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