toptal.com
Contact us: +1.888.604.3188
David Szabo, Linux System Administration Developer in Székesfehérvár, Hungary
David Szabo

Linux System Administration Developer in Székesfehérvár, Hungary

Member since July 28, 2016
David is a DevOps engineer with great communication skills and extensive experience in Amazon Web Services. He has strong infrastructure as code, continuous delivery and cloud infrastructure knowledge, and the flexibility and willingness to use new technologies.
David is now available for hire
Hire David

Portfolio

Experience

Location

Székesfehérvár, Hungary

Availability

Part-time

Preferred Environment

Cloud Infrastructure, Agile, Docker, Terraform, CI/CD Pipelines, DevOps, Amazon Web Services (AWS), Linux

The most amazing...

...cloud infrastructure I've built is a scalable, failure tolerant AWS environment with continuous deployment workflow for a global career matching platform.

Employment

  • AWS DevOps Engineer

    2019 - 2020
    Tremor Technologies, Inc. (via Toptal)
    • Implemented a Terraform infrastructure as code (IaC) solution for a redesigned AWS microservices architecture.
    • Monitored AWS cloud resources and provided security and performance reports.
    • Automatized the creation of custom AWS AMIs using Packer, decreasing recurring manual maintenance work.
    • Modified and optimized continuous delivery pipelines to work with the new environment.
    • Acted as technical advisor for developers and supported their daily work.
    Technologies: Monitoring, Site Reliability Engineering (SRE), Security, Infrastructure, Networking, Site Reliability, AWS, Bash Scripting, Cloud Infrastructure, Agile, Docker, Git, Network Security, Linux System Administration, Linux, AWS ECR, AWS ECS, AWS S3, AWS Route 53, AWS Certificate Manager, GitHub, Packer, AWS Lambda, Infrastructure as Code (IaC), Serverless Architecture, Jenkins, AWS IAM, AWS EC2, Terraform, CI/CD Pipelines, DevOps, Amazon Web Services (AWS)

  • Platform Engineer

    2018 - 2018
    Sokanu (via Toptal)
    • Designed a secure and scalable microservices architecture in the AWS cloud.
    • Used Terraform to create and manage a consistent and trackable infrastructure.
    • Assisted in full transition and data migration from another cloud provider.
    • Modified and optimized CI/CD pipelines to work with the new environment.
    • Acted as technical advisor for software developers.
    Technologies: Monitoring, Site Reliability Engineering (SRE), Security, Infrastructure, Networking, Site Reliability, Grafana, AWS IAM, AWS, AWS EC2, Infrastructure as Code (IaC), Bash Scripting, Cloud Infrastructure, Agile, Git, CI/CD Pipelines, Network Security, Linux System Administration, Linux, DevOps, PostgreSQL, Django, Python, Continuous Delivery (CD), Continuous Integration (CI), Sentry, Datadog, Sumo Logic, CircleCI, GitHub, Docker, Ubuntu, Nginx, Terraform, Identity & Access Management (IAM), ACM, AWS S3, Amazon CloudFront CDN, Amazon Route 53, ECS, Amazon Web Services (AWS)

  • DevOps Engineer

    2017 - 2018
    Adverator (via Toptal)
    • Acted as technical advisor for developers.
    • Reviewed existing infrastructure and provided security and performance reports.
    • Discovered infrastructure resources and created a detailed network diagram.
    • Monitored servers and resolved any kind of issues.
    • Created an automatic backup system to store daily snapshots of EC2 instances.
    Technologies: Monitoring, Site Reliability Engineering (SRE), Security, Infrastructure, Networking, Site Reliability, AWS IAM, AWS, AWS EC2, Bash Scripting, Cloud Infrastructure, Agile, Docker, Git, CI/CD Pipelines, Network Security, Linux System Administration, DevOps, GitHub, Ubuntu, Linux, Continuous Delivery (CD), Continuous Integration (CI), PHP, Nginx, AWS S3, Amazon CloudFront CDN, AWS ELB, Amazon Web Services (AWS)

  • DevOps Engineer

    2017 - 2018
    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: Monitoring, Site Reliability Engineering (SRE), Security, Infrastructure, Networking, Site Reliability, AWS IAM, AWS EC2, Infrastructure as Code (IaC), Bash Scripting, Cloud Infrastructure, Agile, Git, CI/CD Pipelines, Network Security, Linux System Administration, Linux, DevOps, Amazon Web Services (AWS), Amazon Linux, MongoDB, Jenkins, Bitbucket, Docker, Terraform, AWS

  • System Administrator

    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: Amazon Web Services (AWS), Monitoring, Site Reliability Engineering (SRE), Security, Infrastructure, Networking, Site Reliability, AWS, AWS EC2, Bash Scripting, Cloud Infrastructure, Agile, Git, Network Security, Linux System Administration, System Administration, Linux, Jitsi, ConfigServer Security & Firewall (CSF), Docker, DNS, PHP-FPM, Courier, Postfix, MongoDB, Nginx, Let's Encrypt, Rocket.Chat, AWS S3, Ubuntu

  • DevOps Engineer

    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: Monitoring, Security, Infrastructure, Networking, Site Reliability, AWS IAM, AWS EC2, Infrastructure as Code (IaC), Bash Scripting, Cloud Infrastructure, Agile, Docker, Git, CI/CD Pipelines, Network Security, Linux System Administration, DevOps, Amazon Web Services (AWS), Node.js, GitHub, Jenkins, Nginx, Ubuntu, Linux, Ansible, Terraform, AWS S3, Amazon CloudFront CDN, AWS ELB, Relational Database Services (RDS), AWS

