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19 roles

Startups hiring: 8 October 2026

Apply on 8x careers

Build 0 → 1

Ten people or fewer. Among the first engineers.

  • Trace

    Machine Learning Engineer, Applied

    • United States
    • 2-10 people

    Trace is hiring an Applied Machine Learning Engineer in the United States to help build AI that interacts with the physical world, tackling the century‑defining challenge of bridging atoms and intelligence. The role offers a chance to shape foundational models that directly control and sense real‑world systems, a rare opportunity for engineers who want to see their algorithms move beyond simulation.

  • AgentMail (YC S25)

    Founding Product Engineer

    • San Francisco, CA
    • 2-10 people

    AgentMail is hiring a Founding Product Engineer in San Francisco to help build its developer‑first email API that gives AI agents their own inbox—essentially a Gmail for intelligent agents—offering a strong engineer the chance to shape core product infrastructure at a YC‑backed startup backed by General Catalyst and the founders of Supabase and Ramp.

  • Expand Power Technologies

    Founding Staff Mechanical Engineer

    • Berkeley, CA
    • 2-10 people

    Expand Power Technologies is hiring a founding staff mechanical engineer in Berkeley, CA to help develop its compact smart transformers—domestically manufactured devices that dramatically shorten lead times and unlock electrification in locations where it was previously impossible, offering a strong engineer the chance to shape a core hardware product from the ground up.

  • Lalaimpact

    Founding Engineer - Data Scientist

    • Lund, Skåne County, Sweden
    • 2-10 people

    Lalaimpact is looking for a founding engineer‑data scientist to help shape its AI‑powered decarbonization platform, a tool that leverages machine learning to accelerate climate‑friendly decisions. For a strong engineer, the role offers the chance to build core data pipelines and models from the ground up in a tiny, high‑impact team.

  • Manifest

    Founding Design Engineer

    • London Area, United Kingdom
    • 2-10 people

    Manifest, a small fintech product platform team in the London area, is looking for a Founding Design Engineer. The role offers a chance to shape core product architecture from the ground up alongside a tight‑knit team of 2‑10 engineers.

  • Catapult

    Founding Senior Engineer

    • London Area, United Kingdom
    • 2-10 people

    Catapult, building AI personal assistant agents that ingest and learn from every email, message, document, meeting and transcript, is hiring a Founding Senior Engineer and a Founding AI Research Engineer in the London area; the roles offer a chance to shape deeply personalized, evolving assistants alongside a small, research‑heavy team that has shipped products at Meta, taught AI at Cambridge and pioneered frontier tech from quantum random number generators to privacy‑focused coding agents.

  • grubel

    Founding Legal Engineer

    • Tübingen, Baden-Württemberg, Germany
    • 2-10 people

    Grubel, an AI specialization automation platform, is looking for a Founding Legal Engineer, Founding Research Engineer, or Research Scientist to join its small Tübingen‑based team. The company aims to automate the tedious loop of data curation, adaptation, and evaluation that currently limits AI specialization, offering engineers a chance to shape a core research‑driven product that lets every “matter” build its own, context‑aware AI.

Early team

Eleven to fifty people, still building most of it.

  • Key & Card AG - Einfach. Genial. Digital.

    Front-End Developer

    • Memphis Metropolitan Area
    • 11-50 people

    Key & Card AG, a veteran provider of modular electronic access control and self‑check‑in terminals for hotels and other venues, is looking for a Front‑End Developer in the Memphis Metropolitan Area. The role offers a chance to shape the UI of next‑generation check‑in automation that drives efficiency, cuts costs, and boosts occupancy for hospitality operators.

  • Bonnie

    AI Engineer (Agent Platform)

    • Amsterdam, North Holland, Netherlands
    • 11-50 people

    Bonnie, the AI booking and reservation host that answers calls and WhatsApp messages 24/7 for hospitality businesses, is hiring an AI Engineer (Agent Platform) in Amsterdam. Working on a platform that already powers 750+ locations across 15+ countries and integrates with systems like Zenchef, TheFork, Formitable and OpenTable, you’ll get to shape the next generation of voice‑ and chat‑based customer interactions for a fast‑growing, award‑winning service.

  • Emma - we are hiring!

