Knud Werner - Lead Programmer, Architect, Deputy Product Owner

Leipzig, Germany

Experience

Mar 2020 - Nov 2024

4 years 9 months

Fürth, Germany

Lead Programmer, Architect, Deputy Product Owner

Bundesagentur für Arbeit

Completed the conversion from zPDV to STEP
Quality assurance of C++ and Perl sources (automated and manual)
Support in resolving incidents/errors in testing
Implemented a follow-up batch to add payment run numbers
Implemented the batch to distribute SGB 2 information to zKT
Supported replacing Solaris with Linux
Upgraded GCC 7.4 to GCC 9.3
Programmatically generated the Makefiles needed for the build from Borland projects
Added the new attribute “internship travel cost flag” to the benefits
Programmatically generated the XSD and WSDL files needed for the build from IDL files
Represented the product owner
Implemented the batch to execute one-time payments
Implemented a generator for Liquibase files
Implemented and maintained the regular anonymization of production data extracts
Supported the migration from SLES 12 to SLES 15
Supported the introduction of mTLS
Implemented the batch to send the deletion trigger to EDA BE
Organized the script directory
Explored options for introducing String-Latin
Reviewed and, if necessary, resolved the findings reported by CheckMarx
Supported PAP recalculations and general change notices
Implemented the so-called “minimal solution” for String-Latin
Converted ERP interfaces from SOAP to REST
Supported planning for implementing various technical and business topics (Register Modernization Act, cash register security, training costs, four-eyes principle, etc.)

Feb 2019 - Feb 2019

1 month

Cologne, Germany

Software Auditor

TÜV Rheinland

Created a software audit report (C++, approx. 800k LOC)

Jul 2017 - Dec 2017

6 months

Munich, Germany

Consultant

Anonymous Client

Consulting on blockchain and bitcoin topics

Feb 2017 - Mar 2018

1 year 2 months

Leipzig, Germany

Integrator

Tele Columbus / Primacom

Connected the Sky interface to Tele Columbus systems
Implemented new queues for service providers
Production support, especially regarding differences between Oracle 11 and 12

May 2016 - Dec 2019

2 years 8 months

Büdelsdorf, Germany

Senior Analyst, Programmer, Coach

Mobilcom-Debitel

Migrated Mobilcom-Debitel’s E-Plus customers to O2
Selected customers and processed data to and from E-Plus and O2
Test data management for the O2 migration
Identified services for re-billing according to BNetzA guidelines
Matched and merged roaming SMS partials for billing purposes
Pseudonymized customer data for testing according to GDPR
Bundled individual letters into shipments for the postal service provider
Reconciled DECOS and TCS systems with SAP (dealer commissions)
Migrated klarmobil customers from MySQL to ApiOmat
Performance testing with Gatling
API management with Apigee
Coached customer data cleansing
Production support
Visualized ApiOmat data
Performance tuning of various processes
Quality assurance through code review following Clean Code principles
Coached on common data mining and data science techniques
SCRUM methodologies

Feb 2015 - Feb 2016

1 year 1 month

Student

Self-study

HTML5
CSS
Scala
Clojure
MongoDB
Neo4j
Orient DB
Blockchain

Apr 2013 - Nov 2014

1 year 8 months

Hamburg, Germany

Senior Application Analyst, Application Manager

EOS IT Services

Advised on technical issues and guided further development
Redesigned field service interfaces and processes and supported their implementation
Designed and contributed to feedback documentation
Second and third level support for the collection software, especially field service orders and messages
Performed quality assurance measures during new version rollouts
Bug description and analysis, supported fixes, testing
Created ad-hoc reports for the business unit

Feb 2012 - Nov 2012

10 months

Nuremberg, Germany

Senior Data Scientist, Programmer, Agile Coach

Gesellschaft für Konsumforschung GfK

Designed algorithms for the “performance layer” and supported implementation
Optimized performance-critical areas (“hot spots”)
Conducted trainings (practical use of statistical methods in BI, data structures, algorithms, Perl)
Handled critical debug tickets
Software testing and review

Mar 2009 - Jul 2011

2 years 5 months

Elmshorn, Germany

Senior Data Scientist, Programmer

Talkline / Debitel / Mobilcom

Quality assurance (bill-to-bill) for migrating Debitel’s billing system to Talkline
Automated data cleansing of about 100 million name and address records
Migrated the billing archive and the “unbilled usage”
Prepared the migration of the billing system from Talkline to Mobilcom
Implemented EU roaming and SMS regulations
CGIs for automation and business development

Jan 2008 - Aug 2008

8 months

Darmstadt, Germany

Senior Architect, Programmer

Deutsche Telekom

Reverse Engineering of the IBM IMS data format
Creating adaptive processes and tools to measure data quality

Mar 2001 - Jun 2007

6 years 4 months

Düsseldorf, Germany

Senior Data Scientist, Architect, Programmer

Vodafone D2

Test and data coding tools.

Leipzig, Germany

Owner

Probits GmbH & Co. KG

Summary

Mathematician, Computer Scientist

Interests

Mathematics, statistics and geometry from Euclid to Scholz, theoretical computer science, complexity theory
(Meta) programming, compiler construction and (new) programming languages and paradigms
Chess, saxophone, soccer, philosophy, history, table tennis

Project focus

Data analysis, cleaning and visualization, data matching, data science
Migrations, quality assurance and performance tuning
Re-mastering legacy software (from reverse engineering to redesign and re-engineering)
Innovative, custom algorithms for challenging customer problems
Code review, workshops, training

Strengths