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Michał – React, Typescript, JavaScript, experts in Lemon.io

Michał

From Poland (GMT+2)

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Full-stack Web DeveloperSenior
Hire developer
7 years of commercial experience
Consulting services
E-commerce
Edtech
Telecommunications
Rental
Platforms
Lemon.io stats
2
projects done
984
hours worked
Open
to new offers

Michał – React, Typescript, JavaScript

Michał is an experienced Full-Stack Developer with over 5 years of experience. His primary technology stack is React, Redux, JavaScript, TypeScript, Node.js, SQL, and MongoDB. He has experience providing solutions for clients, leading teams, mentoring, creating architecture, and cloud computing. But Michał is not only technically strong but also an excellent companion and team player, very responsible, and will perfectly support your team, as demonstrated by his previous project with lemon.io.

Main technologies
React
6 years
Typescript
3 years
JavaScript
6 years
Node.js
6 years
Next.js
3 years
Additional skills
Java
Python
Golang
Unit testing
AWS
Microsoft Azure
Styled-components
Spring
Redux Thunk
Redux
GraphQL
Jest
Playwright
Cypress
Storybook
Ready to start
ASAP
Direct hire
Potentially possible

Experience Highlights

Frontend Tech Lead / Senior Full-Stack Developer
Jul 2023 - Nov 20233 months
Project Overview

Telecommunication services company that operates mobile and internet services. I was working on application for settlements between operators.

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Responsibilities:
  • Improved frontend code base;
  • Developed multiple end-to-end functionalities;
  • Redesigned existing component library.
Project Tech stack:
React
JavaScript
Typescript
Java
Spring Boot
Senior Full-stack Developer
Dec 2022 - Jul 20236 months
Project Overview

A platform for donors, students, and colleges to manage scholarships in the USA.

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Responsibilities:
  • Refactored code to use reusable components;
  • Planned and developed new features - from business logic to fullstack implementation;
  • Added combined SSR data fetching with client pagination and revalidation;
  • Wrote integration and e2e tests;
  • Refactored pages to be responsive.
Project Tech stack:
Next.js
React
Typescript
Python
pytest
Playwright
Pydantic
SQLAlchemy
GraphQL
Apollo GraphQL
FastAPI
Senior Full-Stack Developer
Jun 2022 - Jan 20237 months
Project Overview

One of the largest survey applications in the UK, used mainly by British colleges with over 300 different organizations.

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Responsibilities:
  • Implemented parameters and pre-population functionality for surveys;
  • Implemented adding bulk users;
  • Implemented downloading responses and users in CSV format;
  • Implemented the ability to change languages;
  • Refactored the existing front end;
  • Debugged and resolved the application issues;
  • Wrote unit and e2e tests.
Project Tech stack:
Node.js
JavaScript
Typescript
AWS
e2e testing
Next.js
Unit testing
React
Senior Front-End Developer
Mar 2022 - Jul 20224 months
Project Overview

One of Sweden's largest fuel companies. The project was for both private and business clients. It was an e-commerce platform to rent cars, pay for fuel, and car wash.

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Responsibilities:
  • Implemented UI components to be served by the backend page builder;
  • Debugged and resolved the application issues;
  • Wrote unit tests.
Project Tech stack:
Typescript
JavaScript
Styled-components
Microsoft Azure
React
Frontend Tech Lead / Senior Full-Stack Developer
Jun 2020 - Feb 20221 year 8 months
Project Overview

Telecommunication services company that operates mobile and internet services. I was working on two projects: the Dunning application and an invoice correction application. The Dunning application was used by company workers to manage users' accounts in both manual and automatic ways. The invoice correction app was also used by company workers to create invoice corrections.

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Responsibilities:
  • Created front-end architecture for several projects;
  • Built frontend component library - advanced table, which was integrated with the backend, allowed users to display, filter, order, paginate, modify, and reorder data;
  • Debugged and resolved the application issues;
  • Wrote unit and integration tests;
  • Integrated with different providers.
Project Tech stack:
React
JavaScript
Typescript
Java
Spring Boot
Senior Full-Stack Developer
Dec 2016 - Jul 20203 years 6 months
Project Overview

Working as a freelancer for multiple companies, mainly as a consultant.

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Responsibilities:
  • Redesigned the existing architecture;
  • Suggested optimizations for clients;
  • Was responsible for the code reviews;
  • Conducted the developer's training;
Project Tech stack:
Node.js
Typescript
JavaScript
React

Education

2022
Telecommunication in Transport
Engineer's Degree

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