Daniel Hiller

History

• May 2019 - today

  Senior Software Engineer, Red Hat, Remote

  KubeVirt CI engineer

  Goals

  • Keep the KubeVirt CI system up and running
  • Monitor and reduce number of flaky tests for kubevirt/kubevirt
  • Automate workflows for updating the KubeVirtCI environment for the KubeVirt project to support testing with latest K8s versions
  • Work on automation surrounding automated test execution for KubeVirt

  Functions

  • Maintain and extend functionalities surrounding the KubeVirt GitHub organization
    • regarding automated unit and e2e testing, also
    • around KubeVirt GitHub org, repo, and team automation
  • Create kubectl-virt-plugin that integrates virtctl into the kubectl plugin mechanism via the krew plugin manager
  • lead meetings to discuss taking measures for monitoring and reducing number of flaky tests for kubevirt/kubevirt
  • create and maintain tooling to support reducing number of flaky tests
  • Implement an automated deployment for the Prow system
  • Code reviews
  • Regular attendance of community meetings, voicing community issues, triage of new GitHub issues and PRs
  • Speak at conferences about KubeVirt and flaky tests

  Technologies

  Kubernetes, Golang, Bazel, Prow, GitHub API, Jenkins, Jira API, Bash

• May 2018 - Apr 2019

  Software Developer, arvato, Bielefeld

  NMVS

  Goals

  Work on the National Medication Verification System, which is part of the EMVO initiative.

  Functions

  • Maintenance and development of the internal systems, concerning the modules client, server, portal
  • Autonomous development of technical specifications
  • Documentation of customer requirements and concepts in Confluence
  • Execution and accompanying of automated tests

  Technologies

  Java, XML, SOAP, Maven, SVN, Confluence

• Dec 2016 - Apr 2018

  Staff Software Engineer, Intuit, Münster

  Machine Learning Platform

  Goals

  Create an internal, company-wide REST service providing a single API for hosting any number of machine learning models to allow real-time predictions.

  Functions

  • Create/extend cloud infrastructure, i.e. bastion, proxying, routing etc.
  • Create Spring Boot application with authentication and messaging
  • Maintain/extend development pipeline
  • Create and deploy docker containers to AWS sagemaker

  Technologies

  AWS services (SageMaker, EC2, S3), Docker, Hashicorp tools (Terraform, Packer, Vagrant, Consul), Nginx, HAProxy, Chef, Bash, Shellcheck, Bat shell testing, Java, Spring, Spring Boot, Gradle, GIT

  ---

  Bring real-time data store into AWS

  Goals

  Bring an existing Java real-time data store that supports fast reads as well as writes into AWS

  Functions

  • Create/extend cloud infrastructure, i.e. bastion, proxying, routing etc.
  • Adjust Java application, i.e. integrate auth and messaging
  • Maintain/extend development pipeline

  Technologies

  AWS, Terraform, Packer, Vagrant, Consul, Bash, Java, Kafka, Cassandra, Maven, GIT

  ---

  Overall responsibilities

  • Performing code reviews
  • Establishment of continuous integration and deployment via Github Enterprise and Cloudbees, i.e. automated build triggers
• Jul 2014 - Nov 2016

  Senior Java Developer Kern-CMS, Wolters Kluwer Deutschland, Münster

  Product-Preprocessor

  Goals

  Automate production lines for preproduction of raw text in XML format and collection of associated files

  Benefits

  Replacement of manual file conversion and manual collection of files

  Functions

  • Concept and implementation
    • Spring and Camel based Java backend as standalone application
    • Modularized feasibility checks and production steps
    • Framework for execution of checks and production steps
    • REST services in source and target system
    • REST clients
    • JAXB serialization of production definition
    • Streaming of raw data from database
    • Persistence for logging of executed production tasks
  • Bringing prototype into service and integration of required interfaces

  Technologies

  Java, JAXB, XSLT, Xpath, Spring, Camel, Tapestry, JPA, Oracle, Maven, Git, Jira, Stash, Confluence

  ---

  Overall responsibilities

  • Execution of code reviews
  • Stash
    • Installation and maintenance of corporate instance
    • Creation and configuration of repositories
    • Establishment of continuous integration and deployment via Stash and Jenkins
  • Internal talks
    • “Introduction to GIT”
    • “Code reviews with Stash”
    • “Boyscouts vs. Broken Windows” (general talk about clean coding and technical debt)
  • Support of colleagues regarding questions and problems about topics GIT, Clean Code, architecture, database migration during deployments
  • Creation of scripts to analyze application health on target systems
  • Creation of scripts to control and update deployed applications
    • Administering, creation of jobs, establishment of Jenkins triggers
• Jul 2012 - Jun 2014

