Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Founding Software Engineer

Onton

Our mission at Onton is to help people make decisions they love, instantly. We're tackling the most economically impactful decisions first: the average shopping journey takes 79 days, and we're taking that to less than 1. Since our public launch in late 2023, we've grown exponentially to guide millions of users to their perfect product.

We recently built the foundation of a neurosymbolic AI agent that learns more about the world on every search. You have the chance to solve equally difficult problems as you scale Onton 10x over the next few months to serve 1B+ searches/year, which is just the beginning.
You have the opportunity to:
  • Join Onton as a Founding Engineer and set the foundation for our Engineering Team
  • Design, scope, implement, and deploy user-critical features.
  • Work with a dynamic team of other engineers, AI researchers, and product designers tackling cutting-edge problems to create a seamless, cohesive experience for users.
  • Build across every layer of the stack - web app, container, infrastructure, etc.
  • Stay up-to-date on the latest technologies and techniques to continually enhance our system, yourself, and the rest of the team.
We expect you to:
  • Have 3+ years of relevant engineering experience, preferably in fast-scaling companies.
  • Be a self-directed generalist, capable of picking up any engineering problem and solving it, no matter how tedious.
  • Quickly and iteratively ship code that is correct, robust, scalable, and maintainable. We love elegant code, but we're not optimizing for that. We take pride in the excellence of the product we build.
  • Exercise exceptional communication and interpersonal skills.
Interesting problems we've worked on recently:
  • Creating our own proprietary graph engine from scratch, which ended up being 700x faster on natural language queries than RedisGraph (a SOTA graph database which outperforms competitors by up to 15,000x on some benchmarks).
  • Enabling a user to combine text and image queries - for instance, they could upload an image of a blue couch and say "like this, but in green". To do this, we made our neurosymbolic search engine multimodal.
  • Automatically making logical sense of a subset of natural language via statistical and symbolic parsing techniques.
  • Fine-tuning an ensemble of ML models to perform object detection on diffusion-model-generated images.
  • Building out a performant and scalable inference engine to support more powerful and nuanced natural language queries from our users.
We'd love it if you:
  • Enjoy giving high-level abstractions low-level performance.
  • Have functional programming experience. If not, no problem; motivated engineers learn it quickly.
  • Have worked with NLP and ML models before and understand their capabilities and limitations.
Onsite Interviews

Our final round of interviews is conducted onsite at our SF office, and this role requires full-time, in-person collaboration. We believe that the best work happens when our team is together, fostering creativity, spontaneous collaboration, and strong relationships.

If you're unable to attend the interviews onsite or work onsite full-time, this position may not be the right fit. We want to ensure all candidates have a clear understanding of our work environment before applying, so everyone's time is respected throughout the process.
Location

Our team works in hybrid, 3 days a week, in our new office in San Francisco (Jackson Square). We're offering relocation compensation as we build density in this area.

We have a tenure system where, after a year, any team member can transition to a fully remote, provided they operate primarily on Pacific Time.

Diversity, Equity, Inclusion, and Belonging Statement

We hire talented and passionate people from diverse backgrounds to ensure our global workforce reflects our customers. Even if your experience doesn't perfectly match every requirement in the job description, we encourage you to apply. If you're a builder at heart who shares our values and is passionate about making software tools accessible to all, we want to hear from you.

Onton is proud to be an equal opportunity employer. We do not discriminate in hiring or employment decisions based on race, color, religion, national origin, age, sex (including pregnancy, childbirth, or related medical conditions), marital status, ancestry, physical or mental disability, genetic information, veteran status, gender identity or expression, sexual orientation, or other legally protected characteristics. We consider qualified applicants with criminal histories, consistent with applicable federal, state, and local laws. We are also committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans during our application process. If you need assistance or an accommodation due to a disability, please contact your recruiter.
Vacancy posted 10 hours ago
Similar jobs that could be interesting for youBased on the Founding Software Engineer in San Francisco, CA vacancy
  •  ...Founding Software Engineer - TruTec About TruTec TruTec is an AI-powered construction takeoff platform that is revolutionizing a $17 billion industry . We automate the tedious, manual process of site measurement and material estimation—turning hours or days of... 
    Suggested
    For contractors
    Internship

    pear.ai

    San Francisco, CA
    2 days ago
  • $160k - $210k

     ...Founding Engineer Opportunity A small, early-stage healthcare AI company in San Francisco is hiring one of its first dedicated engineers. The team is building an AI-native platform that helps pediatric therapists run their own practices - automating insurance credentialing... 
    Suggested
    Relocation

