Karolina M.

Karolina M.

Senior Fullstack Developer

Warsaw, Poland
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About Me

Karolina is a web application developer with over four years of experience. As a full-stack developer, Karolina can build both the front end and back end of an application. Recently, Karolina has been focused on development projects with JavaScript, React, and Node.js. However, what remains constant is her work ethic: the quality of the code she develops is paramount.

Front-end Full-stack HTML5 Typescript React Node.js Web CSS Microservices Redux Express.js Swagger Git Databases PHP 7

Work history

Modern Animal Inc
Full-stack React Developer
2021 - Present (3 years)
Remote

  • Implemented new features for a veterinarian platform that make managing animal documentation easier using React and TypeScript.

  • Conducted small improvements and maintenance for a React Native application—iOS and Android versions—for the veterinary platform clients.

  • Improved and maintained a PDF documents generator based on React PDF library that allows veterinarians to print full animal health documentation.

React Node.jsHTMLJavaScriptCSSReact NativeJestFront-end Development WebpackFigma
Secure Staffing
React Developer
2020 - 2022 (2 years)
Remote

  • Moved the old Angular code to the modern React application.

  • Fixed bugs and implemented new features according to specifications in Asana.

  • Deployed features very quickly, and they brought new values to the customers.

  • Used many automated tools to improve code quality in React and PHP.

  • Charged with implementing features from end to end, as a full-stack developer.

React Laravel Web Architecture MySQLTypescriptPHP 7 CSS3npmVisual Studio Code (VS Code) PHPREST APIs Front-end Next.jsGithubCSSWebSockets GitElasticsearch WebJavaScriptReduxHTMLAngularAPIsHTML5Full-stack SQLFront-end Development WebpackRelational Databases Databases
Billflow
React and Testing Developer
2020 - 2021 (1 year)
Remote

  • Developed new features for the dashboard and embeddable React application for no-code Stripe billing integration.

  • Fixed and solved issues for the product clients using Intercom.

  • Developed integration tests based on Cypress for React application.

React Node.jsCypressFront-end TypescriptMicroservicesCSS3npmPostgreSQLVisual Studio Code (VS Code) REST APIs Next.jsGithubCSSStripe Payments GitAgile software developmentWebJavaScriptReduxHTMLAPIsHTML5JestQA TestingFront-end Development WebpackFigmaDatabases
Madiff
Senior Full-stack Developer
2018 - 2021 (3 years)
Remote

  • Created a platform that integrates many products developed by other teams in the company.

  • Developed back-end microservices in Node.js and TypeScript. Integrated them with AWS products (SQS, SMS, ES, and so on).

  • Made a complicated reports API based on partitioned tables in a PostgreSQL database.

  • Built multiple React/Redux applications and libraries.

  • Constructed a library that enables connections to back-end services and React applications via WebSockets.

  • Wrote unit tests and improved code quality using automated tools (such as ESLint, TSLint, TypeScript, and Flow).

  • Refactored and updated old React and Node.js applications to new library versions.

MicroservicesAmazon Web Services (AWS) TypescriptNode.jsReduxReact JavaScriptFront-end Express.js CSS3npmGraphqlPostgreSQLAmazon S3 (AWS S3) AWS Lambda Visual Studio Code (VS Code) Amazon Cognito User Pools Amazon Simple Queue Service (SQS) AWS AmplifyREST APIs Next.jsGithubCSSNestJS Object-oriented Programming (OOP) GitAmazon DynamoDB Agile software developmentWebMongoDBHTMLnoSQLAPIsHTML5Full-stack SQLMUI (Material UI) JestFront-end Development WebpackRelational Databases DatabasesCloudTypeORMAmazon RDS
StepStone Services
Software Engineer
2017 - 2018 (1 year)
Remote

  • Created a React/Redux application used by thousands of users every day.

  • Developed microservices in PHP that were connected to a Microsoft SQL database and RabbitMQ.

  • Built integration tests in a framework based on Selenium.

  • Created ready-to-use, React-based components that were meant to be used by other teams in the company.

  • Constructed Git repositories and build plans in a Bamboo-based setup and management.

MicroservicesAdobe ColdFusion PHPTypescriptNode.jsReact JavaScriptFront-end Express.js SwaggerPHP 7 CSS3jQuerynpmGraphqlPostgreSQLAmazon S3 (AWS S3) AWS Lambda Visual Studio Code (VS Code) REST APIs GithubCSSObject-oriented Programming (OOP) WebSockets GitWebReduxAmazon Web Services (AWS) HTMLAPIsHTML5Full-stack SQLJestFront-end Development WebpackRollup.js Relational Databases DatabasesCloud
4 Medicine
Full-stack Developer
2015 - 2017 (2 years)
Remote

  • Contributed to the development of an MVC PHP application that includes complicated algorithms and reports.

  • Prepared MySQL database architecture and migrations.

  • Created simple React components that replaced legacy jQuery code.

JavaScriptPHPFront-end Express.js PHP 7 CSS3jQuerynpmGraphqlPostgreSQLVisual Studio Code (VS Code) REST APIs GithubCSSGitWebReduxHTMLAPIsHTML5Full-stack SQLMUI (Material UI) Front-end Development Relational Databases Databases
RoarEstimates LLC
Full-stack React and Node.js Developer
Present (2024 years)
Remote

  • Implemented authorization logic and user account management into a React application.

  • Managed user account data in an Express application and MongoDB.

  • Provided expertise on Stripe payment integration options.

Next.jsNode.jsReact MongoDB Atlas JavaScriptCSSHTML5Stripe Payments Minimum Viable Product (MVP) Front-end Development WebpackFigmaREST APIs
Motive Biosciences Inc. dba MotiveBio
React Engineer
Present (2024 years)
Remote

  • Worked on MVP project designed for tracking woman's health app.

  • Implemented views and pages in React based on the provided designs in Figma.

  • Prepared landing page based on Gatsby following the provided design in Figma.

React CSSReduxTailwind CSSMUI (Material UI) AWS AmplifyAWS Lambda Gatsby Minimum Viable Product (MVP) Front-end Development WebpackFigmaDatabasesAmazon Web Services (AWS) Cloud
GMG GmbH
Full-stack Developer
Present (2024 years)
Remote

  • Created an MVP project for a new color management platform.

  • Rewrote the existing code to create a new application from scratch.

  • Provided a starting point for the developers' team to start working on improving and implementing new features in a React-based application.

JavaScriptHTMLCSSPHPNode.jsReact Minimum Viable Product (MVP) Front-end Development WebpackREST APIs

Portfolio

Scholly Editor

A web application that allows users to enter or upload essays and correct grammar and style. My job was to refactor the front-end part based on the old code and apply a new design. The application was developed with React.

Ogury for Publishers

An application for publishers and developers to integrate a consent-management platform (CMP) to their app. As a full-stack developer and team member, I created a lot of principal components and microservices in this big application, both on the front end (React, Redux) and back end (Node.js, TypeScript). I also supported other teams and helped with other microservices, as they did not have enough people or knowledge to implement a specific feature.

Miniature Painting Gallery

A simple React/Redux one-page portfolio application with enabled translations and a contact form. This is an old project; similar ones can be done very quickly in just a few days by using ready-to-implement tools, such as Material UI.

Simple RWD Landing Page

This is a very simple old RWD landing page that was developed in pure CSS and Vanilla JavaScript, without using React this time. Link to the code: https://github.com/kkawalec/simple-rwd-landing-page

Education

Education
Master's Degree in Church Music
The Fryderyk Chopin University of Music
2011 - 2016 (5 years)