Company at a Glance
OpenX is focused on unleashing the full economic potential of digital media companies. We do this by making digital advertising markets and technologies that are designed to deliver optimal value to publishers and advertisers on every ad served across all screens.
At OpenX, we have built a team that is uniquely experienced in designing and operating high-scale ad marketplaces, and we are constantly on the lookout for thoughtful, creative executors who are as fascinated as we are about finding new ways to apply a blend of market design, technical innovation, operational excellence, and empathetic partner service to the frontiers of digital advertising.
We are a pioneer in cloud computing in Poland. With the recent migration to Google Cloud Platform (GCP) we have the largest infrastructure cloud footprint in Poland. It’s on such a large scale, Google is working to solve our problems.
We are seeking a Senior Cloud SRE (Site Reliability Engineer) that will be primarily responsible for the performance, uptime, and growth of various OpenX systems and services on GCP. Much of your software development focuses on optimizing cloud-native systems, orchestrating cloud infrastructure and eliminating manual work through automation.
Excellent communication skills are crucial in this position so you could successfully interact with globally distributed OpenX teams operating in a 24x7 manner.
We are operating at a scale:
100% Cloud-based (GCP) platform
Over 380 billion Ad requests every day
Over 120 000 CPU daily
Over 140 TB RAM daily
Over 1200 production deployments a month
We'd like you to commute to our Krakow office once a week to meet and work with the team.
What we offer:
Employment contract (22 525 - 25 175 PLN gross/monthly) OR B2B (181 - 202 PLN net/hourly)
Working with the newest technologies such as Cloud Computing (GCP)
Challenges at work that are difficult to find anywhere else!
Solving important problems in a scale
Joining a company that is growing and scaling
Flexible working hours & remote work option
Key responsibilites:
Design, write and deliver software to implement and support large web-scale, highly-performant, highly-available infrastructure on GCP (e.g. Terraform)
Monitor infrastructure, respond to incidents, correct and improve systems to prevent incidents, and plan capacity
Support system deployments and product releases
Tune large-scale clusters for optimal performance and efficiency
Work closely with engineering, project management, and operational peers to develop innovative technical tools and solutions
Participation in on-call rotation
What you need to have to be successful:
At least 5 years of GCP experience
Bachelor’s degree in Computer Science, related technical field involving systems engineering, or equivalent practical experience
Experience with Kubernetes/Docker/Containers
Experience with CI/CD
Experience in one of the following: Java, Python, Go, or other
Experience with current AI tools, especially Claude Code and Codex
Good English skills
Desirable Qualifications:
Expertise in designing, analyzing and troubleshooting large-scale distributed systems
Good understanding of public cloud services and tasks, such as: VPC; load balancing; relational and non-relational datastores (e.g., Google Cloud SQL, Memorystore, AWS RDS); storage (e.g., GCS, AWS S3); monitoring (e.g., GCP Stackdriver, AWS CloudWatch, Prometheus); serverless computing (e.g., GCF, AWS Lambda); and auto-scaling
Ability to debug and optimize code and automate routine tasks
Experience with security
Our benefits (on employment contract):
Annual performance bonus
Tax-deductible system due to copyright protection: 75%
Private health care for you and your family (covered by OpenX)
Private life and travel insurance
MultiKafeteria program
Training: access to the LinkedIn learning platform and Tech workshops
Holiday Allowance
Pension scheme (PPK from PZU)
Additional paid day off
Free parking lot
Access to peer to peer recognition platform
Monthly work-from-home allowance and one-time payment when you join us to help you set up your home office
We celebrate team members' important personal milestones (vouchers, gifts)
