Julian Bell, Developer in Perth, Western Australia, Australia
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Julian Bell

Verified Expert  in Engineering

Software Developer

Perth, Western Australia, Australia
Toptal Member Since
May 13, 2017

Julian is a full-stack developer with over a decade of commercial software development experience, including architectural design. He's extremely knowledgable about Java, Kotlin, and agile methodologies, plus he's a hard-working and fun addition to any team.


Colleagues Matrixx
Amazon Web Services (AWS), Hibernate, AWS Certificate Manager...
SemaphoreCI, KOIN, Identity Server, OpenID, Gradle, Kotlin
Onyx Services
Mockito, AssertJ, Logback, Project Lombok, HikariCP, Hibernate, Spring Data JPA...




Preferred Environment

Windows, Linux

The most amazing...

...project I've implemented is a secure voucher system used across Europe by a major media organization.

Work Experience

Java Developer

2020 - 2020
Colleagues Matrixx
  • Co-designed and implemented a non-blocking REST API using Spring Boot.
  • Implemented a 2-way TLS security setup using Amazon ACM certificates.
  • Ensured fault tolerance by integrating it with Amazon SQS.
Technologies: Amazon Web Services (AWS), Hibernate, AWS Certificate Manager, Amazon Simple Queue Service (SQS), Spring Boot

Kotlin Security Developer

2019 - 2020
  • Used lightweight Kotlin libraries such as Javalin and Koin.
  • Implemented user security using OpenID Connect and JWT.
  • Implemented continuous integration using GitHub and Semaphore CI.
  • Used an existing KMIP client implementation and updated it to use TLS 1.2.
Technologies: SemaphoreCI, KOIN, Identity Server, OpenID, Gradle, Kotlin

Senior Java Developer

2019 - 2019
Onyx Services
  • Migrated existing Java applications.
  • Implemented extensive security overhauls and other requested changes on existing projects.
  • Worked in an agile team consisting of three developers, two testers, and two Scada engineers.
  • Migrated and updated crucial applications from Western Power to AEMO.
  • Updated all applications to Java 8 and the latest Spring and Spring Boot.
  • Implemented continuous integration using Bamboo.
  • Integrated applications to authenticate with Active Directory using Spring Security and UnboundID LDAP.
  • Delivered all projects on time and budget.
Technologies: Mockito, AssertJ, Logback, Project Lombok, HikariCP, Hibernate, Spring Data JPA, Oracle, LDAP, UnboundID, Spring Security, Spring Integration, Boot, Spring, Spring 5, Bamboo, Apache Maven, Java 8

Software Developer

2017 - 2018
  • Worked in agile teams consisting of a back-end developer, a front-end developer, a QA, a BA, and a product owner.
  • Developed simple REST API Spring Boot 2 back-end applications using a combination of blocking and non-blocking (Reactive) endpoints.
  • Designed and implemented a learning management system so that mistakes are recorded and ideally not made again by people working on similar projects.
  • Co-developed a hopper system to record all of the information about hoppers and wells which is then analyzed using machine learning tools.
  • Implemented Java Azure AD security libraries to help with OpenID Connect (JWT) protocol. This includes on behalf of access for BE to BE security integration.
  • Utilized the Azure Graph API for AD queries.
  • Migrated existing projects from Maven to Gradle and deployed to Azure using the Azure DevOps (VSTS) pipelines.
  • Handled DevOps requests for Azure Portal and Azure DevOps (VSTS) infrastructure.
Technologies: Cucumber, Apache POI, Swagger, Guava, Project Lombok, QueryDSL, Hibernate, Flyway, PostgreSQL, Microsoft SQL Server, OpenID, Jackson, Spring Security, Spring Data JPA, WebFlux, Boot, Spring, Spring 5, Azure DevOps, Azure, Gradle, Java 8

Software Developer

2014 - 2016
Now TV
  • Designed and implemented a voucher management system for the UK which will soon be rolled out across Europe.
  • Worked within a team to implement high concurrency microservices for our purchasing and billing applications.
  • Ensured that the deployments were made with ease using Jenkins and Cloud Foundry.
  • Implemented a working prototype of a JavaRX and a Retrofit application.
Technologies: Specs, OAuth, VMware Tanzu Application Service (TAS) (Pivotal Cloud Foundry (PCF)), ScalaTest, WireMock, REST Assured, Cucumber, Retrofit, RxJava, Swagger, Quartz, UnboundID, Flyway, MariaDB, Azure Active Directory, HATEOAS, Spring Security, Akka, spray, Spring Boot, Spring 4, Gradle, Scala, Java

Software Consultant

2013 - 2013
British Gas
  • Gathered requirements, designed, and implemented a solution to store boiler metrics for all online customers.
  • Coordinated with a third party to implement a REST API solution using JSON.
  • Stored all boiler metrics in HBase using a JDBC interface (Phoenix), ready for analytics.
Technologies: Validation, Hibernate, Apache Tomcat, JDBC, Phoenix, Spring, Cucumber, Mockito, JUnit, Gatling, VirtualBox, Vagrant, Jenkins, JDBI, Spring Security, HBase, Jackson, Debian Packaging, Gradle, Groovy, Java

