Grzegorz D.-Service Owner
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Experience
Service Owner
Telefonica
- Responsible for the development and maintenance of OpenGateway (a framework of common network APIs designed to provide developers with access to operator networks) for Telefonica Germany/O2
- Led the entire development process, from the foundation phase through stabilization
- Ensured that delivered solutions complied with internal policies
- Facilitated requirements workshops, analysis, and the delivery phase
- Identified potential improvements in performance, functionality, security, and generated revenue. Applied AI/ML where feasible
Senior Business IT Analyst
Capgemini
- Member of a large team (ca. 70 professionals) delivering a complex enterprise application for the automotive industry (communication with the customer and documentation in German)
- Worked closely with the customer, developers, architects, and testers throughout the Software Development Life Cycle
- Facilitated Agile ceremonies, including demos
- Reviewed deliverables from other analysts
- Organized and led knowledge transfer to other team members and vendors
Business and system analyst
T-Mobile
- Analytical assignments in various projects (5-200 people), including international teams (PL/CZ/SK)
- Responsible for identifying and dividing analytical tasks (preparing WBS)
- Conducted workshops with users to collect, analyze, and prioritize requirements
- Developed High Level Design documentation: processes, data structures, and GUI sketches using ARIS or Enterprise Architect. Designed Web Service interfaces
- Designed/reviewed test scenarios
- Designed automated interface tests with SoapUI
- Provided subject matter oversight of the supplier's implementation of requirements
- Supported testing at all stages: system, integration, and acceptance
- Analyzed and evaluated suppliers' offers
- Oversaw the correct use of BPMN in the project
Business Analyst
Kredyt Bank
- Coordinated the central system data archiving project
- Worked as an analyst on the "Family on its own" loan implementation project (requirements gathering, documentation preparation, and cooperation with the supplier)
Analyst & Developer
Bank Millennium
- Collected requirements, analyzed, and coordinated projects using ASP .NET technology (employee portal, IT Helpdesk, and knowledge management portal)
- Implemented the .NET – kdpw (Central Securities Depository of Poland) stream system
- Participated in software development process optimization and IT management projects
- Prepared technical documentation for projects
- Administered Jira, Confluence, and Bamboo applications
IT Specialist
Bank BPH
- Specialist on the transactional products implementation team
- Collection and analysis of user requirements
- Analysis of changes to transaction banking systems
- Project coordination and cooperation with system suppliers
- User training
- Responsible for migration to the new version of the system handling over 300 thousand transactions per day (TransCollect)
- Conducting the internal certification process for implemented software
- Database and software development
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Telecommunication, Banking and Finance, Automotive, and Information Technology.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Quality Assurance, Product Development, and Project Management.
Skills
- Bpmn, Uml – Enterprise Architect/Aris
- .Net/C#, Java
- Soap, Rest Apis
- Ms Sql Server, Oracle
- Soapui, Postman
- Jira, Confluence
- Observability: Dynatrace, Kibana
Languages
Education
Warsaw University of Technology
M.Eng. · Information Systems Engineering · Warsaw, Poland
Certifications & licenses
OMG Certified Expert In Business Process Management (OCEB-F100)
OMG Certified UML Professional (OCUP-100)
PMI Certified Associate In Project Management (PMI-CAPM)
Statistics
Experience
Expertise
Qualifications
Frequently asked questions
Have questions? Find more information here.
Grzegorz is based in Warsaw, Poland and can operate in on-site, hybrid, and remote work models.
Grzegorz speaks the following languages: Polish (Native), German (Advanced), English (Advanced).
Grzegorz has at least 21 years of experience. During this time, Grzegorz has worked in at least 6 different roles and for 6 different companies. The average length of individual experience is 3 years and 5 months. Note that Grzegorz may not have shared all experience and actually has more experience.
Based on recent experience, Grzegorz would be well-suited for roles such as: Service Owner, Senior Business IT Analyst, Business and system analyst.
Grzegorz's most recent position is Service Owner at Telefonica.
In recent years, Grzegorz has worked for Telefonica, Capgemini, and T-Mobile.
Grzegorz is most experienced in industries like Telecommunication, Banking and Finance, and Automotive. Grzegorz also has some experience in Information Technology.
Grzegorz is most experienced in business areas like Information Technology, Quality Assurance, and Project Management. Grzegorz also has some experience in Product Development.
Grzegorz has recently worked in industries like Telecommunication, Automotive, and Information Technology.
Grzegorz has recently worked in business areas like Information Technology, Quality Assurance, and Product Development.
Grzegorz holds a Master in Information Systems Engineering from Warsaw University of Technology.
Grzegorz has 3 certificates. These include: OMG Certified Expert In Business Process Management (OCEB-F100), OMG Certified UML Professional (OCUP-100), and PMI Certified Associate In Project Management (PMI-CAPM).
Grzegorz will be available full-time from January 2027.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 6 Nov 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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