Grzegorz Jakub Abramczyk


I am IT enthusiast and I'm looking for opportunities to apply my passion to a maximum effect.I work with well others, sometimes leading, sometimes following, teaching and learning at the same time.I look for challenges, chances to overcome difficult problems and to make impact. I adapt quickly and pride myself on the ability to get work done.

My primary area of expertise is Java and JEE, but I am also proficient web technologies and solution design, familiar with database development, requirement gathering and testing. I have some experience in leading technical teams and I am looking for a chance to enhance my leadership skills. I am mastering JavaScript development and learning Cloud technologies. I worked on many projects building custom solutions for various clients and collaborated with international and distributed teams.


IT Architect

2017-10 Tuatara
I'm designing and implementing solutions for Tuatara clients.

Senior Software Engineer

2017-05 2017-10 F5 Networks
Java developer, docker expert, DevOps implementer from the Dev side.

IT Specialist

2009-07 2017-04 IBM Polska Sp. z o.o.
I'm working in IBM GBS building custom solutions for clients. Leading development teams, setting technical direction, planing and managing work, designing and developing solutions.

Junior Developer (Paid Intern)

2007-09 2009-06 IBM Polska Sp. z o.o.
I joined IBM GBS during studies and worked as a developer in teams building custom solutions for multiple clients.


Alior - API Connect Support

2018-05 Alior Bank

Support and small scale development after delivery of API Connect implementation

I provide advice and support to the client's team developing the API.


2019-03 Internal

Implementation of reusable solution for consuming PSD2 interfaces.

I designed and developed Fintin prototype. I'm working on design and leading the implementation of initial release of the product.


2018-11 2019-03 Omantel

Implementation of new mobile application and support of existing solutions.

I implemented requested enhancements and fixed pending issues in e-commerce store. I configured Varinsh Cache for integration services. I defined source control flows, implemented static code analysis and code review process. I defined and updated automated builds for several components.

Raiffeisen - API Connect

2018-05 2018-11 Raiffeisen Bank

Implementation of IBM API Connect product and creation of PSD2 related APIs. The project was cancelled due to the client being acquired.

I was helping the client to implement IBM API Connect in support of PSD2 directive. I was working on functional architecture and establishing API delivery processes and tools. I implemented automated build and tests along with several mock applications and APIs.

Alior - API Connect

2017-10 2018-04 Alior Bank

Implementation of IBM API Connect product and creation of PSD2 related API.

I documented and helped to define solution architecture. I designed and implemented approach to API security. I defined standards and lead implementation of PSD2 APIs. I devised and implemented framework to test API Connect APIs. I prepared development documentation and delivered training to the client's team.


2017-09 2017-10  

Building next generation cloud-native ADC.

I educated my team about container technologies, set up demonstration OpenShift cluster and helped to set up DevOps delivery pipeline.

TMOS Independence

2017-05 2017-08  

Refactoring of internals of REST platform and modernization of delivery pipeline.

I replaced home-brew socket layer with Apache HttpClient and improved build system to use Artifactory and Ivy to mange third party dependencies.


2016-07 2017-04 Public Employment Service Austria (AMS)

Migration legacy document management system to IBM FileNet

I implemented part of the document migration process.

ibank v2

2016-04 2016-06 USB BANK PLC.

Rewrite of the Internet banking application to make use of modern technologies.

I implemented several functional areas across all application layers.


2015-12 2016-04 Metlife

Implementation of the integration bus connecting single front-end system to back-ends across central Europe.

I implemented front-end adapter and country-routing logic. I set up CI server for the development team and prepared automatic integration tests.


2013-01 2015-09 Centrum Systemów Informacyjnych Ochrony Zdrowia

Implementation of Document Verification System as a part of establishing nation wide medical document processing and automation system

I designed internal logic of Document Verification System. I organized and lead development team through successful delivery of several phases of project. I managed communication with our client on technical level and represented our system in integration discussion.

Green eMotion

2012-05 2015-03 European Commission

Implementation of service marketplace prototype allowing project partners across Europe to integrate their IT systems around electro-mobility. Implementation of additional prototype applications in the area of  the electro-mobility.

I contributed to the marketplace design by preparing detailed gap analysis between requirements and WebSphere Commerce package. I remodeled WebSphere Commerce commerce storefront to match Green eMotion theme. I implemented required changes in registration, checkout and account management flows. I implemented service gateway based on IBM BPM. I supported release of the marketplace prototype and eventually took over cloud infrastructure management. I designed and developed significant portion of Driver Portal prototype application and lead development of Network Operator Portal prototype application. I worked in distributed team with coworkers across the globe.


2013-07 2014-04 Ministry of Finance

Development of central meta-data management system for tax administration

I designed application part of the solution and helped to design database part. I formed and lead development team, provided guaidance, technical direction and solved technical problems with performance.

eSHOP Logowanie

2012-10 2013-01 Polkomtel S.A

Elimination of login requirement in checkout flow in WebSphere Commerce based store.

