Software Engineer III (JavaScript) - OpenX

Job Title: Software Engineer III (JavaScript)
Job Location: Krakow
Job Listing URL: https://jobs.lever.co/openx/39c55567-ad1a-46de-a905-dc3c5f9ae195
Job Description: 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.

You will be part of the core exchange development team. Our exchange handles billions of ad requests daily connecting thousands of publishers with demand partners. It’s fully containerized running in the cloud in multiple regions across the world. Ads from our systems can be seen in your favored mobile game, or web page. That’s the place where each millisecond matters.

We are operating at a scale:
100% Cloud-based (GCP) platform
Over 370 billion Ad requests every day
Over 120 000 CPU daily
Over 140 TB RAM daily
Over 50 PB of data per week
Over 1200 production deployments a month
What we offer:
Employment contract (17 000 - 19 000 PLN gross/monthly) OR B2B (139 - 155 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 responsibilities:
Design high-performance, distributed, low-latency systems
Architect, create, and deliver new features and functionality
Work with Product to drive the requirements, and own the project end-to-end
Work with Product and UX teams to bring consumer-grade user experience and design to the enterprise
Work with Engineering and Product teams distributed across multiple locations
Analyze and improve efficiency, scalability, and stability of servers and processes
Think long-term and be unsatisfied with band-aids
Identify unnecessary complexity and remove it
Required Qualifications:
4+ years experience with building SaaS applications using JavaScript/Typescript
Experience with React and Node.js
Experience with database system design, RDBMs, or NoSQL
Experience with Google Cloud Platform or Amazon Web Services - nice to have
Experience working in digital media, marketing technology, or advertising technology is a big plus
Communicative Polish and English
Desired Characteristics:
Good written & oral communication skills, excellence
Team player
Self-starter with the ability to independently identify and act on areas of improvement
Ability to rapidly learn and understand new systems
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)