Eugene Ossipov, Software Developer in Barrie, ON, Canada
Eugene Ossipov

Software Developer in Barrie, ON, Canada

Member since October 23, 2016
Eugene has over two decades of professional experience as an architect and developer with in-depth knowledge of a wide range of methodologies and technologies. He is an expert trouble-shooter and problem solver with an extensive background in architecture, design, application development, and systems integration.
Eugene is now available for hire


    CQRS, Event Sourcing, Apache Kafka, Kotlin, Java 11
  • RBC
    Pivotal Cloud Foundry (PCF), Spring Cloud Stream, Spring Cloud, Spring Boot...
  • TD Bank
    JSON, AngularJS, JavaScript, HBase, Hadoop, Spark, Java 8



Barrie, ON, Canada



Preferred Environment

Gradle, Git, IntelliJ, Linux

The most amazing...

...thing I have worked on is a system to evaluate the translation accuracy and for triaging claim adjudication issues.


  • IT Consultant | Technical SME

    2019 - 2020
    • Analyzed the existing pension administration system's (MSS) Java 6 application that manages members of the Ontario Municipal Employees Retirement System (OMERS). Analyzed the technology environment and technical and business requirements.
    • Designed the architecture of the new generation of pension administration system called Donna.
    • Created a solution prototype for membership enrollment.
    • Led the development of two services, using Java 11, Kotlin, Spring Boot, Kafka, PostgreSQL, Zeebe, and Axon.
    • Interviewed applicants for software developer, DevOps, cloud architect, BA, and QA positions.
    • Mentored four intermediate, junior developers, and co-operative developers.
    Technologies: CQRS, Event Sourcing, Apache Kafka, Kotlin, Java 11
  • Solution Architect

    2017 - 2019
    • Defined REST API best practices to align API development across ten teams consisting of five to seven developers, resulting in an improved developer onboarding and client experience where every REST API followed the same principles.
    • Led the implementation of five APIs, using Java 8, Kotlin, Spring Boot, Spring Cloud, Pivotal Cloud Foundry, Kafka, MongoDB, and Elasticsearch.
    • Led a team of six developers in building the Fund Accounting API completed in three months. Used by top RBC I&TS clients—ten clients generating 80% of the revenue, 1 million requests per day, resulting in the decommissioning of manual reporting.
    • Mentored four intermediate and junior developers, and as a result, three developers progressed to a senior level. All of them were able to work on critical parts of the applications.
    • Implemented a CI/CD pipeline for the APIs, using Jenkins and IBM UrbanCode Deploy.
    • Supported five APIs used by top ten RBC I&TS clients in production; also maintained 99% SLA.
    • Interviewed applicants for software developer, BA, and QA positions, resulting in hiring three developers and one business analyst.
    • Spearheaded a Kotlin study group of 20 developers, resulting in adopting the new technology across three teams. The study group worked for three months.
    Technologies: Pivotal Cloud Foundry (PCF), Spring Cloud Stream, Spring Cloud, Spring Boot, Hadoop, MongoDB, Apache Kafka, Kotlin, Java 8
  • Senior Software Developer and Architect

    2015 - 2017
    TD Bank
    • Created a price supporting solution which is a decision-supporting tool for issuing loans with Java 8, Spring, Hadoop, HBase, Spark, and AngularJS.
    • Developed a set of Spark jobs and web applications for loading various market data from different sources using Java 8, Spring, Hadoop, HBase, Spark, and AngularJS.
    • Developed a set of libraries and applications that represent a platform for loading trade and exposure information from different sources with Java 7, Spring, and MySQL.
    Technologies: JSON, AngularJS, JavaScript, HBase, Hadoop, Spark, Java 8
  • Senior Software Developer and Architect

    2015 - 2015
    TMX Group
    • Worked on a set of projects that represent a platform for over-the-counter (OTC) trades (Java 7, Apache Camel, JBoss and MySQL).
    • Created a project-specific approach/strategy for business services communication and integration.
    Technologies: JBoss, MySQL, Apache Camel, Java 7
  • Senior Software Developer and Architect

    2014 - 2015
    Bank of Montreal
    • Created a Groovy-based domain specific language for interaction with RDS servers.
    • Designed and developed a solution that acts as a single repository for Capital Market Risk Management systems.
    • Designed and developed a utility for triggering and coordination of multiple services for Calculation Framework.
    Technologies: Netezza, Gemfire, Spring, Java 7
  • Team Lead | Architect

