Jaroslav Vorobey, React Developer in London, United Kingdom
Jaroslav Vorobey

React Developer in London, United Kingdom

Member since February 1, 2022
Jaro is a startup founder who has previously worked at JPMorgan Chase & Co. and Deutsche Bank AG with more than three years of experience ideating and overseeing the delivery of exceptional software. He excels in React, TypeScript, Next.js, Node.js, Firebase, and Google Cloud. A fast and thorough learner of new technologies and a native English and Italian speaker, Jaro enjoys working on challenging products and delivering outstanding results.
Jaroslav is now available for hire


  • Raise Financial
    JavaScript, Responsive UI, Puppeteer, Node.js, Next.js, MVP Design, Strategy...
  • 3Cells
    JavaScript, TypeScript, React, Node.js, Firebase, PostgreSQL, Google Cloud...
  • Reach Digital
    React, Next.js, Node.js, Material UI, Tailwind CSS, Architecture, Mobile, Web...



London, United Kingdom



Preferred Environment

Firebase, MongoDB, Node.js, React, JavaScript, TypeScript, GitHub, Bitbucket, Slack

The most amazing...

...project I've created is Winfluencer.io, a web app for YouTubers I created from scratch using React, Node.js, Material-UI, Firebase, and the YouTube API.


  • Lead Software Engineer

    2022 - PRESENT
    Raise Financial
    • Worked with the CTO to migrate their Ruby platform to Next.js. Designed strategy and prioritization for the migration to minimize downtime and user impact.
    • Communicated often and effectively, summarizing current progress, estimates, and potential risks to delivery.
    • Consulted the CTO on product direction and technical evaluation of key deliverables.
    Technologies: JavaScript, Responsive UI, Puppeteer, Node.js, Next.js, MVP Design, Strategy, IT Strategy, Agile Delivery, CTO, Team Leadership, Prisma
  • Founder

    2020 - PRESENT
    • Created a profitable software-as-a-service application that helps influencers discover growing trends, winfluencer.io.
    • Oversaw the delivery of a production application using React, Material-UI, Firebase, Google Cloud, and YouTube API following user interviews and requirement elicitation.
    • Headed the direction of sales, marketing, finance, and strategy for the company.
    • Managed multiple team members to achieve weekly objectives.
    Technologies: JavaScript, TypeScript, React, Node.js, Firebase, PostgreSQL, Google Cloud, Strategy, MVP Design, Consulting, Cloud Firestore, Firebase Firestore & Cloud Functions
  • Lead Software Engineer

    2022 - 2022
    Reach Digital
    • Defined the startup's product strategy with the CEO, outlining goals and deliverables. Outlined the MVP and what it should achieve. Evaluated which features to keep and cut based on relative added value to customers.
    • Decided on the Next.js tech stack based on evaluating the company's technical needs, both for the MVP and long-term.
    • Oversaw the product launch, helping onboard initial customers while using their feedback to create additional value for the product. Consulted the CEO on the product's scalability and potential long-term solutions to strategic challenges.
    Technologies: React, Next.js, Node.js, Material UI, Tailwind CSS, Architecture, Mobile, Web, Milestones, Roadmaps, CTO, Startups
  • Full-stack Software Engineer

    2021 - 2022
    Deutsche Bank
    • Created a multi-department release management system using React, Material-UI, CSS, and MongoDB.
    • Owned the project from start to finish, managed other developers, and. Handled communication with stakeholders.
    • Maintained test coverage at 100% throughout development, resulting in zero production issues encountered since release.
    Technologies: JavaScript, TypeScript, Java, React, MongoDB, PostgreSQL
  • Full-stack Software Engineer

    2019 - 2020
    JPMorgan Chase
    • Developed a complex analytics web application for senior management using TypeScript, React, CSS, and Jira API. This tool became the most significant priority for 2020 in my line of business.
    • Volunteered to code a data integrity checker for reference data which was previously populated and checked manually, reducing the workload of two teams by multiple hours each week.
    • Implemented real-time monitoring and alerting to improve the application's stability, halving the number of production issues encountered in the following two months.
    Technologies: Bitbucket, Node.js, React, JavaScript, TypeScript


  • Release Notifier

    A React application for a Fortune 500 bank that manages communication between stakeholders and developers.

    I developed and led the project, managing other developers, achieving the deliverable ahead of schedule. I was able to maintain code coverage at 100% throughout development.

    This project was built with TypeScript, React, MongoDB, and Material-UI. It connects to a Java backend and PostgreSQL via REST API.

  • Winfluencer.io

    An application built with React, Node.js, Firebase, Material-UI that uses the YouTube API to fetch and analyze millions of videos to discover trending topics relevant for creators and help them make content aligned with their audience's interests. The blog for this site was built using Next.js.

    I built this app from start to finish, managed team members, and acquired customers. I used CI/CD on Google Cloud to implement continuous deployment and separate testing environments. I also implemented bundle optimization and lazy loading to 10x performance, leading to significant SEO improvements.

  • Hand Crafted Chess

    A Shopify eCommerce website customized to increase conversions.

    I managed multiple team members and contractors and designed logos, branding, and calls to action. I also headed the social media campaign and advertising.


  • Languages

    JavaScript, TypeScript, HTML, ECMAScript (ES6), HTML5, CSS, C, Assembly, Java, SQL
  • Frameworks

    Material UI, Next.js, Tailwind CSS
  • Libraries/APIs

    Node.js, React, Puppeteer
  • Tools

    GitHub, Bitbucket, Webpack, Slack, Prisma
  • Paradigms

    Agile, Management, REST
  • Platforms

    Visual Studio Code, Firebase, Shopify, Mobile, Web
  • Other

    Communication, Software Development, React Testing Library, Financial Data, Full-stack, Responsive UI, Web Marketing, B2C Marketing, Advertising, Architecture, Milestones, Roadmaps, CTO, Startups, Strategy, MVP Design, Consulting, IT Strategy, Agile Delivery, Team Leadership, Firebase Firestore & Cloud Functions
  • Storage

    Google Cloud, MongoDB, PostgreSQL, Cloud Firestore


  • Bachelor's Degree with First Class Honors in Computer Science
    2017 - 2021
    University of Bath - United Kingdom

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