Site Reliability Engineer

ALOIS Solutions; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Job summary

ALOIS Solutions is seeking a Senior Application Production Support Engineer to join the Enterprise Operations team in Warsaw. The role requires 5–7 years of hands-on experience supporting Java-based enterprise applications and strong troubleshooting across Java, Linux, and SQL stacks.

You will participate in ITSM processes, monitor performance, assist deployments, and collaborate with Development, Infrastructure and Business teams to drive service improvements in a fast-paced environment.

Qualifications

• 5 to 7 years of proven experience in Application Production Support or Application Maintenance.
• Strong troubleshooting across Java/Linux/SQL stacks and RCA abilities.
• Excellent communication and collaboration with cross-functional teams.

Responsibilities

• Provide Tier 2/Tier 3 production application support for high-throughput enterprise systems.
• Perform deep-dive troubleshooting and root cause analysis (RCA) on Java-based applications.
• Manage, support, and troubleshoot applications hosted on large-scale Unix/Linux server infrastructure.
• Execute complex SQL queries to investigate data anomalies.
• Proactive monitoring of performance, JVM memory/CPU, and server health with enterprise tools.
• Active participation in ITSM processes: Incident, Problem, and Change Management.
• Assist with deployments, releases, and post-implementation verification.
• Collaborate with Development, Infrastructure and Business teams to resolve issues.

Skills

Java applications

JVM concepts

SQL

Unix/Linux

ITSM practices

Incident/Problem/Change mgmt

Monitoring/alerts

Root cause analysis

Communication

Tools

AppDynamics

Datadog

Splunk

ServiceNow

Jira

Job description

We are seeking an experienced Senior Application Production Support Engineer with 5 to 7 years of hands‑on expertise to join our Enterprise Operations team. In this role, you will play a critical part in ensuring the high availability, stability, and optimal performance of our core enterprise Java applications.

If you thrive in fast‑paced environments, possess strong technical troubleshooting skills across Java/Linux/SQL stacks, and excel at root cause analysis, we want to hear from you.

Key Responsibilities

• Application Maintenance & Incident Management: Provide Tier 2/Tier 3 production application support for high-throughput enterprise systems, ensuring high availability, stability, and adherence to strict Service Level Agreements (SLAs).
• Troubleshooting & Diagnostics: Perform deep‑dive troubleshooting and root cause analysis (RCA) on Java-based applications, reading stack traces, analyzing JVM health, and inspecting system/application logs.
• Environment & Systems Administration: Manage, support, and troubleshoot applications hosted on large‑scale Unix/Linux server infrastructure.
• Database Querying & Analysis: Execute complex SQL queries to investigate data anomalies, conduct data validation, and support issue resolution.
• Proactive Monitoring: Track application performance, JVM memory/CPU utilization, and server health using enterprise monitoring tools to catch potential failures before they impact users.
• ITSM Governance: Active participation in IT Service Management practices, including Incident, Problem, and Change Management workflows.
• Deployment & Release Support: Assist with application deployments, software releases, and post‑implementation verification.
• Cross‑Functional Collaboration: Partner closely with Development, Infrastructure, and Business teams to resolve complex technical issues and drive continuous service improvements.

Key Qualifications & Skills

Experience: 5 to 7 years of proven experience in Application Production Support or Application Maintenance.

Core Technical Stack

• Strong hands‑on experience supporting Java applications and a solid grasp of modern application architectures.
• Good understanding of JVM concepts (garbage collection, heap memory, thread dumps) and log analysis techniques.
• Strong proficiency in SQL for data analysis and investigation.
• Hands‑on command line experience in Unix/Linux environments, including server‑level troubleshooting.

Operational Expertise

• Proven experience supporting enterprise applications on large‑scale server infrastructures.
• Strong understanding of ITSM framework processes (Incident, Problem, and Change Management).
• Prior experience with enterprise monitoring, alerting, and ticketing tools (e.g., AppDynamics, Datadog, Splunk, ServiceNow, Jira).
• Exceptional analytical, critical thinking, and problem‑solving abilities.
• Excellent verbal and written communication skills to interact clearly with technical and non‑technical stakeholders.
• Ability to multitask and perform under pressure in a fast‑paced environment.