  Java Developer Payment Frontends, Zalando AG, Dortmund

  Process Monitoring

  Goals

  Create a live monitoring frontend for internal processes

  Benefits

  Early warnings on unusual changes of key data for supervised systems lead to noticing imminent risks early

  Functions

  • Concept for architecture and data retrieval
  • Concept for data structure of frontend display
  • Implementing REST services
  • Persistence
    • Creation of PostgreSQL functions to save and load transformed data
    • Creation of database tables for recording key data
  • Transformation of backend data into data objects for frontend
  • Caching integration

  Technologies

  Java, Python, Bash, Javascript/AngularJS, Spring (MVC, REST), Quartz, Ehcache, PostgreSQL, Maven, Git, Jira, Stash

  ---

  Payment Forensics

  Goals

  • Implement a comparison tool for executed vs. expected payments and refunds
  • Analysis, categorization, persistence and reporting of faults for further processing
  • Implement frontends and reports for distribution to responsible departments

  Benefits

  • Responsible departments and management are provided with necessary tools
  • Transaction errors are revealed and can be corrected
  • Categorizing error categories makes them measurable

  Functions

  • Implementation of web frontend, services and persistence
  • Implementation of jobs for data processing in backend, i.e.
    • Aggregation of data from corporate database systems
    • Import of data from external systems
    • Categorizing deviation cases
  • Implementation of persistence
    • Creation of table structures
    • Writing stored procedures
  • Responsibility for operation and advancement of the system
  • Maintenance: improvement of implementation and architecture

  Technologies

  Java, Python, Bash, GWT/SmartGWT, Spring, Quartz, Ehcache, PostgreSQL, Maven, SVN, Git, Jira, Fisheye, Crucible, Stash

  ---

  Overall responsibilities

  • Code reviews
  • Deployment to target systems
  • Support of colleagues regarding several topics, i.e. testing and refactoring, java development, GIT
  • Tech talks: Clean Code, Introduction to IntelliJ, Refactoring
  • Data analysis
  • Deputy team lead
    • standups, iteration planning, retrospectives
• Sep 2002 - Jun 2012

  Software-Developer Java, dbap GmbH, Münster

  dStore webservice_SmartGate

  RESTful Webservice for the dStore-Plattform (Dec 2008 - Jun 2012)

  Goals

  Enable access to dStore data returned in XML via RESTful HTTP

  Benefits

  • Reducing database load
  • Simplification of data retrieval for frontend web development
  • Standardization of data access
  • Removal of a required legacy data access library
  • Enabling full text search on product data

  Functions

  • Technical lead
  • Development of prototype
  • Converting prototype to operational backend
  • Introducing an intermediate layer for data retrieval cached with Spymemcached to reduce database load
  • Integration of Saxon as replacement for standard JAXP implementation to support newer XSLT version
  • Integration of Lucene to
    • Integrate full text search and
    • have secondary data store to further reduce database load
  • Conversion from ant to maven multi module build
  • Integration of Artifactory as Maven repository for hosting of corporate artifacts
  • Introducing Jenkins as CI server to standardize build process
  • Introducing Mockito to reduce test dependencies
  • Integration of online help system for use by frontend developers with Velocity and XML
  • Accompanying bringing the system into production
  • Third level support

  Technologies

  Java, Restlet, JAXP, Saxon, Memcached, Lucene, Velocity, Sybase ASE, Ant/Maven, SVN/Git

  ---

  Customer project Selenium Webtests (2011)

  Goals

  Create a project for testing crucial website functionality

  Benefits

  • Securing crucial order process functionality
  • Automation of manual test execution
  • Automation of browser specific testing

  Functions

  • Initial project setup with Ant and TestNG
  • Creation of parameterized basic test structure to build upon
  • Conversion to maven

  Technologies

  Java, Selenium, TestNG, Ant/Maven, Jenkins

  ---

  dStore admin_SmartGate

  Administration software for dStore platform (2002 - 2009, Jun 2012)

  Goals

  Replace PHP based administration backend

  Benefits

  • Standardization of administration interface
  • Conceptional simplification for end users
  • Simultaneous display of all data required for several use cases
  • Simplification of end user workflow by providing standardized desktops
  • Simplification of customer support

