Jacqueline Krech - Senior Java/Kotlin Fullstack Cloud DevOps

Q: Where is Jacqueline based?

Jacqueline is based in Cologne, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Jacqueline speak?

Jacqueline speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Jacqueline have?

Jacqueline has at least 10 years of experience. During this time, Jacqueline has worked and for 5 different companies . The average length of individual experience is 2 years and 11 months . Note that Jacqueline may not have shared all experience and actually has more experience.

Q: What companies has Jacqueline worked for in recent years?

In recent years, Jacqueline has worked for OTTO and HUK Coburg .

Q: Which industries is Jacqueline most experienced in?

Jacqueline is most experienced in industries like Retail , Insurance , Media, and Entertainment and Publishing .

Q: Which business areas is Jacqueline most experienced in?

Jacqueline is most experienced in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

Q: Which industries has Jacqueline worked in recently?

Jacqueline has recently worked in industries like Retail and Insurance .

Q: Which business areas has Jacqueline worked in recently?

Jacqueline has recently worked in business areas like Information Technology (IT) and Quality Assurance (QA) .

Q: Does Jacqueline have any certificates?

Jacqueline has 4 certificates . Among them, these include: Principles Of Reactive Architecture , Oracle Certified Professional Java SE 6 Programmer , and Sophora Certified Administrator (SOCAD) .

Q: What is the availability of Jacqueline?

Jacqueline is immediately available full-time for suitable projects.

Recommended expert

Cologne, Germany

Experience

Jan 2022 - Apr 2025

3 years 4 months

OTTO

Design, development, and monitoring of microservices
Migrating functions from a monolithic system into separate microservices
Designing and implementing new microservices (backend and frontend)
Setting up and maintaining a CI/CD pipeline (GitHub Actions)
Configuring cloud infrastructure with AWS CDK and Terraform
Designing and implementing event-driven communication with AWS SNS/SQS and Apache Kafka
Ensuring code quality through Test Driven Development (TDD), static code analysis, and Clean Code

Jul 2021 - Dec 2021

6 months

HUK Coburg

Creating microservices to replace the existing claims reporting system
Migrating services to the OpenShift platform using Test Driven Development (TDD)
Working as a team member in an agile Scrum team
Applying Clean Code principles and continuous integration to ensure software quality

Oct 2017 - Feb 2020

2 years 5 months

Cologne, Germany

AXA

Enhancing the customer portal with a focus on designing and building self-contained services
Maintaining and extending the existing service architecture
Working as a team member in the Scrum team to integrate self-services
Ensuring software quality through Behavior Driven Development (BDD) and Test Driven Development (TDD)
Creating APIs for use by another team in app development
Configuring the deployment process with AWS CloudFormation
Monitoring services using the ELK Stack, Grafana, and Prometheus

Jul 2016 - Sep 2017

1 year 3 months

Cologne, Germany

REWE digital

Enhancing the customer portal
Replacing a monolith with multiple microservices using Kotlin and Java (backend and frontend)
Maintaining and extending the existing service architecture
Designing and implementing event-driven communication with Apache Kafka
Integrating public APIs of a payment service provider
Ensuring software quality through Test Driven Development (TDD) and Domain Driven Design (DDD)
Continuous integration and continuous delivery
Monitoring services using the ELK Stack, Grafana, Prometheus, and a custom monitoring service

May 2014 - Jun 2016

2 years 2 months

Cologne, Germany

WDR mediagroup

Adapting and extending the Sophora (Subshell) content management system to meet client requirements
Extending a media database with a graphical web interface to manage audio, video, and images
Creating documentation (concepts, technical docs, user manuals, operations manuals)

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Retail (4.5 years), Insurance (3 years), and Media and Entertainment (2 years).

Retail

Insurance

Media and Entertainment

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (9.5 years), Product Development (1 year), and Quality Assurance (0.5 years).

Information Technology

Product Development

Quality Assurance

Skills

Programming Languages

Java (Java Ee, Java Se, Java From Version 5, Jsf 2.0, Jsp)
Kotlin
Groovy
Typescript/javascript (Svelte, Vue, React, Node.js, Jquery, Mootools, Ajax, Grunt, Bower)

Frameworks, Technologies

Microservices
Self Contained Services
Spring (Framework, Boot, Mvc, Data, Security, Integration)
Micronaut
Web Services (Rest, Soap, Apache Cxf, Jax-ws)
Aws Cloud
Apache Kafka
Docker
Jetty
Apache Tomcat
Doctoolchain
Java Server Faces (Primefaces)
Apache Solr
Jaxb
Quartz
Velocity
Handlebars
Freemarker

Methodologies

Domain Driven Design (Ddd)
Behavior Driven Development (Bdd)
Test Driven Development (Tdd)
Continuous Integration (Ci)
Continuous Delivery (Cd)
Devops
Scrum
Kanban
Clean Code

Logging, Monitoring

Elk Stack
Grafana
Prometheus

Standards

Openapi
Json
Asciidoc
Markdown
Xml
Xsd
Xsl
Uml
Sql
Html
Css

Databases

Jpa
Hibernate
Mongodb
Dynamodb
Redis
Postgres
Mysql
Oracle
Couchdb
Jdbc

CMS

Sophora
Joomla
Wordpress
Teamsite
Jamstack (Jekyll)

Testing

Junit 4/5
Testng
Spock
Geb
Htmlunit
Jsfunit
Thucydides
Mockito
Powermock
Mockk
Pact
Cucumber
Mutation Testing (Pitest, Stryker)
Soapui
Postman
Insomnia

Build, Deployment

Github
Hudson/jenkins
Sonarqube
Terraform
Openshift
Aws Cloud

Project Environment

Git
Svn
Intellij
Eclipse
Spring Tool Suite
Gradle
Maven
Jira
Confluence
Bamboo
Stash
Consul
Openproject
Visual Paradigm
Puppet
Apache Ant
Linux
Windows
Mac

Languages

German

Native

English

Advanced

Certifications & licenses

Principles Of Reactive Architecture

Lightbend/IBM

Oracle Certified Professional Java SE 6 Programmer

Oracle

Sophora Certified Administrator (SOCAD)

Sophora

Sophora Certified Delivery Developer (SOCDD)

Sophora

Profile

Created

August 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Jacqueline based?

Jacqueline is based in Cologne, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Jacqueline speak?

Jacqueline speaks the following languages: German (Native), English (Advanced).

How many years of experience does Jacqueline have?

Jacqueline has at least 10 years of experience. During this time, Jacqueline has worked and for 5 different companies. The average length of individual experience is 2 years and 11 months. Note that Jacqueline may not have shared all experience and actually has more experience.

What companies has Jacqueline worked for in recent years?

In recent years, Jacqueline has worked for OTTO and HUK Coburg.

Which industries is Jacqueline most experienced in?

Jacqueline is most experienced in industries like Retail, Insurance, Media, and Entertainment and Publishing.

Which business areas is Jacqueline most experienced in?

Jacqueline is most experienced in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

Which industries has Jacqueline worked in recently?

Jacqueline has recently worked in industries like Retail and Insurance.

Which business areas has Jacqueline worked in recently?

Jacqueline has recently worked in business areas like Information Technology (IT) and Quality Assurance (QA).

Does Jacqueline have any certificates?

Jacqueline has 4 certificates. Among them, these include: Principles Of Reactive Architecture, Oracle Certified Professional Java SE 6 Programmer, and Sophora Certified Administrator (SOCAD).

What is the availability of Jacqueline?

Jacqueline is immediately available full-time for suitable projects.

What is the rate of Jacqueline?

Jacqueline's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.