commit ad9cab2e9f189bf4979eedb84a4fc22c4cba99cf
Author: root <none>
Date: Mon, 20 Jul 2026 17:32:24 +0200
add cv
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+\documentclass[10pt,letterpaper]{article}
+\usepackage[T1]{fontenc}
+\usepackage{lmodern}
+\usepackage[letterpaper,left=0.60in,right=0.60in,top=0.55in,bottom=0.55in]{geometry}
+\usepackage{tabularx}
+\usepackage{array}
+\usepackage{enumitem}
+\usepackage[hidelinks]{hyperref}
+\usepackage{titlesec}
+\usepackage{microtype}
+\pagestyle{empty}
+\setlength{\parindent}{0pt}
+\setlength{\parskip}{0pt}
+\setlength{\emergencystretch}{2em}
+\urlstyle{same}
+
+\titleformat{\section}{\bfseries\fontsize{12.5}{14}\selectfont}{}{0pt}{}[\vspace{-1pt}\titlerule]
+\titlespacing*{\section}{0pt}{7pt}{4pt}
+
+\newcommand{\job}[3]{%
+ \vspace{4pt}\noindent\begin{tabularx}{\textwidth}{@{}>{\bfseries}p{1.62in}>{\bfseries}lX@{}}
+ #1 & #2 & \normalfont{}- #3
+ \end{tabularx}\vspace{2pt}%
+}
+\newenvironment{cvitems}{%
+ \begin{itemize}[label=-,leftmargin=0.28in,labelsep=0.08in,itemsep=0pt,parsep=0pt,topsep=1pt,partopsep=0pt]
+ \setlength{\itemindent}{0pt}
+}{\end{itemize}\vspace{1pt}}
+
+\begin{document}
+\fontsize{10.5}{12.3}\selectfont
+
+\begin{center}
+{\fontsize{17}{19}\selectfont Imre Viktor Ranga}\par
+\vspace{1pt}
+{Linux System Engineer}\par
+\vspace{1pt}
+Mobile: +35699781271 \quad|\quad E-Mail: \href{mailto:contact@viktor1993.net}{contact@viktor1993.net} \quad|\quad Website: \url{https://www.viktor1993.net}\par
+EU Citizen \quad|\quad Location: EU (Immediate relocation within EU possible)
+\end{center}
+\vspace{4pt}
+
+\section*{Summary}
+\vspace{2pt}
+Linux System Engineer with several years of experience deploying and operating production infrastructure in high-availability
+financial environments. Strong background in automation and scripting, system monitoring, and incident response,
+with additional depth in database systems and performance troubleshooting. Proven track record of delivering
+measurable operational improvements, in many cases, accelerating critical production query speeds by 5x-20x.
+
+\section*{Experience}
+\job{Jun 2024 - Present}{Database Administrator (DBA)}{flatexDEGIRO AG}
+\begin{cvitems}
+\item Performed database version upgrades, automated server deployments (ansible), routinely analysed and rewrote slow queries, and performed schema improvements for unoptimizable queries with heavy aggregation workloads, supported zero-downtime database upgrades and disaster recovery testing
+\item Developed ansible playbook for automated MariaDB and PostgreSQL microdb provisioning, reducing deployment time to $<$5 minutes
+\item Created summary tables to speed up client-facing queries needed to fetch portfolio data, cutting latency by 20x, improving API response times for the frontend
+\item Rebuilt foreign currency exposure calculation on billions of rows using pre-aggregated summary tables, reducing runtime from 6 hours to 15 seconds, enabling timely monitoring for risk management
+\item Designed and implemented a git driven pipeline that builds database docker containers from configuration changes for ephemeral test instances, isolating test data per instance to eliminate cross team data overwrites
+\item Built monitoring infrastructure using Prometheus/Grafana for (MariaDB and PostgreSQL) database metrics, integrated alert delivery to other platforms (E-mail, JIRA, MS Teams) for faster incident response
+\end{cvitems}
+
+\job{Nov 2020 - May 2024}{Site Reliability Engineer (SRE)}{flatexDEGIRO AG}
