Javascript Developer & React Developer

The candidate is an experienced tech professional with a focus on front-end and back-end engineering. He has 13 years of experience and has worked with various developer tools and methodologies. The candidate's core skills include leadership, people management, JavaScript, HTML, CSS, React.JS, React Native, TypeScript, Angular, Node.JS, Golang, Python, and Vue.JS. He also has knowledge in blockchain, ML basics, and cyber security. The candidate's responsibilities in his previous roles included team management, code review, mentoring, performance reviews, refactoring, testing, and client/product owner interaction. He has worked on projects in various industries, including e-learning, marketplace, automotive, online communication, and more. The candidate is fluent in English, Polish, and Czech.

01/2018 - Present: Lead developer at Company A

• Responsible for designing the infrastructure and developing backend and frontend features for various projects, including an e-learning app, a marketplace, and a backend generator.
• Also responsible for leading the development and technical aspects of the company, as well as creating technical and educational content in free time.

05/2021 - 01/2022: Senior software engineer (Contract) at Company B

• Worked on an online automotive industry project, focusing on frontend development using React.JS, Typescript, HTML5, and CSS3.
• Responsibilities included planning, designing, and creating experimental prototypes, developing new features, and working on performance and tech stack improvements.

11/2018 - 05/2019: Senior software developer (6M Contract) at Company C

• Worked on an online communicator project at Microsoft, primarily focusing on frontend development using React.JS, Javascript, HTML5, and CSS3.
• Responsibilities included planning, designing, and creating experimental prototypes, migrating a frontend codebase from ASP.NET + Javascript to React.js, and developing new features.

01/2018 - 04/2018: Lead developer at Company D

• Worked on a marketplace project, handling frontend development using React.JS, Javascript, GraphQL, Redux, and backend development using Node.JS, Nest.JS, PostgreSQL, Typescript, and AWS.
• Responsibilities included leading developers, designing backend architecture, implementing security measures, and developing features for frontend and mobile platforms.

09/2017 - 03/2018: Senior full-stack javascript developer at Company E

• Worked on a sport app project, developing frontend features using React.JS, Javascript, HTML5, and CSS3 for web and smart TVs.
• Responsibilities included creating the app for different TV devices, manually testing apps, and developing frontend features.

01/2017 - 09/2017: Senior full-stack javascript developer at Company F

• Worked on client UI and internal app projects, using React.JS, Redux, Typescript for the client UI and Angular, Typescript for the internal app.
• Responsibilities included creating automatic tests and developing frontend features.