Principal Fullstack Engineer

Pragmatike

full-time

Posted on: 1/5/2026

Location Type: Remote

Location: Spain

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About the role

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.

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.

Benefits

Tip: use these terms in your resume and cover letter to boost ATS matches.

ReactNode.jsSPA architectureAPI designRESTGraphQLperformance optimizationsoftware architecturesystem designmonolithic applications

leadershipmentoringcommunicationinfluencecollaborationtechnical decision-makingproblem-solvingteamworkorganizational skillsadaptability