    2013 - 2014
    The Jonah Group, Ltd.
    • Created the architecture, design, and technology principles and guidelines.
    • Wrote the software architecture document (SAD) for the NUTE project.
    • Built a technical tool used to evaluate the translation accuracy and for triaging claim adjudication issues.
    • Led a cross-functional team of 10 people through the entire software development lifecycle for the NUTE project.
    Technologies: Web Services, WebSphere MQ, WebSphere Application Server, JMS, Enterprise Java Beans (EJB), JPA, PrimeFaces, JSF, Java
  • Team Lead | SOA Architect

    2012 - 2012
    Admeris Payment Systems, Inc.
    • Built a system for processing electronic funds transfers.
    • Developed a payment routing module.
    • Made a fraud detection module.
    • Developed a public API for integration with external systems.
    Technologies: GlassFish, Web Services, MySQL, Mule ESB, ActiveMQ, JMS, Enterprise Java Beans (EJB), JPA, PrimeFaces, JSF, Java
  • Software Developer | Consultant

    2009 - 2011
    ParTech, Inc.
    • Designed and developed a Hazard Analysis Critical Control Point (HACCP) solution. It is a multi-platform IT system for managing HACCP and inspection programs for large food service organizations. It consists of PDAs, sensor data acquisition, and a web-based application.
    • Implemented three different versions of the application for various platforms: Windows, Windows CE, and Linux (a Java version).
    • Provided the overall guidance and structure for creating and maintaining the customized solutions for Walmart, Royal Caribbean Cruise Lines (RCCL), Whole Foods, and Colorado University.
    Technologies: Geronimo, Web Services, ActiveMQ, XML, Enterprise Java Beans (EJB), JPA, RichFaces, JSF, SQLite, Qt 4, C++, Microsoft SQL Server, Entity Framework Core, Windows Communication Framework (WCF), Windows Presentation Foundation (WPF), C#
  • Software Developer | Consultant

    2002 - 2009
    • Designed and developed a system that allows mobile professionals to gain access to their sites from any point in the world using such technologies as the internet and remote assistance. It also gathers technical and health information from the Point-of-Sale (POS) stations, sends alerts and notifications, controls licenses, and provides remote assistance and patch management.
    • Built a framework for the integration of the electronic payment solutions into Point-of-Sale (POS) system.
    • Designed and implemented a security framework for the electronic payment subsystem in accordance with PCI Data Security Standards.
    • Designed and implemented frameworks for integrations of the POS with third-party systems such as QuickBooks (accounting), Microsoft MapPoint, and Google Maps (mapping services).
    Technologies: Oracle, JBoss AS, Enterprise Java Beans (EJB), Hibernate, RichFaces, JSF, Java
  • Software Developer | Consultant

    1999 - 2002
    The West Group Resources, Inc.
    • Designed and developed supervisory control and data acquisition system (SCADA) that connected over 400 gas stations.
    • Implemented software interfaces and protocols between the system and dispenser controllers, tank sensors, and other hardware.
    • Designed and developed a real-time supervisory control and data acquisition system (SCADA) for an oil depot.
    Technologies: Oracle, Delphi, C++


  • Genetic Algorithms: Search and Optimization by Natural Selection (Publication)
    Many problems have optimal algorithms developed for them, while many others require us to randomly guess until we get a good answer. Even an optimal solution becomes slow and complex at a certain scale, at which point we can turn to natural processes to see how they reach acceptable results. In this article, Toptal Freelance Software Engineer Eugene Ossipov walks us through the basics of creating a Genetic Algorithm and gives us the knowledge to delve deeper into solving any problems using this approach.


  • Languages

    Java 8, Kotlin, Java, XML, Java 11
  • Frameworks

    Spring Boot, JPA, Hadoop, Spring, Apache Spark, Spring Cloud Stream
  • Libraries/APIs

    JMS, JasperReports
  • Tools

    IntelliJ, Git, Gradle, Jira, Jenkins, Sonar, WildFly
  • Paradigms

    Object-oriented Design (OOD), Test-driven Development (TDD), REST, Event Sourcing, Functional Programming, Lambda Architecture, Agile, CQRS
  • Storage

    JSON, MySQL, MongoDB, Neo4j
  • Other

    Domain-driven Design (DDD), Enterprise Integration Patterns (EIP), Web Services, Spring Cloud
  • Platforms

    Windows, Linux, Apache Kafka, Pivotal Cloud Foundry (PCF)


  • Master's Degree in Computer Science
    1989 - 1995
    State Aviation Technical University - Ufa, Russia

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