Founding Engineer
hace 2 semanas
Title:Founding Engineer (Agentic Systems & AI Infrastructure)Location:Remote | Full-Time | Founding TeamAbout the CompanyAn early-stage AI infrastructure startup is building a next-generation operating system for data—combining dynamic ontology engines with advanced agentic systems capable of autonomous, transparent workflow execution. Backed by tier-one investors and already partnering with global enterprises, the company is defining a new category of AI middleware.Role OverviewAs a Founding Staff Engineer, you’ll take end-to-end ownership of core AI infrastructure and help shape the technical foundation from the ground up. This role is highly hands-on, working directly with the founding team to architect agent systems, semantic layers, reasoning engines, and distributed runtime environments.What You’ll Work OnAgent Infrastructure:Orchestration, memory, task planning, and execution logic using Python and open-source LLM frameworks. Ontology & Semantic Systems:Automated layers that unify structured and unstructured data. Agent Runtime:Planning, tool execution, distributed system observability, and robust runtime workflows. Data Infrastructure:Metadata systems, connectors, ETL pipelines, and vectorized storage. Reasoning Engines:Hybrid LLM + symbolic pipelines, task decomposition, and long-term memory. Engineering Culture:Define standards for code quality, system design, and technical velocity while contributing to early hiring.What You Bring5+ years in backend, infrastructure, or AI systems engineering. Strong Python skills plus experience with LLMs, vector DBs, LangChain, or custom agent tooling. Background in agentic systems, reasoning pipelines, or semantic/ontology-based architectures. Familiarity with knowledge graphs, schema reconciliation, or semantic modeling. Experience across modern data infrastructure (e.g., dbt, BigQuery, Airflow) and cloud environments (AWS/GCP). Prior startup or early-stage experience; strong preference for candidates who have built AI or data infrastructure at scale. A builder mindset: fast, hands-on, customer-centric, and comfortable operating in ambiguity.Why Join Work onfrontier AI infrastructurewith real enterprise adoption. Founding-level ownershipand decision-making influence. Move fast and solve complex technical problems with minimal bureaucracy. Backing from leading US and European investors with a $M
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Founding Engineer
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Madrid, España DraftyAI A tiempo completo**Our Mission** At DraftyAI, we're on a mission to revolutionize the legal landscape by leveraging artificial intelligence to accelerate document drafting for licensed attorneys, enabling them to better serve their clients and elevate their law practice. **The Role** As a full stack software engineer at DraftyAI, you will play a crucial role in helping us...
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Founding Engineer
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Madrid, España oryxsearch.io A tiempo completoFounding Engineer to build AI infrastructure, architecting agent systems and runtime environments.
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Founding Backend Engineer — Remote, Equity
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Madrid, España Owen Thomas | Pending B Corp™ A tiempo completoA privately funded communications start-up in Spain is looking for a Founding Backend Engineer to design and develop core backend services using Node.js and TypeScript. This role entails building scalable backend systems and integrating external APIs while working in a collaborative remote-first culture. The candidate should possess at least 7 years of...
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Founding Engineer
hace 2 semanas
Madrid, España oryxsearch.io A tiempo completoTitle:Founding Engineer (Agentic Systems & AI Infrastructure)Location:Remote | Full-Time | Founding TeamAbout the CompanyAn early-stage AI infrastructure startup is building a next-generation operating system for data—combining dynamic ontology engines with advanced agentic systems capable of autonomous, transparent workflow execution. Backed by tier-one...
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Founding Senior Software Engineer
hace 1 semana
Madrid, España Taizen A tiempo completoA leading tech company in Madrid seeks a Founding Senior Software Engineer to develop an AI analytics platform aimed at enhancing product, marketing, and sales teams' understanding of customer feedback. The position requires substantial experience in product or data platforms and is not suitable for those with mainly freelance or consulting backgrounds. The...
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Founding Full-Stack Engineer: AI-Driven Data Platform
hace 2 semanas
madrid, España Taizen A tiempo completoA dynamic tech company in Madrid is seeking a Founding Senior Full-Stack Software Engineer to build a customer insights platform. You will focus on developing the frontend and backend for their web app and handling data pipelines with a close collaboration with AI scientists. The ideal candidate has strong skills in React, NextJS, TypeScript, and NodeJS, and...
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Founding Platform Engineer
hace 3 semanas
Madrid, España SLNG A tiempo completoSLNG is building the backbone for real-time speech AI, enabling developers to run voice applications anywhere in the world with local compliance and ultra-low latency. Our founding team comes from the core of AI and developer tooling in the USA, with experience scaling platforms trusted by the world’s best builders.We’re bringing the San Francisco...
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Full-Stack Lead Engineer
hace 2 días
Madrid, España Careergenie A tiempo completoAbout the job Full-Stack Lead Engineer (Founding Team)Company: CareerGenieLocation: Remote (Spain orPortugal-based)Type: Full-TimeCompensation: 45,000- 60,000/year + EquityAbout CareerGenieCareerGenie is reimagining how people find meaningful work witha platform powered by multiple agents like AI Recruiter, AI Career Coach and AI Global Mobility Expert...
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madrid, España Talent-R A tiempo completo3 Golang Projects in one : Golang Back-end engineer (not mandatory to know Golang) : Remote from Spain with an office in Barcelona. : From 50.000€ to 100.000€ per year + Equity There are 3 different Companies in Barcelona 1. A Scaleup from Switzerland called BLP (90e / 70 tech), building an Automated ERP and setting up their Hub in Barcelona - up to 85K...
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Full-Stack Lead Engineer
hace 3 días
Madrid, España Careergenie A tiempo completoAbout the job Full-Stack Lead Engineer (Founding Team) Company:CareerGenie Location:Remote (Spain orPortugal-based) Type:Full-Time Compensation:45,000- 60,000/year+ EquityAbout CareerGenie CareerGenieis reimagining how people find meaningful work witha platform powered by multiple agents like AI Recruiter, AI Career Coach and AI Global Mobility Expert...
