About Huzzle At Huzzle, we connect exceptional talent with top opportunities at leading companies across the UK, US, Canada, Europe, and Australia. Our clients include startups, digital agencies, and tech platforms in industries such as SaaS, MarTech, FinTech, and HealthTech. Unlike an outsourcing agency, we place you directly with a client where you’re hired in-house as a valued member of their team. About the Company A fast-growing, post-revenue AI startup is building an AI-powered SAP Consultant platform for enterprise customers. The company works with DAX 40 and Fortune 500 clients Job Type: Full-time Location: On-site in Berlin, Germany Job Summary We are seeking a high-caliber Fullstack Engineer to join a fast-moving team dedicated to building production-grade applications from the ground up. This is a role for a true builder—someone who thrives on end-to-end ownership, from translating broad business requirements into technical architecture to deploying and monitoring robust systems. If you are a self-directed engineer who balances speed with architectural integrity and enjoys the challenge of integrating AI and complex data pipelines, this is the place for you. Key Responsibilities • Architect, build, and maintain complete web applications and backend services from concept through to production. • Design and implement responsive frontend interfaces, complex user flows, and internal dashboards. • Develop and manage APIs, background workers, scheduled jobs, and automated processing pipelines. • Integrate third-party APIs, LLMs (agentic workflows, tool calling), and data-ingestion systems, including authorized scraping. • Oversee cloud deployment, infrastructure monitoring, and CI/CD pipelines to ensure high system resilience. • Perform load-testing and stress-testing to preemptively address bottlenecks and scaling issues. • Maintain a focus on cost-conscious engineering, optimizing cloud, database, and AI token consumption. Requirements • Proven track record of end-to-end ownership, having personally built and shipped complete applications. • Advanced proficiency in JavaScript / TypeScript and modern frontend frameworks (React, Next.js). • Strong backend experience with Python, Node.js, or similar technologies. • Deep understanding of relational database design (PostgreSQL) and event-driven architectures (Redis, Queues). • Experience with major cloud platforms (AWS, GCP, or Azure) and containerization (Docker). • Ability to work independently in a fast-paced environment, identifying the simplest viable technical approach to solve complex problems. • Excellent communication skills with the ability to explain technical tradeoffs and risks to non-technical stakeholders. Nice-to-Haves • Experience building AI-powered products or sophisticated data platforms. • Familiarity with vector databases (Elasticsearch/OpenSearch) and NoSQL environments. • Background in developing SaaS applications, marketplaces, or high-volume search tools. • Experience with browser automation and large-scale data extraction Benefits 💰 Competitive salary 🌎 Fully remote work environment 🚀 Career growth opportunities 📈 Long-term stability 🤝 Collaborative and supportive team culture