Karumi

Karumi is building an AI agent that joins video calls and delivers live, interactive product demos autonomously — answering questions, navigating the product in a real browser, and booking follow-ups, 24/7 and in any language. We're a Y Combinator company with real traction (thousands of demos delivered and a growing book of paying B2B SaaS customers) and we're now growing our go-to-market team. As a Account Executive, you'll own the full sales cycle and help us turn strong inbound demand and an outbound motion into closed revenue. You'll be the first dedicated sales hire, working directly with the founders to define our playbook from the ground up. What you'll do Own the full cycle: prospect, qualify, run discovery, demo, negotiate, and close B2B SaaS customers. Build and refine the sales playbook — messaging, qualification criteria, objection handling, and pricing conversations. Run an outbound motion to larger SaaS players while converting high-intent inbound leads. Partner with the founders and engineering on customer needs, feedback, and deployment. Keep CRM (HubSpot) clean and use call/demo data to sharpen the funnel. Who you are 5+ years closing B2B SaaS deals, ideally at an early-stage / high-growth startup. Comfortable selling a fast-evolving, technical AI product to technical and GTM buyers. Self-directed and happy operating with little structure — you build the process, not inherit it. Strong discovery and demo instincts; you can run a deal end to end. Excited about AI agents and the future of how software is sold. Your First 90 Days By day 30: you'll have led 20 live demos and closed your first $10K+ deal. By day 60: you'll be running the full cycle independently and feeding real deal insights back into our pricing and messaging. By day 90: you'll have codified our objection-handling wiki — the playbook that trains both the team and the Karumi agent on how to handle the questions that come up in every deal. Why Karumi Real ownership on the GTM team at a YC-backed, revenue-generating AI company. Direct impact on the playbook, pricing, and the team you'll eventually help build. $100–140K base with $200–300K OTE. Based in New York, in office. The Team Karumi was founded by Pablo Omeñaca and Toni López, who previously built StackAI together — Pablo as founding engineer and then COO leading customer implementations, and Toni as an early engineer building its agentic systems. They helped grow StackAI from early revenue to roughly $10M ARR.

The Opportunity Join our AI engineering team in the US to build the core intelligence behind our platform. You'll work at the intersection of voice AI, browser automation, and large language models - creating agents that can listen, speak, navigate interfaces, and interact naturally with users in real-time. This role combines cutting-edge AI with practical systems work. You'll design voice experiences, build browser agents that understand and control web applications, and optimize LLM behavior for production reliability. We ship working AI features that solve real problems, balancing innovation with pragmatic constraints. We sponsor visas for qualified candidates. Core Responsibilities - Build and optimize voice AI systems using speech-to-text and text-to-speech models - Design browser agents that navigate, understand, and interact with web applications - Implement browser automation with computer vision and DOM understanding - Engineer prompt systems and LLM workflows for consistent, intelligent behavior - Create evaluation frameworks to measure voice quality, agent accuracy, and user experience - Integrate multimodal AI - combining voice, vision, and language understanding - Build real-time AI pipelines where latency and reliability are critical - Manage the AI Infrastructure and take care of it - Monitor and improve AI system performance in production environments Technical Requirements - Production experience with LLMs (OpenAI, Anthropic, or open-source models) - Hands-on work with speech AI (STT/TTS systems like Deepgram, ElevenLabs, Whisper) - Experience with browser automation (Playwright, Puppeteer, Selenium) or computer vision - Strong Python skills with async programming and real-time systems - Understanding of prompt engineering, retrieval systems, and agent frameworks - Ability to debug complex AI behaviors and build observability tools - Software engineering fundamentals for production AI systems Nice to Have - Experience building autonomous agents or multi-step AI workflows - Knowledge of computer vision for UI understanding and visual grounding - Fine-tuning or training language models for specialized tasks - Real-time audio processing and streaming architectures - Background in NLP, machine learning research, or AI systems Why Karumi - Meaningful equity stake in a backed, fast-growing company\ Work on cutting-edge voice AI and browser agents in production\ Shape how AI systems interact with users and software interfaces\ Small team with direct impact on core product capabilities\ Gym Visa sponsorship available

