Andrzej Szeląg
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Andrzej Szeląg Email & Phone Number

🔴 Designing, implementing, and modernising business applications to support companies and organisations 🔴 Java Developer at Grupa Helion SA
Location: Konin, Wielkopolskie, Poland 6 work roles 3 schools
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Current company
Grupa Helion SA
Role
🔴 Designing, implementing, and modernising business applications to support companies and organisations 🔴 Java Developer
Location
Konin, Wielkopolskie, Poland
Company size
107 employees

Who is Andrzej Szeląg? Overview

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Andrzej Szeląg is listed as 🔴 Designing, implementing, and modernising business applications to support companies and organisations 🔴 Java Developer at Grupa Helion SA, a with 107 employees, based in Konin, Wielkopolskie, Poland. AeroLeads shows a matched LinkedIn profile for Andrzej Szeląg.

Andrzej Szeląg previously worked as Java Developer at Umowa Zlecenie/Freelancing and Technical Writer at Grupa Helion Sa. Andrzej Szeląg holds Postgraduate Degree, Computer Programming from Lodz University Of Technology.

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Grupa Helion SA

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Profile bio

About Andrzej Szeląg

IT has been my passion for 10+ years. Completing my studies and professional courses, I learned about:🔹computer networks/networking,🔹Microsoft Server Operating Systems (I am a Microsoft Certified Systems Administrator:Security and Microsoft Certified System Engineer:Security),🔹three programming languages: Java, Python and JavaScript.I also am the author of seven IT books for the HELION Publishing House (computer networks, database design and programming, public key infrastructure, failover clustering).For 4+ years I have been developing web-based applications with using Java, Python and JavaScript. Currently, I am a Java Developer which passionate about Java, Spring Framework Ecosystem, Clean Code and SOLID design principles. I have completed:🔹Program Java Developer (SoftwareSkill),🔹Cloud Computing (Lodz University of Technology & HackerU)🔹Spring Boot (SoftwareSkill),🔹Modern Business Applications Java/Jakarta EE (Lodz University of Technology),🔹CS50's Web Programming with Python and JavaScript (Harvard University).Stack I work with:🔹Java/Spring Boot🔹Hibernate🔹Oracle Database and more.IT, learning and development are very important for me. ❤️ 🔴 Contact with me:Phone: +48 608 461 178Email: szelagandrzej@gmail.com

Listed skills include Php, Web Development, Software Development, Network Administration, and 1 others.

Current workplace

Andrzej Szeląg's current company

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Grupa Helion SA
Grupa Helion Sa
🔴 Designing, implementing, and modernising business applications to support companies and organisations 🔴 Java Developer
poland
Website
helion.pl
Employees
107
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6 roles

Andrzej Szeląg work experience

A career timeline built from the work history available for this profile.

Java Developer

Current
Umowa Zlecenie/Freelancing

Poland

✔ developing web-based applications and website design✔ creating FMS - IT System for Managing Control System Faults on Mining Railways 🟦 Tech Stack: 🔹JEE8🔹JPA/EclipseLink🔹JSF/PimeFaces🔹Maven🔹Lombok🔹Payara Server🔹Oracle Database✔ creating GYM - IT application to collect information about the members of a gym 🟦 Tech Stack:🔹Java 17 / Spring / Spring Boot🔹JPA/Hibernate ORM🔹Maven🔹Lombok🔹PastgreSQL🔹JUnit / Mockito / AssertJ

Mar 2020 - Present

Technical Writer

Current
Grupa Helion Sa

Poland

✔I wrote seven IT books for the HELION Publisher about as an advanced technology, like Public Key Infrastructure (PKI) and Failover Clustering (FC)✔Also I wrote books about comupter networks, managing Microsoft SQL Server and Microsoft Windows 7, 8 and 10

Sep 2005 - Present

Supervisor

Current
Pak Górnictwo

Poland

✔I manage employee electrical safety at workplace in an Electrical Division✔I managed SYNDIS RV system who cooperated with Windows Server and Oracle Database

Sep 2017 - Present

Supervisor

Eko-Surowce

Poland

✔I managed employee electrical safety at workplace in an Electrical Division✔I managed SYNDIS RV network managament system (NMS) who cooperated with Windows Server and Oracle Database

Sep 2014 - Aug 2017

Supervisor

Kwb Konin

Poland

✔I managed employee electrical safety at workplace in an Electrical Division✔I managed SYNDIS RV system who cooperated with Windows Server and Oracle Database🔴 In this period I wrote web business application who helped me to solve a seriously problem with freight wagons in the department when I worked (PHP+Apache HTTP Server+MySQL).

Aug 1992 - Aug 2014

Developer

Webproject

Poland

✔developing web-based applications ✔website design

Sep 2005 - Dec 2006
Team & coworkers

Colleagues at Grupa Helion SA

Other employees you can reach at helion.pl. View company contacts for 107 employees →

PS Peter Szostka Peter Szostka Colleague at Grupa Helion SaSuwalski, Podlaskie, Poland View → KN Kamil Nisiewicz Kamil Nisiewicz Colleague at Grupa Helion SaZabrze, Śląskie, Poland View → NK Natalia Kostka Natalia Kostka Colleague at Grupa Helion SaRuda Śląska, Śląskie, Poland View → MR Miłka Raulin Miłka Raulin Colleague at Grupa Helion SaPoland View → JS Jaro Skalski Jaro Skalski Colleague at Grupa Helion SaGliwice, Śląskie, Poland View → SJ Sarah Jones Sarah Jones Colleague at Grupa Helion SaLondon, England, United Kingdom View → KM Karolina Moc Karolina Moc Colleague at Grupa Helion SaGliwice, Śląskie, Poland View → MB Marcin Borecki Marcin Borecki Colleague at Grupa Helion SaKatowice Metropolitan Area, Poland View → DM Danuta Mendrala Danuta Mendrala Colleague at Grupa Helion SaKatowice, Śląskie, Poland View → DJ Dominika Jachimowska Dominika Jachimowska Colleague at Grupa Helion SaKnurów, Śląskie, Poland View →
3 education records

Andrzej Szeląg education

Postgraduate Degree, Computer Programming

Lodz University Of Technology

🔴 On this postgraduade degree I wrote an IT System for Managing Control System Faults on the Mining Railways (FMS) by using: Tech Stack.

FAQ

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What company does Andrzej Szeląg work for?

Andrzej Szeląg works for Grupa Helion SA.

What is Andrzej Szeląg's role at Grupa Helion SA?

Andrzej Szeląg is listed as 🔴 Designing, implementing, and modernising business applications to support companies and organisations 🔴 Java Developer at Grupa Helion SA.

Where is Andrzej Szeląg based?

Andrzej Szeląg is based in Konin, Wielkopolskie, Poland while working with Grupa Helion SA.

What companies has Andrzej Szeląg worked for?

Andrzej Szeląg has worked for Umowa Zlecenie/Freelancing, Grupa Helion Sa, Pak Górnictwo, Eko-Surowce, and Kwb Konin.

Who are Andrzej Szeląg's colleagues at Grupa Helion SA?

Andrzej Szeląg's colleagues at Grupa Helion SA include Peter Szostka, Kamil Nisiewicz, Natalia Kostka, Miłka Raulin, and Jaro Skalski.

How can I contact Andrzej Szeląg?

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What schools did Andrzej Szeląg attend?

Andrzej Szeląg holds Postgraduate Degree, Computer Programming from Lodz University Of Technology.

What skills is Andrzej Szeląg known for?

Andrzej Szeląg is listed with skills including Php, Web Development, Software Development, Network Administration, and Databases.

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