Senior Site Reliability Engineer

Job Description
Senior Site Reliability Engineer

Bucharest, Romania

This is Worldline.
Worldline helps businesses of all shapes and sizes to accelerate their growth journey - quickly, simply, and securely. We are the innovators at the heart of the payments technology industry, shaping how the world pays and gets paid. Our technology powers the growth of millions of businesses across 5 continents. And just as we help our customers accelerate their business, we are committed to helping our people accelerate their careers. Together, we shape the evolution.

The O
pportunity
Worldline is a global leader in the fintech market with over three decades of experience. We are transitioning into a new era of payments, providing hardware, software, and services designed to help merchants grow their businesses. Cloud Services (CLS) teams are responsible for keeping our critical infrastructure reliable, secure, and scalable.

We are now looking for SREs who are passionate about service reliability, automation, and resilience, and want to drive innovation in quality and chaos engineering.

Day-to-Day Responsibilities
As an SRE, you will build, automate, and scale the core infrastructure that keeps Worldline's services reliable and secure. But more than that — you will challenge the system with chaos and failure testing to make sure we're ready for anything and you will:

• Automate everything — from infrastructure to deployments, focusing on self-healing systems and zero-touch support.
• Develop and Run chaos / failure tests to help SRE teams find weaknesses before they become incidents.
• Improve service reliability, availability, and scalability through engineering and automation.
• Develop shared tools and platforms for all teams to use (CI/CD pipelines, monitoring, failover mechanisms).
• Partner with SRE and development teams in CLS to define and measure service quality (SLI/SLOs).
• Secure our platforms following top security and compliance standards
• Document what you build so others can easily adopt and improve it.

Who Are We Looking For
We look for big thinkers. People who can drive positive change, step up and show what's next – people with passion, can-do attitude and a hunger to learn and grow. In practice this means:

• 5+ years of experience in SRE, Quality Engineering, or Infrastructure Architecture
• Bachelor or University degree, preferably in an Applied Computer Science discipline
• Linux (Red Hat/CentOS) in High Availability (HA) setups
• Infrastructure as Code (IaC): Ansible, Puppet, Terraform
• CI/CD pipelines and version control: Git, GitLab, Bitbucket
• Scripting and programming: Python, Go, Bash, Ruby
• Automation-first approach to infrastructure and operations
• Networking fundamentals: DNS, Load Balancing, BGP, IP
• Security and compliance: PCI-DSS, Cloud security
• Experience with hybrid infrastructure: On-Prem + Cloud
• Deep knowledge of system reliability, fault tolerance, and distributed systems design
• Experience with cloud infrastructure providers: AWS, Azure, GCP
• Monitoring tools expertise: Prometheus, Grafana
• Incident management tools: PagerDuty, JIRA, Slack
• Hands-on experience running Chaos Engineering or Resilience Programs at scale
• Experience working in regulatory, audit, or compliance environments (DORA, PCI-DSS, ISO)
• Strong grasp of security concepts and best practices
• Passion for service and customer centricity
• Proven leadership in running large-scale reliability initiatives
• Strong influence and leadership capabilities within a matrix organization
• Encourages change, continuous improvement, and enjoys working in a growing and fast-paced environment
• Creative, innovative, and capable of inspiring diverse teams towards common objectives
• Quick to integrate into new organizations; intercultural communication skills are an asset
• Open-minded with a focus on long-term objectives and strategic planning
• Independent worker, comfortable making decisions
• Strives for zero support solutions and self-healing systems
• Security-minded, balancing stability vs. agility, proactive vs. reactive work

Perks & Benefits
At Worldline you'll get the chance to be at the heart of the global payments technology industry and shape how the world pays and gets paid. On top of that, you will also:

• Hybrid Working Policy - 4 days/month in the office
• Gift vouchers on the occasion of Christmas/Easter Holidays
• Private medical services
• 21 vacation days/year
• Referral bonuses for new hires recommended by you
• WFH & Flexible Working Hours
• Full access to the "Learning" platform

Shape the evolution.
We are pushing towards the next frontiers of payments technology, and we look for big thinkers to join our journey. People with passion, can-do attitude and a hunger to learn and grow. Here you'll work with ambitious colleagues from around the world, take on unique challenges as a team, and make a real impact on the society. And with our empowering culture, strong technology and extensive training opportunities, we help you accelerate your career. Wherever you decide to go. Join our global team of over 18,000 innovators across 40+ countries, and shape a tomorrow that is yours to own.

Learn more about life at Worldline at

We are proud to be an Equal Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as an individual with a disability, or any applicable legally protected characteristics.