    Strategic Employment

    San Francisco, CA
    4 days ago
  • $120k - $160k

     ...Full-Stack Founding Engineer We're looking for a full-stack founding engineer to help build Airweave's product layer that connects AI to user data. At Airweave, you'll work across the entire system: from the search pipelines that power AI agents, to the sync infrastructure... 
    Suggested

    Airweave (yc X25)

    San Francisco, CA
    2 days ago
  •  ...Founding Software Engineer As a Founding Software Engineer, you'll have end-to-end ownership over projects pushing the frontier of AI evaluation. This isn't a narrow role. One week you might prototype a new RL environment from a research paper, the next you'll deploy... 
    Suggested
    Work at office
    Visa sponsorship

    RainesDev

    San Francisco, CA
    2 days ago
  •  ...Founding Software Engineer Focused On Spatial Systems SubHub is building software that turns construction plans into trustworthy, estimator-ready quantities. We focus on solving real geometry and spatial reasoning problems that sit at the core of construction workflows... 
    Suggested

    Rethink recruit

    San Francisco, CA
    2 days ago
  • $120k - $210k

     ...About Glass Health Glass Health was physician co-founded because we believe that technology should be fully leveraged to optimize the...  ...About the role: We’re looking for experienced, problem-solving engineers across the stack (Product, Full-Stack, Backend, Applied AI/LLM)... 
    Work at office
    Remote work
    Work from home
    Worldwide
    Flexible hours
    2 days per week

    GrabJobs

    San Francisco, CA
    2 days ago
  • Rise Technical Recruitment Limited is seeking a Founding Senior Software Engineer in San Francisco. This role offers a unique opportunity to work with a fast-growing YC-backed startup focused on disrupting a massive industry using AI. Responsibilities include building AI... 

    Rise Technical Recruitment Limited

    San Francisco, CA
    4 days ago
  •  ...pioneering aviation technology company in San Francisco seeks a founding engineer to build and scale their innovative AI platform for aviation...  ...and military operators. Applicants should have significant software engineering experience, particularly in cloud infrastructure... 

    Flynavi

    San Francisco, CA
    4 days ago
  • Hyperscale is looking for a Founding Senior Software Engineer to build the core product infrastructure for its AI-native intelligence layer in San Francisco. This role involves engineering across the stack, from backend systems to customer-facing features, while solving... 
    Full time

    Hyperscale

    San Francisco, CA
    3 days ago
  • A leading tech recruiting firm in San Francisco is seeking a Founding Software Engineer for an early-stage AI & LLM startup. You will contribute to innovative technology development using Python and web frameworks like Django. The ideal candidate should have over 3 years... 

    HMBL

    San Francisco, CA
    2 days ago
  • $120k - $160k

     ...Founding Engineer For Airweave's Data And Infrastructure We're looking for a founding engineer to own Airweave's data and infrastructure layer, the systems that make our distributed search and data pipelines scalable, reliable and observable. At Airweave, you'll... 

    Airweave (yc X25)

    San Francisco, CA
    2 days ago
  • $160k - $210k

     ...Everything is handled — launch support, insurance, marketing, and software — so therapists can focus on what they do best: helping kids...  ...in the right place. Role Overview The company is hiring a Founding Engineer (Full‑Stack) to work in‑person, 5 days/week, in San... 
    Private practice
    Work at office
    Visa sponsorship
    Relocation package

    Rockstar

    San Francisco, CA
    3 days ago
  •  ...the platform that makes that happen. About the role This is a founding engineering role. You'll own entire systems end to end — the backend and...  ...to AI/ML to frontend. About you 5+ years of professional software engineering experience, with a track record of designing, building... 
    Live in

    Flynavi

    San Francisco, CA
    4 days ago
  •  ...many fronts and it's time to go faster. Role Description As a founding engineer, you won’t just write code — you’ll help shape product,...  ...technical stack, direction, and vision. This is a full-time Software Engineering role. The current team is in San Francisco, and... 
    Full time

    Kalos AI

    San Francisco, CA
    2 days ago
  • $160k - $300k

     ...technology, Lance agents integrate seamlessly with existing hotel software to make real-time decisions and efficiently manage complex...  .... Role Description This is a full-time on-site role for a Founding Engineer based in San Francisco, CA. The Founding Engineer will be... 
    Full time

    Lance

    San Francisco, CA
    2 days ago
  •  ...mainframe logic written decades ago. The engineers who built it are retiring and the...  ...to some of the most critical enterprise software in the world. Learn why we're excited about...  ...systems from first principles. This is a founding role with meaningful ownership over architecture... 
    H1b
    Visa sponsorship
    Work visa
    Relocation package

    Hypercubic

    San Francisco, CA
    4 days ago
  •  ...support an ever-expanding range of physical work. Founded in San Francisco, Kovari is obsessed with rapid iteration, engineering rigor, and deploying real machines into real...  ...About This Role We're looking for a founding software engineer to help build the software... 
    Remote work

    Kovari

    San Francisco, CA
    10 hours ago
  •  ...in production. Our founder Obaid Khan co-founded Motive — scaled it to $350M+ in revenue...  ...problem. You'll work on all three. Set the engineering bar. Early team decisions compound —...  ...Looking For 5+ years shipping production software, with meaningful full-stack range (you've... 

