Rebolt

AI-Powered Company OS

Hiring — 5 openYC-W25Early

What Rebolt does

Rebolt sits on top of your systems and builds tailor-made AI software - to drive outcomes

5 open roles

Founding AI Engineer
San Francisco, CA, US / Remote (Madrid, MD, ES; Madrid, Community of Madrid, ES; Barcelona, CT, ES; Barcelona, Catalonia, ES; London, England, GB)Full-time3+ years$60K - $180K0.50% - 2.00% equityVisa: US citizen/visa only
What the role involves

Rebolt is building the platform that empowers companies to create internal applications in minutes by speaking with AI. Our mission is to enable technical and non technical teams to replace brittle spreadsheets and one-size-fits-all SaaS with their own internal tools. As a Founding AI Engineer, you’ll work across research and engineering to design, evaluate, and optimize AI systems systems that push the limits of what’s possible. This is a hands-on role for someone who thrives in ambiguity, understands both the math and the machine, and wants to build core technology, not just use it. You’ll join an early team where your ideas will directly shape the product and architecture. In this role you will... Ship production-ready multi-agent systems and build tools for debugging, deploying, and operating scalable AI workflows. Lead and establish research culture by staying current with AI research and prototyping ideas that push our product forward Implement your findings to quickly translate research insights into production systems. Work closely with customers to iterate and optimize our product. You will be a perfect fit if you... Have 2+ years of SWE/AI/ML engineering experience with deep understanding of LLM internals, agent architectures, and evaluation frameworks. Proven rapid-prototyping skills. You know how quickly turn research insights into a functioning prototype and then iterate over it iterate over it to turn it into a production-ready system. Hands-on full-stack development experience using TypeScript, React, and Node.js. Strong bias toward action, learning by doing and iterating effectively through complexity. Track record of impact via publications, open-source contributions, or significant real-world projects. Ability to distill research insights, identify underlying problems, and design robust solutions. Comfort thriving in ambiguity, shaping core technology and architecture in a fast-paced startup environment. What it means to join the team: Full autonomy to "just ship it" Modern tech stack Honest and low-ego environment Ownership of problems and solutions

Founding Forward Deployed Engineer
San Francisco, CA, US / Remote (London, England, GB; Madrid, MD, ES; Madrid, Community of Madrid, ES; Barcelona, CT, ES; Barcelona, Catalonia, ES)Full-timeAny (new grads ok)$60K - $180K0.50% - 2.00% equityVisa: US citizen/visa only
What the role involves

In this role you will... Embed yourself into the client workflow to identify problems and oportunites Build the team of forward deployed engineers Develop solutions using Rebolt to automate phone calls, email, and messaging systems Lead technical implementations and ensure smooth integration with customer systems and data sources Build custom integrations connecting our platform to freight management systems, CRMs, and databases Provide technical guidance throughout the customer lifecycle from onboarding to ongoing optimization Collaborate with engineering to feed customer insights back into product development You will be a perfect fit if you... Have engineering background with strong problem-solving and analytical skills You’re proficient in Python and Typescript Have experience with APIs & integrations including REST, GraphQL, OAuth, and JWT Can translate complex technical concepts into clear language for customers and stakeholders Have a customer-centric mindset You will be an exceptional fit if you also... Are adaptable and thrive in fast-paced, evolving tech environments Have worked with AI solving company problems Can diagnose technical issues a ship fixes quickly What it means to join the team: Autonomy to "just ship it" Modern tech stack Honest and low-ego Ownership of problems and solutions

Founding Frontend/Design Engineer
San Francisco, CA, US / Remote (Barcelona, CT, ES; Madrid, MD, ES; London, England, GB)Full-timeAny (new grads ok)$60K - $180K0.50% - 2.00% equityVisa: US citizenship/visa not required
What the role involves

We look for people who cares about users feeling delight when using a product. If you thrive in engineering and design, this role is for you. You'll shape the user experience thorugh crafting the product, and how the company is perceived by designing our brand. In this role you will... Design the user experience Implement animations and interactions in code that delight users Translate customer requests into elegant design solutions Build and maintain our design system with reusable components and patterns Prototype rapidly to test ideas and validate concepts You will be a perfect fit if you... Are extremely curious Can communicate your ideas to both technical and non-technical stakeholders Are good at problem solving and can navigate ambiguous design challenges Have strong frontend skills with attention to detail and pixel-perfect execution Have experience with React and Tailwind for building modern interfaces Have proof of past work using both figma, and code What it means to join the team: Autonomy to "just ship it" and taking initiative constantly Modern tech stack: Nextjs, Tailwind, Typescript Honest and low-ego Ownership of problems and solutions