    Mid Level Frontend Engineer (React/React Native)

    • Islington, England, United Kingdom
    • 11-50 people

    Emma is building a budgeting and investing app that helps users take control of their money, and they’re hiring Mid‑Level Frontend Engineers (React/React Native), Senior Frontend Engineers (React/React Native), Senior Backend Engineers (Node.js) and Mid‑Level Full‑Stack Engineers in Islington, England. The roles offer strong engineers the chance to shape a consumer‑focused financial product from both the client‑side and server‑side, working alongside a tight‑knit team of 11‑50 people.

  • Xantura Limited

    Machine Learning Engineer

    • London Area, United Kingdom
    • 11-50 people

    Xantura Limited, a London‑based public sector data analytics platform, is hiring a Machine Learning Engineer to help turn disparate council data into actionable, ethical insights that enable officials to prevent problems before they arise. The role offers a chance to apply cutting‑edge ML to real‑world social impact, shaping decisions that affect families and communities at scale.

  • Capsa AI

    Senior / Staff AI Engineer

    • London Area, United Kingdom
    • 11-50 people

    Capsa AI, the AI operating system for private capital, is hiring Senior and Staff AI, Full‑stack, and Backend Engineers in the London area; the company’s platform ingests a fund’s entire data estate—memos, conversations, decisions—and turns it into a searchable knowledge layer that powers AI‑driven deal sourcing, due diligence, and portfolio monitoring, so engineers get to work on cutting‑edge models and scalable infrastructure that directly accelerate high‑stakes investment decisions for top‑tier firms.

  • Onetrace

    Senior Backend Engineer

    • London Area, United Kingdom
    • 11-50 people

    Onetrace is hiring a Senior Backend Engineer in the London area to help power its construction project management platform for subcontractors, a tool trusted by over a thousand firms to gain visibility across small surveys to multi‑site mega projects. The role offers a chance to shape highly scalable, secure systems that directly impact profitability and operational control for a growing segment of the built environment.

  • Edmund

    Founding Acquisition Engineer

    • Prague, Czechia
    • 11-50 people

    Edmund is hiring a Founding Acquisition Engineer in Prague to help shape the data pipelines that power its digital assistant for manufacturing, a platform that blends machine learning and large language models to unlock the full potential of assembly lines. The role offers a rare chance for a strong engineer to influence core acquisition technology at a company building next‑generation AI‑driven operations.

  • Orbital Industries

    Senior Backend Engineer

    • London, England, United Kingdom
    • 11-50 people

    Orbital Industries is hiring a Senior Backend Engineer in London to help power its AI Industrial platform, which tackles the physical world’s toughest problems with frontier AI. The role offers a strong engineer the chance to shape core infrastructure for a company pioneering a brand‑new AI‑driven category.

  • Tundr

    Back End Engineer

    • Italy
    • 11-50 people

    Tundr, Italy’s first employee‑welfare fintech platform, is hiring a Back End Engineer to help power its subscription‑based card, mobile app and advanced HR console, offering a strong engineer the chance to shape infrastructure that makes corporate benefits accessible and strategic for companies of any size.

  • laiout

    Frontend Developer (Remote)

    • Poland
    • 11-50 people

    laiout, the world’s only fully automated AI platform for commercial floor planning, is hiring a remote Frontend Developer based in Poland. The role offers a chance to shape the UI of a product that instantly generates credible layout options from PDFs or DWG files, letting real‑estate and design teams iterate faster while seeing live metrics that blend AI speed with human judgment.

  • LawX

    Senior Backend Developer Java/Python (m/f/d)

    • Berlin, Berlin, Germany
    • 11-50 people

    LawX, an AI‑powered legal workflow platform that serves as the next‑generation operating system for notaries and law firms, is looking for a Senior Backend Developer (Java/Python) in Berlin. The role offers a chance to shape the core of a system that automates routine legal tasks with precision, letting engineers make a tangible impact on productivity and efficiency for legal teams.

  • Intergrid

    AI Engineer

    • Helsinki Metropolitan Area
    • 11-50 people

    Intergrid is hiring an AI Engineer in the Helsinki Metropolitan Area to help advance its Autopilot that manages hybrid industrial energy systems and real‑time power‑market trading. The role offers a chance to apply cutting‑edge AI to a platform already trusted by over 100 European sites, directly shaping the technology that enables a faster transition to renewable energy.