Senior System Engineer

iyzico iyzico was founded in 2013 to provide online payment services and artificial intelligence-based payment technologies to businesses of various sizes in the world of e-commerce. By making the complex payment processes simple through its easy and secure platform, iyzico had achieved significant successes through supporting thousands of businesses in digitalization and was acquired by the global payment systems giant PayU in 2019. With such a robust structure, iyzico is operating on the principle of democratizing financial services and making them accessible for everyone alongside the services it provides to businesses. Through iyzico Buyer Protection, consumers’ concerns regarding shopping online are resolved and better experiences are enabled. Control is handed back to the consumers by 24/7 live support through the iyzico mobile app and convenience in cancellation/returns processes. To this date, more than 2 million consumers shopped online under the security provided by iyzico Buyer Protection and this number is increasing daily. Via pay with iyzico, which is a blended payment solution, millions of consumers who do not use banking can safely shop online under the belt of iyzico Buyer Protection. iyzico continues to simplify online shopping for both consumers and sellers by the simple, accessible, and innovative technologies it developed. Key Responsibilities Design, deploy, and maintain robust production/test environments across enterprise Linux and public Cloud platforms. Manage and automate system configurations, provisioning, and environment builds using tools such as Terraform and Ansible. Oversee enterprise storage solutions, define lifecycle policies, and manage reliable backup and disaster recovery strategies. Help architect and maintain resilient system infrastructure optimized for AI-agentic workflows and automated execution pipelines. Support development teams by managing, automating, and maintaining CI/CD environments and application deployment pipelines. Enforce server/network security policies, maintain proactive patch management, track CVEs, and apply system hardening standards. Ensure 24/7 high availability using monitoring, centralized logging, and proactive incident response tooling. Qualifications & Experience Minimum 5 years of experience as a System Engineer, Systems Administrator, or Infrastructure Engineer. Strong background in Linux-based environments, system administration, kernel tuning, and troubleshooting. Hands-on experience with at least one major public cloud provider (Google Cloud, AWS, Azure or Tencent Cloud). Practical experience with Terraform for infrastructure management and Ansible (or Puppet/Chef) for configuration automation. Solid knowledge of storage systems (SAN/NAS/Object Storage) and enterprise backup/restore operations. Experience with container technologies (Docker, Podman) and orchestration engines (Kubernetes or Docker Swarm). Familiarity with observability and logging stacks (Prometheus, Grafana, Zabbix, Elasticsearch, Splunk) and messaging systems (RabbitMQ, Kafka, etc.). Nice to Have Interest in or exposure to AI-agentic architectures, workflow automation, and LLM deployment infrastructure. Understanding of load balancing and caching mechanisms (Nginx, HAProxy, Redis). Knowledge of VCS tools (Git/GitLab) and deploying Java/modern applications within CI/CD pipelines. Strong documentation discipline and a structured, security-first approach to systems engineering. What We Offer • A culture of continuous development: conferences, in-house events & Tech Talks to stay up-to-date on current research and technology. P.S.:You do not need to wait to get on the stage and share your expertise with you teammates and the community • Online Training Platform (Free access to Udemy, Harvard ManageMentor, Get abstract, etc.), • Freedom under responsibility is our common mindset. That’s how we designed our flexible working model called, • iyzico Homequarters. Our homequarters is in Altunizade, • Meal & Internet Allowance, • Transportation Allowance, • A gift voucher to meet tech needs and ergonomic workspace at home, • Macbook (and monitor if needed), • Employee support program: free psychological counseling, legal advice, financial advice etc. • Private health insurance, • 1 day birth day leave, • An iyzicoMate is assigned to help you with anything you may need on your onboarding, • A detailed orientation program designed for you to fully grasp the iyzico culture.