Frontend Software Engineer — SvelteKit & TypeScript

Full-time or Internship | Long-term collaboration - NO AGENGIES!!! We are looking for a strong frontend engineer who wants to take ownership of the product layer that makes complex infrastructure data understandable, actionable, and fast. You will work directly on our SvelteKit application. The interface used every day by property managers, operations teams, and customers. This is not a typical frontend role. You will work with real data from real buildings, build tools that process high-volume consumption data, and collaborate closely with our backend engineers and founding team. You will own what you build. What You Will Work On Build and improve our SvelteKit web application Write strongly typed TypeScript across all layers of the frontend Implement server-side rendering, routing, and load functions in SvelteKit Build and maintain reusable UI components with Tailwind CSS and DaisyUI Integrate backend APIs using oRPC Help shape the contracts between the frontend and backend Write reliable tests using Vitest and JSDOM Work with Bun as the runtime and for CLI scripting Improve developer tooling, code quality, and frontend reliability Debug real-world issues across APIs, data pipelines, and the UI Work closely with the founding team on product and architecture decisions Who We Are Looking For We are looking for someone unusually strong, precise, and product-minded. You should enjoy building clean, performant interfaces on top of complex data systems. You do not need to know everything already, but you should learn quickly, think from first principles, and care deeply about the end result. You are a strong fit if you: Have at least 2–4 years of professional experience with SvelteKit and TypeScript Understand Svelte’s reactivity model, stores, and component lifecycle Write strict and idiomatic TypeScript, including generics and utility types Avoid implicit any and care about type safety Are comfortable working in Unix-based development environments Care about code quality, reliability, and shipping features that actually work Enjoy working with real-world data and complex product requirements Perform well in a fast-moving environment with high ownership Have a portfolio or GitHub profile you are proud of Tech Stack SvelteKit · TypeScript · oRPC · Tailwind CSS · DaisyUI · Vitest · JSDOM · Bun · Git Nice to Have Zod Drizzle ORM PostgreSQL Bun workspaces Authentication patterns such as sessions, JWT, and OAuth Professional working proficiency in German Open-source contributions Experience with IoT, energy, property technology, or data-heavy products A link to your GitHub profile, portfolio, or previous projects! NO AGENGIES!!!