Site Reliability Engineer
L2 Application Support Engineer (f/m/x)
Warsawsenior
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We are looking for an experienced Application Support Engineer to join a long-term technology team supporting business-critical applications in a high-availability environment.
You will combine technical troubleshooting with a reliability-focused approach, working closely with engineering, platform, and infrastructure teams. The role also offers an opportunity to develop toward a senior reliability and operational engineering path.
The position is based in Warsaw and follows a hybrid model with 3 days per week in the office, as well as participation in a 24/7 on-call rotation.
Your tasks
- Investigating and resolving production incidents and application issues within agreed service levels
- Collaborating with Development, Engineering, Infrastructure, SRE, and DevOps teams to ensure stable and reliable application performance
- Monitoring application health, analyzing trends, and identifying opportunities to improve stability, performance, and maintainability
- Implementing and enhancing monitoring, alerting, and observability capabilities across applications and supporting services
- Performing root-cause analysis and contributing to preventive actions for recurring issues
- Maintaining technical documentation and knowledge base articles, and sharing knowledge within the support team
Requirements
- At least 5 years of experience in L2 Application Support or a similar technical production support role, with strong troubleshooting, problem-solving, incident management, and root-cause analysis skills
- Good technical understanding of Java and Spring Boot applications, with knowledge of Kubernetes and containerized environments
- Knowledge of MongoDB and Kafka, including a good understanding of Kafka's role in distributed systems
- Previous experience with cloud environments; experience with Azure, AWS, or GCP is highly preferred
- Experience with monitoring, alerting, and observability, including hands-on experience with at least one platform such as Elastic, Splunk, Dynatrace, or New Relic
- Proactive and reliability-focused mindset, with a strong focus on continuous improvement and the ability to collaborate closely with Development, Engineering, SRE, DevOps, and Infrastructure teams
- Fluency in both Polish and English, and willingness to work in a hybrid model from Warsaw, including participation in a 24/7 on-call rotation
Job no. JOB-EPEJ8
Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.
Benefits For You
- Great Place to Work
- Solid financial situation
- Contracts with the biggest brands
- Centre of internal trainings
- Many experts you can learn from
- Open and accessible management team
- Profit sharing
- Passion Sponsorship program
- Regular integration events and trips
- Comfortable and well-equipped offices
- MySii app
- Medical care
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