cv

Thorbjørn Ravn Andersen

Senior Backend Developer who has worked with Java for 20+ years, primarily on Linux-like platforms, and with C# for a few projects. Continuous Integration for 12 years expanding into Docker for the last 5 years, and Continuous Deployment and cloud technologies for the last 2. Various databases mostly PostgreSQL, but also h2, SQL Server (dockerized with test data), MySQL, DB2/400 and Oracle 8i. Located in Central Copenhagen, Denmark.

Phone	+45 60 62 03 45
Email	tra@ravnand.dk
CV	https://ravn.github.io/cv/
GitHub	https://github.com/ravn
StackOverflow	https://stackoverflow.com/users/53897/

Experience:

Udvikings- og Forenklingsstyrelsen - 2022-present

Java developer turned DevOps for Spring Boot based backends written in Java and Kotlin deployed to Kubernetes accessed from mobile apps frontends.

• Worked on consolidating Jenkins-based pipelines across products building and deploying backends to our on-prem Rancher Kubernetes clusters.
• Connectivity and external networking access allowing our frontends to reach the backends inside the UFST network.
• Investigated, prototyped and demonstrated multiple possibly interesting Linux, Java and Python based technologies internally. This includes eBPF, OpenAPI, SonarQube, Cucumber, Flight Recorder Fire Graphs and Jira REST API.
• Create and maintain YAML files for Continuous Deployments.
• Enhanced backends to provide monitoring information through Spring Boot actuators allowing backend health wallboards using Spring Boot Admin.
• Introduced code near documentation using AsciiDoc allowing live code snippets in IDE and Confluence.

Viking Software - 2021

Project employment in two phases. First converting an existing end-user Visual Basic application talking to MS SQL to a REST-based web solution. Secondly completely replacing application and operating system on existing customer devices with a Qt5 application running on Alpine Linux. I was responsible for the C# backend and the Linux installer in the two phases.

• Created single fully automated Alpine Linux installation ISO image covering all four types of customer PC hardware and network configurations. It was a goal that the technician doing the installations in the field should not have to do anything requiring a keyboard during the installation. This was both very technically challenging and very rewarding to do.
• Used git (command line + Gitlab) and Docker on daily basis for development.
• Reimplemented all existing customer reports data extraction written in SQL inside Visual Basic using multiple databases as C# .NET 3.1 endpoints using Entity Framework with reversed engineered scaffolded classes from our test data docker image.
• Implemented Gitlab CI/CD build procedures for all of our deployed artifacts. This was several C# components, the React web frontend, the Qt5 application, and the installer ISO generation.
• Rebuilt Qt5 Alpine packages used by our Qt5 application to support instruction set in the oldest PC’s still used by customer.
• Created and maintained SQL Server 2019 Docker image hosted on internal Gitlab used by team to develop with test data provided by customer in various forms, including incremental changes.
• NAT-router functionality for built-in GSM network connection.
• Designed and implemented rsync server layout for downloading new location specific versions of the Qt5 application with a minimum of network traffic over GSM.

TDC Group/Nuuday - Aarhus/Copenhagen 2018 - 2021

Senior Java Developer

Working as developer and devops on internally faced applications being migrated to in-house Kubernetes clusters (OpenShift/Rancher)

• Wrote new microservices in Java using Spring Boot interfacing legacy applications not designed for cloud usage, including Docker image research and support.

• Developed build+deploy pipelines for Jenkins on Kubernetes for “automatically build and deploy commits on new branches based on Jira issues”. First for OpenShift, then for Rancher + ArgoCD.

• Migrated traditional .NET application to being built and deployed automatically, including selecting and extending Docker base images for in-house use.

• Mentoring younger developers in tools and programming practices through e.g. code review in BitBucket.

• Leveraged eBPF for out-of-process troubleshooting for Linux deployments.

• Learned Python and C# for development and devops work.

• Maintain existing legacy applications in C# deployed with Bamboo.

• Migrate existing devops pipelines to GitHub Actions.

• Extensive documentation using Markdown in GitHub/Bitbucket.

Statsbiblioteket / Det Kgl. Bibliotek - Aarhus 2014 - 2018

Senior Java Developer

Worked with various aspect of digital preservation. Most work was done as Open Source on GitHub.