I developed, tested and packaged required changes. I supported functional tests and production deployment. I diagnosed performance problem.


2011-09 2012-03 MSWiA

Development of the core parts of central registry system for polish government

I implemented several major features, for the core registries and identity synchronization. I performed wide refactoring of code base, prepared automatic functional and performance tests and documented significant part of the system.


2011-09 2011-12 PZU S.A

Implementation of FileNet for an insurance company

I integrated Oracle BI Publisher into the solution and to prepared templates for document printing.

eSHOP 2 maintenance

2010-11 2011-08 Polkomtel S.A

WebSphere Commerce Entrprise V6 based store maintenance

I investigated and fixed production issues. I performed migration of source code from CSV to RTC.

Zgoda A534

2011-03 2011-08 ITI

Implementation of enterprise wide customer consents gathering in WebSphere Commerce based store.

I gathered requirements, prepared and confirmed design with client and lead implementation of required changes.

eSHOP 2 R1

2011-01 2011-07 Polkomtel S.A

Improvement of WebSphere Commerce Enterprise V6 based store for major mobile operator

I implemented several significant features from design, throughout coding to testing and supporting release.


2010-09 2010-11 MSWiA

Implementation of system of government registers.

I performed major refactoring of code-base, maintained sat of business rules in ILOG JRules and prepared some utility model to model transformations in Rational Software Architect.

Blue Vanilla

2010-07 2010-08 ITI

Implementation of new version Siebel CRM and Websphere ESB for digital television operator.

I tested the database migration and written scripts to automate this task.

ESHOP phase 2

2009-04 2010-07 Polkomtel S.A

Improvement of WebSphere Commerce Enterprise V6 based store for major mobile operator

I prepared draft of some Use Cases, participated in requirement meetings and updated design documentation. I implemented checkout flow, order status engine and administrative console enhancements. I supported tests and release of solution. 


2009-12 2010-01 MSWiA

Modernization of Polish citizens database

I implemented BIRT reporting engine for document generation.


2009-04 2009-10 Postal Service

Troubleshooting and support of sorting facility simulator.

I was tasked with helping the Siman V expert with code analysis and fixing bugs.

BRE Valuta Direct

2008-07 2009-07 BRE Bank

Implementation of currency trading solution based on Valuta-Direct® and integration with existing infrastructure.

I implemented of two data migration and synchronization modules from design, through development, to testing and documenting them.

ESHOP maintenance

2008-07 2008-12 Polkomtel S.A

WebSphere Commerce Enterprise V6 based store maintenance

I investigated and fixed production issues.


2007-09 2008-06 Polkomtel S.A

Implementation of WebSphere Commerce Enterprise V6 for major mobile operator.

I did front-end development, both for client facing and administrative pages. I did functional and automatic performance tests.


  • MSc, Computer Science Faculty of Mathematics and Information Science, Warsaw University of Technology


2009-09 Architectural Thinking SIMT2G
2009-09 Foundation Consulting Programme GBS2427
2010-12 IBM WebSphere Application Server V7 Administration on Windows WA370G
2011-10 Project Management Fundamentals PM10G
2014-07 IBM Unified Method Framework for TI Professionals Workshop TIWSBX
2016-11 Technical Leader in You TLYG0001


2011-07 IBM Certified System Administrator - WebSphere Application Server Network Deployment V7.0 IBM Professional Certification Program
2012-09 Oracle Certified Associate, Java SE 7 Programmer Oracle Certification Program
2012-12 Oracle Certified Professional Java SE 7 Programmer Oracle Certification Program
2013-10 Actualizing IT Solutions Capability - Experience Level/L1 IT Specialist Professions
2016-01 Oracle Certified Professional, Java SE 8 Programmer Oracle Certification Program
2016-03 Actualizing IT Solutions Capability - Expert Level (Level 2 Certification) IT Specialist Professions
2016-04 IBM Certified Developer - WebSphere Application Server Developer Tools V8.5 with Liberty Profile IBM Professional Certification Program
2016-06 IBM Certified System Administrator - WebSphere Application Server Network Deployment V8.5.5 and Liberty Profile IBM Professional Certification Program
2016-08 IBM Certified Application Developer - Cloud Platform V1 IBM Professional Certification Program
2016-10 IBM Certified Solution Advisor - Cloud Reference Architecture V5 IBM Professional Certification Program
2017-02 IBM Certified Solutions Specialist - Rational Team Concert V6 IBM Professional Certification Program
2017-04 IBM Certified Solution Advisor - DevOps V1 IBM Professional Certification Program
2017-04 IBM Certified Advanced Application Developer - Cloud Platform V1 IBM Professional Certification Program
2018-03 IBM Certified Solution Implementer - API Connect V5.0.5 IBM Professional Certification Program
2019-03 IBM Certified Solution Implementer - DataPower Gateway v7 IBM Professional Certification Program


English Fluent
Polish Native