Senior Cloud SRE - Security at OpenX
Krakow, PL

OpenX, a leading provider of digital and mobile advertising technology, seeks a Senior Cloud SRE (Site Reliability Engineering) to focus on Security. OpenX serves well over 100 billion ad requests per day and operates worldwide. As of July-August of 2019, OpenX has moved all its workloads into Google Cloud Platform (GCP). You will be primarily responsible for the security of various OpenX systems and services on GCP. Experience operating software at large web scale is desirable, though we are willing to train people with the right skills and attitude.


Similar to Google’s approach to SRE, you should adhere to the engineering discipline that combines software and systems engineering to build and run large-scale, massively distributed, fault-tolerant systems. Much of your software development focuses on securing cloud-native systems, cloud infrastructure and eliminating manual security work through automation.

The ideal candidate has extensive experience with software engineering practices, building and supporting on-demand, burstable, virtualized and cloud-native environments on major public cloud providers (GCP preferred but AWS is also fine) with a strong focus on security. Excellent communication skills are required in order to successfully interact with globally distributed OpenX teams operating in a 24x7x365 manner. Securing our platform presents many interesting technical challenges. We especially desire candidates with a deep passion for learning and willing to dive deep into issues and challenges as they arise.

You will be primarily responsible for the security of various OpenX systems and services on GCP. Much of your software development focuses on securing cloud-native systems and infrastructure as well as helping other teams do the same.

Key Responsibilities

    • Define and implement security practices at the infrastructure level
    • Work with software development teams to help them secure their products and services
    • Develop software and scripts that automate manual security processes
    • Design, write and deliver software to secure and support large web-scale, highly-performant, highly-available infrastructure on GCP
    • Monitor infrastructure, respond to security incidents, correct and improve systems to prevent security incidents
    • Support system deployments and product releases
    • Working closely with engineering, project management, and operational peers to develop innovative security tools and solutions
    • Participation in on-call rotation



The Security team is a focused group of individuals that are responsible for security across all our products and our corporate IT services. They work closely with the architecture, infrastructure, and product teams to ensure that the products we offer are secure and the data we store is protected. At OpenX, the goal of the security team is to enable other teams to do what they do securely, not to be seen as a roadblock.


OpenX uses a variety of tools. When we moved to GCP we made the decision to manage all our infrastructure as code, using Terraform. The services themselves are written in languages like Java, Elixir/Erlang, Python, Javascript and more. Most of our applications have been containerized and run on Kubernetes. We’re doing some interesting things and we’d love to talk to you about it.

The Skillset And Experience

    • 5+ years of experience working with large web-scale systems (Kubernetes, Docker/Containers)
    • Experience in one or more of the following: Java, Python, Go, Perl, Ruby or shell scripting
    • Expertise in designing, analyzing and securing large-scale distributed systems
    • Good understanding of public cloud services and tasks, such as: Identity and Access Management, 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., Cloud Functions, AWS Lambda); and auto-scaling
    • Experience working on securing cloud environments
    • Experience in application security, cryptography, network security
    • Ability to debug and optimize code and automate routine tasks
    • Bachelor’s degree in Computer Science, or related technical field involving systems engineering, or equivalent practical experience
    • General understanding of GDPR and other privacy laws
    • Good English skills


What We Offer

    • Free catered lunches every Monday, Wednesday and Friday
    • Extra days off
    • Travel allowance
    • Private medical healthcare for you and your relatives
    • Life insurance
    • Multicafeteria
    • Standing desks - all desks at our office are adjustable
    • Snacks & Drinks (healthy options available)
    • SocialX Club
    • Great opportunities to work with your local team as well as with the teams in the US
    • New modern office close to the City Center


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.

OpenX Values

Our five company values form a solid bedrock serving to define us as a group and guide the company. Our values remind us that how we do things often matters as much as what we do.

We are one

One team. No exceptions. We are a group of strong and diverse individuals unified by a clear common purpose.

Our customers define us

We know our business flourishes or dies because of our customers.

OpenX is mine

We are all owners of OpenX. We stake our personal and professional reputations on the excellence of our work.

We are an open book

We are eager to teach and share what we know with others.

We evolve fast

We take risks and confront failure openly. We recognize and repeat success aggressively. We actively seek out and provide constructive criticism. Defensiveness is for weaklings!

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