• Ingest workflow archiving the daily Danish newspapers in our in-house preservation system. Emphasis has been on using Streams to make processing simpler, and dependency injection of configuration key-value strings using Dagger 2 https://github.com/statsbiblioteket/digital-pligtaflevering-aviser-tools

• Reimplemented existing protection mechanism written in Clojure in Perl 5 as a maintainable high performance Apache FastCGI access checker protecting individual assets. https://github.com/statsbiblioteket/newspaper-fastcgi-ticket-checker

• As a side project, designed and created a library to alleviate the lack of local variables in Java 8 Streams. https://github.com/statsbiblioteket/streamtuples

• Assembled newspaper edition PDF’s from individual JPEG2000 images using Java and XSLT.

• Converted existing legacy ant-based Java subversion repository to IDE-agnostic Maven project tree in git located on Github with jUnit 4 tests and upgraded to Java 8. https://github.com/netarchivesuite/netarchivesuite

• Part of Architect group where we looked at creating a git friendly CI/ CD environment where multiple branches could be integration tested in a controlled environment. Initial work was done with OpenShift.

• Researched and presented “What’s new in Java 8” internally. Slides at https://github.com/ravn/java8-presentation/raw/master/java-8-at-SB-2016-02-26.pdf

• Updated existing projects to build and work with Java 9+ and jUnit 5.

Workplace is a Linux shop developing in-house Java applications with every developer choosing his/her own flavor. I used Ubuntu from 14.04 up to now 18.04 LTS as my daily work environment with initially Eclipse and then IntelliJ Ultimate. We use VirtualBox, Vagrant and Docker to handle extra instances as needed.

Kewill / Four Soft Denmark / Transaxiom 2005 - 2014

Senior Java Developer in an agile Cobol shop.

The core product is a COBOL-based Transport Management System running on the IBM i (previously AS/400) platform which fully supports Java.

• Researched and wrote components in Java for those tasks not easily done in COBOL, like handling XML, image transformations and network transportation of data using a variety of protocols.

• Co-designed and implemented a central API allowing the usage of Java applications as COBOL-components. As these usually run unattended they need to be extremely robust and produce high quality logs for offline debugging.

• Implemented XSD schema checker filter to ensure the validity of outgoing XML.

• Converted our complete Java source base to Maven to emulate our COBOL workflow, facilitate Continuous Integration and become independent of Eclipse. Latest work was on Continuous Delivery and artifact traceability.

• Introduced Test Driven Development to document and clarify functionality of own code and third party jars.

• Wrote a Java EE 6 Web Profile web application for warehouse access for the customers of our customers customers.

• Converted our legacy CVS repository to several small git repositories while maintaining history.

• Introduced JUnit 4 based integration tests.

• Introduced JSR-223 scripting to allow extending behaviour in production without having to do a full redeploy of the component.

• Used Groovy to get class annotations for runtime defined JAX-WS based web services.

• Researched and implemented JSR-330 Dependency Injection to emulate IBM i “library lists” at runtime. Used Guice, Weld and Dagger as engines.

• Used the Cajo remote procedure call platform to launch on remote server, but debug in local IDE.

Acure

Java Developer 2003 - 2004 (2 years)

Electronic Health Record system provider.

• Developer on the medication module EPM, which was a Swing-based Java EE application client, and FOP-based print generation. Also did performance analysis and database administration on Oracle under Solaris.

Scandiatransplant Java Developer 2001 - 2003 (3 years)

Organ Exchange database organization for Scandinavia.

• Developed new JSP+Struts based web frontend on Solaris for the existing Oracle database.

Stibo Systems Java Developer 2000 - 2001 (2 years)

Product catalogs in print, CD-ROM and on the web.

• Worked on online catalog JSP site backed by Oracle 8i.

• Automated an SGML to Oracle data publication workflow by using XML-data and the latest XSLT-tools, and optimized bulk data loading with SQLLDR, JDBC and Perl DBI.

Unixsnedkeren Freelance Consultant 1999 - 2000 (2 years)

Freelance consultant in Perl, XML, XSLT, FreeBSD, Linux and Java.

Student programmer, various locations 1992 - 1999 (8 years)

Unix system administrator at IMADA, MIP, Amrose and Center for ProteomAnalyse at Odense University.

• Built expertise in centralizing and automating system administration of heterogeneous systems, including Solaris, Irix, Linux, Windows, NeXT, Sony News, and FreeBSD.

Education

Syddansk Universitet / University of Southern Denmark Master’s degree, Computer Science · (1987 - 2000)