Senior Fullstack Engineer

Build the core user-facing experience and backend services for BLOCKS' cloud efficiency platform. You'll develop responsive dashboards, Python async endpoints, scalable APIs, and chat integrations that power the product across frontend, backend, and AI interactions.

What you'll do

• Build the core user-facing experience, from responsive dashboards to onboarding flows
• Develop and extend backend services in Python, implementing async endpoints, data flows, and internal APIs that power chat interactions, dashboards, and multi-tenant runtime operations
• Design and integrate scalable APIs, connecting frontend, chat clients, and backend services to internal data layers and platforms
• Shape intuitive product experiences from signup, onboarding, workspace management, to AI interactions
• Create and maintain chat integrations (Slack) e.g. OAuth setup, slash commands, interactive modals, webhook flows, event-driven logic etc.
• Collaborate across engineering and product teams, aligning API contracts, improving platform features, and ensuring UX stays consistent as new features roll out
• Improve reliability and delivery workflows, contributing to CI/CD pipelines, frontend build optimizations, and quality checks that keep both web and chat clients fast and dependable

What you'll need

• Strong experience with modern Typescript frameworks (e.g. React with NextJS), building responsive UIs with clean component architectures
• Deep expertise in Python with end-to-end systems using async patterns (async/await/async ORM) and modern web frameworks (e.g., FastAPI/Django/Flask)
• API integration expertise: design/expose scalable APIs; handle AWS data/internal services with multi-tenant isolation/rate limits
• Product and UX mindset: comfortable crafting intuitive signup flows, onboarding experiences, and dashboards without a dedicated designer
• Startup execution mindset: shipped 0→1 products fast with high ownership, autonomy, and accountability
• Curious, pragmatic problem solver who experiments quickly, learns deeply, and optimizes for impact over theory

Nice to have

• Practical experience shipping event-driven chat apps or bots (e.g., Slack Bolt SDK with OAuth, JS/TS integrations for Microsoft Teams etc.), including webhook processing and interactive UI flows
• Demonstrated impact from previous jobs and side projects

What they offer

• Build AI that ships into production and changes how companies run cloud infrastructure
• Work with founders who've built unicorns, raised $1B+, and move fast with radical candor
• Real ownership with autonomy to make calls and ship quickly
• Top market cash compensation plus meaningful equity upside
• Berlin office, in-person by design, with relocation support