We are looking for a Senior Full Stack Developer to help build scalable web applications, improve system performance, and deliver a seamless user experience.
The role sits at the intersection of technical architecture, backend performance, and user-centric feature development. It suits a developer with a balanced technical and product mindset.
Tech stack: SvelteKit · TypeScript · Node.js · PostgreSQL · AWS · SST · Vitest · Playwright
WHAT YOU’LL DO Technical Architecture & Development Design and implement scalable, efficient features with a focus on maintainable architecture
Lead technical discussions and make strategic architectural decisions for new and existing features
Build full-stack solutions with SvelteKit, TypeScript and Node.js, keeping code clean, modular and optimized
Balance user experience and technical performance to deliver high-quality solutions
System Maintenance & Debugging Diagnose and resolve technical issues to keep the system stable and minimize downtime
Implement robust logging, error handling and monitoring to catch issues proactively
Refactor and optimize code for performance and scalability, especially on PostgreSQL and AWS
Infrastructure & Deployment Manage and optimize AWS infrastructure with SST, keeping it scalable and reliable as usage grows
Build and maintain CI/CD pipelines for automated testing and deployment
Streamline deployment processes for smooth rollouts with minimal user disruption




AI-Driven Solutions Design and build AI-powered tools and features that automate workflows and improve the user experience
Experiment with new technologies to integrate AI solutions that scale manual processes and expand product capabilities
YOU’LL ALSO Code Quality & Standards Lead code reviews focused on edge cases, security and performance
Set and enforce coding standards, including error handling, input validation and security best practices
Ensure high test coverage with Vitest and Playwright, including edge cases and exceptional scenarios
Mentor junior developers and foster continuous learning
Security & Compliance Apply secure coding practices in line with OWASP guidelines
Regularly assess and fix security vulnerabilities
Respond quickly and effectively to security incidents
Performance & Innovation Monitor system and database performance, identifying and resolving bottlenecks
Stay current with new tools and technologies and propose improvements to the platform
Collaboration & Client Support Work closely with product managers and designers to align development with business goals
Provide technical insights and answers on client queries and requirements
Collaborate with clients and stakeholders to resolve technical issues
Contribute to a collaborative team culture built on knowledge sharing
#J-18808-Ljbffr

📌 Full Stack Developer (Barcelona)
🏢 Pack
📍 Barcelona