We are looking for a Full Stack Product Engineer to help build and evolve the user-facing product functionality used to configure, manage, and monitor integrations and connected business workflows. 

This is a TypeScript-first full stack role working across both frontend and backend development. The primary technologies are Angular on the frontend and NestJS on the backend. 

The role is currently somewhat frontend-heavy due to ongoing modernisation work, but the intended long-term balance is full stack ownership across frontend and backend concerns. 

This is not a pure visual frontend role, nor a backend-only platform role. You will work on product functionality end-to-end: user interfaces, application logic, backend services, API integration, maintainability, and product behaviour. 

You will join a small, pragmatic engineering team where engineers are expected to take ownership, communicate clearly, collaborate across locations, and help shape practical solutions. 

Key Responsibilities 

• Develop and maintain product functionality for configuring, managing, and monitoring integration workflows.  
• Build and improve Angular frontend features, application flows, and user-facing product behaviour.  
• Develop and maintain backend services and APIs using NestJS and TypeScript.  
• Work across frontend and backend boundaries to deliver features end-to-end.  
• Help modernise legacy code and  reduce technical debt while continuing to deliver product functionality.  
• Improve maintainability, scalability, and developer experience in the codebase.  
• Debug and troubleshoot product behaviour across frontend, backend, and API boundaries.  
• Collaborate with a small engineering team to clarify requirements, make tradeoffs, and shape solutions.  
• Contribute to pragmatic engineering standards, architecture discussions, and development workflows 
• Use modern development tooling, including AI-assisted tools where useful and appropriate.

Candidate Profile 

Required Qualifications 

• Professional experience with TypeScript.  
• Experience building frontend applications with Angular.  
• Experience building backend services or APIs using NestJS or similar Node.js frameworks.  
• Comfortable working across frontend and backend concerns in a full stack environment.  
• Practical understanding of APIs, data flow, validation, and product-facing service logic.  
• Good understanding of REST APIs.  
• Familiarity with JSON; XML. Familiarity is helpful given the integration domain.  
• Ability to build maintainable, readable, and scalable application code.  
• Product-minded engineering approach, with attention to user workflows and usability. 
• Ability to collaborate effectively in a small team and communicate clearly across locations.  
• Good English communication skills, with willingness to continue improving toward a fully professional level 
• Based in the Barcelona area and willing to commute to the office in Barcelona 
• Must have the legal right to live and work in Spain, preferably on a permanent basis 

Preferred Qualifications 

• Experience with Nx in a monorepo environment.  
• Experience with TypeORM or similar ORM libraries.  
• Experience with Java using Spring Framework 
• Experience working with GitLab and GitLab CI/CD pipelines.  
• Experience with component-based frontend architecture.  
• Experience contributing to frontend modernisation or refactoring initiatives.  
• Experience working on product functionality involving workflows, configuration, monitoring, or connected systems.  
• Familiarity with observability, logging, debugging, and production support for product-facing applications.  
• Experience in a startup, scale-up, or small-team engineering environment.  
• Comfortable using AI-assisted development tools responsibly as part of a modern engineering workflow.  

Behavioural Competencies 

• Product-minded and ownership-driven.  
• Pragmatic in balancing delivery speed, maintainability, and technical quality.  
• Comfortable working across frontend, backend, and product concerns.  
• Collaborative and communicative, especially in a small distributed team.  
• Able to clarify requirements, identify gaps, and propose practical solutions.  
• Motivated to improve existing systems rather than only build new features.  
• Comfortable wearing multiple hats in a growing engineering organisation.  
• Quality-minded without being rigid or overly process-dependent.  
• Interested in integration-oriented product problems and connected business workflows.  

What We Offer 

• Competitive salary 
• Private health insurance 
• Career development program, including access to learning resources such as Udemy courses 
• The opportunity to work on a real product platform with meaningful full stack and product-engineering challenges 
• Exposure to product engineering themes such as observability, platform evolution, and AI-enabled product development 
• A collaborative engineering environment with room to learn and grow 

Development Opportunity 

This role offers the opportunity to build hands-on experience in full stack engineering, frontend platform development, product-facing services, observability, and AI-enabled product evolution. The successful candidate will contribute to the future development of the Maicell platform while growing toward broader technical and product-engineering responsibilities over time. 

Potential future growth paths may include: 

• Senior Full Stack Engineer 
• Frontend Platform Engineer 
• Product Engineer 
• Backend Developer 
• Solution Architect