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: Svelte Kit · Type Script · Node.Js · Postgre SQL · AWS · SST · Vitest · PlaywrightWHAT YOU’LL DOTechnical Architecture & Development Design and implement scalable, efficient features with a focus on maintainable architectureLead technical discussions and make strategic architectural decisions for new and existing featuresBuild full-stack solutions with Svelte Kit, Type Script and Node.Js, keeping code clean, modular and optimizedBalance 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 downtimeImplement robust logging, error handling and monitoring to catch issues proactivelyRefactor and optimize code for performance and scalability, especially on Postgre SQL and AWS Infrastructure & Deployment Manage and optimize AWS infrastructure with SST,



keeping it scalable and reliable as usage growsBuild and maintain CI/CD pipelines for automated testing and deploymentStreamline 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 experienceExperiment with new technologies to integrate AI solutions that scale manual processes and expand product capabilities YOU’LL ALSOCode Quality & Standards Lead code reviews focused on edge cases, security and performanceSet and enforce coding standards, including error handling, input validation and security best practicesEnsure high test coverage with Vitest and Playwright, including edge cases and exceptional scenariosMentor junior developers and foster continuous learning Security & Compliance Apply secure coding practices in line with OWASP guidelinesRegularly assess and fix security vulnerabilitiesRespond quickly and effectively to security incidents Performance & Innovation Monitor system and database performance, identifying and resolving bottlenecksStay 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 goalsProvide technical insights and answers on client queries and requirementsCollaborate with clients and stakeholders to resolve technical issuesContribute to a collaborative team culture built on knowledge sharing #J-18808-Ljbffr

📌 Full Stack Developer (Barcelona)
🏢 Pack
📍 Barcelona