Top Tech Jobs & Startup Jobs in Madrid

Own end-to-end UI/UX and production-ready frontend code for an AI-native cybersecurity platform. Build and maintain a React+TypeScript+Tailwind design system, translate complex security workflows into intuitive interfaces, define human-in-the-loop AI interaction patterns, collaborate with backend engineers and security researchers, and contribute to component architecture and frontend standards.

Own end-to-end post-sales lifecycle for strategic EMEA hotel accounts: onboarding, adoption, retention, and renewal. Act as senior advisor on revenue strategy, run strategic reviews and advanced training, use AI-assisted analytics for ROI and churn risk, design adoption plans, mentor junior CSMs, and maintain accurate Salesforce account records.

Lead architecture and implementation of scalable full-stack features using NestJS and Next.js, integrate LangChain-driven AI, manage PostgreSQL schemas and performance, build responsive UIs with Tailwind CSS, implement authentication with Clerk, and ensure reliability with Puppeteer-based testing and automation.

Drive end-to-end performance and scalability testing for NVIDIA DGX Cloud across Kubernetes and NVIDIA components. Develop automated workload tests, monitoring and CI/CD frameworks, triage complex distributed-system issues, collaborate with customers and upstream open-source communities, and document and present findings.

Support end-to-end paid user acquisition: execute and scale campaigns across major ad platforms, implement and monitor tracking, run creative tests, analyze performance (CPA/ROAS/retention), maintain dashboards, and assist cross-functional teams to improve funnel conversions.

Lead and own Agent0: co-own roadmap with Product, hire and grow a senior AI engineering team, drive delivery of production-grade agentic AI, set evaluation and monitoring standards, prototype innovations, and provide thought leadership on AI production excellence.

Design and implement execution primitives for AI/agent workflows in Kestra's Java core, build and maintain plugins to connect LLM providers and agent frameworks, convert agent use cases into reusable blueprints with product, and ensure AI executions are observable, debuggable, correct, and reliable.

Own AI workflows product: discover and validate AI use cases with customers, define roadmap and specs, create reusable blueprints with engineering, and prioritize what not to build.

Build end-to-end AI features and prototypes across backend and frontend, prototype AI agent use cases, create UI/blueprints/examples to make AI workflows usable, and ship features quickly in collaboration with product and backend teams.

Drive and standardize installation procedures and best-known methods for AGS products. Coordinate certification templates, I&W spending, CE productivity analysis, and design-for-installation. Lead adoption of digital tools and AI for predictive planning and quality. Partner with Quality & Reliability, Engineering, and Manufacturing to resolve issues, participate in build & test, and manage CAPA and productivity improvements.

Lead design and delivery of leadership, manager, and talent development programs at a scaling AI company. Partner with HRBPs and senior leaders to build onboarding, succession, high-potential, and manager enablement frameworks from the ground up, balancing strategy and execution and driving organizational capability.

Lead the European Strategic Accounts portfolio for pure player key accounts, driving sales, margin, and profitability. Translate sell-through and market insights into assortment, inventory, and in-season actions. Own seasonal Go-To-Market processes and collaborate cross-functionally (Sales, Planning, Supply Chain, Marketing). Build, develop, and inspire a high-performing team while ensuring operational efficiency and data-driven decision making.