
Ihor Romanchuk
Verified Expert in Engineering
Software Developer
Ihor is an experienced senior full-stack web developer with a strong track record of delivering quality products. Proficient in multiple technologies, he excels in crafting custom projects, making informed architectural decisions, and managing databases, back ends, front ends, cloud hosting, CI/CD, and more. Currently, Ihor focuses on front-end development using React, TypeScript, and JavaScript. His dedication and adaptability make him a valuable asset for any project.
Portfolio
Experience
Availability
Preferred Environment
Docker, Amazon Web Services (AWS), React, TypeScript, Node.js, C#, SQL
The most amazing...
...web service I helped develop is called JustAnswer. It required extensive, in-depth testing, refactoring, complex integrating, and creating bug-free solutions.
Work Experience
Senior Full-stack Developer
Realtyshoot
- Developed an app that connects real estate owners with photographers and stagers. It lets them find and choose the photographer and schedule the photo session.
- Fixed multiple problems including the broken Stripe integration.
- Managed one mid-level front-end developer using Jira as a task management tool. Conducted regular code reviews.
- Improved the development setup with a Docker Compose file for local development.
Senior Node.js Engineer
Digible Inc.
- Developed a minimum viable product (MVP) that automates content posting on Facebook and Instagram, enhancing content delivery efficiency.
- Designed multiple content templates for Facebook and Instagram, enriching the MVP's capabilities for diverse posting needs.
- Engineered a rule-based algorithm to generate new social media content, expanding automated content variety.
- Refined TypeScript settings to enable null reference error checking, enhancing code robustness in the existing project.
- Authored a comprehensive technical design document outlining the content-generation process, serving as a blueprint for future development and team member onboarding.
- Automated the development workflow by setting up Github Actions, streamlining build and deployment processes during pull requests.
- Standardized coding practices by configuring ESLint according to the Airbnb JavaScript Style Guide and fixed related errors.
- Collaborated with cross-functional teams to gather requirements and feedback, ensuring the MVP aligned with organizational goals and user needs.
- Conducted rigorous testing and debugging of the MVP, contributing to reliable uptime and minimal rollbacks on deployments.
Senior Full-stack Developer
GeneDx
- Completed a 1.5-year migration project successfully, transitioning from AngularJS to React with TypeScript.
- Implemented new website layouts based on Figma designs, ensuring a modern and intuitive user experience.
- Developed a comprehensive component library, adhering to Figma designs, for seamless integration into the website.
- Reverse-engineered legacy code, enhancing maintainability and scalability by migrating it to a clean and efficient React codebase.
- Expertly managed a complex ordering flow with multiple steps, sub-steps, and fields, including real-time validation and status tracking.
- Implemented data persistence functionality, enabling users to reload the page without losing entered data, enhancing user convenience.
- Integrated React application and standalone React components into the CRM system.
- Successfully set up advanced event tracking using GA4 (Google Analytics 4) and designed a comprehensive technical schema leveraging GTM (Google Tag Manager) to optimize user experience insights and enhance digital strategy.
Senior Front-end Developer
Unilever
- Implemented the designs of several screens with pixel-perfect accuracy.
- Adjusted Material UI components to the design appearance using the theming approach.
- Introduced React development best practices to the project.
Senior Full-stack Developer
Yara
- Developed an app that helps farmers create crop nutrition plans. The app gives you a recommendation on when and how much fertilizer you should apply. Users can view data in different formats like tables and charts and share the plan as a link or PDF.
- Built an app that helps farmers keep track of the farm's sustainability. It calculates the CO2 and N emissions levels compared to benchmarks and gives users improvement suggestions.
- Conducted interviews for junior, mid, and senior positions.
- Demoed new features to other teams and stakeholders.
- Investigated the best graph library for the project, prepared comparisons with showcases, and presented them to the team leads.
- Worked as part of the development team following the Scrum process. Conducted onboarding sessions for newcomers.
