Felix Mangold

- Built and maintained 10+ frontend apps (SPA, PWA, Node.js) across 3 teams - Developed backend microservices for an edtech platform - Implemented OAuth 2.0 auth and integrations with Stripe, Sendgrid, S3 - Created 5 services with 10+ controllers each - Led architecture and tech style guide for company-wide frontend - Built a shared UI kit and core engine used by 4+ products - Created high-load components (e.g., Gantt chart with 2M+ rows) - Migrated APIs from REST to GraphQL

- Helped build and improve e-commerce apps using Next.js and headless CMSs like Strapi and Contentful - Built a furniture management tool with Firebase and Vue - Customized Shopify and HubSpot for content and marketing workflows - Created reusable React components, speeding up mobile dev by 20–30% - Built 20+ components for data visualization - Worked in an R&D lab on prototypes, A/B tests, and user feedback tools

- Developed B2B SPA with Backbone.js which reduced company processes time by 50% - Created more than 5 reusable local packages which reduced the time to develop a web application in 4x - Design suggestions and new features implementation

- Contributed as a Back-End Developer, focusing on enhancing the server-side functionality of web applications. - I used jQuery to enhance client-side interactivity and efficient data manipulation. - Gained experience in back-end frameworks, Laravel and WordPress

- Joined as a Front-End Developer, focusing on crafting interactive and user-friendly interfaces. - Contributed to custom-built real estate solutions in WordPress