Principal Fullstack Engineer

Location: Fully remote, EMEA timezone Start date: ASAP Languages: Fluent English is mandatory Industry: Cloud Computing / AI European SaaS Pragmatike is recruiting on behalf of a European deep-tech company developing a decentralized, energy-efficient alternative to traditional cloud providers. Their platform operates on distributed bare-metal infrastructure with advanced automation, delivering sovereign, high-performance compute for modern workloads. Professional Background: Were looking for a Senior Fullstack Engineer (Staff / Principal level) with strong expertise in React and Node.js, and a proven track record of leading or executing migrations from monolithic architectures to modern Single Page Applications (SPA). This role goes beyond hands-on delivery: technical leadership, architectural ownership, and mentorship are key. Startup or hyper-growth experience is a strong plus. Autonomy, ownership, and the ability to make pragmatic technical decisions are essential. Your Responsibilities: Lead the design and development of scalable fullstack applications using React (SPA) and Node.js. Own and drive monolith-to-SPA migration strategies, including incremental decomposition, API design, and frontend re-architecture. Define and enforce frontend and backend architecture, patterns, and best practices. Act as technical lead for the fullstack domain: reviewing designs, mentoring engineers, and setting engineering standards. Collaborate closely with product, DevOps, and platform teams to align application architecture with infrastructure constraints. Design and maintain backend services and APIs (REST/GraphQL) with a focus on performance, reliability, and maintainability. Improve application observability, performance, and resilience. Participate in hiring, onboarding, and growing senior engineering talent. Drive technical decision-making with a long-term platform mindset. What You Bring: Senior-level experience (Staff / Principal) as a Fullstack Engineer. Strong expertise in React and modern frontend ecosystems (SPA architecture, state management, performance optimization). Strong experience with Node.js backend development and API design. Proven hands-on experience migrating monolithic applications to SPA or modular architectures. Ability to lead technical initiatives end-to-end. Solid understanding of software architecture, system design, and trade-offs. Experience working in fast-moving, product-driven environments. Excellent communication skills and ability to influence technical direction. Nice To Have: Previous experience as Tech lead or project management role.Experience with microservices or modular backend architectures. Familiarity with cloud-native environments and modern CI/CD pipelines. Experience collaborating closely with DevOps or infrastructure teams. Prior experience in deep-tech, cloud, or infrastructure-heavy products. Exposure to performance-critical or high-scale systems. Why Join Us: Our client is shaping the future of cloud infrastructure through decentralization and advanced automation. Their mission is to deliver a sovereign, energy-efficient, high-performance alternative to traditional cloud providers. Youll join a highly technical environment where architecture matters, leadership is valued, and your decisions will directly shape the evolution of a complex, ambitious platform. Pragmatike is dedicated to a fair, transparent, and inclusive recruitment process. We ensure that no applicant is discriminated against based on age, disability, gender, gender identity or expression, marital or civil partner status, pregnancy or maternity, race, religion or belief, sex, or sexual orientation. In accordance with the General Data Protection Regulation (GDPR), your personal data will be processed lawfully, fairly, and securely. We collect and use your personal data solely for recruitment purposes, including sharing it with our client(s) for employment consideration. You have the right to request access, correction, or deletion of your data at any time. We are committed to maintaining the confidentiality and security of your information throughout the recruitment process.