Senior Full-stack Developer
ALLEYE
- Implemented a web service called ALLEYE from scratch, helping organize and manage the instrument validation process in the health industry.
- Prepared the architecture and implemented the website that consists of an ASP.NET Core REST API, a React SPA, and an SQL server database hosted in a dockerized Linux container on AWS.
- Implemented features such as a dashboard with plenty of charts, audit trail, authentication and authorization with roles and permissions (using ASP.NET Core Identity and JWT), recurring jobs with Hangfire, and screen lockout after some time of inactivity.
- Transformed the client's requirements into working solutions. Worked following the Scrum methodology, with daily scrums, grooming, planning sessions, and estimates, managing a small team of developers.
- Configured CI/CD with test environment and auto deployments with Azure DevOps and AWS ECS.
Senior Full-stack Developer
Freelance
- Created a React application that generates an HTML page based on data provided in the JSON file, then converted this page into a PDF file using headless Chrome.
- Refactored and added new functionality to websites written in AngularJS, including logic and styles.
- Developed a data parser that took .txt files as input, then red-lined and decoded them from Base64 to parsed JSON, calculated all needed data, and produced a new file with results.
- Communicated with clients from the US, India, and UAE.
- Analyzed requirements, provided estimates, and met deadlines.
Senior Full-stack Developer
e-Boks A/S
- Prepared the architecture for a new product that consisted of several services and a SPA. Created user stories, provided estimates, and built the tracking progress.
- Conducted about 20 interviews for the project so far.
- Created projects from scratch and deepened my knowledge of the security domain.
- Refactored and introduced unit testing in products.
Middle Full-stack Developer
JustAnswer
- Led a subproject, including overseeing the SDD preparation, creating user stories, providing estimates, and tracking progress.
- Spearheaded a data quality initiative within the team. The primary goal was to find problems with tracking, introduce solutions and implement them, and ensure correctness via integration and Selenium tests.
- Refactored many elements, writing dozens of unit, integration, and Selenium tests.
- Conducted extensive A/B testing, including implementing many experiments that required several versions of web pages, which differed in UI and functionality, and compared the conversion rate and other metrics of those pages.
- Became deeply familiar with the Scrum methodology here.
- Established and ran code reviews for my teammates.
Junior Full-stack Developer
ByteAnt
- Developed new web pages, including writing styles, JavaScript, database queries, unit tests, and more.
- Optimized the performance of SQL queries via stored procedure optimization and database denormalization which reduced the load time from 30 seconds to 100 milliseconds.
- Became experienced with ASP.NET MVC, HTML, CSS, JavaScript, jQuery, Angular, Microsoft SQL Server, Elasticsearch, Entity Framework, LINQ, SVN, Git, and TeamCity.
Experience
Fiona Posts
https://digible.com/I've developed a minimum viable product (MVP) that automates content posting on Facebook and Instagram, enhancing content delivery efficiency. I also designed multiple content templates for Facebook and Instagram, enriching the MVP's capabilities for diverse posting needs.
Provider Portal
https://www.genedx.com/In a 1.5-year migration project for GeneDx's Provider Portal, I led the transition from AngularJS to React with TypeScript. I designed new Figma-based layouts, created a robust component library, and reverse-engineered legacy code for a seamless migration. The complex ordering flow was reimagined, featuring real-time validation, a dynamic side menu, and data persistence, resulting in an intuitive and efficient user experience. The successful project cemented GeneDx's position as a leader in genetic and genomic testing services.
Atfarm
https://www.at.farm/Moreover, it keeps track of the farm's sustainability. It calculates the CO2 and N emissions levels compared to benchmarks and suggests improvements.
ALLEYE CMMS Software
https://www.apsinco.com/alleye-cmms-softwareIt is written in C#, React, and TypeScript and uses SQL server as the database.
I created everything from scratch, which included setting up CI/CD on Azure DevOps with a Git repo and automatic deployments to AWS ECS.
