Arkadius Sikora - Architect; Senior Developer; Full Stack Developer; DevOps Lead

Q: Where is Arkadius based?

Arkadius is based in Dortmund, Germany .

Q: What languages does Arkadius speak?

Arkadius speaks the following languages: German (Advanced), English (Advanced), Polish (Advanced) .

Q: How many years of experience does Arkadius have?

Arkadius has at least 13 years of experience. During this time, Arkadius has worked in at least 12 different roles and for 12 different companies . The average length of individual experience is 1 year and 1 month . Note that Arkadius may not have shared all experience and actually has more experience.

Q: What is Arkadius's latest experience?

Arkadius's most recent position is Architect; Senior Developer; Full Stack Developer; DevOps Lead at Bitmarck Holding GmbH .

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

In recent years, Arkadius has worked for Bitmarck Holding GmbH and Signal Iduna Gruppe .

Q: Which industries is Arkadius most experienced in?

Arkadius is most experienced in industries like Insurance , Information Technology (IT) , and Metals and Mining . Arkadius also has some experience in Healthcare , Education , and Banking and Finance .

Q: Which business areas is Arkadius most experienced in?

Arkadius is most experienced in business areas like Information Technology (IT) , Product Development , and Operations . Arkadius also has some experience in Quality Assurance (QA) .

Q: Which industries has Arkadius worked in recently?

Arkadius has recently worked in industries like Insurance and Healthcare .

Q: Which business areas has Arkadius worked in recently?

Arkadius has recently worked in business areas like Information Technology (IT) , Product Development , and Operations .

Recommended expert

Dortmund, Germany

Experience

Oct 2022 - Dec 2024

2 years 3 months

Architect; Senior Developer; Full Stack Developer; DevOps Lead

Bitmarck Holding GmbH

Requirements engineering for the ombudsman office and creating technical user stories for EPA V3
Handling of objections and revocations by email and letter with high transaction volumes
Coordination with other teams on interfaces
Designing a highly available, high-throughput solution on OpenShift with Java backend microservices
Implementing and extending microservices
Setting up infrastructure for deployment on OpenShift/Kubernetes including Jenkins pipelines
Integrating with BitIAM, TI-M Fachdienst, Consent Keeper and FDV
Gathering requirements from DevOps operations and business units
Continuous integration and Scrum practices
Use cases: health fund merger, opt-out, load test, objection management
Automating integration tests and adding features, including Spring Boot 3 updates

Jan 2021 - Sep 2022

1 year 9 months

Senior Full Stack Developer; Product Owner

Signal Iduna Gruppe

Implementation of microservices for backend and frontend
Deployment on OpenShift
Product responsibility and technical leadership
Continuous integration and Scrum practices

Jan 2018 - May 2020

2 years 5 months

Senior Developer

Beutlhauser

Implementation of features for backend and frontend
Deployment on AWS
Implementation of a progressive web app
Continuous integration and delivery

Jun 2016 - Dec 2017

1 year 7 months

Senior Full Stack Developer

COMLINE Computer + Softwarelösungen AG

Development of microservices for the CSP Java backend
Mobile app development for Android and iOS
Setup of cloud-service-platform infrastructure

Apr 2016 - May 2016

2 months

Java Backend Developer

KION Group IT

Software development with Java 8 and Criteria API
Implementation of REST APIs with JSON

Jan 2014 - Dec 2015

2 years

Development Engineer

Sophos Technology GmbH

Frontend development with AngularJS and Bootstrap based on design specifications
Backend development with Java 7 Spring Framework 4.0
Support for Windows 10 Mobile MDM in the Sophos Cloud
Integration of Sophos Mobile Security into the cloud
Porting of the mobile component to Sophos Cloud V3
Software development in Ruby for Sophos Cloud V2 mobile MDM on iOS and Android
Behavior-driven development with RSpec
Version control with Git and build automation via Bamboo
Deployment on AWS

Jan 2013 - Dec 2013

1 year

Application Support Engineer

Experian GmbH

ITIL management and process optimization
Incident management
Support of email marketing services platform (CCMP)
Introduction of new processes and enforcement of SLAs according to ITIL
Automation scripts for backup storage
Creation of IBM Crystal Clear Reports templates

Nov 2012 - Nov 2012

1 month

System Administrator

Ceteq GmbH

Provisioning of network infrastructure and installation of Opsi server
DHCP configuration for PXE client workstations
Integration of netboot products for Windows XP and Windows 7
Automated software distribution setup
Training of staff on Opsi server maintenance

Aug 2012 - Oct 2012

3 months

Test Specialist

E-Plus

Review of service specification documents and application test scenarios/test cases
Verification of document quality and completeness
Provision of improvement recommendations

Jul 2012 - Jul 2012

1 month

Software Developer; Software Tester; System Engineer

Software-Datenlieferant (TecDoc)

Evaluation of interfaces and setup of test environment for Adobe BlazeDS AMF
Development and integration of Groovy scripts in SoapUI for service testing and session handling
Parameterization of scripts
Integration with and evaluation of LoadUI for virtual user load testing

Jul 2010 - Aug 2010

2 months

Student Assistant

RIF e.v.

