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Senior Site Reliability Engineer

https://www.citi.com/ Logo

Citi

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Location:
Poland , Warsaw

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

Are you a talented Site Reliability Engineer with a passion for software development and building resilient, large-scale systems? Do you have a passion for building cutting-edge enterprise products and a hands-on approach to engineering? Join Citi's Production Operation - Continuous Improvement team and be part of our commitment to transform Citi technology, leveraging game-changing capabilities to drive agility, efficiency, and innovation.

Job Responsibility:

  • Design for Reliability: Design, build, and maintain scalable, secure, and highly available infrastructure, using both off-the-shelf and home-grown tooling for a holistic monitoring/observability of the Production Operations services ecosystem
  • Innovate and Automate: Develop tools, scripts, and software in Java and/or Python to automate manual operational tasks (toil reduction), improving efficiency and system reliability for yourself and your developer counterparts
  • Proactive Improvement: Audit existing applications and services for weak points, propose reliability improvements, and drive the implementation of long-term solutions through code and configuration
  • Champion Observability: Implement comprehensive monitoring, alerting, and logging systems to ensure service health and performance visibility. Define, track, and manage Service Level Indicators (SLIs) and Service Level Objectives (SLOs)

Requirements:

  • Preferably 5+ years of experience in SRE, DevOps, or Software Engineering, with demonstrated expertise in handling production systems
  • Strong hands-on Java development experience (Java 17/Spring Boot 3.x)
  • Experience implementing secure REST services/microservices
  • Strong coding skills in other languages like Python, Go is highly preferred
  • Deep knowledge of cloud platforms (AWS, GCP, Azure), Kubernetes, containerization, and Infrastructure as Code (IaC) tools like Terraform
  • Experience with databases (MongoDB, SQL and Oracle/OraaS)
  • Experience with centralized logging, analytics and system monitoring solutions
  • Proven ability to diagnose and fix complex, distributed system failures
  • Experience with Security - OAuth 2.0 and OpenID Connect with JWT Bearer Tokens and X509 Cert Security for Java applications and command line tools
  • Agile Development: Thrive in an Agile environment, actively participating in sprints, backlog grooming, and continuous improvement efforts
  • Bachelor's degree/University degree or equivalent experience
  • Master's degree preferred

Nice to have:

  • General Networking Experience: IP Address Subnetting, DNS, Firewall Theory
  • General Cloud & Containerization Experience: Google, AWS, OSE
  • General understanding of the Schedulers & Batch
  • General understanding of Mainframe environment
  • Basics of Ansible/AAP Playbooks creation
What we offer:
  • Private Medical Care Program
  • Life Insurance Program
  • Pension Plan contribution (PPE Program)
  • Employee Assistance Program
  • Paid Parental Leave Program (maternity and paternity leave)
  • Sport Card
  • Holidays Allowance
  • Sport and team recreation activities
  • Special offers and discounts for employees
  • Access to an array of learning and development resources
  • A discretional annual performance related bonus
  • A chance to make a difference with various affinity networks and charity initiatives

Additional Information:

Job Posted:
February 20, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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