Joseph Z. Email & Phone Number

Poznań, Wielkopolskie, Poland

- Worked on the development of the e-commerce platform while performing code reviews, scrum planning, writing technical documentation for newcomers, and managing the tickets on the board.- Designed and built robust REST APIs with Python-Django back-end systems by following the Serverless Architecture based on AWS Lambda, S3, API Gateway, and SQS.- Developed pixel-perfect web and mobile frontend of LMS which processes data visualization and model using TypeScript, React, GraphQL, Node.js, Postgres, MongoDB, and Material UI.- Spearheaded the transition of social web application from the old Angular application to a new React/Next.js app.- Implemented microservices' architecture to upgrade the efficiency of the CRM system by 40%.- Led marketplace Android and iOS applications using React Native from scratch with develop team.- Mentored junior team members through pair programming to boost the team's performance.

Poznań, Wielkopolskie, Poland

- Led the development of a website for a traveling service as a Lead UI Engineer, using React, TypeScript, React-query, and Node.js, focusing on enhancing user experience and site performance.- Developed and maintained web applications for internal teams built with Vue.js, PHP/Laravel, Typescript, NodeJS, Python, Golang, and Nest.js.- Developed the front end for a PaaS solution that connects clients with insurance providers using ReactJS and Redux.- Developed serverless web applications with Amazon Web Services like AWS Lambda, DynamoDB, S3, Beanstalk, SNS, EC2, and so on.- Led development of complex key features and moved repositories to the Nx Monorepo.- Participated in Mobile Development and created Android version of existing iOS app using React Native.- Created the Desktop App for browsing AWS S3 files using Electron.- Promoted experience with Kubernetes, Docker, Firebase, and TDD environment.

Poznań, Wielkopolskie, Poland

Sligo, County Sligo, Ireland

- Designed and developed Back-end RESTful APIs using Node.JS, Express, Nest.js, PHP, Laravel, Python, Django, Flask, MongoDB, PostgreSQL, MySQL, Redis, AWS, and Firebase.- Translated Figma and Adobe XD designs to pixel-perfect and fully responsive designs using JavaScript, TypeScript, and its libraries React, Next, Vue, Angular and HTML, CSS, SCSS, and LESS.- Migrated a healthcare web application from the LAMP stack application to a modern MERN stack app.- Implemented real-time communication functionalities using Web Socket technology.- Implemented Stripe API integration with payment flow, trial periods, monthly and yearly subscriptions, and withdrawals.- Created automated testing framework in Jest, Mocha + Chai + Simon for unit testing and e2e UI testing.- Implemented CI/CD pipelines in each step of the development cycle which improved integration and delivery towards agile methodologies.

Sligo, County Sligo, Ireland

- Transformed design mock-ups into HTML5/CSS3 layouts and created Responsive Web libraries by utilizing the main styling tools and stuffs in the agile development team.- Supported and improved the UI of internal tools to manage the backend of a big Scandinavian telecommunication provider using JavaScript, Angular, and React.- Participated in the development of e-commerce and CRM systems with WordPress and OOP, MVC structure, Laravel, SQL, and Git and followed Pixel Perfect design and implementation.- Cooperated with the UI/UX department to create a new look and feel for the website, implemented changes with jQuery library extensions, Ajax & CSS.