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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. Living 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/

Professional 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.

• Migration to GitOps-based deployments.
• 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.
• Prototyped multiple possibly interesting Linux, Java and Python based technologies. 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 phase upgrading the complete Parking solution software solution for a client.

Phase 1 - Converting an existing end-user Visual Basic application talking to MS SQL to a REST-based web solution where I was responsible for the C# backend.

• 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 6 with reversed engineered scaffolded classes from our test data docker image.
• Implemented Gitlab CI/CD build procedures for complete solution.
• 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.

Phase 2 - Completely replace application and operating system on existing customer devices with a Qt5 application running on Alpine Linux 3.14, where I was resposible for the Linux installation.

• Created single fully automated Alpine Linux installation ISO image covering all four types of customer PC hardware and network configurations. It was a requirement 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.
• Implemented Gitlab CI/CD build procedures for the complete installation ISO image ready to flash to USB.
• Rebuilt Qt5 Alpine packages used by our Qt5 application to support instruction set in the oldest PC’s still used by customer as they did not support the full Pentium-family instruction set.
• 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.

Det Kgl. Bibliotek, 2014 - 2018

Senior Java Developer, using Ubuntu Linux.

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.

• Implemented protection mechanism as a maintainable high performance Apache Perl 5 FastCGI access checker protecting individual assets.

• Designed and created a library to alleviate the lack of local variables in Java 8 Streams.

• 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.

• Researched and presented “What’s new in Java 8” internally.

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

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 normalizing and verifying 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.

• 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

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.
• Performance analysis and database administration on Oracle under Solaris.

Scandiatransplant - Java Developer 2001 - 2003

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

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.

Student programmer 1992 - 1999

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

• Centralizing and automating system administration of heterogeneous systems, including Solaris, Irix, Linux, Windows, NeXT, Sony News, and FreeBSD.

Education

University of Southern Denmark:

• Master in Computer Science - 2000

Interests

• Amateur photographer - active in “Downstairs” photography club.
• Volunteer for Mensa in Denmark.
• Recording and converting videos with Danish subtitles from various sources to modern formats.
• 8-bit computing at Dansk Datahistorisk Forening, currently looking into writing new software in Rust.