Senior Fullstack Engineer (m/f/d)

<h3><span>Who we are</span></h3><p><span>BLOCKS is bringing big-company cloud efficiency to startups and SMEs. We guarantee <strong>20% savings from day one </strong>by pooling cloud spend into a group-buying model. From there, our AI agent “Major Tom” acts like a virtual DevOps engineer, finding waste, optimizing infrastructure, all in an automated way to maximize cloud efficiency. We are building Blocks because startups deserve cloud economics that actually make sense.</span></p><p><span>Our founders (</span><a target="_blank" href="https://www.linkedin.com/in/oliver-merkel-39283780/"><span>Oliver</span></a><span> and </span><a target="_blank" href="https://www.linkedin.com/in/dr-andreas-schroeter-65818/"><span>Andreas</span></a><span>) are serial entrepreneurs, have raised >$1 billion, and successfully sold multiple businesses. </span></p><h3><span>Your role</span></h3><ul><li><p>Build the core user-facing experience, from responsive dashboards to onboarding flows</p></li><li><p>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</p></li><li><p>Design and integrate scalable APIs, connecting frontend, chat clients, and backend services to internal data layers and platforms</p></li><li><p>Shape intuitive product experiences from signup, onboarding, workspace management, to AI interactions</p></li><li><p>Create and maintain chat integrations (Slack) e.g. OAuth setup, slash commands, interactive modals, webhook flows, event-driven logic etc.</p></li><li><p>Collaborate across engineering and product teams, aligning API contracts, improving platform features, and ensuring UX stays consistent as new features roll out</p></li><li><p>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</p></li></ul><h3><span>What you bring</span></h3><ul><li><p><strong>Frontend experience</strong>: Strong experience with modern Typescript frameworks (e.g. React with NextJS), building responsive UIs with clean component architectures</p></li><li><p><strong>Deep expertise in Python</strong>: End-to-end systems with async patterns (DI/await/async ORM); modern web frameworks (e.g., FastAPI/Django/Flask)</p></li><li><p><strong>API integration expertise</strong>: Design/expose scalable APIs; handle AWS data/internal services with multi-tenant isolation/rate limits</p></li><li><p><strong>Product and UX mindset</strong>: Comfortable crafting intuitive signup flows, onboarding experiences, and dashboards without a dedicated designer</p></li><li><p><strong>Great to have</strong>: 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</p></li><li><p><strong>Startup execution mindset</strong>: You have shipped 0→1 products fast with high ownership, autonomy, and accountability</p></li><li><p><strong>Curious, pragmatic problem solver</strong>: You experiment quickly, learn deeply, and optimize for impact over theory</p></li><li><p><strong>Direct communicator</strong>: You value clarity and feedback as tools for speed, improvement, and alignment</p></li><li><p><strong>Demonstrated impact</strong>: You have impressive achievements from previous jobs and from side projects. Please share them with us.</p></li></ul><h3><span>What we offer</span></h3><ul><li><p><span><strong>Build where AI actually matters. </strong>Real AI shipped into production that changes how companies run cloud infrastructure.</span></p></li><li><p><span><strong>Work with founders who’ve done it before. </strong>Unicorn builders, $1B+ raised, zero politics, fast calls, radical candor. We move, not debate.</span></p></li><li><p><span><strong>Zero to One. </strong>The opportunity to build a product which startups will consider standard infrastructure.</span></p></li><li><p><span><strong>Real ownership, not theater. </strong>We challenge, you make calls. Some will be wrong. That’s fine. We fix fast and keep shipping.</span></p></li><li><p><span><strong>Compensation that reflects ambition. </strong>Top market cash compensation plus meaningful equity upside.</span></p></li><li><p><span><strong>Berlin, in person, by design. </strong>Early stage companies are built together, not on Zoom. We support relocation.</span></p></li></ul><h3><span>How we hire</span></h3><p><span>We believe hiring should be like we build: Fast, respecting your time and ours, to the point: </span></p><ul><li><p><span>Intro call with a founding team member (30 min) </span></p></li><li><p><span>Tech interview/assessment with an engineer (~60 min)</span></p></li><li><p><span>In-person case study with the founders (1-2 hours)</span></p></li><li><p><span>Offer call within 24 hours with a founder (15 min)</span></p></li></ul><p>If you want comfort, this is not for you. If you want ownership and speed, we should talk.</p>