Amir Es.

Senior Frontend Engineer @Kollex

Berlin, DE

Kollex, a Berlin-based joint venture with Coca-Cola, Bitburger, Krombacher and ChefCulinar, offers a digital platform that modernizes and streamlines beverage orderingfor wholesalers and restaurateurs, improving efficiency and transparency- Led migration from legacy system (GFGH) to a new, efficient platform- Implemented GraphQL middleware to facilitate seamless interaction betweenbackend microservices and databases, enhancing frontend usability- Developed a comprehensive, reusable component library for frontend applications,including thorough testing and documentation for UI team use- Integrated GraphQL and REST APIs for flexible access across mobile and webapplications- Utilized Domain-Driven Design and micro frontend technology to createreusable internal packages- Established a CI pipeline with over 90% unit test coverage and 100% integration testcoverage for all endpoints, incorporating Cypress for end-to-end testing- Created a public JavaScript library with various packages for analytics, tracking, andshared logic functions- Developed a marketing website using Gatsby and Storyblok, providing an easy-to-use platform for the marketing team to create and manage content- Built internal tools for A/B testing and event tracking to support product andmarketing campaigns- Maintained a synchronized system for managing large datasets across partners likeChef and Krombacher- Collaborated with designers, PMs, backend engineers, and other team membersthrough kickoff meetings, daily stand-ups, retrospectives, and planning sessions- Configured AWS Amplify, Cognito, S3, and other tools, streamlining the releaseprocess. Also, Implemented Docker to containerize frontend applications and AWSAppSync, streamlining the release and development processes- Developed state management solutions using Redux and MobX for both mobile andweb applications.

University of Tabriz

Bachelor of Science (BS), Information Technology - Multimedia