Oliver Lehmann

Angestellt, Software Developer, Gothaer Konzern

Köln, Germany

Skills

Softwareentwicklung
Performance Tuning
Anforderungsmanagement
Projektleitung
Software Architektur
Warenwirtschaft
Microservices
Domain Driven Design
MapR
Infinispan
Guava
MapR ES
Kafka Streams
IBM DB2 for z/OS
Oracle
MySQL
PL/SQL
SQL
Java
PHP
C
AWK
Shell
Perl
Spring Framework
Spring Boot
REST
HTML
CSS
XML
JSON
Linux
FreeBSD
AIX
UNIX
Windows
TSO/ISPF
Apache
JBoss Enterprise Application Platform
JBoss Data Grid
Git
SVN
JIRA
IntelliJ IDEA
Eclipse
JProfiler
Kubernetes
Rancher
Docker
Helm
Ansible

Timeline

Professional experience for Oliver Lehmann

  • Current 1 year and 7 months, since Oct 2022

    Software Developer

    Gothaer Konzern
  • 1 year and 10 months, Dec 2020 - Sep 2022

    Solution Architect

    REWE Systems GmbH

    Designing solution architectures and advising the dev team on how to transform 20-40 year old monolithic applications like a central subsidiary ledger into a microservice or "modulith" architecture. Also considering aspects like reasonability, cost efficiency as well as "make or buy". Strongly focussing on asynchronous streaming solutions for application interaction instead of synchronous online (web-)services or the currently predominant database integration solutions.

  • 7 years and 8 months, Apr 2013 - Nov 2020

    Senior Software Engineer & Software Architect

    REWE Systems GmbH

    Domain-Driven-Design, System Architecture, Review, Performance Tuning and Development of RESTful multi-layer Services for the REWE Merchandise System in Java using Spring Boot, RESTEasy, Jackson, MapR, MyBatis, Infinispan, Guava, DB2. Long term (5+ years) project: reimplementation of the legacy monolithic merchandise system by using the above stated mindset, tools and frameworks.

  • 7 years and 6 months, Oct 2005 - Mar 2013

    Senior Software Engineer

    METRO SYSTEMS GmbH

    2011-2013: Mobile Store Merchandise System on a Handheld, Technologies: Java/Spring, Tasks: Functional+Technical Specification, Development // 2005-2013: Store Merchandise and Logistic System, Technologies: Oracle PL/SQL, Forms, Reports, Tasks: System Architecture&Integration, Functional + Technical Specification, Development, Code Review, Performance Tuning, International Rollout, Project Coordination

  • 2 years and 9 months, Jan 2003 - Sep 2005

    Application Engineer

    METRO SYSTEMS GmbH

    Implementation of a Job Scheduling for batch processing using the Tivoli Workload Scheduler for an inhouse developed and international used centralized Oracle based Merchandise Management System.

  • 1 year and 10 months, Feb 2001 - Nov 2002

    Developer / System Administrator

    brainwire GmbH

    Development Community Solutions (PHP, MySQL) + System Administration (Linux)

  • 3 years and 6 months, Aug 1997 - Jan 2001

    Apprentice

    BASF Schwarzheide GmbH

Languages

  • English

    Fluent

  • German

    First language

  • Russian

    Basic

Interests

Software design
Software development
FreeBSD
Z8001 based computer systems
8Bit Microcontroller
Genealogy

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