Fullstack Developer (Heavy Backend Focus) - NestJS & PostgreSQL

Further Details

This private sector opportunity in Madrid, Spain, calls for a skilled Fullstack Developer specializing in backend development, utilizing NestJS and PostgreSQL. The role involves designing and implementing scalable backend systems, optimizing relational schemas, and building robust APIs. The successful candidate will also be involved in frontend development using React, applying modern engineering principles and AI tools to accelerate workflow. This is a key position for someone who thrives in a dynamic, fast-paced environment. Street Smash Burgers, a thriving international brand, provides a structured platform for career advancement, continuous training, and attractive benefits, making it an excellent environment for professional development and growth.

Street Smash Burgers is Hiring a Fullstack Developer

JR Spain Client is actively recruiting a Fullstack Developer with a strong backend specialization to join their dynamic team in Madrid, Spain. This role is integral to developing and enhancing the technology behind Street Smash Burgers' growing international presence. The ideal candidate will possess a deep understanding of backend development principles and a passion for creating seamless user experiences.

The position emphasizes end-to-end feature ownership, from intricate data modeling to intuitive interface design. You will employ robust engineering practices and leverage advanced AI tools to optimize productivity without compromising on quality. This is an excellent opportunity for a driven professional to contribute to an innovative and expanding company within the competitive private sector.

• Job Title: Fullstack Developer (Heavy Backend Focus)
• Location: Madrid, Spain
• Key Technologies: NestJS, PostgreSQL, React, TypeScript
• Company Sector: Private
• Career Growth: Continuous training and real career progression opportunities
• Benefits: Competitive compensation package and company benefits

Skills

• Proficiency in Node.js, TypeScript, and NestJS
• Strong command of PostgreSQL and advanced SQL skills, including schema design and query optimization
• Hands-on experience with SOLID principles, design patterns, Clean Architecture, and testing methodologies
• Proven ability in building interfaces with React
• Demonstrated autonomy, pragmatism, and excellent communication skills
• Professional working proficiency in English
• Experience with PostgREST
• Familiarity with Next.js or Vite
• Experience utilizing AI coding tools (e.g., Claude Code) in daily workflows

Duties and Responsibilities:

• Design and build scalable backend systems using patterns like Repository, Factory, CQRS, and Dependency Injection
• Design relational schemas and optimize complex queries in PostgreSQL and PostgREST
• Build modular, strongly typed APIs and services with NestJS
• Develop and connect clean, functional interfaces in React (Vite or Next.js)
• Utilize Claude Code and other AI tools to enhance development speed while maintaining quality
• Break down ambiguous problems, conduct research, and deliver pragmatic solutions
• Proactively ask questions and challenge ideas to find better approaches

How to apply

Interested candidates are invited to submit their applications for the Fullstack Developer position with JR Spain Client at Street Smash Burgers. Please follow the steps below to ensure your application is received and considered:

• Application Link: Visit the provided application portal via the following link to initiate your application process: https://eurojobs.com/jobs/36972604/apply
• Required Documents: While not explicitly detailed, candidates should prepare a comprehensive CV highlighting relevant experience in backend and fullstack development, NestJS, PostgreSQL, and React. Include any relevant certifications or portfolio links.
• Application Deadline: Ensure your application is submitted by the closing date of 18 December, 2026. Late applications may not be considered.
• Work Permit: Please note that an EU work permit is required for this position.
• Further Information: For detailed job specifications and company insights, refer to the full advertisement on Eurojobs.