Volodymyr Gubarkov, Software Developer in Kiev, Ukraine
Volodymyr Gubarkov

Software Developer in Kiev, Ukraine

Member since March 18, 2019
Along with having a skillset in DevOps and superb communication skills, Volodymyr possesses extensive experience in full-stack development as a software engineer, tech lead, and solution architect. He's worked in the field since 2005 for successful startups and big enterprises. Volodymyr typically develops the back end on Java and Node.js and the front end on React, Angular, and Vue.js.
Volodymyr is now available for hire


  • CryptoTax.io
    Java, Spring Boot, React, PostgreSQL, AWS, Flutter, ELK
  • CML Team Ltd
    Java, Spring Boot, Spring Framework, Hibernate, Node.js, React, Vue.js...
  • Trade Republic Bank GmbH
    Node.js, Vue.js, TypeScript, RxJS, REST API, WebSockets, RabbitMQ



Kiev, Ukraine



Preferred Environment

Linux Mint, IntelliJ IDEA, Git, Mercurial, GitLab

The most amazing...

...things I've done was as a developer made a crucial impact on a startup’s success which disrupted the hospitality industry and raised $40 million.


  • Tech Lead

    2018 - PRESENT
    • Provided the client with a full-functional back-end engine, smoothly integrated with rich front-end endpoints.
    • Implemented features including tax report fees calculation for different operations (trades, deposits, withdrawals) as well as coverage of the most frequent crypto assets use cases (stacking, lending, ICO, hard-fork).
    • Ensured that the first release of the application to production went smoothly.
    • Developed several new features for the client as well as maintaining the production application and infrastructure.
    • Built a mobile app on the Flutter framework which is currently at the testing stage.
    Technologies: Java, Spring Boot, React, PostgreSQL, AWS, Flutter, ELK
  • CTO

    2016 - PRESENT
    CML Team Ltd
    • Established the company technology vision, strategies, and plans for growth.
    • Defined the hiring strategy and practices.
    • Established an engineering roadmap for the company and ensure it can sustain the company's business plans.
    • Introduced development practices and standards.
    • Set up supervising and quality assurance processes.
    • Mentored with engineers to support their career development plans.
    • Spearheaded multiple clients' projects as a software consultant.
    Technologies: Java, Spring Boot, Spring Framework, Hibernate, Node.js, React, Vue.js, Angular, MySQL, PostgreSQL, ELK, New Relic, Tomcat, Ethereum, Solidity, Flutter
  • Senior Software Engineer | Tech Lead

    2018 - 2019
    Trade Republic Bank GmbH
    • Implemented the full scope of the project including server side and client side as well as integrating with all the back-end systems.
    • Worked closely with other developers on the client side to provide seamless integration with all the subsystems.
    • Delivered many new features to the application in accordance with very dynamically changing business requirements.
    • Ensured that first release to the production happened smoothly.
    • Conducted client-side and server-side performance tuning.
    Technologies: Node.js, Vue.js, TypeScript, RxJS, REST API, WebSockets, RabbitMQ
  • Tech Lead

    2016 - 2018
    PartyBunny Chatbot
    • Built a solution that allows one to gather events from all sources in one place.
    • Implemented automatic actions (event addition, update, deactivation, de-duplication) as well as manual editing/adding by the event manager.
    • Integrated different NLP third-party engines such as IBM Watson API and Alexa Skills Kit.
    • Participated with a sales team in presenting this product at StepConference in Dubai.
    • Led and mentored other developers on the project.
    Technologies: Java, Spring Boot, Facebook Messenger API, Facebook Graph API, ChromeDriver, IBM Watson API
  • Senior Software Engineer | Tech Lead

    2013 - 2017
    ALICE Platform
    • Implemented a user web interface based on AngularJS and RESTful services along with the server back-end logic, (Grails controllers/services); also developed a mobile app using Ionic and an image manipulation functionality (uploading, resizing, storing, serving).
    • Designed the database structure, optimized SQL queries, and tuned the database setup and caching.
    • Implemented integrations with dozens of third-party systems (PMS, Twilio, HotSOS, bttn, ExaVault, IMAP, Mixpanel, New Relic, and so on).
    • Implemented a microservice for PDF printing and an images processing functionality.
    • Developed advanced centralized systems logging based on the ELK stack.
    • Created a full-text search subsystem based on Elasticsearch cloud.
    • Optimized system performance (Groovy, Java, SQL).
    • Worked closely with the DevOps team.
    Technologies: Java, Groovy, Grails, AngularJS, Ionic Framework, ELK, New Relic, MySQL, Rackspace, DigitalOcean, AWS, Twilio, HotSOS, Mixpanel
  • Senior Software Engineer | Tech Lead

    2006 - 2017
    Starpoint Solutions (Yoh.com)
    • Worked in a number of Starpoint Solutions clients' projects.
    • Started out as a software engineer and eventually reaching the position of tech lead with mission-critical responsibilities.
    • Led and mentored other developers on various projects.
    • Promoted best practices of code review and pair-programming processes.
    • Helped the pre-sales teams with estimates and project evaluations.
    Technologies: Java, Apache Maven, Spring Framework, Apache FOP, Twitter Bootstrap, Jquery, Apache Tomcat, Jetty Web Server, Java Swing, Java XPath, Angular, AWS, Grails, Groovy, New Relic, ELK, DigitalOcean, Rackspace, Atlassian Bamboo


  • ALICE Platform (Development)

    About the Project:
    • ALICE is a mobile-first global hospitality operations platform that is re-inventing how businesses can use cloud technology to improve their customer service.
    • In an industry of fragmented solutions, ALICE provides a streamlined platform to serve the needs of staff, guests, and management in one front-of-house and back-of-house system.
    • It is a US-based company that offers a cloud hotel concierge service for more than 2,000 hotels around the globe.