+\begin{cvitems}
+\item Acted as a general problem-solver across teams, investigated root causes of production outages and implemented fixes to prevent recurrence
+\item Led SRE role in a MySQL 5.7 to MariaDB 10.4.29 migration, overseeing test environment setup and executing the switchover. Identified and resolved query incompatibilities, including an issue that caused MariaDB crashes
+\item Reduced critical ETL pipeline execution time by 67\%, improving reliability of client-facing data
+\item Set-up new git based deployment automation for team, allowing for easy rollback of scripts via a single trigger from the ticketing system, improving deployment safety and incident recovery
+\end{cvitems}
+
+\job{Mar 2019 - Oct 2020}{PHP Developer}{DEGIRO BV}
+\begin{cvitems}
+\item Owned maintenance and feature development for a production PHP application, ensuring stability and performance as sole team member
+\item Implemented new test environment deployment using ansible for a multi-service system (application, database, cache, search), reducing the time to deploy from hours to seconds by eliminating manual steps
+\item Planned and executed an upgrade of SugarCRM from version 8 to 9 (and MySQL 5.6 to 5.7) on a heavily customized system, achieving minimal business impact with all post-upgrade issues stabilized within 24 hours
+\item Transitioned to SRE team after onboarding a new 3-person dev team to take over CRM responsibilities
+\end{cvitems}
+
+\job{Apr 2018 - Feb 2019}{jr PHP Tester}{DEGIRO BV}
+\begin{cvitems}
+\item Resolved email save failures caused by database specific UTF-8 encoding limitations (e.g. emoji characters), restoring reliable message storage
+\item Rewrote case handling logic in the CRM to fix a bug that blocked the ability to reply to unrecognized prospects, unblocking normal communication workflows
+\end{cvitems}
+
+\job{Feb 2017 - Mar 2018}{jr Business Developer}{DEGIRO BV}
+\begin{cvitems}
+\item Translated the website/documents, localized PR/marketing content, conducted market research, wrote scripts to automate various front-office tasks
+\end{cvitems}
+
+\newpage
+\section*{Education}
+\textbf{2016 - 2017}
+\begin{cvitems}
+\item Russian Language, Novosibirsk State University of Architecture and Construction, Novosibirsk, Russian Federation
+\end{cvitems}
+\textbf{2011 - 2015}
+\begin{cvitems}
+\item Bachelor of Science (Hons) Physics - Second Class Upper Division (2:1), University of the West of Scotland, Paisley, United Kingdom\\
+\textit{Bachelor's Thesis:} Floquet-Bloch Theory of an Electron in an Array of Square Barriers [Grade A, 78.5\%]
+\end{cvitems}
+\textbf{2005 - 2011}
+\begin{cvitems}
+\item Secondary Education, Inverness High School, Inverness, United Kingdom
+\end{cvitems}
+
+\section*{Skills}
+\renewcommand{\arraystretch}{1.12}
+\begin{tabularx}{\textwidth}{@{}>{\bfseries}p{1.62in}X@{}}
+Databases & MariaDB, MaxScale, MySQL, PMM, PostgreSQL; query optimization, performance tuning, replication and failover, backups/restore\\
+Infra and Tooling & Git, ZFS + sanoid, Apache, Ansible, Docker, Prometheus, Terraform, Elasticsearch, Node.js + pm2, Redis, Zabbix\\
+Languages/Scripting & PHP, JavaScript, Bash (sed, awk), Perl, Python\\
+Editors/Environments & GNU/Linux (Debian and Red Hat derivatives), kvm/qemu, vim/vimscript, systemd, LaTeX\\
+Miscellaneous & Incident Analysis, Monitoring and Logging, Automation, Disaster Recovery, Operational Mentoring
+\end{tabularx}
+
+\end{document}