Olga F. Andreiko
Malaga, Spain

I am a Javascript Engineer with deep front-end expertise and comfort with back-end technologies. I have some experience working on large, complex Enterprise apps, and I've been building things for the web since 2016. For the past year, I have done Harvard CS50's program in Computer Science for Web Programming, worked with React.js, produced tools for the open-source community, like a javascript-code-runner npm package, and GitHub repository JS Prep app, written using NextJS and GraphQL.

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Top 4%
Highest experience points: 0 points,

0 activities in the last year

List your work history, including any contracts or internships
1 year 2 months
Certificate Student at Harvard's CS50 | Web Programming with Python and JavaScript
Jun 2020 - Jun 2021 (1 year)
Through six hands-on projects, I wrote APIs, created interactive UIs, and did database design.
I built from the ground up an open-source JS Prep project:
➡️ github.com/olga-f/jsprep.org
On the front end, I made a single-page app with React using the NextJS framework.
I implemented mainly static site generation with some client-side rendering using, in both cases, Apollo Client for GraphQL interactions.
I created a GraphQL backend using Django with Graphene-Python library and embraced continuous delivery with Azure DevOps.
I implemented a non-relational database (MongoDB) for flexible and fast access to data models that are easy to update and scale as needed.

I implemented front-end code in JavaScript/TypeScript using React.js with the unit, integration tests using Jest and React Testing Library, and end-to-end tests using Cypress.

I utilized React Hooks to create a dynamic functional, and reusable component-based front-end and optimized applications for maximum speed and scalability.

I shared my expertise in several posts on NextJS:
➡️ olga-f.gitbook.io/react/

I am a creator of the npm package 📦: Javascript Code Runner, where I bundled JavaScript and TypeScript code with Webpack.

I created a Visual Studio Code extension Light Color Theme for better JavaScript code readability and syntax highlighting:
➡️ marketplace.visualstudio.com/items?itemName=olga-f.light-color-theme
I combined a light color scheme for the code editor with a dark color scheme for the terminal to get a better developer experience when working with testing tools.
It already has 📥1.49K installs.
ReactJS TypeScript GraphQL Azure database devops Django JavaScript Python next.js
Certificate Student at Harvard's CS50 | Introduction to Computer Science
Mar 2020 - May 2020 (2 months)
I completed nine problem sets using C, Python, SQL.
As a part of the web track, I implemented a Finance web app using Python (Flask) and JavaScript, which you can manage portfolios of stocks.
This tool allows you to check real stocks’ 📈 actual prices and portfolios’ values and let you buy and sell stocks by querying IEX Cloud (financial data platform) for stock prices.
The projects have been successfully graded.
Harvard CS50x’s completion rate is 1% of who registered.
JavaScript Python C cloud database design unit testing
Moneytrans Full-time
Jul 2019 - Feb 2020 (7 months)
Málaga, Spain
Software Developer
I built a financial app used by 3K international money transfer agencies:
- translated Figma design and mockup into code using TypeScript, developed components, and integrated them into the core product,
- refactored and improved existing features based on requirements and feedback from the Product Owner.

I also was in other internal projects when possible delivering with JavaScript, AngularJS, and jQuery.
I implemented the Ant Design design system for one of the Angular apps, improved the dashboard, fixed bugs.

On the backend:
- added new functionalities within the .Net Framework (C#),
- analyzed data in MS SQL database,
- implemented REST API changes,
- collaborated with the Lead Engineer to implement new features and apply changes to existing ones.
TypeScript JavaScript .net Angular AngularJS database MSSQL ms sql
Data Seekers Contract
May 2019 - Jul 2019 (2 months)
Torremolinos, Spain
Frontend Developer
- Shipped a SaaS application for the tourism sector using JavaScript, Python (with Flask), utilized by 1K+ clients.
- Mentored four coworkers on technical SEO. I implemented rich snippets, which increase the visibility of pages in search results and lead to a higher click-through rate.
- Elaborated user experience guidelines for improving the front-end.
- Optimized application for the best practices, accessibility standards, and performance.
- Closely cooperated with the designers, managers, and QA.
JavaScript Python SEO

Add some compelling projects here to demonstrate your experience
Mar 2021 - Jun 2021
This section lets you add any degrees or diplomas you have earned.
University of the People
Bachelor's degree, Computer Science
Jan 2021 - Jan 2025
Computer Science 50: Introduction to the intellectual enterprises of computer science and the art of programming.
May 2020
MCSA: Web Applications - Certified 2016
Sep 2016

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