the person who makes a complex AI platform feel simple, fast, and genuinely enjoyable to use.
What Youll Own
- End-to-end ownership of core UI : dashboards, debugging tools, evaluation workflows.
- Turning rough ideas into product : sketching, prototyping and shipping quickly.
- Driving UX quality across the product : layout, interaction, states, polish.
- Building intuitive interfaces over real-time systems, large datasets, and AI outputs.
- Dipping into the backend (Python / FastAPI, Supabase, AWS) to unblock yourself and shape APIs.
What Theyre Looking For
Nice-to-Haves
If you want to define the visual and interactive identity of a high-velocity AI product and sit at the heart of a tiny founding team, this is the one.
[job_alerts.create_a_job]
Founding Engineer • Santa Rosa, CA, United States
[internal_linking.similar_jobs]
Forward Deployed Engineer (AI Infrastructure).San Francisco, CA Onsite (6 days / week).Are you an engineer who loves solving complex, real-world problems directly with customers? Do you want to work...[show_more]
Senior Full-Stack Engineer High-Growth AI SaaS Startup.SoMa, San Francisco, CA | 💼 Full-Time | Onsite.Salary : $200K$325K + Meaningful Equity (1%+).
Join an early-stage AI SaaS startup building an....[show_more]
Senior Frontend Developer / Mobile Lead.Love greenfield mobile app development?.Were hiring our first Mobile & Frontend Lead to architect and launch a brand-new cross-platform mobile app while leve...[show_more]
We are seeking versatile Sr Software Engineers who specialize across disciplines - Machine Learning, Data Engineering, and Full-Stack Development.
The ideal candidate is willing to get their hands d...[show_more]
A Product Engineer in this role will focus on building and scaling a high-quality AI agent product with strong UX, fullstack development, and close user collaboration, and should bring 2+ years of ...[show_more]
Senior Software Engineer (Full-Stack).San Francisco (Hybrid, 2 days / week).Our client is a Series A start up, growing quickly as they onboard new customers and scale platform, using AI to remake the...[show_more]
Were supporting a major global financial technology organization thats making significant investments in AI innovation.Theyre scaling their engineering teams across North America to drive developme...[show_more]
Were seeking a Full Stack Software Engineer with strong backend development skills in Python and frontend expertise in React.
Youll help design, implement, and scale full stack web applications that...[show_more]
Founding Engineer - Applied AI.AI startup tackling a $100bn+ per year inefficiency in the physical world.Fresh off an 8 oversubscribed Seed round - with investors including Palantir and OpenAI - th...[show_more]
Highly respected practice, with three endocrinologists and one NP.Full-time position is 36 patient-facing hours per week.
Primary responsibilities include outpatient with some inpatient responsibili...[show_more]
As part of Harrison Clarke Ventures mission to help exceptional founders scale from Seed through Series B, were looking to connect with software engineers who love building real products and taking...[show_more]
Were Hiring : Frontend Software Engineer Chalk.This is an excellent opportunity for engineers who love modern JavaScript ecosystems, frontend architecture, and cross-functional collaboration across...[show_more]
Senior Full Stack Engineer - Backend Focus / Security / Node (Hybrid).A Senior Engineer is required to join an exciting early-stage startup in the San Francisco East Bay.
This is a high-impact oppor...[show_more]
Please read in full : As a founding engineer, youll work across our entire stack to build and scale our contextual advertising network for AI tools.
Youll have significant influence over technical di...[show_more]
A company is looking for an Engineering Lead, Front-End Focused.Key Responsibilities Lead a team of software engineers in full-stack product development Collaborate with product management to de...[show_more]
Software Engineer AI & Full Stack (San Francisco, CA).Full-Time | 🧠 14+ Years Experience | 💰 $150,000- 210,000.Were building self-improving software AI that continuously creates, tests, and enh...[show_more]
Do you want to help define the future of precise location and build the platforms that power next generation autonomy?.Location : San Francisco (Hybrid).
Salary : $200k - $220k + Equity.This is a well...[show_more]
DevOps with GitHub Co-Pilot exp.Direct Client : Semiconductor Manufacturing Company.Location : Santa Clara, CA on-site.Candidates need to be senior level with co-pilot experience.DevOps roles with a ...[show_more]
Forward Deployed Engineer (Santa Rosa)
Rise Technical • Santa Rosa, CA, US
[job_card.part_time]
[last_updated.last_updated_variable_days] • [promoted]
Senior Full Stack Engineer (Product) - AI Workflow / Application Builder (Santa Rosa)
Ikuto • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Senior Frontend Developer / Mobile Lead (React + Cross-Platform) (Santa Rosa)
UpRecruit • Santa Rosa, CA, US
[job_card.full_time] +1
[last_updated.last_updated_variable_days] • [promoted]
Senior Software Engineer (Santa Rosa)
Premier Group • Santa Rosa, CA, US
[job_card.part_time]
[last_updated.last_updated_variable_days] • [promoted]
Founding Product Engineer (Santa Rosa)
Brahma Consulting Group • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Senior Software Engineer (Santa Rosa)
Key Talent Solutions • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Lead Generative AI Engineer (Santa Rosa)
Madison-Davis, LLC • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Full Stack Software Engineer (Python / React) (Santa Rosa)
Arrayo • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Founding Engineer - Applied AI (Santa Rosa)
Strativ Group • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Endocrinology Opening | San Francisco Bay Area
MarinHealth • Greenbrae, US
[job_card.full_time]
[last_updated.last_updated_30] • [promoted]
Senior Full-Stack Engineer (Multiple Opportunities) (Santa Rosa)
Harrison Clarke Ventures • Santa Rosa, CA, US
[job_card.part_time]
[last_updated.last_updated_variable_days] • [promoted]
Frontend Developer (Santa Rosa)
hackajob • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_1_day] • [promoted]
Senior Full Stack Engineer - Backend Focus / Security / Node (Hybrid) (Santa Rosa)
Attis • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Founding Engineer (Santa Rosa)
trygravity.ai • Santa Rosa, CA, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Engineering Lead, Front-End
VirtualVocations • Santa Rosa, California, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Software Engineer (Santa Rosa)
Acceler8 Talent • Santa Rosa, CA, US
[job_card.full_time] +1
[last_updated.last_updated_variable_days] • [promoted]
Full Stack Engineer (Santa Rosa)
Trust In SODA • Santa Rosa, CA, US
[job_card.part_time]
[last_updated.last_updated_variable_days] • [promoted]
DevOps Engineer (Santa Rosa)
TRUGlobal • Santa Rosa, CA, US
[job_card.part_time]
[last_updated.last_updated_variable_days] • [promoted]