Tomas Helgi Johannsson
Database Administrator / Software Engineer
  • Garðabæ,
  • Iceland
Member Since: 1999/04/06
Industry: Finance
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CERTIFIED EXPERT

Over 20 years of experience as an Application Architect/Developer, a Database Administrator, and a PM focusing on performance.

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Professional Background
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Education
University of Iceland
Bachelor of Science
Computer Science
1995 – 1998
Peer Counsellor for the C.S. in 1996-1998
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Full Biography

I have over 20 years of experience as an Application Architect/Developer, a Database Administrator, and a Project Manager in a wide variety of business applications with a primary focus on performance.

During the past 15 years, my main focus has been on becoming a performance expert. In doing so, I have accumulated extensive experience and knowledge in programming in Java, Delphi, and C++, as well as gaining a deep and extensive expert knowledge in database design on DB2 (both on LUW and z/OS ) , Oracle and  MySQL/MariaDB databases. Not to mention expertise in SQL language with a main focus on queries in medium to larger, database, and data-warehouse environments.

Additionally, throughout the past decade, I have done independent research on best application and database design practices to enhance optimal performance.  I thoroughly enjoy researching various aspects of Database performance and technologies in my free time and often share my findings with coworkers and colleagues around the world.  
Through my research, I have obtained a broad understanding of development best practices and gained extensive experience in UML/RUP and other technical development/project management standards such as Prince2, Kanban, and Agile.

My main interest lies in client/server programming and distributed relational database design using DB2, Oracle, or  MySQL/MariaDB.

Overall, I am an extremely self-motivated individual and have demonstrated an exceptional aptitude for new/current/legacy technologies and problem-solving skills in every project in which I have taken part.

I have experience in the following programming languages
C/C++
Delphi
Java
SQL and PL/SQL
Visual Basic
Perl / PHP
and
Ada

and following Groupware-applications
Lotus Notes
Outlook

Experience and worked with the following databases
Oracle
MySQL
MariaDB
MS SQL
BTrieve
Pervasive SQL
PostgresSQL
DB2 UDB v. 8.2.x, 9.x, 10.1, 10.5, 11.1 , 11.5 on LUW
DB2 for z/OS v. 7.1, 8.1, 9.1, 10, 11, 12

Platforms that I have experience in
Unix
Linux
Windows
Macintosh (MacOS)
RiscOS
z/OS

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Level Progress

Current: Level 30
Tomas Helgi needs 45,764 points to level up.
LVL 31
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    30
  • MySQL Server
    19
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    13
  • Java
    13
  • Query Syntax
    12
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    11
  • SQL
    10
  • Java EE
    9
  • Linux
    8
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    7
  • PHP
    7
  • JSP
    6
  • Microsoft SQL Server
    6
  • Delphi
    6
  • Windows OS
    5
  • PostgreSQL
    3
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    3
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    3
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    3
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    3
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    3
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    3
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    3
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    3
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    3
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    3
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    3
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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    2
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