Senior Fullstack Developer (Node.js, Next.js, React)

TL;DR

Senior Fullstack Developer (Node.js, Next.js, React): Building and optimizing a marketplace using the latest technologies with an accent on scalable backend services, microservices architecture, and high-quality frontend integration. Focus on applying Hexagonal Architecture, DDD, Clean Code, and ensuring performance, quality, and security in a fast-paced startup environment.

Location: Hybrid (Valencia or Madrid, Spain)

Salary: €35,000–€45,000 fixed annual salary

Company

hirify.global is a rapidly growing startup based in Madrid, focused on building a leading community and platform to connect companies with freelance teams globally.

What you will do

• Architect, build, and maintain scalable backend services in Node.js (NestJS) and server-side applications with Next.js.
• Design and implement microservices architectures and event-driven pipelines (Kafka).
• Collaborate with UI/UX designers to build responsive frontends using React, Vue, or Angular, integrating with RESTful and GraphQL APIs.
• Optimize load times, bundle sizes, and user interactions to ensure high performance and quality.
• Champion Agile and DevOps practices, managing GitLab workflow, writing tests, and automating CI/CD processes (AWS).
• Apply Hexagonal Architecture, Domain-Driven Design (DDD), Clean Code, and SOLID principles to ensure a maintainable codebase.
• Implement authentication/authorization (JWT, OAuth) and integrate code-quality/security tools (SonarQube).

Requirements

• 4+ years of professional development experience in product-focused companies.
• Bachelor’s degree in Computer Science, Telecommunications Engineering, Mathematics or a closely related STEM field.
• Proven experience building fullstack applications with Node.js, Next.js, Vue/Angular, and designing RESTful APIs and microservices.
• Hands-on experience with Hexagonal Architecture, DDD, SOLID, and Clean Code practices.
• Familiarity with AWS services (EC2, S3, CloudFront, Lambda).
• Strong understanding of web security best practices and experience with quality/security tooling.
• Highly proactive, excellent communicator, and team player comfortable working in a lean, agile environment.

Culture & Benefits

• Be part of a rapidly growing, internationally expanding startup.
• Ambitious professional development plan to help you reach your full potential.
• Enjoy an unbeatable team culture.
• Take advantage of our hybrid full flex methodology with offices in Valencia and Madrid.
• Flexible compensation options.
• Organic fruit, free caffeine and theine at the office.

Hiring process

• Round 1: Cultural Fit chat with the People & Culture team.
• Round 2: Case Study & Technical Skills deep dive with the Product team.
• Round 3: Meet additional team members to explore skillset and cultural fit.
• Final check: CEO Chat with Héctor to discuss hirify.global’ future and your vision.