Linux/DevOps Migration Engineer (TeamCity)- 1-2 Month Remote Contract

Arctiq is a global, intelligence-driven technology services company delivering professional and managed services across Hybrid Cloud Infrastructure, Networking & Connected Experiences, Cybersecurity, Data & AI, Autonomous Operations & Intelligence, and Enterprise Service Management. We help organizations operate, secure, and modernize complex environments by unifying infrastructure, networking, data, security, automation, and observability under a single, integrated operating model. Our work focuses on helping customers reduce operational friction, improve resilience, and make better, faster decisions as their environments evolve. Arctiq builds on decades of industry expertise and a customer-centric ethos to deliver exceptional value to clients across diverse industries.We are seeking an experienced Linux systems administrator/DevOps engineer to assist with migrating a JetBrains TeamCity CI/CD server from an end-of-life operating system (CentOS 6.5) to a modern, supported platform (Amazon Linux 2023).The TeamCity server is a critical piece of the client's software development infrastructure. The current OS has reached end-of-life and no longer meets our security compliance requirements. The contractor will plan and execute a migration to a new OS while preserving the existing TeamCity version and all build configurations.This is a remote contract with one of Arctiq's clients. This will be a (1) month, 40 hour week contract or a (2) month, 20 hour week contract based on preference of candidate.Scope of WorkAssess the current TeamCity installation and document dependenciesPlan and execute a phased migration approach with sandbox/rehearsal testingStand up a new Amazon Linux 2023 EC2 instance with TeamCityMigrate the TeamCity data directory (~400 GB) to the new serverConfigure Apache httpd as a reverse proxy with SSL terminationValidate all build configurations, remote build agents, and integrationsCoordinate with internal IT on network/VPC changesDocument the migration process and any configuration changesEnvironmentPlatform:AWS EC2Current OS:CentOS 6.5Target OS:Amazon Linux 2023Application:JetBrains TeamCity (older version)Java:Oracle JDK 1.8 (Java 8)Database:MySQL (hosted on separate server, not part of migration scope)Web Server:Apache httpd (reverse proxy)Data Volume:~400 GBRequired Skills And ExperienceLinux system administration (RHEL/CentOS family, including legacy CentOS 6)AWS EC2 (instance provisioning, EBS volumes, AMI snapshots, security groups, VPC)JetBrains TeamCity administration (installation, configuration, data directory management, backup/restore)Server migration and cutover planning with minimal downtimeJava/JDK management on Linux (Java 8 specifically)Amazon Linux 2023Strongly PreferredCrowdStrike Falcon agent deployment on LinuxBash scripting for migration automationMySQL database administrationCI/CD pipeline design and TeamCity build configurationApache httpd configuration (reverse proxy, SSL)TeamCity upgrade experience (relevant for potential future phase)Nice to HaveExperience with CentOS major version upgrades (6 -> 7 -> 8 path)Familiarity with RPM package management and dependency resolutionNetworking / DNS cutover experienceExperience with configuration management tools (Ansible, Puppet, etc.)