The codebase is covered with unit tests and end-to-end tests using Cypress.io.
Later on, I managed a small team of developers.
JustAnswer
e-Boks
https://www.e-boks.com/danmark/da/Mechanic Advisor
https://www.mechanicadvisor.com/HTML to PDF Conversion
The source code can be found here: https://github.com/likerrr777/PrintHtmlToPdf
Skills
Languages
T-SQL (Transact-SQL), CSS, Sass, Less, TypeScript, JavaScript, HTML, SQL, C#, C#.NET, CSS3, ECMAScript (ES6), SCSS, GraphQL, HTML5, Python
Frameworks
Redux, NUnit, ASP.NET, ASP.NET Core, Entity Framework Core, MUI (Material UI), .NET, .NET Core, Jest, Express.js, ASP.NET MVC, NestJS, Cypress, Selenium, JSON Web Tokens (JWT), React-Bootstrap, Swagger, Next.js, Tailwind CSS, ASP.NET Web API, AngularJS, Angular, OAuth 2, Bootstrap
Libraries/APIs
MediatR, AutoMapper, Recharts, REST APIs, React, LINQ, Moq, Entity Framework, Node.js, Handlebars, React-Intl, Formik, Yup, React Router, React Redux, jQuery, Lodash, Urql, Puppeteer, YouTube API, MobX, Stripe
Tools
Visual Studio, Git, GitHub, SQL Management Studio, Figma, Postman, Prisma, JSS, Hangfire, Amazon Elastic Container Service (Amazon ECS), Amazon Elastic Container Registry (Amazon ECR), Sequelize, Jira, Amazon CloudFront CDN, Dynatrace, TFS, TeamCity, AWS IAM, Subversion (SVN), RabbitMQ, CircleCI, Google Analytics, Webpack, Docker Compose
Paradigms
REST, FluentValidation, Code First, Unit Testing, Microservices, Responsive Web Design (RWD), Azure DevOps, Database Design, Test-driven Development (TDD), E2E Testing, Automated Testing, Web Performance Optimization (WPO), DevOps, Search Engine Optimization (SEO), B2C
Platforms
Visual Studio Code (VS Code), Windows, Amazon Web Services (AWS), Linux, Docker, Amazon EC2, AWS Lambda, Twilio, Heroku, Google Cloud Platform (GCP)
Storage
SQL Server 2017, Microsoft SQL Server, RDBMS, SQL Server Management Studio, Databases, PostgreSQL, Amazon S3 (AWS S3), MySQL, Datadog, Redis, Elasticsearch, NoSQL, Google Cloud
Other
Cross-browser Compatibility, Single-page Applications (SPA), React Hooks, Front-end, Authentication, Authorization, APIs, Full-stack, Storybook, SOLID Principles, Multithreading, Design Systems, Styled-components, ESLint, Charts, Web Development, API Integration, Architecture, User Experience (UX), User Interface (UI), UI Components, Back-end, CI/CD Pipelines, Web Applications, UI Libraries, Component Libraries, Front-end Architecture, Front-end Development, Algorithms, Minimum Viable Product (MVP), Integration Testing, Full-stack Development, Customer Relationship Management (CRM), API Gateways, Pixel Perfect, Data Visualization, Axios, Identity, Serverless, React Hook Forms, PDF, MERN Stack, Cryptography, SaaS, OAuth, Integration, Headless Commerce, Animation, Google Analytics 4, Octopus Deploy, Serilog, TypeORM, Team Management, Apollo, Segment, Phrase, Chromium, Cryptocurrency, Applied Mathematics, UIBakery, Web3, Crypto, Decentralized Finance (DeFi), Monorepos, Google Tag Manager, Vercel
Education
Master's Degree in Applied Mathematics and Informatics
Ivan Franko National University - Lviv, Ukraine
Certifications
NestJS Zero to Hero — Modern TypeScript Back-end Development
Udemy