    Work Done:
    • I was responsible for the core development of the ALICE platform.
    • I worked there from the very beginning until the startup passed the Series B stage with $40 million in investment raised.

  • A Review of My Work From the ALICE Platform Founders (Other amazing things)

    I was one of the first and core developers of the ALICE platform from the early days of the startup, and I was proud of my contribution to the company's success in disrupting hospitality space and raising over $40 million in investments.

  • CryptoTax.io (Development)

    About the Project:
    • CryptoTax.io is a Munich-based startup offering sophisticated taxation platform for crypto investors and crypto traders.
    • It is a B2C web and mobile solution that will ease the process of tax reports for crypto asset holders and traders.
    • It is a complex system which allows a user to aggregate their trading data from multiple accounts on multiple exchanges and create tax reports according to laws of Germany and Switzerland.

  • Trade Republic Bank GmbH (Development)

    About the Project:
    • An implementation of an administrative web app for all of the back-end systems for the new German Stock Exchange Trading platform.

    Work Done:
    • Worked on the full scope of the project including the server side (based on Node.js) and the client's front end (based on Vue.js and TypeScript) as well as integrating with all of the back-end systems (through REST APIs, WebSockets, RabbitMQ, and the like).
    • Collaborated with other developers on the client side to provide seamless integration with all the subsystems.
    • Delivered many new features to the app in accordance with dynamically changing business requirements.

  • Party Bunny Chatbot (Development)

    About the Project:
    • Party Bunny is a Facebook chatbot: a platform for managing entertainment events.
    • It provides the list of the parties along with geolocation for tonight, tomorrow, and the whole week ahead.
    • Currently, Party Bunny has a nightlife calendar for Dubai and Bangkok.

    Work Done:
    • Provided a solution to gather all events from all sources in one place.
    • Enabled automatic functions (event addition, update, deactivation, de-duplication) as well as manual editing/adding by the event manager.
    • Developed a solution that provides a list of events with special offers, a detailed description, source links, geolocation, and offers the ability to call the venue right away.

  • Digital Archive for Yale University Press (Development)

    About the Project:
    • Designed and developed a social-educational website for providing access to the corpus of Stalin Digital Archive to students and other interested parties (through subscriptions).
    • The archive itself is a large number of XML files with data (digitized books, letters, and so on) along with the metadata and many images.
    • The problem was enabling user-friendly access to all this information through the Stalin Digital Archive website. Users needed the ability to navigate, search, discuss, bookmark, and so on through all documents in the archive.
    • The front end was implemented on top of PHP and Drupal CMS as a bunch of custom Drupal modules.
    • I created a Java Web Start application for importing (synchronizing) archive content to the site database.

  • IBRF ProtoTracker | Medical App (Development)

    During this project, I designed and implemented a web-based medical app for tracking clinical treatment protocol data for the IBRF-US organization dealing with the treatment of brain diseases/injuries.

  • InstiHire | Salesforce Automation Platform (Development)

    Work Done:
    • Developed and maintained a web-based contact-management system for Salesforce automation based on Java technologies.
    • Implemented number of user web-interface screens on the Ext JS framework.
    • Designed the database structure, optimized SQL queries, and tuned the database setup and caching.
    • Deployed the application logic using Spring Framework.
    • Integrated the application with MS Exchange Server.
    • Built the full-text-search functions of the system based on the Apache Lucene library.
    • Unit-tested the application code.
    • Participated in migrating the application from SQL Server to a PostgreSQL database.

  • Westcon | eCommerce Website (Development)

    During the project, I participated in the development and maintenance of Westcon company's eCommerce websites.

    Technologies: ASP.NET Framework, MS SQL Server, Microsoft Commerce Server


  • Languages

    Java 8, Java 9, Java 10, Java 11, JavaScript, Groovy, Java SE, Bash, TypeScript, Solidity, Google Apps Script, Python
  • Frameworks

    Spring Boot, Redux, Spring, AngularJS, Grails, Hibernate, Angular, Ionic, Flutter
  • Libraries/APIs

    React, RxJS, jQuery, Facebook Messenger API, Node.js, Vue.js, Facebook Open Graph API
  • Tools

    Git, IntelliJ IDEA, ELK (Elastic Stack), Kibana, Bamboo, Apache Tomcat, Jetty, RabbitMQ, Rundeck, IBM Watson, Actions on Google
  • Paradigms

    Agile Software Development, Concurrent Programming, DevOps
  • Platforms

    Linux Mint, DigitalOcean, Ethereum, Twilio, Mixpanel, Amazon Alexa
  • Storage

    PostgreSQL, MySQL, AWS S3
  • Other

    WebSockets, RESTful Services, AWS DevOps, Telegram Bots, WebLogic, Ethereum Smart Contracts, GlassFish


  • Master of Science (MSc) degree in Applied Mathematics and Physics
    2002 - 2008
    Moscow Institute of Physics and Technology - Dolgoprudny, Russia

To view more profiles

Join Toptal
I really like this profile
Share it with others