Joan Sanfeliu Vilarrasa

Experience

• 2026 - Present

  Founder & Software Engineer @ SANFELIU

  Barcelona, Spain · Hybrid

  Custom software on AWS for companies that already run systems (ERP, CRM, online shops).

  • Applications, integrations and automations built for one specific problem, at a fixed price per feature, then a monthly support plan.
  • Own products in production: taula.ai (restaurant bookings) and Guestproof (verified guest reviews for holiday rentals).
  • Training on AI and software for schools and companies at SANFELIU Formació.

  • React
  • TypeScript
  • AWS
  • NodeJS
• 2023 - 2026

  Senior Full-Stack Engineer @ MONEI

  Barcelona, Spain · Hybrid

  High-growth payments platform processing transactions for thousands of merchants across Europe.

  • Led frontend engineering on the web platform: built accessible, high-performance React / TypeScript UIs used daily by merchants and end-users.
  • Owned the full feature lifecycle — API design with backend engineers, component architecture, UI delivery with designers, and post-launch iteration based on data.
  • Architected event-driven microservices on AWS using SNS, SQS, Kinesis, Lambda, API Gateway, AppSync, DynamoDB, Cognito, SES, Pinpoint, and S3 (Node.js).
  • Maintained and improved a large shared frontend codebase: performance profiling, refactoring, and thorough code reviews across the team.
  • Worked in cross-functional squads with product, design, and QA, following iterative, user-feedback-driven delivery cycles.

  • React
  • TypeScript
  • AWS
  • NodeJS
• 2023 - Present

  Frontend & Cloud Instructor @ TecnoCampus Mataró-Maresme (UPF)

  Mataró, Spain · Hybrid

  Subsidised web development course for the Consorci per a la Formació Contínua de Catalunya + Hub4T AWS cloud programme.

  • Design curriculum and deliver hands-on training in HTML, CSS, JavaScript, and React JS for career-changers entering the tech industry.
  • Lead AWS Cloud fundamentals course: labs on core services, guiding students to sit the AWS Cloud Practitioner certification exam.
  • Combine teaching with continuous learning — reviewing and deepening AWS knowledge each academic year.

  • HTML
  • CSS
  • JavaScript
  • React
  • AWS
• 2023 - 2023

  Full-Stack Engineer @ Bloome

  Barcelona, Spain · On site

  Sole engineer delivering two production applications from scratch.

  • Delivered two production applications — a merchant dashboard (React + AWS Cloudscape design system, integrating Holded, HubSpot & WordPress APIs) and a cross-platform mobile app (React Native / Expo).
  • Built the full serverless backend with AWS SAM / CloudFormation, Cognito, Lambda, API Gateway, S3, and RDS — owning security architecture, scalability, and CI/CD deployment.
  • Collaborated directly with product manager and designer in short iterative cycles, adapting to feedback at each sprint.

  • React
  • React Native
  • AWS
• 2021 - 2023

  Solutions Analyst — Frontend & Data @ NTT Data

  Barcelona, Spain · Hybrid

  Frontend development and data tooling for enterprise-scale clients.

  • Frontend development in React and Angular for enterprise-scale clients; participated in agile ceremonies, peer code reviews, and Jenkins-based CI/CD pipelines.
  • Built an internal ETL tool using Docker, Python, and SQL — designed data transformation logic and a dashboard for business analysts to self-serve data insights.

  • React
  • Angular
  • Docker
  • Python
  • SQL
  • Jenkins
• 2020 - 2021

  Co-Founder & Lead Engineer @ Wepelopers

  Mallorca, Spain · Remote

  Co-founded a web development agency building performant websites for SMEs.

  • Co-founded a web development agency building performant websites for SMEs using Vue / Nuxt; managed end-to-end delivery, server setup (SSL, DNS, email), and direct client relationships.

  • Vue
  • Nuxt