Roman Kopystyrynskyi

Frontend Engineer

Surbiton, England, United Kingdom12 yrs 6 mos experience
Highly Stable

Key Highlights

  • Over 10 years of software engineering experience.
  • Led impactful projects reducing costs and improving efficiency.
  • Strong proficiency in modern web technologies.
Stackforce AI infers this person is a SaaS-focused Frontend Developer with extensive experience in optimizing user experiences.

Contact

Skills

Core Skills

React.jsJavascriptWeb Applications

Other Skills

Analytical SkillsAnt DesignApollo GraphQLBootstrapBuild ToolsCSSCSS3CommunicationCypressDebuggingDeveloper ToolsESLintFinal FormFront-End DevelopmentFundamentals

About

I am software engineer with over 10 years of experience, I love solving complex challenges using technology. Throughout my career, I have worked on a variety of CRM systems, from automating rental management for landlords to developing a video platform application for security monitoring in Tesco stores. What drives me is the opportunity to deliver valuable solutions that make a difference for customers. I believe the best way to collaborate is in Agile/Scrum teams. This ensures continuous feedback and alignment with the customer. Leading impactful projects has been a rewarding experience for me. For instance, I led the development of a video platform application that reduced thefts in Tesco stores by 13%. It's great to see how this system has helped businesses decrease thefts in stores and cut costs by not relying on third-party vendors. In terms of technical expertise, I have a strong proficiency in JS, React, GraphQL, HTML, CSS, and various React libraries. I am constantly seeking new challenges and opportunities for growth. If you're interested in learning more about software engineering or discussing potential collaborations, I would be happy to have a chat with you. Skills: Languages: JavaScript, HTML5, CSS3 Tools/Technologies: React, Redux, GraphQL, Reflux, Final Form, Lodash, Webpack, Git, SVN, Sequelize Hobbies: Tennis, Football, Swimming, Music, Reading Feel free to reach at roma9209@gmail.com.

Experience

12 yrs 6 mos
Total Experience
2 yrs 1 mo
Average Tenure
1 yr 11 mos
Current Experience

Crowdstrike

Senior Engineer - Front End

Jul 2024Present · 1 yr 11 mos · Reading, England, United Kingdom · On-site

Tesco

Front End Lead

Sep 2021Jul 2024 · 2 yrs 10 mos · Greater London, England, United Kingdom · Remote

  • Led the end-to-end development of the VideoPlatform app, replacing an expensive third-party software solution that resulted in annual cost reductions of $200k and reducing dependency on external vendors.
  • Achieved first-year development and maintenance cost savings of US$ 80,000 by accelerating development process and state management using RTK-Query.
  • Increased app development speed on 30% by replacing existing components with AntD and efficient form-handling using React-hook-form.
  • Validated app functionality and a positive user experience of the MVP version with 92% unit test coverage
  • Met highest quality standards by resolving throughput issues during app scale-up, identifying bottlenecks, and auditing performance using New Relic, leveraging Mixpanel for advanced analytics to optimize user behavior.
  • Built reusable and easy-to-use front-end components that increased the speed of developing a new internal app by 25%.
React.jsESLintBuild ToolsRedux.jsDebuggingTechnical Leadership+23

Turbotenant

Senior Frontend Developer

Apr 2017Aug 2021 · 4 yrs 4 mos · Fort Collins, Colorado, United States · Remote

  • Collaborated cross-functionally to seamlessly integrate the CRM system, optimizing user experience, and achieving a 50% reduction in property management time through integrating features such as: property management, online rent payments, property advertising and handling of rental applications.
  • Executed automated tests using Cypress framework, enhancing app stability, and reducing QA time by 40%.
  • Implemented an e-signature functionality for paperless document processing using HelloSign and React, resulting in streamlined workflows for over 1 million users and reducing document turnaround time by 60%.
  • Established a comprehensive documentation process using Confluence to ensure accurate and up-to-date information for all application features. This resulted in a 15% increase in cross-functional team efficiency and facilitated a seamless handoff between the development and support teams.
  • Conducted comprehensive code reviews utilizing GitHub, resulting in a 20% decrease in bug reports and improved code quality and consistency across the team.
FundamentalsReact.jsESLintBuild ToolsGraphQLMUI+25

Singlehop (now inap)

Frontend Engineer

May 2016Mar 2017 · 10 mos · Chicago, Illinois, United States · Remote

  • Spearheaded the development of a highly efficient CRM solution leveraging ReactJS for INAP, enabling seamless tracking and management of servers, and achieving a 60% reduction in time spent on manual processes and workflows.
  • Developed a user-friendly ReactJS dashboard that provided real-time server information, performance metrics, and key insights; integrated client-side API to fetch and update data, resulting in a 20% reduction in server management time.
  • Achieved average application first load time of <1s and data exchange between the client-side and server-side, leveraging Redux and RESTful APIs in collaboration with frontend and backend teams, UI/UX design, and QA teams.
  • Streamlined form handling and validation processes utilizing Formik, resulting in a 10% reduction in data entry errors.
FundamentalsReact.jsESLintBuild ToolsDebuggingWebpack+18

Govitall.com

Frontend Engineer

Jan 2015May 2016 · 1 yr 4 mos · Kyiv, Ukraine

  • Designed an internal CRM system to enhance management for customers and providers and centralize project management.
  • Integrated in-app chat feature for seamless customer-provider communication using React and REST API.
  • Created an automated project assignment to streamline routine activities using React, Node.js
  • Reduced manual data entry time by 5 hours/week (per team member) for the customer support team, by automating routing processes using React.
FundamentalsReact.jsESLintBuild ToolsDebuggingWebpack+16

Terrasoft ukraine

Frontend Engineer

Oct 2014Dec 2014 · 2 mos · Kyiv, Ukraine

  • Support, developing and implementing new features of web-based project-
  • management application using JavaScript on client side.
  • Designing and building test automation for old and new features, maintaining old test automation.
FundamentalsESLintBuild ToolsDebuggingWebpackSoftware Lifecycle+13

Wininteractive

Junior Software Engineer

Jul 2013Oct 2014 · 1 yr 3 mos · Vinnytsya, Ukraine

  • Engineered JavaScript solutions utilizing Backbone and jQuery, driving a 20% enhancement in web app performance.
  • Adaptive make-up for mobile devices and tablets, creating CSS3 animations.
  • Accomplished Mobile Casino project in particular GoingNuts & Loot’enKhamun.
FundamentalsESLintBuild ToolsDebuggingWebpackTechnical Understanding+12

Education

Vsp Vinnytsʹkyy Fakhovyy Koledzh Budivnytstva, Arkhitektury Ta Dyzaynu Knuba

Bachelor of Engineering - BE — Engineering

Sep 2004May 2008

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