Roxana G. - Freelance Senior Frontend Developer

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Munich, Germany

Experience

Jan 2024 - Present

1 year 8 months

Freelance Senior Frontend Developer

RHI Magnesita

Designed and developed a high-performance internal resource management platform using React and TypeScript, optimizing dynamic data rendering and state management.
Built a React Native application to support mobile access to internal tools, enabling on-the-go project tracking for field teams.
Developed custom 2D canvas-based visualizations using Pixi.js to simulate material flows and refractory layer behaviors.
Integrated Pixi.js with React components for interactive diagrams and real-time UI updates.
Developed interactive 3D visualizations using React.js for displaying refractory product layouts and simulations, supporting engineering and sales teams with dynamic product previews.
Integrated Three.js within the React ecosystem to allow manipulation of 3D models in real-time via browser, enhancing user engagement and field configurability.
Integrated a headless CMS to enable dynamic content updates by non-technical users, reducing content deployment time by 40%.
Led AWS CloudFront optimization initiatives, improving portal load speeds by 30% globally.
Actively collaborated with cross-functional Agile teams and product owners to deliver prioritized features with a fast feedback loop.
Key Technologies: React.js, React Native, Three.js, TypeScript, Contentful CMS, AWS S3/Lambda/CloudFront, Cypress, Agile Scrum

Oct 2021 - Dec 2023

2 years 3 months

Munich, Germany

Freelance Senior Front End Developer

BMW Group

Architected and led the development of a large-scale React + Storyblok-based customer-facing application, serving thousands of users across BMW’s digital platforms.
Integrated AWS Lambda microservices and optimized CloudFront distribution to ensure scalable asset delivery.
Spearheaded the development of a customer-facing React application with Typescript, resulting in a 20% increase in user engagement.
Proficiently integrated Redux state management to enhance application state handling and ensure efficient data flow.
Worked closely with customers to gather and understand new requirements, adapting the application to meet their evolving needs.
Mantain AWS services to support frontend functionalities, including S3 for static assets, Lambda for serverless functions, and API Gateway for RESTful APIs.
Optimise and scale frontend applications by leveraging AWS CloudFront for content delivery and DynamoDB for efficient data storage.
Ensure secure integration with AWS services, following best practices for authentication and authorization.
Implement automated testing pipelines using AWS services such as AWS CodePipeline and AWS CodeBuild.
Collaborated with backend developers to create and maintain API calls using Node.js, ensuring seamless communication between the frontend and backend systems.
Utilized TypeScript to enhance code quality and maintainability, reducing the number of runtime errors by 30%.
Led the adoption of Test-Driven Development (TTD) practices, resulting in a more robust and reliable codebase.
Implemented unit tests using Jest and conducted end-to-end testing using Cypress to ensure the reliability and correctness of components and the entire application.
Utilized D3 to create and manage complex charts, providing data visualization solutions that met specific project requirements. Worked closely with UX/UI designers to implement responsive and user- friendly interfaces, contributing to a positive user experience.
Implemented client-side routing using React Router, enhancing the overall navigation experience for users.
Implement and enforce frontend security best practices, including secure coding standards, input validation, and protection against common web vulnerabilities.
Maintain comprehensive documentation for frontend architecture, codebase, and AWS integrations.
Ensure documentation is up-to-date and accessible to the development team and other stakeholders.
Key Technologies: React.js, Redux, TypeScript, AWS, Storyblok CMS, Cypress, Jest, Node.js

Jan 2019 - Oct 2021

2 years 10 months

Munich, Germany

Freelance Senior Front End Developer

Rolls Royce Group

Managed and defined standards with regard to functionality, customisations and potential performance impact.
Creating proposals for the architectural design, worked on project planning and requirements gathering.
Creating modular, responsive application using React.JS framework and Typescript.
Implemented and maintained CI/CD pipelines using Azure Pipeline, improving the efficiency of the development and deployment processes.
Used Redux for the application state management.
Involved in mantaining the server side using Express.JS.
Configured Webpack to execute pre/post-processors, tests, transpires based on build target.
Implementing unit tests using Jest.
Styling React components with styled-components library.
Implementing responsive solutions.
Designing async operations in ReactJS with Redux using Saga.
Integrating of end user authentication with OAuth 2.
Collaborating with designers to ensure designs are efficient.
Assisted in structuring the data model in CMS.
Involved in deployment process in Jenkins.
Reviewing the quality of code for the high-volume progressive web application maintaining code and design consistency across different team members.
Lead the troubleshooting and resolution of complex frontend issues, working closely with support teams and providing timely solutions.
Participate in on-call rotations to address critical issues and ensure the availability of the application.
Key Technologies: React.js, TypeScript, Styled Components, Azure Pipelines, OAuth2, Redux, Saga.