About Karumi Karumi is a Y Combinator–backed (F25) company building the first agentic product-demo platform. Our AI agent joins live video calls, runs personalized product demos, reasons through prospect questions, clicks around the product in real time, qualifies leads, and routes them into the CRM — 24/7, in any language. We're a small, fast-moving team replacing a slow, manual part of the sales motion with autonomous agents. We hire ahead of need and screen carefully. Expect a sharp bar, a fast process, and real ownership from day one. What you'll do Own the post-sale journey: get customers live on Karumi quickly, prove value fast, and turn early adopters into renewals and references. You're the person making sure the AI demo agent actually performs in each customer's world. Responsibilities Onboard new customers — connect their product, train the agent, get demos running. Drive adoption, monitor demo performance, and step in before issues become churn. Own renewals and expansion; spot accounts ready to grow. Be the voice of the customer back to product and engineering. You're a fit if you Have 2+ years in CS, onboarding, or implementation at a B2B SaaS company. Are technical enough to configure a product and troubleshoot integrations. Communicate clearly and stay calm when something breaks. Like building the CS function, not just running a script someone gave you. Nice to have: early-stage experience, familiarity with sales/GTM tooling, multilingual.

Company Karumi is building a world where software explains and sells itself. We build AI agents that interact with real products in real time—joining video calls with prospects, navigating a product in a real browser, and delivering the “aha moment” instantly. Role We’re hiring a Forward Deployed Engineer (FDE) to own end-to-end customer rollouts of Karumi: configuring, deploying, and operating our AI agent in real customer environments. This is a hands-on, high-ownership role for someone early in their career with strong technical instincts who enjoys troubleshooting and wants deep exposure to how modern AI products get implemented and operated in production. Location: New York, NY (will consider candidates physically in the San Francisco Bay Are and in Madrid, Spain, particularly if open to relocation) What you’ll do Roll out Karumi for new customers: setup, configuration, validation, and ongoing maintenance Perform QA and troubleshooting to ensure reliability and a great end-user experience Adapt Karumi to different customer workflows, UIs, and edge cases Use lightweight scripting/automation to improve internal implementation tools and reduce manual work Capture product feedback from hands-on deployments and customer interactions; communicate insights to product/engineering Help define best practices for implementing and operating Karumi at scale What we’re looking for 1–3 years in Forward Deployed / Implementation Engineering, QA/testing, or solutions engineering Engineering mindset: you enjoy debugging systems, finding root causes, and optimizing how things work Strong attention to detail and a quality-first approach Empathy for users and ability to translate real-world issues into clear product feedback BS/MS in CS/Engineering/STEM (or equivalent practical experience) Scripting, automation, or coding experience or willingness to learn Comfort working directly with customers in technical contexts Interest in AI-driven products and real-world deployments Why join Learn a ton about how modern AI systems are built, deployed, and operated in production High impact early—your work directly affects customer success and product quality Fast-moving team where ownership and problem-solving matter more than titles Opportunity to grow into engineering, product, solutions, or customer-facing paths

