I have been working with Jano for five years, during which time he has contributed 500 man-days of work to my projects. I am not at all happy to be writing this review. It likely means I will have to find a suitable replacement for Jano. It is hard to find a reliable, responsible, and experienced database specialist—especially one with a sense of humor.

Projects where Jano was responsible for resolving operational incidents:

• Slovak electric utility company - support for the Central Information System
• Czech electric utility company – IS support
• Slovak Toll System – IS support

Over those five years, Jano completed every task assigned to him within the required timeframe and to the expected standard of quality. There is nothing more to add. Perhaps just one thing: Jano has the ability to explain even complex problems in plain language, making them understandable even to listeners with less technical expertise.

Matej Guľváš
Project Manager

During 2019 and 2020, Ján Majláth worked under my supervision on the project to build the Czech toll system, specifically in the area of ​​developing the data warehouse (DWH) solution.

This project involved addressing several challenges and issues associated with the phased development of the core systems from which the data warehouse (DWH) was to read its source data.

Jano’s primary task was to handle the correct loading of data from source systems into the DWH staging layer, but he was also actively involved in preparing individual star schemas within the DWH presentation layer.

His contribution to the project was significant, partly due to the situation regarding the source systems. He was willing to patiently and repeatedly modify code—even on weekends—that had already been fine-tuned for extracting data into the DWH staging layer.

Drawing on his knowledge, experience, and study of the source systems, he was able to quickly identify critical points in the data processing workflow and propose suitable solutions. He worked independently and efficiently. His communication with database administrators, the operations team, and the DWH team was constructive and free of conflict.

Patience, determination, knowledge, and overtime work were the key traits that perfectly define Jan in this project, and I am grateful to have been his project manager!

Bratislava 9 November 2020
Ladislav Gergely

Ján Majláth has been the responsible development DBA and database developer of IPG between December 2011 and November 2015. He has been very supportive to the team and has been very important within the maturing process of a small local to a big global scaled OLTP system. Jan has always been delivering high wuality results in both daily standard but also special and more complex database development and analysis tasks. Jan has always been very realiable and supportive. In production incident situations he remained calm and solved any issue even within excessive overtime in the rare situations when needed. The quality of his code deliverables (PL/SQL, Windows batch) has been very high, Jan has great talent to structure and document code into a readable way for reuse by colleagues.

Bratislava 30.11.2015
Andreas Wieczorek

Ján Majláth worked at First Data under my supervision from April 2009 to May 2011. During this period, we performed background data processing, which involved processing data at the file and database record levels.

Files and database records were processed automatically, handled by software modules running on Unix (AIX version 6.1) and within an Oracle database (version 10g, later 11g). A proprietary system was developed for this automated processing; it is configurable, supports monitoring, and is easily extensible. Ján Majláth’s primary responsibilities included creating new modules for the system, modifying existing ones, and providing post-implementation support. He quickly mastered the system and utilized it effectively—tasks that required proficiency in Unix command-line programming (shell scripts) and the PL/SQL database language, as well as an understanding of how these two environments interact.

As previously mentioned, key technologies included Unix shell programming, PL/SQL, and the creation and optimization of SQL queries. He approached the work proactively, striving for the best and most efficient implementation while taking into account the design of existing solutions.

During Ján Majláth’s tenure, new report and export structures were introduced, requiring an XML format. Ján Majláth took a proactive approach to working with the new technology and contributed significantly to the successful implementation of these requirements.

His work also involved providing support and consultation to the department responsible for customer problem resolution. He maintained a proactive and friendly approach; colleagues turned to him quite frequently, and he was always ready to help.

His key positive qualities include reliability, thoroughness, a commitment to continuous learning, and a positive approach to teamwork.

Bratislava, 29 March 2012
Peter Kohutka

Ján Majláth worked for IBM on the Datawarehouse Release 2/3 project.

The Data Warehouse Release 2/3 project—one of the largest IT projects for the client and of its kind in Slovakia—was implemented for Slovak Telekom between May 2006 and September 2007. The project aimed to deliver business information to support decision-making in the form of static reports, OLAP cubes, dashboards, and data mining models across 14 of the client's business areas.

More than 50 employees from both the client and the supplier were involved in this comprehensive project. The project team was organized into micro-teams, with each micro-team responsible for implementing a portion of the data warehouse solution for specific business areas—such as Customer Behavior Prediction, Trouble Ticket Management, Revenue Assurance, and others. The micro-team Ján Majláth worked in was responsible for implementing the Revenue Assurance area, specifically the Traffic Analysis component.

