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David Szabo, Software Developer in Székesfehérvár, Hungary
David Szabo

Software Developer in Székesfehérvár, Hungary

Member since July 28, 2016
David is a DevOps engineer with great communication skills and extensive experience in internet services. He is a former CEO and senior sysadmin of a webhosting company. He also has strong Linux and cloud infrastructure knowledge and the flexibility and willingness to use new technologies.
David is now available for hire

Portfolio

Experience

  • Ubuntu, 12 years
  • Linux, 12 years
  • System Administration, 9 years
  • DevOps, 3 years
  • Amazon Web Services (AWS), 2 years
  • Continuous Deployment, 2 years
  • AWS EC2, 2 years
  • Terraform, 2 years
Székesfehérvár, Hungary

Availability

Part-time

Preferred Environment

AWS, Linux, Bash, Git

The most amazing...

...system I've built is a HIPAA compliant, scalable, failure tolerant AWS environment with continuous deployment workflow.

Employment

  • DevOps Engineer

    2017 - PRESENT
    CodeBerry Programming School
    • Designed a secure and scalable microservices architecture in the Amazon cloud.
    • Built a CI/CD pipeline to automatize deploying processes and improve developers' workflow.
    • Used Terraform to make infrastructure changes trackable and consistent.
    • Acted as technical advisor for developers.
    • Supported the database transition from a standalone MongoDB server to MongoDB Atlas.
    Technologies: AWS, Terraform, Docker, BitBucket, Jenkins, MongoDB, Amazon Linux
  • System Admin Ubuntu

    2017 - 2017
    MiAM Tech, LLC (via Toptal)
    • Created production and several development environments using Ubuntu instances in the cloud and supported the dev team.
    • Set up multi-domain email infrastructure for securely sending and receiving messages.
    • Installed auto-renewable SSL certificates using Let's Encrypt.
    • Configured strict CSF firewall to avoid unwanted network traffic and login attempts.
    • Supported an open source team chat software solution installed on servers.
    Technologies: Ubuntu, AWS S3, Bash, Rocket.Chat, Let's Encrypt, Nginx, MongoDB, Postfix, Courier, PHP-FPM, DNS, Docker, CSF, Jitsi
  • Node/MySQL Initial DevOps

    2017 - 2017
    Sappira, Inc. (via Toptal)
    • Designed and built a HIPAA-compliant production and staging AWS environment.
    • Acted as technical advisor for developers.
    • Set up and configured auto-scaling for the AWS system.
    • Implemented automatic backup and restore processes.
    • Created infrastructure as code with Terraform and Ansible.
    Technologies: AWS, RDS, ELB, CloudFront, S3, Terraform, Ansible, Linux, Ubuntu, Nginx, Jenkins CI, GitHub, Node.js
  • AWS + RackSpace DevOps Engineer

    2016 - 2017
    Eduware, Inc. (via Toptal)
    • Migrated the existing application and database to a secure, scalable Amazon AWS cloud solution.
    • Revised existing configurations and made improvements to use AWS advantages.
    • Implemented new solutions based on cloud technologies, like load balancing and failure tolerance.
    • Set up a continuous deployments system with Jenkins and custom scripts.
    • Configured the monitoring system with automatic alerts with Zabbix.
    Technologies: Amazon AWS, Rackspace, Linux, Ubuntu, Nginx, Windows Server, MS SQL, Jenkins CI, Zabbix, Gitlab, IIS
  • Owner, CEO, and Senior Sysadmin

    2008 - 2016
    Fruit Hosting
    • Managed the entire hosting infrastructure, including production, backup, and management servers.
    • Customized the cPanel/WHM system based on marketing and user management requests.
    • Created automated management scripts to handle user accounts.
    • Monitored servers and resolved any kind of issues.
    • Collaborated with other teams in the company (helpdesk, marketing).
    • Migrated all user accounts (3000+) to a new and secure infrastructure.
    Technologies: Linux, Ubuntu, Debian, CentOS, Apache, PHP, MySQL, PostgreSQL, DNS, Bash, Munin, Nagios, cPanel, WHM, Perl
  • Junior Sysadmin

    2006 - 2008
    Datatrans Internet
    • Acted as second-level technical support (personal, email, phone).
    • Configured DNS servers based on user requests and managed domain registrations.
    • Assisted with internal development processes with cooperation of sales and helpdesk teams.
    • Created websites for customers using PHP.
    • Developed custom tools for data analysis and automated tests to improve development and decision making processes.
    Technologies: Linux, Apache, DNS, FTP, MySQL, WIFI network, Munin, Bash, PHP, HTML, CSS

Experience

  • Environment Transition for a Fast-growing Startup to a Microservice-oriented Infrastructure (Development)

    The number of users of this online learning platform grew dramatically, so the infrastructure needed to be redesigned. The final result was a fast, secure and scalable cloud solution, which also supports developers' effective workflow.

  • Scalable AWS Infrastructure for High-traffic Campaign Website (Development)

    Created an auto-scaling environment using AWS services to serve high-traffic website using Terraform. The system was prepared to handle short-term peaks by setting up fast modification periods which helped to keep it cost effective too.

  • Migration of Complete Web Hosting Infrastructure (Development)

    Migrated a few thousands hosting accounts to a new, scalable, secure, and fast infrastructure. Resolved all issues, client requests, and dependencies. This project took about a year from planning to completion.

  • DokuWiki Translation and Plugin Repair (Other amazing things)
    https://translate.dokuwiki.org/?lang=hu

    I frequently put in volunteer time contributing to translation projects at DokuWiki and also in plugin development, both open source.

Skills

  • Languages

    Bash Script, Bash, HTML, PHP
  • Tools

    Terraform, Let's Encrypt, AWS Auto-scaling, Amazon Virtual Private Cloud (VPC), Postfix, Apache, Nginx, Ansible, Docker Compose, Munin, Nagios, AWS EBS, AWS ELB, Amazon CloudFront CDN, Zabbix, GitLab, Jenkins, Git, Chef
  • Paradigms

    DevOps, Continuous Deployment, Continuous Integration (CI), Continuous Delivery (CD)
  • Platforms

    Ubuntu Linux, CentOS, Debian, Ubuntu, Linux, Amazon Web Services (AWS), DigitalOcean, Icinga2, Docker, Icinga, AWS EC2, WordPress, Windows Server
  • Storage

    LAMP Server, AWS S3, MariaDB, Auto-scaling Cloud Infrastructure, AWS RDS, AWS Elastic File System, MySQL, Microsoft SQL Server, SQLite
  • Other

    Email Systems, HTTPS, HTTP, Ubuntu Server, Bash Scripting, Courier, IMAP, POP3, SMTP, DNS Servers, DNS Configuration, Domain DNS Setup, Server Administration, Migration, Server Migration, DNS, System Administration, BIND9, Infrastructure Architecture, Infrastructure as Code, Infrastructure, Network Monitoring, IT Infrastructure Management, Network Security, IT Infrastructure, AWS Route 53, Infrastructure monitoring, NFS

Education

  • Bachelor's degree in Electrical Engineering
    2006 - 2012
    Óbuda University, Internet/Network Faculty - Hungary, Szekesfehervar
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