  Functions

  • Technical lead
  • Evaluation of RMI as architecture base
  • Prototyping
  • System development
  • Introduction of Scrum to stabilize development process
  • Introduction of quality metrics and automated tests for quality assurance
  • Implementing an own CI server based on Ant and shell scripts
  • Implementing the concept of desktops
  • Creation of installers
  • Implementing automatic update process, later replaced by Java Web Start
  • Integration of a plugin concept to integrate customer specific modules
  • Migrating project from Ant to Maven
  • first and second level support

  Technologies

  Java, JDBC, RMI, Infonode Docking Windows, Swing, SwingX, JasperReports, Java Webstart, CVS, SVN, Git, Ant, Maven

  ---

  Customer project “Integration Creditreform/Boniversum CEG” (2008)

  Goals

  Integrate Creditreform/Boniversum CEG into order process

  Benefits

  automated determination of granted payment methods during order taking

  Functions

  • Implementation with PHP
  • Integration into order taking

  Technologies

  PHP, CURL

  ---

  Customer project “Optimization of article data retrieval for online shops” (2006)

  Goals

  Optimize retrieval of required article data for frontend display

  Benefits

  • Simplification of article data retrieval by web frontend programmers
  • Load reduction on database by using Memcached als intermediate layer

  Technologies

  PHP, Memcached

  ---

  Customer project “Custom Order-Management” (2005)

  Goals

  Develop an order management system from customer requirements based on dStore platform and admin_SmartGate (see above)

  Benefits

  • Mapping of business processes
  • Optimization of order taking

  Functions

  • Initial development and project setup
  • Integration of JasperReports for order printing
  • Enable creation of custom reports (customer can select printed columns via GUI)
  • UI development

  Technologies

  Java, JDBC, JasperReports, Swing

  ---

  Customer project “Online-Shop relaunch” (2004)

  Goals

  Relaunch customer web shop

  Benefits

  • New design
  • Integration of new functionality

  Functions

  • Implementation of community module based on PHP
  • New search functionality

  Technologies

  PHP, HTML, CSS, Sybase ASE

• Feb 2001 - Aug 2002

  Software-Developer Microsoft Visual Basic 6, ITData Consult GmbH, Münster

  Customer project “Software for executive Consultants”

  Software for administering customer documents of an executive Consultant

  Goals

  • Replace Microsoft Excel based documents by a document management with Excel integration

  Benefits

  • Simplification for the customer
  • Enabling network functionality
  • Integration of a mandator concept

  Functions

  • Implementation based on Visual Basic 6
  • Creation of installers with Installshield
  • Test of installers with VMWare
  • first level support

  Technologies

  • MS Visual Basic 6, MS SQL Server, MS Excel (OLE)

  ---

  Web presence of ITData Consult GmbH

  Creation of the web presence for the company

  Goals

  Create the company web presence

  Benefits

  • Possible customer acquisition by web presence
  • Simplification of customer contact by providing contact data and an interactive form for customer requests

  Functions

  Implementation based on HTML, CSS, ASP

  Technologies

  HTML, CSS, MS ASP

• 1998 - 2001

  Apprenticeship as Qualified IT specialist software development, G.E.P.A.R.D. Software GmbH, Münster

  Customer project - “Statistics application (Java)” (2000 - 2001)

  Re-implementing the application based on Swing and JDBC accessing IBM AS/400

  Goals

  Create a new version of the existing software

  Benefits

  • Platform independence
  • Direct communication with AS/400
  • Removal of intermediate layer for export of visualized data

  Functions

  • Evaluation of possibilities for data access via JDBC for IBM AS/400
  • Concept and implementation of prototype ** Creation of stored procedures ** Creation of concept for wizard

  Technologies

  • Java, Swing, JDBC, IBM AS/400

  ---

  Customer project “Statistics application” (1998 - 2001)

  Maintenance of statistics application based on MS VB 6

  Goals

  Adoption of support and advancement

  Benefits

  • Support possible by multiple employees
  • Advancement and support still possible after quitting of initial developer

  Functions

  • First level support
  • Bug fixing
  • Advancement
  • Distribution of software updates

  Technologies

  • MS Visual Basic 4, MS Access, IBM AS/400
• 1995 - 1998

  Software-Developer Microsoft Visual Basic 4, Ahrens GmbH, Lüdinghausen

  Software for administration

  Functions

  Participation in implementation

  Technologies

  MS Visual Basic 4

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