Senior Java Developer / Site Reliability Engineer (SRE)

Location: Krakow

Type of work: Hybrid (2-3 days per week in office)

Contract: Contract of employment only

Please note: We can not consider candidates who require company support to legally live and work in Poland.

This role is level 3 support for all PPT products and requires participation in on‑call rotation.

On‑call: Approximately one weekend per month, 9‑5 CEST.

About the role

We are seeking a highly skilled and proactive Senior Java Developer with strong Site Reliability Engineering (SRE) capabilities to join our team. This role is ideal for someone who thrives in a fast‑paced environment, enjoys solving complex problems, and is passionate about building resilient, scalable systems.

Key responsibilities

• Design, develop, and deploy multi‑tiered web‑based enterprise applications using Java and J2EE technologies (Spring, Hibernate, JDBC, JNDI, IBM MQ Series, Web Services – SOAP/REST).
• Provide architectural and practical guidance to improve system resiliency, performance, efficiency, and cost optimisation.
• Troubleshoot and debug complex production issues across distributed systems.
• Participate in Agile ceremonies and contribute to analysis, design, coding, and unit testing phases.
• Support production environments, manage incidents, and perform root cause analysis.
• Monitor system health using tools like Splunk, Prometheus, Grafana.
• Work with messaging and data technologies such as Kafka, Cassandra, Oracle, and MySQL.
• Develop scripts in Python and/or Bash for automation and operational tasks.
• Collaborate with cross‑functional teams to ensure high availability and reliability of services.
• (Optional) Contribute to mobile SDK development if applicable.

Required qualifications

• Proven experience in Java development and microservices architecture.
• Strong troubleshooting and debugging skills in complex environments.
• Hands‑on experience with observability tools (Splunk, Prometheus, Grafana).
• Familiarity with distributed systems and messaging platforms (Kafka).
• Experience with databases: Oracle, MySQL, Cassandra.
• Proficiency in scripting languages (Python and/or Bash).
• Solid understanding of Agile methodologies.
• Exposure to mobile SDKs is a plus.

We offer

• Working with a state‑of‑the‑art hotel property management system.
• Opportunity to make a high‑impact, game‑changing contribution to the industry.
• Comprehensive benefits package: language courses, free medical care, life insurance, and access to a benefits platform.

Why Infosys

Infosys is a global leader in next‑generation digital services and consulting. We enable clients in 46 countries to navigate their digital transformation. With nearly four decades of experience, we empower enterprises through AI‑powered core systems and agile digital strategies that deliver unprecedented performance and customer delight.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Information Technology

Industries

IT Services and IT Consulting and Software Development