Founding Growth Engineer
San Francisco, CA, US / Remote (Madrid, MD, ES; London, England, GB)Full-timeAny (new grads ok)$60K - $180K0.50% - 2.00% equityVisa: US citizen/visa only
What the role involves

Founding Growth Engineer Global / Remote / Full-time We're seeking a Founding GTM to drive growth to make us go from 1 to 100. This role is perfect for someone who combines technical excellence with entrepreneurial instincts to maximize revenue through experimentation. In this role you will... Design and implement growth experiments across our entire product funnel from acquisition to activation Build cross-product features like billing systems, onboarding flows, and signup optimization tools Develop growth strategies and measurement frameworks to guide experimentation and evaluate success Optimize conversion rates through A/B testing, funnel analysis, and user behavior insights Create tools and systems that enable better user onboarding and engagement across products Growth initiatives that span marketing, product, and engineering You will be a perfect fit if you... Have engineering experience with comfort across the entire tech stack Have b2b sales or consulting experience with significant past impact Are entrepreneurially minded and can work independently to identify and solve growth opportunities Have product and design intuition to create user-facing features that drive engagement You will be an exceptional fit if you also... Have founder or startup experience and understand the full business context Are skilled at data analysis and can craft hypotheses, measure significance, and interpret results Have GTM experience Are curious and scrappy with a willingness to learn as needed What it means to join the team: Autonomy to "just ship it" Modern tech stack Honest and low-ego Ownership of problems and solutions

Founding Backend Software Engineer
San Francisco, CA, US / RemoteFull-time1+ years$60K - $180K0.50% - 2.00% equityVisa: Will sponsor
What the role involves

Rebolt is building the next-generation no-code platform that empowers companies to create and deploy custom full-stack applications in minute. Our mission is to enable both technical and non technical teams to replace brittle spreadsheets and one-size-fits-all SaaS with their own internal tools. Why Join Participate in building a cutting-edge AI agent platform from 0 to 1 and scale it to production. Significant founding team equity. Work directly with AI/ML systems, web agents, and full-stack development. Shape the technical architecture and culture of a fast-growing YC-backed startup. You will be a perfect fit if you… Have 2+ years of backend engineering experience and a solid foundation in both Computer Science and software engineering principles. We're also open to exceptional college grads with strong intern/co-op experience. Are fluent in Python and TypeScript and have worked with FastAPI and/or NextJS in the past. Understand how databases (KV, SQL, Document based) work, when each of them should be used and how they can be optimized. Have previously developed, tested and scaled RESTful APIs in the past. Are self-motivated, like to take ownership, have low ego; desire to work on a fast-paced, intense, fun team. Passion for building a world-class engineering culture. Are product-focused, understanding that technology is a means to build an amazing product, not an end in itself. Value code quality, but are pragmatic, shipping fast when needed. Are excited about AI/ML applications and have previously worked in LLMs, agents, and automation Nice to have: Knowledge of OOP design patterns, clean architecture, event sourcing and Test Driven Development. Experience with DevOps tooling: Docker, Kubernetes, Github Actions and cloud platforms. Thorough knowledge of the Linux operating system. About our hiring process: 30 minute interview with a founder to discuss your background If we think you are a potential fit, we will send you a take home assignment. One hour interview diving into your take home submission where we’ll ask you about your solution, etc. Final interview with the full team. What it means to join the team: Own the engine room. Architect and ship the core services that power our multi-agent AI workflows: rock-solid restful APIs, data models built for evolution, and deployment/debug tools that just work. Be the go-to expert. Troubleshoot critical issues in production, mentor peers on system design, and evangelize best practices across services and languages. Move at startup speed. Partner directly with customers: jump on customer calls, diagnose pain points, and deliver impactful improvements in hours, not quarters.

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Company facts compiled from public sources and last refreshed 9 September 2026. Details change; treat the company’s own site as the authority.

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