Help craft the online experience for top-tier B2B SaaS companies — and set a higher standard for modern marketing websites. Our website is our most important marketing asset — where pipeline starts, brand is formed, and every campaign dollar lands. We need a Principal-level architect who sets our technical direction rather than taking tickets: an elite engineering mind who understands that code is a lever for revenue. You’ll work on a stack built on Astro.js, TypeScript, and Sanity, integrated with HubSpot, GTM, Google Analytics, Intercom, and Zendesk. In this role, you will… Own the systems architecture for our marketing website — authoritative decisions on platform, stack, infrastructure, and performance, with daily hands-on work in the codebase Design the technical foundation for experimentation at scale: A/B testing frameworks, personalisation middleware, and rapid iteration pipelines Architect the Sanity content infrastructure for a “Create Once, Publish Everywhere” workflow, including content models, reusable blocks, and ingestion pipelines Own the website data layer, event architecture, and tracking standards; monitor and optimize Core Web Vitals, uptime, and technical SEO/AI visibility continuously Prototype and deploy AI-driven features — personalisation, dynamic content, intelligent search — with AI tooling as a default part of your workflow Provide technical oversight of external agencies and contractors: enforcing PR standards, CI/CD pipelines, and ensuring output meets our architectural bar Bring data-backed recommendations to senior stakeholders, mentor colleagues, and raise the bar for web engineering across the organization This position is for you if you have… 12 years of web development experience, with at least 5 years at senior or principal level in B2B SaaS Practical Astro.js and Sanity experience; Next.js/TypeScript backgrounds considered with strong Sanity proficiency A track record of guiding major web projects end-to-end — architecture through launch — with rigorous engineering workflows: version control, PR reviews, deployment pipelines, and incident management Experience designing experimentation and personalisation platforms: A/B testing systems, dynamic content delivery, and scalable growth architecture Technical SEO and AI visibility knowledge at the systems level, plus deep analytics and tracking experience across GTM, event architecture, and platforms like HubSpot, Marketo, and Segment Daily use of AI development tools (Cursor, GitHub Copilot, Claude, etc.) and a track record of shipping AI-driven site features The ability to communicate technical trade-offs clearly to non-technical stakeholders Benefits we offer… Competitive compensation package, including equity Great work equipment and home office allowance for remote locations Health care benefit and leisure time insurance €1,000 annual personal learning budget Sports and wellbeing allowance LI-HYBRID