Founding Engineer jobs

Founding Engineering role with early IC focus (first 3–6 months) to build a multi-modal AI agent product (voice + SMS + email). Responsibilities include building real-time voice systems (streaming audio, low latency, turn-taking), SMS and email automation wit…

Founding team role. Drive end-to-end create latency to near-zero, cut cost per generation, keep pipelines stable under load, and ship continuously across infrastructure + models. Core loop: create → remix → repeat. Wants a strong full-stack engineer with a bi…

BetterDB is building the tooling ecosystem for Valkey, a high-performance Redis fork backed by AWS, Google, and Oracle. They are starting with observability including historical persistence, pattern analysis, anomaly detection, and Prometheus export to help d…

BrightCore is hiring its first engineer (Founding Engineer) to own key backend work for a gym/fitness SaaS. The role is 70% NestJS/Postgres backend and 30% Coral, an AI agent for member retention using WhatsApp. The ideal candidate can ship solo, has 3–5 year…

Recover Systems is building infrastructure for restoration work, streamlining remediation contractor operations by handling red tape and headaches. The platform is built from insurance requirements, financial ledgers, and spatial intelligence, collapsing many…

Students with disabilities are not receiving the support they deserve, and Waypoint is changing that by building AI tools that special education teachers use to better support students with Individualized Education Programs (IEPs). Hiring a founding engineer …

Octozi is a revenue-generating seed-stage company building AI agents for clinical development workflows. Bringing a drug to market can take a decade and cost up to $2B, keeping treatments expensive and delaying life-saving therapies for the patients who need …

MintMCP helps enterprises safely roll out agents to the entire organization with governance around MCP tools and agents (e.g., Claude Code / Codex / Cowork). They are building an MCP gateway with abstractions for 1) preventing agents from doing unintentionall…

Kiloforge is a company factory: a system that autonomously ideates, validates, builds, and distributes software products. Before AI, many niche communities and problems had no way to be served with first-class, high-quality software; as software trends toward…

Building an executive voice engine (Eve), a multi-agent AI system that learns how a leader thinks and produces content indistinguishable from what they'd write. Role includes full AI stack and product: agent orchestration, evals, RAG, prompt chaining, model t…

Strix is building the largest open-source AI pentesting framework. The role is for a founding engineer to help take a 0→1 journey and own the architecture of an already-at-scale product. You will work across infrastructure, product, and research tooling, usin…

Founding Engineer role joining co-founders (Neil, CEO and Jeff, CTO) as the first employee. Own systems and architecture with end-to-end ownership across the stack: database, geostatistical backend services, and 3D client-side rendering. Work rooted in agenti…

VozParking is an early-stage mobility startup focused on helping drivers make faster, clearer parking decisions under pressure. This is not meant to replace Google Maps or Waze. It’s a parking decision layer that sits on top of navigation tools, with voice as…

Korva is building the AI-native operating system for health plan administration. Self-funded health plans cover 100M+ Americans, yet third-party administrators (TPAs) run them on manual processes and legacy software. We're rebuilding that back office with AI …

Arvo is building an AI meeting assistant for investment banking and private equity. Hiring a Founding Engineer to work closely with the founders across desktop, backend, and AI workflows. High-ownership role with significant influence on product, architecture…

Bustem helps e-commerce brands find and shut down copycats, counterfeiters, and unauthorized sellers. In <12 months the company reached $3M+ ARR, 150+ brands, profitable with no outside capital. Hiring a Founding Engineer to build core systems for detection a…

We're building the operational memory and state management layer for production AI agents — persistent execution history, shared state, and ACL-gated memory so agents get more reliable over time without constant human intervention. Well funded and assembling …

Every time two companies in the physical economy need to exchange data, someone builds a custom integration by hand. Analysts, engineers, QA. All manual. Every time. Google "EDI" if you haven't. It's wild. We built AI agents that do the whole thing: gather re…

I'm Gio, CTO of Foundry Robotics. We're an early stage startup building robotics for manufacturing applications. We are looking for people with one or more of these skills: 1) Tinkerer/mechanical engineer -- Build robots in our lab with a mix of design and ha…

Founding Engineer role at GenTube. Turning consumers into creators; AI creation as entertainment. Early signals: ~10M creations/month, daily usage. Responsibilities: own core loop (create → remix → repeat), real-time generation (latency, cost, scale), feed an…

Promptless (YC) builds AI agents that automatically update customer-facing documentation. YC-backed seed-stage startup. Two founding roles in San Francisco (onsite): Founding Docs Practice Lead — own the documentation practice, onboard customers, build method…

AI health coaching startup with a live product built on biomarkers (DNA, wearables, labs, food logs). Seeking a Founding Engineer to own architecture and infrastructure, modernize the stack (containerize, CI/CD), and lead a HIPAA-compliant AWS migration. Work…

MintMCP helps enterprises safely do more with Agents by building an MCP gateway with the abstractions enterprises need to deploy long-running agents across organizations while limiting blast radius and providing appropriate tools. The small team operates on t…

Scorecard builds simulation environments and reward models that frontier AI labs and enterprises use to train and evaluate their agents. Founding team built simulation infrastructure at Waymo, SpaceX, and Uber ATG. Company is ~7 people, $3.75M seed led by Kin…

BetterDB is building the tooling ecosystem for Valkey, the high-performance Redis fork backed by AWS, Google, and Oracle. Starting with observability — historical persistence, pattern analysis, anomaly detection, and Prometheus export — so you can debug incid…

Tracebit is an Accel-backed, UK-founded security product company taking a new look at canaries for intrusion detection. They work with companies such as Docker, Riot Games, Synthesia and Zepz. Hiring founding roles based in London and New York (Founding Engin…