    Runbook

    San Francisco, CA
    1 day ago
  • Founding Senior Software Engineer (SF In-Person Preferred) About Hyperscale Hyperscale is building the AI-native intelligence layer for physical operations - starting with trucking carriers. We're a team of ex-Samsara engineers and fleet operators automating the highest... 
    Work at office

    Hyperscale

    San Francisco, CA
    4 days ago
  • $170k - $225k

     ...Founding Software Engineer | AI for Supply Chain Automation Location: San Francisco, CA (On-site) Salary: $170K - $225K base + Equity Based in San Francisco, we're building intelligent software that's transforming how the global supply chain operates-starting... 

    Together for Talent

    San Francisco, CA
    1 day ago
  •  ...Fullstack Engineer We're looking for a fullstack engineer to own massive slices of our product surface: from low-latency video ingest to the interfaces officers use to review evidence and approve auto-generated reports. You'll work shoulder-to-shoulder with the founders... 

    Code Four (YC X25)

    San Francisco, CA
    1 day ago
  • $130k - $200k

     ...Software Engineer, Agent Delivery (Founding Team) Title of Role: Software Engineer, Agent Delivery (Founding Team) Location: San Francisco, onsite Company Stage of Funding: Series B - Logistics, AI, Enterprise, B2B Office Type: Onsite Salary: $130K-$... 
    Work at office

    Recruiting from Scratch

    San Francisco, CA
    2 days ago
  •  ...Our background Letta is a company founded around the MemGPT project (13k+ GitHub stars...  ...currently hiring a founding team of exceptional engineers to join us in building the next...  ...applications, not just demo notebooks. As a Software Engineer , you will bridge the gap... 
    Full time
    Live in
    Currently hiring
    Work at office

    Letta

    San Francisco, CA
    7 hours ago
  • A technology startup in San Francisco is seeking a Founding Engineer to build critical user features and work with a dynamic team. Ideal candidates should have over 3 years of engineering experience, demonstrate excellent problem-solving skills, and possess strong communication... 

    Onton

    San Francisco, CA
    2 days ago
  • A tech startup in AI is seeking a Founding Engineer in San Francisco to set the strategic foundation for the Engineering Team. Responsibilities include designing user-critical features and collaborating with engineers and researchers. Ideal candidates should have 8+ years... 

    Onton

    San Francisco, CA
    2 days ago
  • Kovari in San Francisco is seeking a founding software engineer to build the software infrastructure for their robots. This generalist role involves developing the core software stack that runs on their robots, writing code for hardware interfacing, and collaborating across... 

    Kovari

    San Francisco, CA
    10 hours ago
  •  ...last decade digitizing: adding sensors, software, and dashboards everywhere. Yet most...  ...Website: Founders Takt was founded by Adhitya Raghavan (CEO) and Will Zunker...  ...to Princeton (Mechanical & Aerospace Engineering), Harvard (MBA, Baker Scholar), and Bain... 
    Temporary work
    Relocation

    pear.ai

    San Francisco, CA
    2 days ago
  • $150k - $250k

     ...talent firm that focuses on placing the best product managers, software, and hardware talent at innovative companies. Our team is...  ...the United States to help them hire. Title of Role: Founding Fullstack Engineer Location: San Francisco, CA (On-site, 6 days/week)... 
    Work at office
    Remote work
    Relocation
    Visa sponsorship
    Relocation package

    Recruiting from Scratch

    San Francisco, CA
    10 hours 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... 

    Weekday AI

    San Francisco, CA
    2 days ago
  • $160k - $220k

     ...About the job Founding Full-Stack Engineer Founding Full-Stack Product Engineer (AI-Native) On-Site | San Francisco | Full-Time $...  ...think clearly, and believe AI-native development changes how software should be built - keep reading. What Youll Own... 
    Full time
    H1b

    Transparent Search Group

    San Francisco, CA
    10 hours ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Founding Software Engineer. Be the first to apply!