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Igor Khromov, Java Developer in Kiev, Ukraine
Igor Khromov

Java Developer in Kiev, Ukraine

Member since February 9, 2014
Igor is a senior Java developer with experience in back-end and mobile development. He specializes in eCommerce, marketplaces, e-learning, and natural language processing. He has also received a master's degree in computer science. He is a reliable and responsible individual that works remotely on the US and Australia markets for the last six years.
Igor is now available for hire

Portfolio

  • Lipcha
    Java, Spring Boot, Spring MVC, Hibernate, Android, Objective-C, Swift, iOS...
  • Sell It App
    Java, Spring Boot, Hibernate, Swagger, Spring MVC, Android, JavaScript...
  • DataArt
    Java, Spring Boot, Spring MVC, Hibernate, JavaScript, XML, JSON, MySQL, SVN...

Experience

  • Java, 7 years
  • Amazon Web Services (AWS), 5 years
  • Spring Boot, 5 years
  • Scrum, 5 years
  • Test-driven Development (TDD), 3 years
  • Angular, 2 years
  • Elasticsearch, 1 year
Kiev, Ukraine

Availability

Full-time

Preferred Environment

IDEA, Sublime, macOS, Android Studio

The most amazing...

...thing I’ve built is a cross-platform UI for native iOS and Android apps with Yoga Facebook library.

Employment

  • Java Developer

    2015 - 2018
    Lipcha
    • Designed and developed RESTful APIs.
    • Developed websites.
    • Built cross-platform subscriptions (iOS, Android).
    • Applied OWASP best practices.
    • Wrote technical documentation, helping to document mobile UI user flows.
    • Integrated a variety of AWS services (S3, RDS, SES, SNS, Route53).
    Technologies: Java, Spring Boot, Spring MVC, Hibernate, Android, Objective-C, Swift, iOS, JavaScript, TypeScript, Angular 4, JSON, PostgreSQL, SQLite, Git, Jira, REST, Facebook API, Google API, Nginx, Tomcat, AWS, Apache Ant, Jenkins, Maven, Gradle, Crashlytics
  • Back-end Developer (Remote)

    2014 - 2015
    Sell It App
    • Designed and developed RESTful APIs for mobile applications and a website.
    • Built push notification services for iOS and Android.
    • Integrated geospatial search data and a social login feature.
    • Worked closely with stakeholders to establish and process business requirements, helping to create user stories.
    • Tested API load and performance (JMeter, Gatling).
    • Integrated AWS services (S3, RDS, SES, SNS, Route53) as well as an Openfire (XMPP) server and Twilio API.
    • Built marketplace web admin tools.
    • Developed websites.
    Technologies: Java, Spring Boot, Hibernate, Swagger, Spring MVC, Android, JavaScript, Backbone, JSON, MySQL, PostgreSQL, Git, Jira, RESTful, Nginx, Tomcat, AWS, Apache Ant, Maven, Jenkins, Facebook API, Google API, XML, XMPP, Openfire
  • Back-end Developer

    2014 - 2015
    DataArt
    • Developed websites.
    • Developed user management admin tools.
    • Integrated social login functions and Cloudflare.
    • Designed database schema.
    Technologies: Java, Spring Boot, Spring MVC, Hibernate, JavaScript, XML, JSON, MySQL, SVN, JIRA, RESTful, Nginx, Tomcat, AWS, Apache Ant, Maven, TeamCity
  • Back-end Developer (Remote)

    2007 - 2013
    Freelance
    • Designed and developed websites and RESTful APIs.
    • Fixed UI performance issues.
    • Deployed and managed server infrastructure.
    Technologies: PHP, Yii, JavaScript, jQuery, HTML, CSS, XML, JSON, MySQL

Experience

  • Back-end for Lipcha Apps (iOS and Android) (Development)

    Web services for mobile applications:
    • Sign-in (email, Google, Facebook)
    • File download/upload
    • Settings management
    • Security
    • Cross-platform subscription (iOS, Android, web)

  • Lipcha Android App (Development)
    https://play.google.com/store/apps/details?id=com.lipcha.Lipcha

    Mobile application to extend English dictionary size for ESL learners.

  • Back-end for Sellit App (Development)
    https://www.youtube.com/watch?v=dPwd84xtxr0

    Led a team to create this mobile location-based application (iOS and Android) to sell and discover nearby sales.

    Acquired by a big company in 2015.

  • News Platform (Development)
    https://news.artnet.com/

    International art market around the clock with daily art world news, expert commentary, and event reviews.

Skills

  • Languages

    Java, TypeScript, SQL
  • Libraries/APIs

    REST APIs, Volley Android Library, Flexbox
  • Storage

    SQLite, PostgreSQL, MySQL, AWS RDS, AWS S3, Elasticsearch, Redis
  • Frameworks

    Spring MVC, Spring Boot, Angular
  • Tools

    Git, Jira, AWS SES, Subversion (SVN)
  • Paradigms

    Waterfall Development, Kanban, Agile Software Development, Scrum, Test-driven Development (TDD)
  • Platforms

    AWS EC2, Amazon Web Services (AWS), MacOS, CentOS, FreeBSD

Education

  • Master's degree in Software Engineering of Automated Systems
    2002 - 2007
    Kharkov University of Air Forces - Kharkov, Ukraine
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