DevOps Engineer

DevOps-Ingenieur mit 8 Jahren Erfahrung mit vorheriger Erfahrung als Programmierer. Derzeit arbeitet er an der Anwendungsinfrastruktur auf Kubernetes und Docker, erstellt CI/CD-Pipelines, erstellt Images und stellt Server bereit. Darüber hinaus sichert er die Cloud-Infrastruktur in AWS und stellt sie bereit, führt Microservice-basierte Entwicklung sowie Containerisierung durch. Es ist ein großes Projekt mit 300 virtuellen PCs und 200 Punkten. Er programmiert in Bash (Experte), Golang und C++. Er benutzt auch aktiv Debian Linux um Server zu installieren und arbeitet mit Terraform, Helm, CircleCI, DataDog, GitHub, CircleC. Er ist an die agile Umgebung bei Kanban gewöhnt, wo es tägliche Sprints gibt. Er hat in der Vergangenheit ein Team von 4 Entwicklern geleitet und ist offen dafür, dies in Zukunft wieder zu tun. Er spricht Englisch auf einem kommunikativen Niveau.

Senior DevOps, Senior Software Developer

(January 2015 – Recent)

• Provisioned infrastructure and managed deployments for a large-scale worldwide multitenant SaaS platform.
• Led the full transition process from VMware ESXi to cloud computing, ensuring seamless integration.
• Developed custom applications to address specific product and DevOps requirements.
• Demonstrated expertise in the entire application lifecycle, including code writing, CI/CD compilation, testing, containerization, cloud infrastructure provisioning, deployment, operation, and monitoring.
• Automated repetitive tasks and created in-house automation tools to improve efficiency.
• Ensured high availability of enterprise-grade operations.
• Advanced knowledge of AWS services such as VPC, EC2, EBS, EFS, EKS, TGW, RDS, and Route53.
• Proficient in Terraform, Kubernetes, Helm, Docker, DataDog, CircleCI, and GitHub for efficient development and deployment.
• Experienced with VMware ESXi and Linux Debian for virtualization and server management.
• Skilled in working with various databases, including PostgreSQL, MySQL, Redis, ElasticSearch, and MongoDB, as well as message broker RabbitMQ.
• Familiarity with Nginx and LetsEncrypt for web server and SSL certificate management.
• Proficient in Golang, Bash, and C/C++ for development tasks.
• Knowledgeable in OpenVPN, IPsec, and Postfix for secure communication.
• Well-versed in networking concepts, particularly in cloud environments, Linux, dedicated network elements, and network packet analysis.

Senior Software Developer, Server Administrator

(January 2009 – Recent)

• Developed software and provided services for internet service providers, focusing on television over internet and voice over internet.
• Led the development of large client-server information systems for customer administration and billing, internet, IPTV & VoIP infrastructure administration, and network device configuration.
• Implemented an antifraud system to detect and prevent attacks against VoIP PBX.
• Proficient in various programming languages, including Delphi, PHP, C++, and C#, for different projects.
• Skilled in server installation, upgrade, administration, security, backup, and monitoring, with expertise in Debian Linux, RedHat Linux, PostgreSQL, Oracle, Apache, DHCP, DNS, and VMWare ESXi virtualization.
• Experienced in network traffic analysis and setting up high availability for Apache & PostgreSQL.

HW & SW Developer, Production Manager

(January 2002 – December 2008)

• Worked on wireless (2.4 GHz & 433 MHz) and wired voting systems for city councils and questionnaires at congresses.
• Developed Delphi test and support utilities.
• Proficient in Atmel AVR ANSI C firmware, Atmel AVR HW design, Atmel x51 Assembler, and Atmel x51 HW design.
• Conducted Eagle PCB layout and managed production processes.

Delphi & MS-SQL Developer

(July 2002 – December 2007)

• Developed an information system for a specialized wholesale/retail company, focusing on registration, billing, inventory management, and purchase planning.
• Led the development of a large client-server system to handle various aspects of the business operations.
• Utilized Delphi and MS SQL for efficient software development and database management.

HW & SW Developer, Production Manager

(January 2003 – December 2006)

• Worked on a system for text and voice messages at underground stations in Prague.
• Developed an extensive client-multi-server system with high availability, automatic and semi-automatic reporting, distribution of reports, and automatic data synchronization between nodes.
• Proficient in using Delphi and Firebird for software development.
• Skilled in Atmel x51 Assembler, Atmel x51 HW design, and Eagle PCB layout for hardware development.
• Managed production processes for efficient system deployment