Karumi is building an AI agent that joins video calls and delivers live, interactive product demos autonomously — answering questions, navigating the product in a real browser, and booking follow-ups, 24/7 and in any language. We're a Y Combinator company with real traction (thousands of demos delivered and a growing book of paying B2B SaaS customers) and we're now growing our go-to-market team. As a Growth hire, you'll own how Karumi reaches its market. You'll build the demand-generation engine from scratch — across content, paid, lifecycle, and our own AI agent as a top-of-funnel growth loop — and turn it into a repeatable source of pipeline. What you'll do Build and own the growth engine: demand gen, content/SEO, paid acquisition, and lifecycle. Design and run experiments to drive qualified inbound and improve conversion across the funnel. Use Karumi's own demo agent as a growth channel and a flagship example of the product. Own the analytics: define metrics, instrument the funnel, and report on what's working. Partner with the founders and the AE on messaging, positioning, and pipeline targets. Who you are 5+ years in growth, or an early growth hire at a Series A/B startup. A full-stack marketer — you run content, paid, SEO, and lifecycle yourself, not just brief a team. You've actually scaled revenue and growth before, and can point to the numbers. Strongly analytical; you instrument, measure, and iterate rather than guess. Excited about AI and a genuinely novel product category. Your First 90 Days By day 30: you'll have audited our funnel, picked the first growth channels to bet on, and launched your first experiments. By day 60: you'll have a repeatable inbound motion running, with metrics instrumented end to end and early wins to point to. By day 90: you'll have turned Karumi's own demo agent into a working top-of-funnel growth loop and defined the playbook for scaling it. Why Karumi Real ownership on the GTM team at a YC-backed, revenue-generating AI company. Build the growth function — and the team — from zero. $140–180K plus. Based in New York, in office. The Team Karumi was founded by Pablo Omeñaca and Toni López, who previously built StackAI together — Pablo as founding engineer and then COO leading customer implementations, and Toni as an early engineer building its agentic systems. They helped grow StackAI from early revenue to roughly $10M ARR.

About Karumi Karumi is a Y Combinator–backed (F25) company building the first agentic product-demo platform. Our AI agent joins live video calls, runs personalized product demos, reasons through prospect questions, clicks around the product in real time, qualifies leads, and routes them into the CRM — 24/7, in any language. We're a small, fast-moving team replacing a slow, manual part of the sales motion with autonomous agents. We hire ahead of need and screen carefully. Expect a sharp bar, a fast process, and real ownership from day one. What you'll do Build Karumi's demand engine. As an early marketing hire you'll own a mix of content, demand gen, and brand — telling a sharp story about agentic selling and turning attention into qualified pipeline. Responsibilities Own content and narrative: how we explain agentic demos to a skeptical market. Run demand-gen experiments across channels and double down on what converts. Build the website, launches, and campaigns alongside the founders. Partner with sales to keep the inbound-to-pipeline flow tight, and report on what's working. You're a fit if you Have 3+ years in B2B SaaS marketing, ideally a generalist or growth-leaning role. Can write — clearly, with a point of view — and ship without a big team. Are data-driven about channels and funnels. Want to define a category, not just market into an existing one. Nice to have: early-stage / founding marketer experience, product marketing chops, design or no-code fluency.

The Opportunity Join our product engineering team in the US to build features that directly impact how customers experience and adopt our platform. This role bridges technical execution and product thinking - you'll ship user-facing features while making architectural decisions across the entire stack. You'll work end-to-end: designing interfaces, building APIs, optimizing performance, and deploying to production. We move fast, iterate with users, and expect engineers to own problems from concept to launch. We sponsor visas for qualified candidates. Core Responsibilities - Build full-stack features from UI components to backend services - Design and implement responsive, intuitive user interfaces with React - Develop high-performance APIs using FastAPI and async Python - Work with LLM integrations, prompt engineering, and AI-powered workflows - Deploy and monitor features across our AWS infrastructure - Gather user feedback and iterate rapidly on what you ship Technical Requirements - Strong full-stack development experience (frontend + backend) - Proficient in React and modern JavaScript/TypeScript - Python skills with FastAPI or similar frameworks - Experience with PostgreSQL, Redis, and async patterns - Comfortable with AWS/Azure/GCP, deployment pipelines, and infrastructure basics - Product mindset - you care about user experience and customers, not just code Nice to Have - Experience building with LLMs and AI-powered features - Browser automation or headless browser technologies - Design sensibility and attention to UI/UX details - Previous startup or 0-to-1 product experience Why Karumi - Meaningful equity stake in a backed, fast-growing company\ End-to-end ownership of features users interact with daily\ Direct impact on product direction and company trajectory\ Small team where shipping matters more than process\ Gym\ Visa sponsorship available