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Offer summary
(Summary generated by AI based on the full job description)
The project involves supporting business-critical applications in a high-availability environment with focus on monitoring, root cause analysis, and system stability. Required skills include Java, Spring Boot, Kubernetes, MongoDB, Kafka and experience with monitoring platforms like Elastic, Splunk, Dynatrace. Responsibilities cover incident resolution, collaboration with engineering teams, and observability improvements. Benefits include private healthcare, attractive benefits package, and growth investment.
from: 27 August 2026
to: 26 September 2026
salary not specifiedB2B contract (full-time)
salary not specifiedcontract of employment
Offer parameters
level:senior
working mode:hybrid • full office
Warszawa, Mokotów
Requirements
Expected technologies
Java
Kubernetes
Spring Framework
Optional technologies
Apache Kafka
AWS
Microsoft Azure
Google Cloud Platform
Our 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
Your responsibilities
- 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
About the project
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.
What we offer
- Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
- Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
- We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
- Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
- Comfortable workplace – class A offices or remote work
- Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
- PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
- Investment in your growth – meetups, webinars, training platform and technology blog – you choose
- Fantastic atmosphere created by all Sii Power People
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.Start your adventure with Sii!
Sii Sp. z o.o.
Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.
This is how we work
L2 Application Support Engineer (f/m/x)
I apply to:
Sii Sp. z o.o.
Warszawa, Mokotów
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