Each micro-team was responsible for the solution's entire lifecycle: analysis of the specific domain and user requirements, impact analysis, solution design, report design, implementation of ETL processes and reports, testing, determining the integration method for the existing solution, documentation, support for UAT and deployment, and post-implementation support.

Ján Majláth worked as a Data Integration Analyst/Developer, responsible for the data component of the solution—covering requirements and impact analysis, design, implementation, and testing of ETL processes for specific business areas.

Given the complexity of the domain and the vast volume of data, managing the expectations and requirements of business users was a key success factor in the project. Thanks to the proactive approach of the entire micro-team—and Ján Majláth personally—this was successfully achieved, as evidenced by the high level of user satisfaction following the solution's deployment.

As the Project Delivery Manager, I worked closely with Ján Majláth and the micro-team of which he was a member. Through his responsible and meticulous approach to completing project tasks, Ján Majláth contributed significantly to the project's successful conclusion. He took a proactive approach to problem-solving, consistently aiming—in collaboration with the user and his colleagues—for the optimal solution in terms of quality, performance, and implementation time. He approached problem-solving in a constructive and pragmatic manner.

Ján Majláth also made a significant contribution to the broader team's collaboration, particularly by providing consultations to colleagues in his areas of expertise—most notably SQL and PL/SQL programming, data processing optimization and efficiency improvements, and Unix-platform (HP-UX) scripting languages.

For the reasons stated, I can recommend Ján Majláth as a high-quality employee for participation in other projects, including those of a large scale.

Best regards, Andrej Feik

Ján Majláth worked at Allianz - Slovenská poisťovňa from October 1, 2002, to April 30, 2006. Allianz - Slovenská poisťovňa is the largest provider of insurance products in Slovakia and is part of the international Allianz Group, one of the world's largest financial institutions.

Ján Majláth worked in the actuarial systems department (specifically the actuarial IT system development unit) under my supervision. His role involved extending the functionality of the existing production system and developing new modules—primarily using Oracle Developer, SQL, and PL/SQL—running on Oracle 8i and 9i databases within an HP-UX 11 operating environment. His responsibilities encompassed functions for processing life insurance data and investment processes, as well as the presentation layer (front-end) and the resolution of operational issues; the latter included, among other things, overseeing the weekly processing of investment-linked insurance policies.

Key attributes of Mr. Majláth include the diligence and sense of responsibility he brought to his assigned tasks. He approached these tasks proactively and always strove for the highest quality in his work. He consistently completed assignments on time and never left a task unaddressed. Whenever I assigned a task or problem to Mr. Majláth, I was confident it would be successfully resolved to the satisfaction of the person who assigned it. He also possesses strong teamwork skills, as he never refused to provide consultation or advice to his colleagues.

Regarding his professional expertise, I must highlight his excellent programming skills, as well as related competencies such as optimization, reducing the resource intensity of bulk data processing, and analytical thinking. I consider his interest in expanding his knowledge—beyond just his own field—to be highly important; for instance, he has shown interest in database administration and matters concerning business workflows.

Therefore, I can recommend Ján Majláth as a high-quality employee to any company or organization.

28.4.2006

Sincerely,
Ing. Pavol Chvála
Head of Actuarial IT Systems Development
Allianz - Slovenská poisťovňa, a.s.
Head Office
Bratislava

I am pleased to write this statement regarding the work of Ján Majláth, who has been employed at Allianz Slovenská poisťovňa since October 1, 2002, as a programmer for the information system for insurance. Allianz Slovenská poisťovňa is a subsidiary of the international Allianz Group, which ranks among the largest insurance companies and most significant corporations, not only in Europe.

I work in the Personal Insurance Department at the insurance company and am an internal client of the Insurance Systems Department (PTS)—part of the IT division—where Mr. Majláth also works. My department submits requests for changes and new features for the PTS department's production information system. I primarily communicate with Mr. Majláth regarding the Investment-Linked Life Insurance product; my requests are routed to him for resolution, and I am frequently in contact with him by phone or in person.

During the time I worked with Mr. Majláth, I was very satisfied with both his approach and his professional expertise. He frequently provided valuable consultations regarding the information system—addressing new requirements as well as resolving non-standard situations. He always took a proactive approach to his work, often proposing the best possible solution for a given request or problem. He consistently strove for the highest quality in his work, handling tasks responsibly and thoroughly. He was a true team player, always doing his utmost to assist colleagues in resolving issues and completing assigned tasks.

I can certainly recommend Ján Majláth to any company looking for quality employees, as working and communicating with him is excellent.

