TL;DR

Fullstack Developer Senior (Fullstack): Building and maintaining scalable backend services and responsive frontends using Node.js, Next.js, React, Vue, and Angular with an accent on microservices architecture, event-driven systems, and security compliance. Focus on designing robust APIs, optimizing performance, and applying clean code principles in a fast-paced startup environment.

Location: Hybrid (Valencia, Madrid, Spain)

Salary: €35,000 - €51,750 OTE gross annual

Company

%hirify_global% is a fast-growing, 70-person startup based in Madrid focused on creating a next-generation platform for freelance teams.

What you will do

Architect, build, and maintain scalable backend services and APIs using Node.js (NestJS) and Next.js.
Design and implement microservices and event-driven pipelines (Kafka) ensuring high performance and resilience.
Collaborate with UI/UX designers to develop responsive frontends with React, Vue, or Angular integrated with RESTful and GraphQL APIs.
Optimize application performance including load times and bundle sizes.
Champion Agile methodologies, CI/CD best practices, and automate workflows using AWS services.
Apply Hexagonal Architecture, Domain-Driven Design, Clean Code, and SOLID principles to maintain code quality and security.

Requirements

Must have 4+ years of professional development experience with real product work.
Bachelor’s degree in Computer Science, Telecommunications, Mathematics, or related STEM field.
Proven experience with fullstack development using Node.js, Next.js, Vue/Angular, RESTful APIs, microservices, and event-driven systems.
Strong understanding of web security best practices including authentication and authorization (JWT, OAuth).
Experience with quality and security tools such as SonarQube and Kiuwan.
Comfortable working in a fast-paced startup environment with proactive communication and collaboration skills.

Nice to have

Experience shipping features at other product-focused companies.

Culture & Benefits

Work in a rapidly growing international startup with a high-performance culture.
Ambitious professional development plans and a strong team culture.
Hybrid work model with office locations in Valencia and Madrid.
Perks including wellness programs, gym access, English classes, and medical insurance.
Office amenities like organic fruit and free caffeine.

Hiring process

Initial cultural fit chat with People & Culture team.
Case study and technical skills interview with Product team members.
Meet additional team members for skillset and cultural fit evaluation.
Final conversation with CEO to discuss vision and expectations.