Hardware refurbishment and network setup
Windows reconfiguration
Server and network infrastructure installation
Maintenance of projectors

Mar 2010 - Dec 2011

1 year 10 months

Software Developer; System Engineer; System Administrator

TU Dortmund

Java development of web portal and backend for cloud user management
Setup and debugging of OpenNebula environments
Code refactoring and bug fixing
Design and implementation of IaaS environment based on OCCI and CDMI interfaces
Architecture evaluation and test environment setup for OpenNebula
Administration of hardware and software for high-performance IT infrastructure including DHCP, LDAP, KVM virtualization
Maintenance of virtual infrastructure and documentation

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 Insurance (4 years), Information Technology (3.5 years), Metals and Mining (2.5 years), Healthcare (2 years), Education (2 years), and Banking and Finance (1 year).

Insurance

Information Technology

Metals and Mining

Healthcare

Education

Banking and Finance

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 (12.5 years), Product Development (7.5 years), Operations (5.5 years), and Quality Assurance (0.5 years).

Information Technology

Product Development

Operations

Quality Assurance

Skills

Focus Areas

Software Architecture
Software Development
System Architecture
Network Architecture
Virtualization (Kvm, Xen, Esc)
Cloud Computing (Opennebula, Vmware Vsphere, Occi, Cdmi)
Storage (Nas, San)
Administration (Ldap, Dhcp)
Relational Databases, Nosql Databases
Web Development
Mobile App Development

Methodical Know-how

Uml
Structured Analysis
Dynamic/static Testing
Specification Techniques: Black-box Testing, White-box Testing
Interface Testing
Presentations
Itil
Process Models, Project Management (V-model, Extreme Programming, Scrum, Kanban)
Continuous Integration
Continuous Delivery

Technical Know-how

Microsoft Windows 10, 11
Linux (Sles, Ubuntu, Centos)
Macos
Office Applications: Ms Word, Excel, Powerpoint, Visio, Project
Databases: Mysql, Ms Sql, Mariadb, Mongodb, Redis, Elasticsearch
Programming Languages: Java, Javascript, Typescript, Groovy, Bash
Version Control: Git, Subversion
Software Firewall (Iptables)
Ides: Intellij, Webstorm
Web Servers: Apache Tomcat, Nginx
Ticketing System (Jira)
Deployment Tools: Bamboo, Jenkins, Gitlab
Web Services: Soap, Rest, Json, Xml
Load And Performance Testing Tools: Soapui, Loadui
Microservices (Docker Containers, Kubernetes)
Vlan, Vpn, Vnc
Html5 And Css, Bootstrap, Angular
Aws, Openshift, Kubernetes

Languages

German

Advanced

English

Advanced

Polish

Advanced

Education

Diploma in Computer Science, minor in Business Administration · Computer Science

Certifications & licenses

Istqb Certified Tester Foundation Level

Professional Scrum Master 1

Profile

Created

October 2023

Last Update

January 2026

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Frequently asked questions

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

Where is Arkadius based?

Arkadius is based in Dortmund, Germany.

What languages does Arkadius speak?

Arkadius speaks the following languages: German (Advanced), English (Advanced), Polish (Advanced).

How many years of experience does Arkadius have?

Arkadius has at least 13 years of experience. During this time, Arkadius has worked in at least 12 different roles and for 12 different companies. The average length of individual experience is 1 year and 1 month. Note that Arkadius may not have shared all experience and actually has more experience.

What roles would Arkadius be best suited for?

Based on recent experience, Arkadius would be well-suited for roles such as: Architect; Senior Developer; Full Stack Developer; DevOps Lead, Senior Full Stack Developer; Product Owner, Senior Developer.

What is Arkadius's latest experience?

Arkadius's most recent position is Architect; Senior Developer; Full Stack Developer; DevOps Lead at Bitmarck Holding GmbH.

What companies has Arkadius worked for in recent years?

In recent years, Arkadius has worked for Bitmarck Holding GmbH and Signal Iduna Gruppe.

Which industries is Arkadius most experienced in?

Arkadius is most experienced in industries like Insurance, Information Technology (IT), and Metals and Mining. Arkadius also has some experience in Healthcare, Education, and Banking and Finance.

Which business areas is Arkadius most experienced in?

Arkadius is most experienced in business areas like Information Technology (IT), Product Development, and Operations. Arkadius also has some experience in Quality Assurance (QA).

Which industries has Arkadius worked in recently?

Arkadius has recently worked in industries like Insurance and Healthcare.

Which business areas has Arkadius worked in recently?

Arkadius has recently worked in business areas like Information Technology (IT), Product Development, and Operations.

What is Arkadius's education?

Arkadius attended education in Computer Science.

Does Arkadius have any certificates?

Arkadius has 2 certificates. These include: Istqb Certified Tester Foundation Level and Professional Scrum Master 1.

What is the availability of Arkadius?

Arkadius is immediately available full-time for suitable projects.

What is the rate of Arkadius?

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