Zoltán Szilágyi

I'm a full stack web developer and data scientist

Who Am I

Zoltán Szilágyi

I am a full stack web developer and data scientist based in Munich with over 15 years experience in web development and data science.

I have and had the honor to work on multiple very interesting and really high-tech projects involving finance mathematics, simulations, data science and a lot of research for challenges that have not yet been solved.

I love my job and what I do every day: to use high tech to really solve problems that make our life much better than before.

My second job that I am really passionate about, is to develop my research projects: Investonom.com and QuantumAnalytica.org. On these projects I use the newest technologies to solve finance, liquidity problems and simulations. It is actually pure mathematics and technology that aggregate real banking data transactions using the European Union PSD2 directive. My algorithms sum up the creditor and debtor data for every year and month, automatically categorize and recognize patterns that are recurrent or eventually data anomalies. Over the real banking data, my tool simulates also real credit calculations, so that if somebody would like to see what happens if he/she alters the current status quo, than what happens in the short and long term. For me, who loves the numbers, I find it really amazing, that I could made is so far.

To make possible my research projects I needed very solid, reliable and scalable linux servers with very good physical and data protection hosted in Switzerland. In the last years I have multiple times reimplemented and adopted the latest tools, that can really serve millions of customers in the same time and still be able to monitor traffic and security using highly scalable databases and big data queries.

Technical Competencies

Programming languages

Java, Python, C, C++, Linux Shell Script, JavaScript, (Markup: CSS, HTML).

Frameworks, APIs and Tools:

Java World: Java EE, Java SE, Java FX, EJB, JPA, Hibernate;

Web Services / Microservices: JAX-RS (REST), JAX-WS (SOAP);


Docker: Dockerfile, Compose, Registry;

AWS, DF.eu, Digital Ocean Droplets; UX, Typography, Responsive Web Design, HTML5, CSS3, LESS, SASS;

Javascript: JQuery, Node.js, Angular.js; Bootstrap;

Build Systeme: NPM, Gulp, Grunt, Webpack;

Databases, Servers:

Oracle (10-12c, XE), PL/SQL, MSSQL, MySQL, H2 etc;

Wildfly, Jboss, Websphere Liberty, Weblogic, TomEE.

Continuos Integration and Deployment:

Git / GitLab / Github, Sonar, Jenkins / Jenkins pipelines, Docker;

Java build tools: Ant, Maven; Editoren: Eclipse, Sublime Text mit Emmet Plugin etc.

Continuos Integration and Deployment:

Git / GitLab / Github, Sonar, Jenkins / Jenkins pipelines, Docker;

Java build tools: Ant, Maven; Editoren: Eclipse, Sublime Text mit Emmet Plugin etc.

Reverse Proxy, SSL Certificates, Cryptography:

Nginx configuration with (Wildcard) SSL Cerfificates, Load Balancing

Data Science, Analytics:

ELK Stack: Log Stash, Elastic Search, Kibana; Apache Spark; Python;


LaTEX, AsciiDoc / AsciiDoctor and Plugins (z.B. for UML Diagrams)

My own brands and products

Investonom(www.investonom.com): InvestonomWeb and InvestonomFX.

My Portfolio Of Solutions


Investonom is the perfect tool that helps you to review and plan your finances. With some very easy and straightforward steps you can analyze and optimize your financial situation and plans for future.

Try out now!


InvestonomFX is the desktop implementation of the Investonom solution. It is available for Mac, Windows and Linux operating systems.

Available soon.


QuantumAnalytica.org is my data science research project web site. I use this site to publish my latest tools and results in this field.

Try out now!

QuantumAnalytica - Finance Mathematics

Implementing new ideas using fast prototypes. I think Python and JupyterLab are simply the best tools for Mathematics and Research. I like to fail fast and to fail forward, than do it again and again until something is almost perfect.

QuantumAnalytica - Cyber Security

After analyzing the web site logs you get better idea how internet really works, who are your real customers and what are they really doing with your products. Without analyzing your logs is like you are blind in the middle of the highway.

QuantumAnalytica - Knowing the customers using analytics

With correct and real time analytics you receive a correct image about your customers. If you know your customers than you can make even better products for them.