  • 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: Monitoring, Security, Infrastructure, Networking, Site Reliability, AWS IAM, AWS EC2, Bash Scripting, Cloud Infrastructure, Agile, Git, CI/CD Pipelines, Network Security, Linux System Administration, DevOps, Amazon Web Services (AWS), IIS, GitLab, Zabbix, Jenkins, Microsoft SQL Server, Windows Server, Nginx, Ubuntu, Linux, Rackspace, Amazon, AWS

  • 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: Monitoring, Site Reliability Engineering (SRE), Security, Infrastructure, Networking, Site Reliability, Bash Scripting, Cloud Infrastructure, Network Security, Linux System Administration, System Administration, Perl, Web Host Manager (WHM), cPanel, Nagios, Munin, DNS, PostgreSQL, MySQL, PHP, Apache, CentOS, Debian, Ubuntu, Linux

  • 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: Monitoring, Site Reliability Engineering (SRE), Security, Infrastructure, Networking, Site Reliability, Bash Scripting, Network Security, Linux System Administration, System Administration, WiFi, CSS, HTML, PHP, Munin, MySQL, FTP, DNS, Apache, Linux

Experience

  • Implementation of an Infrastructure-as-code (IaC) Solution for a Serverless AWS Architecture

    The development team decided to transform its monolith application into serverless microservices. The AWS infrastructure got redesigned using Terraform and became more robust and scalable. The continuous delivery pipelines got aligned with this new system.

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

    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

    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

    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.

Skills

  • Languages

    Bash Script, Bash, Perl, CSS, Python, HTML, PHP

  • Libraries/APIs

    Jenkins Pipeline, Node.js

  • Tools

    AWS CloudWatch, AWS CLI, AWS CloudFormation, AWS IAM, AWS CloudTrail, Terraform, Let's Encrypt, Amazon Virtual Private Cloud (VPC), AWS EBS, Postfix, Amazon CloudFront CDN, Jenkins, Apache, Nginx, Git, AWS ECR, Packer, Amazon SQS, Docker Compose, Munin, Nagios, AWS ELB, Zabbix, GitLab, GitHub, AWS ECS, PHP-FPM, ConfigServer Security & Firewall (CSF), Bitbucket, Sumo Logic, Sentry, AWS CodeDeploy, AWS CodeBuild, AWS CodeCommit, Grafana, Ansible, Chef, CircleCI

  • Paradigms

    Agile, DevOps, Microservices Architecture, Serverless Architecture, Continuous Development (CD), Continuous Deployment, Continuous Integration (CI), Continuous Delivery (CD), Microservices, Lambda Architecture

  • Platforms

    AWS ALB, AWS Lambda, Docker, AWS EC2, Ubuntu Linux, CentOS, Debian, Ubuntu, Linux, Amazon Web Services (AWS), Apache Server, AWS Elastic Beanstalk, Amazon Linux AMI, DigitalOcean, Icinga2, Icinga, cPanel, Amazon, Rackspace, Rocket.Chat, Amazon Linux, WordPress, Windows Server

  • Industry Expertise

    Security, Network Security

  • Storage

    LAMP Server, AWS S3, AWS Elastic File System, MariaDB, Auto-scaling Cloud Infrastructure, MySQL, PostgreSQL, MongoDB, Datadog, AWS DynamoDB, AWS SWF, Redis, Microsoft SQL Server, SQLite

  • Other

    AWS, SysOps, AWS Cloud Architecture, AWS DevOps, CI/CD Pipelines, AWS Certificate Manager, Site Reliability Engineering (SRE), Cloud Infrastructure, AWS Certified SysOps Administrator, Site Reliability, Linux Server Administration, Shell Scripting, Load Balancers, Elastic Load Balancers, Dynamic Load Balancing, Networking, Monitoring, Email Systems, Infrastructure as Code (IaC), HTTPS, HTTP, Ubuntu Server, AWS Auto-scaling, Infrastructure, Bash Scripting, Courier, IMAP, POP3, SMTP, DNS Servers, DNS Configuration, Domain DNS Setup, AWS Route 53, Server Administration, Migration, Server Migration, DNS, System Administration, Linux System Administration, Web Servers, HTTP Server, AWS Certified DevOps Engineer, Cloud Security, Cloud, Networks, Network Architecture, Serverless, Scalability, Web Scalability, Architecture, BIND9, Infrastructure Architecture, Network Monitoring, IT Management, IT Infrastructure, Infrastructure Monitoring, Web Host Manager (WHM), FTP, WiFi, IIS, Relational Database Services (RDS), Jitsi, ECS, Amazon Route 53, ACM, Identity & Access Management (IAM), AWS CodePipeline, NFS

  • Frameworks

    Django, AWS HA

Education

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

Certifications

  • AWS Certified DevOps Engineer – Professional
    FEBRUARY 2020 - FEBRUARY 2023
    AWS
  • AWS Certified SysOps Administrator – Associate
    FEBRUARY 2020 - FEBRUARY 2023
    AWS
  • DevOps Engineering on AWS
    AUGUST 2018 - PRESENT
    ExitCertified

To view more profiles

Join Toptal
Share it with others
Hire the top 3% of freelance developers TM