Jaroslav Vorobey
Verified Expert in Engineering
React Developer
Jaro is a startup founder who has previously worked at JPMorgan Chase & Co. and Deutsche Bank AG with more than four 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.
Portfolio
Experience
Availability
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.
Work Experience
Founder
3Cells
- Created a web scraper in Puppeteer and Node.js that gets thousands of emails weekly and automatically sends personalized emails.
- Headed the company's sales, marketing, finance, and strategic direction.
- Created a production application from scratch using React, Material-UI, Firebase, Google Cloud, and YouTube API.
- Managed multiple team members to achieve weekly objectives.
Lead Software Engineer
Reach Digital
- Created analytics platform in React, TypeScript, Node.js, Next.js, and MongoDB.
- Deployed 10+ Next.js projects to Vercel for multiple eCommerce clients integrating with Shopify and Stripe API.
- Defined the startup's product strategy with the CEO, outlining goals and deliverables. Outlined the MVP and what it should achieve. Evaluated what features to keep and cut based on relative added value to customers.
- Designed the client- and server-side architecture, considering strict real-time responsiveness and scalability requirements, which led to its deployment to the cloud.
- 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.
- Created DevOps CI/CD pipeline and managed deployments to Google App Engine and Cloud Functions.
- Reverse-engineered Meta Pixel and created a pixel competitor from scratch in JavaScript, which is currently used by tens of eCommerce clients.
Lead Software Engineer
Raise Financial
- Recreated the company's existing Ruby platform in React, Next.js, and Prisma, matching functionality one-to-one.
- Communicated with stakeholders effectively, summarizing current progress, estimates, and potential risks to delivery.
- Consulted the CTO on product direction and technical evaluation of key deliverables.
- Integrated payments using Stripe and Plaid APIs, designing complex logic involving the custom generation and parsing NACHA files.
- Added new UI components using React and Tailwind CSS.
Full-stack Software Engineer
Deutsche Bank
- Created a multi-department release management system using React, Material-UI, CSS, Redux, 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.
Full-stack Software Engineer
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.
Experience
Release Notifier
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
https://winfluencer.ioI 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.
Raise Financial | Next.js Application
https://www.raisefinancial.comSkills
Languages
JavaScript, TypeScript, CSS, HTML, ECMAScript (ES6), HTML5, SQL, CSS3, Python 3, Python, C, Assembly, Java, GraphQL, PHP, C#
Frameworks
Material UI, Next.js, Redux, OAuth 2, Express.js, JSON Web Tokens (JWT), Tailwind CSS, Jest, Cypress, Svelte, Ruby on Rails (RoR)
Libraries/APIs
Node.js, React, Stripe, Stripe API, REST APIs, D3.js, Social Media APIs, Context API, React Testing Library, Puppeteer, Plaid API, Chart.js, Shopify API, Google Maps API
Tools
GitHub, Bitbucket, Prisma, Git, GitLab, Figma, Microsoft Teams, Webpack, Plaid, Trello, Babel, Slack, Amazon CloudFront CDN
Paradigms
Agile, Continuous Integration (CI), Microservices, Design Patterns, Mobile Development, Serverless Architecture, Responsive Web Design (RWD), Unit Testing, Lambda Architecture, Management, REST, Data Science, Event-driven Architecture, DevOps, Search Engine Optimization (SEO)
Platforms
Visual Studio Code (VS Code), AWS Lambda, Vercel, Firebase, Shopify, Mobile, Google Cloud Platform (GCP), Amazon Web Services (AWS), Docker, Heroku, Web, Azure
Storage
MySQL, NoSQL, JSON, Elasticsearch, Databases, Google Cloud, MongoDB, PostgreSQL, Amazon S3 (AWS S3), Amazon DynamoDB, Cloud Firestore
Industry Expertise
Social Media, Marketing
Other
Communication, Software Development, Architecture, CTO, Cloud Infrastructure, System Architecture Design, Server Architecture, Front-end, Back-end, User Interface (UI), User Experience (UX), APIs, Server-side Rendering (SSR), Web Scraping, Storybook, API Integration, Technical Leadership, Serverless, Authentication, OAuth, Autoscaling, Web Development, CSS3 Animation, Single-page Applications (SPA), Software Architecture, Project Consultancy, Full-stack Development, Front-end Development, OpenAI GPT-4 API, DNS, Front-end Architecture, Data Scraping, Data Visualization, Data Processing, Slack App, Scraping, Software Design, Scalability, Cloud, Integration, MERN Stack, SaaS, CI/CD Pipelines, Responsive Design, ChatGPT, Supabase, Progressive Web Applications (PWA), Fintech, UI Components, Design Systems, Mobile First, Digital Payments, Card Payments, Stripe Payments, Payment Gateways, Software Engineering, Financial Data, Full-stack, Responsive UI, Team Leadership, ACH, Payment APIs, Animation, Leadership, Headless Commerce, Machine Learning, Artificial Intelligence (AI), Vectors, Chakra UI, Remote Team Leadership, Design, OpenAI GPT-3 API, Toolkits, eCommerce, Performance, Slackbot, Cross-browser Compatibility, Web Marketing, B2C Marketing, Advertising, Milestones, Roadmaps, Startups, Strategy, MVP Design, Consulting, IT Strategy, Agile Delivery, Server Infrastructure, Infrastructure, Monday.com, Framer, UI Animation, Firebase Cloud Functions, Content Delivery Networks (CDN), Generative Pre-trained Transformers (GPT), HubSpot CRM, Deployment, QR Codes
Education
Bachelor's Degree with First Class Honors in Computer Science
University of Bath - United Kingdom
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