19.1.2006

Jaroslava Gustafíková
Personal Insurance Department
Allianz Slovenská poisťovňa a.s.

Employee Evaluation

Name: Ján Majláth
Division/Section: DV / Section Banská Bystrica
Position: Programmer
Date: 26 September 2002
Evaluated by: Daniel Suchý, head of department; Jozef Roštár, head of section

Main duties

• DWH project for Slovak insurance company
• Administration of Oracle databases
• Maintenance of data model with Oracle Designer technology
• DWH project for Tax office
• Design and implementation of ETL (Informatica PowerMart)
• Use webDataBlade for DWH

Main qualities

• In carrying out tasks, he proceeds actively and achieves good results.
• He has a good level of professional knowledge and is able to apply it in practice.
• Team attributes corresponding to the job position.
• He is willing to improve his knowledge and skills.
• The employee's personal contribution lies primarily in the ability to carry out assigned tasks on time and to the required quality.

This evaluation is issued at the employee's request upon the termination of employment.

Daniel Suchoň a Jozef Roštár
Date: 26 September 2002

To Whom It May Concern

I am delighted that I have the opportunity to write this letter, which confirms that Jan Majláth has worked at Slovak Telecom from 1 May 2000 to 31 July 2000. Slovak Telecom is the biggest telecommunication company in the Slovak Republic.

Mr. Majláth worked at my department of Datawarehouse Maintenace and Development as a programmer. His position included development of new modules for our Datawarehouse system and the maintenance development in C/C++ at the platform HP-UNIX 10.20 and Windows for the database Oracle and Oracle Express. He did a lot of work of the highest quality which included solving runtime problems, creation of programs for database users monitoring, data-processing and archiving which were completed on time and in the highest quality.

As far as I know Mr. Majláth is a hard-working man with a sense of responsibility and high rate of performance. Mr. Majláth worked very well as a member of a team; proof of this can be that our employees have still contacts with him and he has never refused to provide advice on any problem.

Therefore, I can strongly recommend without any reservation Mr. Majlath as an excellent software developer for any company or institution.

Sincerely,

Mgr. Milos Hedera
Head of Data Manipulation Department
Development Center Banská Bystrica
Slovak Telecom
July 31, 2001

Supervisor's Assessment of Ján Majláth's Master's Thesis: "The Use of Kohonen Neural Networks in Robotics"

Robot coordinate transformation is an important and frequently addressed task in robotics. It is typically approached from the perspective of the kinematic analysis of mechanisms, employing trigonometric methods. Recently, MLP (multilayer perceptron) neural networks have also begun to be used in research to solve this problem; they emulate exact analytical solutions by learning complex non-linear mappings between Cartesian and joint coordinates. To the best of my knowledge, the approach utilizing Kohonen SOM (Self-Organizing Map) neural networks is novel and is based on principles that are more likely to be applied in higher vertebrates than those underlying MLP-type networks.

To address the problem, the student needed to develop a simulation environment, as this type of network is not adequately supported by any existing simulation package suitable for neural network modeling. This required mastering the complex subject of Kohonen self-organizing maps to a high level of proficiency. He successfully accomplished both tasks to an excellent standard.

The transformation problem was initially addressed using a standard SOM network. However, experiments revealed that the standard SOM was unsuitable due to ambiguities arising from the so-called "flipping" of the network. Consequently, it became necessary to implement and integrate an "extended SOM" into the simulation environment. This model was further enhanced with a reinforcement learning algorithm, which increases the degree of learning autonomy.

The author conducted a wide range of diverse simulation experiments using the SOM network, confirming the validity of this approach to the problem. At the same time, this work provided insights into the limitations of the approach. I consider the key contributions to be the use of three-dimensional SOM networks—which appear only rarely in the literature—as well as the application of reinforcement learning algorithms and a systematic, thorough approach to the simulation experiments. A random Gaussian vector generator was also developed as a by-product of this work; the simulation environment created for the project is already being used in teaching the "Artificial Intelligence Applications" course.

The author’s idea of ​​using a SOM network for color image compression is entirely original. This demonstrates the author's deep understanding of the subject matter. Although this novel method is not yet comparable in terms of efficiency to techniques commonly used in computing, it represents a highly interesting result that testifies to the author's creative engagement.

J. Majláth worked with a high degree of independence. He required no consultations regarding the actual programming, needing only guidance on the direction of problem-solving.

Conclusion: I rate J. Majláth’s diploma thesis as "excellent" and recommend it for an award from the Dean of the Faculty of Natural Sciences.

In Banská Bystrica, June 1, 1999, Ing. Jozef Suchý, CSc.