Senior JavaScript Engineer - Website, Booking Flow & Internal Tools

You will own livecolonies.com end to end. Your first job is to rebuild it: drop the Storyblok CMS from our Next.js stack, redesign, and build it to convert. You’ll help pick the stack: components, libraries and frameworks. From there you own our landing pages (large-project launches, campaigns, experiments) and run A/B tests in PostHog to prove what works.

You will also take ownership of our autonomous booking flow, the first of its kind in the industry. A prospect goes from listing to signed lease and payment without a human in the loop, which means deep integration with our CRM, internal API, document verification, e-signature and payments. The next step is full autonomy on the ops and back-office side as well as the lead side, and extending it well beyond the happy path. You will take it there.

Over time the scope widens: you take the lead on our n8n servers and workflows, contribute to our back-office front-end apps (React/TypeScript), and collaborate on AI workflows such as LangChain/LangGraph integrations.

You will occasionally work with a design agency. Most of the time you will not, so design judgment matters as much as engineering fundamentals.

Languages: French and English, fluent written and spoken, * Senior JavaScript/TypeScript engineer with a proven, demonstrable track record. Show us what you have shipped.

• Expert-level React and Next.js, with real experience in site performance, SEO and conversion optimisation.
• Comfortable building and hardening multi-system integrations where state lives in several places and edge cases are the norm.
• Strong bias for action. You scope, decide and ship without being handed a finished spec.
• Comfortable in a start-up with complex, changing stakeholder requirements.
• You run your own projects: scoping, sequencing, keeping stakeholders informed.
• Fluent with AI coding tools (Claude Code, Cursor or similar) as part of your daily workflow.
• Design-sensitive: you can take a page from brief to polished without a designer.
• Experience with PostHog (or similar) experimentation, and ideally n8n or comparable automation tooling.