Software Consultant

2009 - 2013
Sky UK
  • Added an API to the Sky search engine to allow all Sky departments to index their content for retrieval by any team.
  • Wrote the new Query API to allow other Sky teams to access content via Atom or RSS feeds (using Rome).
  • Implemented Spring security on all existing projects.
  • Added HTML editorial layers into our search views based on keyword matching.
  • Added improved technologies to the existing project; such as Quartz, JAXB, Hibernate with annotations, Rome, and Mockito.
  • Crafted the architectural design and implementation for the new guided search project.
  • Implemented a distributed caching system using Ehcache, JGroups, and Spring.
  • Developed two different prototype content recommendations engine from scratch and a user recommendation engine using Mahout.
  • Worked with a team to implement the metadata repository for all Sky content.
  • Designed and cowrote a real-time image scaling service for Sky users.
  • Rewrote the back-end auto-suggest service.
  • Designed and implemented a stateless security system for our REST APIs using Spring Security.
  • Implemented an automatic data archiving solution using Quartz and MySQL list partition tables.
Technologies: Autonomy IDOL Search, Spring, Mockito, Ant Design, Shell, Linux, MySQL, Oracle, Eclipse, jQuery, Jakarta Server Pages (JSP), Apache Tomcat, Jetty, Mahout, Hadoop, Memcached, JGroups, Ehcache, JAXB, Hibernate, Quartz, REST, Spring Security, Spring MVC, Jakarta EE, Java

Senior Java Developer

2008 - 2009
The Guardian
  • Worked as a software developer in a team of approximately 50 on a fully agile project.
  • Worked in the continuous improvement team which sought to improve the reliability and speed of the web site.
  • Implemented with a team the blog pages.
  • Codesigned and implemented Google AdSense into the Guardian site.
Technologies: Unix Shell Scripting, Hamcrest, Mockito, JAXB, Linux, Windows XP, Ajax, JavaScript, Oracle, Eclipse, Apache Tomcat, Resin, Spring Security, Apache Velocity, Spring MVC, Spring, Ehcache, Hibernate, Jakarta EE, Java

Java Team Leader

2006 - 2007
Macquarie Bank
  • Designed and implemented a risk management (compliance) system. It aggregated all global share positions from all the different divisions and locations in Macquarie.
  • Designed the database schema, application project, and Java architecture. This application had a high volume of transactions so we went with a combination of Hibernate and stored procedures for the batch processes.
  • Communicated with the business users to gather the project requirements.
  • Acted as the technical lead in a team of 4 developers.
  • Suggested a redesign for the Macquarie leasing system, including remote/web services.
Technologies: Unix Shell Scripting, Security, Web Services, Linux, Windows XP, JavaScript, Sybase, Eclipse, Apache Tomcat, WebLogic, WebSphere, JDBC, Spring, Apache Struts, Jakarta Server Pages (JSP), Ehcache, Hibernate, Jakarta EE, Java

Senior Java Analyst/Developer

2004 - 2006
MBF (Bupa Australia)
  • Delivered technology services to MBF in support of strategic initiatives. This includes architecture designs and requirements gathering on new and existing projects.
  • Designed and implemented a wide array of applications for over two years.
  • Converted applications and data from a legacy mainframe system to a new J2EE environment.
  • Used a wide selection of complementary technologies - such as Tibco messaging (EMS/JMS), BusinessWorks, Optra Forms, Oracle 9i Java functions (running within Oracle), Crystal Reports, and TopLink.
  • Developed a retail management system used by all MBF branches around Australia.
  • Built a real-time report printing to any branch in Australia.
  • Created a new J2EE-based application to replace the front and back ends of the existing health insurance software.
Technologies: Unix Shell Scripting, Business, TIBCO, Solaris, Windows, JavaScript, Oracle9i, Eclipse, TopLink, JBoss, WebLogic, JDBC, JMS, Apache Struts, Jakarta Server Pages (JSP), Enterprise Java Beans (EJB), Jakarta EE, Java

Now TV

I designed and implemented the voucher system for Now TV.
1997 - 2000

Bachelor's Degree in Computer and Mathematical Sciences

University of Western Australia - Perth, Australia


REST APIs, Quartz, Jackson, Joda-Time, HikariCP, AssertJ, jQuery, Autonomy IDOL Search, JDBC, JMS, TopLink, OpenID, QueryDSL, Guava, Apache POI, Selenium WebDriver, Mahout, JGroups, JAXB, JDBI, spray, RxJava, Retrofit, Vue


Gradle, Cucumber, Jenkins, Flyway, Jetty, Apache Tomcat, Shell, Amazon Simple Queue Service (SQS), Apache Maven, Bamboo, SemaphoreCI, REST Assured, WireMock, ScalaTest, Gatling, RPM, VirtualBox, Vagrant, Apache Ant


Spring, Spring Security, Hibernate, JUnit, Mockito, Spring Boot, Spring MVC, KOIN, Javalin, Ant Design, Apache Velocity, Apache Struts, Spring 4, Spring 5, Spring Integration, Jakarta Server Pages (JSP), Hadoop, Phoenix, Swagger, Akka, Bulma, WebFlux


Java, Kotlin, Java 8, JavaScript, Bash Script, Groovy, Scala, ECMAScript (ES6)


Microservices, Test-driven Development (TDD), Agile, Behavior-driven Development (BDD), Pair Programming, REST, Azure DevOps


Azure, Windows, Jakarta EE, Eclipse, Oracle, Windows XP, WebSphere, JBoss, Solaris, VMware Tanzu Application Service (TAS) (Pivotal Cloud Foundry (PCF)), Amazon Web Services (AWS), Linux, UnboundID, Oracle Database


Spring Data, MySQL/MariaDB, MySQL, Oracle9i, MariaDB, Spring Data JPA, Microsoft SQL Server, PostgreSQL, Azure Active Directory, Sybase, Memcached, HBase, H2


KMIP, Resin, Hamcrest, Unix Shell Scripting, WebLogic, Web Services, Security, TIBCO, Business, Debian Packaging, Validation, AWS Certificate Manager, Boot, Project Lombok, LDAP, Logback, Identity Server, Ajax, Ehcache, Specs, OAuth, HATEOAS, Cloud Foundry, Axios, Enterprise Java Beans (EJB)

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