Top Tech Jobs & Startup Jobs in Madrid

Lead the Human Data function to deliver high-quality training data and evaluations. Manage Team Leads and AI Tutors, define annotation guidelines and QA processes, scale operations globally, recruit and develop talent, collaborate with engineering and program teams, and report outcomes to senior leadership.

Lead and grow a team of software engineers building Playgami platform services. Own technical quality, architecture, and delivery for reliable, scalable, low-latency distributed systems. Collaborate with product, design, and leadership while mentoring engineers and driving hiring and performance development.

As the first designer at turbopuffer, you'll own designs for products, web, and marketing, ensuring a mix of whimsy and professionalism across all surfaces.

Edit and repurpose poker video content, localize/dub into assigned GEO languages, manage and schedule short-form social accounts, track workflows and performance, use AI tools to support translation and operations, and assist with social media administrative tasks.

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.

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.