Site Reliability Engineer

SIX; Warszawa; On-site; PLN 240,000 - 360,000; Full time

Job summary

SIX in Warszawa is seeking a Site Reliability Engineer (L4) to design, automate, and operate scalable, cloud-native platforms that support critical services. You will partner with development, infrastructure, and security teams to improve reliability, accelerate delivery, and drive automation and AI-powered initiatives.

You will lead incident response, build observability stack, and evolve CI/CD pipelines and GitOps practices using Kubernetes/OpenShift, Docker/Podman, Python, and Bash.

Qualifications

• Bachelor's or Master’s degree in Computer Science, Engineering, or related field.
• 5+ years in SRE/DevOps in cloud-native environments.
• Strong Linux system administration and scripting capabilities.
• Proficient in Python and Java; Scala is a plus.

Responsibilities

• Drive automation and reliability initiatives across infrastructure and apps.
• Design, maintain, and optimize CI/CD pipelines and deployment strategies.
• Manage Kubernetes/OpenShift platforms in production.
• Develop automation and internal tooling using Bash, Python, and Java.
• Lead incident response and root cause analysis.
• Improve observability, performance, and reliability of services.
• Contribute to IaC and GitOps practices.
• Participate in Agile ceremonies and continuous improvement.

Skills

Linux administration

Bash/Shell scripting

Python

Java

Scala

CI/CD

GitOps

Observability

Distributed systems

Education

Bachelor’s or Master’s degree in Computer Science, Engineering, or related field

Tools

Docker

Podman

Kubernetes

OpenShift

GitLab CI/CD

ArgoCD

Helm

Ansible

Kafka

Job description

Do you thrive in highly dynamic, fast-paced environments where reliability, automation, and innovation are at the core of engineering culture? We are looking for a talented Site Reliability Engineer (L4) to join our SRE & Platform Engineering team.

In this role, you will help design, automate, and operate scalable, resilient, and cloud-native platforms supporting critical business services. You will work closely with development, infrastructure, and security teams to improve system reliability, accelerate delivery pipelines, and drive operational excellence through automation and AI-driven initiatives.

At our company, we strongly encourage innovation, ownership, and continuous learning. Engineers are empowered to propose and implement new ideas, experiment with automation and AI technologies, and continuously expand their skills through access to modern training platforms, certifications, and learning resources.

What You Will Do

• Drive automation and reliability initiatives across infrastructure and application platforms to reduce operational overhead and improve system resilience.
• Design, maintain, and optimize CI/CD pipelines and deployment strategies for secure, scalable, and efficient software delivery.
• Manage and improve Kubernetes/OpenShift-based container platforms in production environments.
• Develop automation solutions and internal tooling using Bash/Shell scripting, Python, and Java (Scala experience is a strong plus).
• Partner with development teams to improve observability, performance, scalability, and operational readiness of services.
• Lead incident response activities, perform root cause analysis, and implement preventive measures to improve platform stability.
• Build and maintain monitoring, alerting, and logging solutions to ensure high availability and operational visibility.
• Contribute to infrastructure-as-code and GitOps practices using modern DevOps and cloud-native tooling.
• Participate actively in Agile/Scrum ceremonies and contribute to continuous improvement initiatives within the engineering organization.
• Explore and adopt AI-powered operational tooling and automation opportunities to improve engineering efficiency and reliability.

What You Bring

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related technical field.
• 5+ years of experience in Site Reliability Engineering, DevOps, or Platform Engineering roles within modern containerized/cloud-native environments.
• Strong Linux system administration expertise with advanced Bash/Shell scripting skills.
• Strong programming experience in Python, experience with Java is required, and Scala knowledge is considered a strong advantage.
• Hands-on experience with container and orchestration technologies including Docker, Podman, Kubernetes, and OpenShift.
• Strong understanding of CI/CD, GitOps, and infrastructure automation practices.
• Experience with tools and technologies such as GitLab CI/CD, ArgoCD, Helm, Ansible, Kafka, and observability/monitoring platforms.
• Solid troubleshooting and problem-solving skills in complex distributed systems environments.
• Experience with production incident management, root cause analysis, and reliability engineering practices.
• Excellent communication skills in English, with the ability to collaborate effectively across global teams.

What We Offer

• Opportunity to work on large-scale, modern cloud-native platforms and infrastructure.
• A strong engineering culture focused on automation, innovation, reliability, and continuous improvement.
• Freedom to introduce new ideas, tools, and AI-driven solutions that improve operations and developer experience.
• Access to professional training platforms, technical certifications, conferences, and continuous learning resources.
• Collaborative international environment with experienced engineers and modern technologies.
• Competitive compensation and career growth opportunities within a rapidly evolving engineering.