May 2017 - Jan 2019

1 year 9 months

Freelance Senior Fullstack Developer

eBay

Creating rich user interfaces using Javascript framework ReactJS.
Involved in internationalization of the application using I18next framework.
Responsible with building the server, using Express.JS and GraphQL.
Responsible with creating custom reusable React components.
Reviewing the quality of code for the high-volume progressive web application maintaining code and design consistency across different team members
Developing browser extension with ReactJS with Redux architecture using Typescript.
Used React-Router to turn application into Single Page Application.
Experience working with CSS preprocessors like LESS, SASS.
Maintained states in the stores and dispatched the actions using Redux.
Writing a polyfill for browser extension’s API’s to be compatible with 3 different browsers (Chrome, Firefox, IE11) using Typescript.
Worked in Node environment using NPM, Yarn, Grunt, Gulp.
Implementing GraphQL, on the server side, for data fetching.
Configured Webpack to execute pre/post-processors, tests, transpires based on build target.
Involved in writing build scripts using Gulp.
Designing async operations in ReactJS with Redux using Saga.
Creating custom components with a complex functionality to match client’s requirements.
Providing support for application written in ExtJS.
Utilised MVC principals to ensure a clean architecture.
Maintained close communication with BE team to deliver correct APIs.
Followed Agile development and consistently delivered new features on time during sprints.
Communicated updates in daily scrum meetings using JIRA software.
Maintaining documentation of technical designs.
Worked with Jasmine and Jest unit test framework to write unit tests for JavaScript and Typescript code.
Understanding of cross-browser issues and capabilities.
Key Technologies: React.js, Redux, GraphQL, TypeScript, Webpack, Node.js, Gulp, Redux-Saga, Jasmine, Jest, ExtJS

Feb 2016 - May 2017

1 year 4 months

Bucharest, Romania

Front End Developer

Ixia

Front End developer at a company that provides security solutions and applications across physical and virtual networks for enterprises, service providers and network equipment manufacturer.
Built custom, highly interactive components tailored to specific client requirements and business logic.
Provided maintenance and support for a legacy ExtJS codebase during migration phases.
Applied MVC principles to ensure clean, maintainable architecture across the application.
Documented technical specifications and architectural decisions in Confluence for team alignment.
Rewriting of old application written in ExtJS to ReactJS .
Creating custom reusable React components.
Implemented various screens for the front end using ReactJS and used various predefined components from NPM.
Identify and implement improvements to improve code quality, and shorten delivery timeline.
Design and implementation of Ixia's software solutions using JavaScript framework ExtJS.
Participated in understanding of ReactJS technology and development tasks.
Developed cross-browser application.
Assisted in maintaining and updating existing applications and modules.
Coordinated with other technical teams for development of portal solutions to support API
High ability to work on Agile projects, as I was involved in different projects with different teams using the Agile methodology.
Using different build tools such as: Ant and Maven.

Sep 2014 - Feb 2016

1 year 6 months

Bucharest, Romania

Software Engineer

Finastra

Software Engineer in a company that provides financial services software for banking industry, focused on lending, retail and capital markets.
Designing and developing financial software for PC and Linux platforms using Java and Javascript.
Developing risk management and risk evaluating financial tools, using mathematic and statistical algorithms
Developing new features involving mathematical methods for financial markets.
Creating interface modules in financial applications using Javascript.
Reviewing and securing code.
Implementing Unit Tests for the developed Javascript solutions.
Documenting and delivering reports on ongoing projects.
Identifying and fixing bugs reported by the clients.
Helped junior developers gain understanding of OOP and of the application and apply this knowledge accordingly.
Interact with client and get the requirements and business solutions implemented.

Jan 2014 - Sep 2014

9 months

Bucharest, Romania

Microsoft Dynamics CRM developer

Aleman Consulting

Responsible with developing new plugins using C# , for Microsoft Dynamics CRM web application
Customised Microsoft Dynamics CRM 2011 organisations at the form, entity, relationship, reports, workflow, dialogs, and business unit/user role permission level.
Form customisations with JS which included the use of JQuery, ODATA (REST), and FetchXML
Design and administration of SQL Server Database
Integration with SharePoint.
Resolved complex problems and defects occurring on integrated as well as end to end environment
Developed and implemented reports using SSMS and SSRS

May 2013 - Jan 2014

9 months

Bucharest, Romania

Front End Developer

Compu-Cons.SRL

Front End developer at a start-up company developing a management web application.
Implementing the design, development, troubleshooting and debugging of the web application using Javascript.
Creating web responsive screens using MVC , HTML5 , CSS3, JavaScript , jQuery and Bootstrap.
Creating API’s using WEB API RESTFul Services.
Assisted in development and documentation of the ASP.NET based application.
Development of new features and testing of functionality.
Working with technologies such as: MVC, SQL, C#, JavaScript, jQuery, Web application maintenance.
Developing utility in Agile Environment, involve in daily stand up meetings.

Summary

Motivated and detail-oriented senior front end developer, with 8+ of strong experience in delivering high-quality software solutions. Proven skills through working well within a close team, building and managing difficult tasks.