Senior Infrastructure Engineer (Linux, Database)

Behind every reliable transaction is a great infrastructure team. Join us as a Senior Infrastructure Engineer (Linux & Database) and help maintain the stability, performance, and security of critical business systems. You'll work with Linux, databases, automation, and modern infrastructure technologies while collaborating with experts across the organization. Your Role As a Senior Infrastructure Engineer (Linux & Database), you will play a key role in ensuring the stability, performance, and reliability of business-critical transactional systems. Working across Linux environments, databases, and automation tools, you will investigate complex issues, support day-to-day operations, and help maintain secure and efficient services. In collaboration with technical teams and stakeholders, you will contribute to delivering seamless and high-quality service experience in a dynamic environment. Your Tasks Monitor, support, and maintain transactional systems to ensure their stability and performance.Investigate, troubleshoot, and resolve system-related incidents and operational issues.Work with Linux environments and use command-line tools to support day-to-day operations.Analyze and manage data within relational databases, including creating and executing complex SQL queries.Perform data validation, investigation, and updates when required.Develop and use scripts in Bash or Python to automate and improve operational processes.Support containerized and cloud-based environments, including Kubernetes.Collaborate with internal teams and stakeholders to ensure effective service delivery and issue resolution.Your Profile You are fluent in Polish and English, enabling effective communication in an international environment.You have approximately 4 years of experience in a similar role supporting transactional systems.You have strong hands-on knowledge of Linux, including confident use of the command line.You have strong knowledge of relational databases such as SQL, Oracle, or PostgreSQL, and can write complex SELECT and UPDATE queries.You have experience with scripting languages such as Bash or Python.You have a basic understanding of Kubernetes and modern infrastructure environments.You are available to work from the client’s office in Kraków 8 days per month and can work within a schedule of 8:00–18:00, including an average of one working weekend per month (compensated with two additional days off).Experience with Docker, Google Cloud Platform (GCP), or within the financial services industry will be an advantage.