Description:

OpenX is seeking a Senior Software Engineer III (JavaScript) to join their core exchange development team in Krakow, with a focus on high-performance, distributed, low-latency systems.
The exchange handles billions of ad requests daily, connecting thousands of publishers with demand partners, and operates on a fully containerized cloud platform.
The role involves designing and delivering new features, collaborating with Product and UX teams, and improving the efficiency and stability of servers and processes.
Candidates will work in a fast-paced environment where each millisecond matters, and will be expected to think long-term and simplify complex systems.

Requirements:

Candidates must have 4+ years of experience building SaaS applications using JavaScript/Typescript.
Experience with React is required.
A background in database system design, RDBMs, or NoSQL is necessary.
Familiarity with Google Cloud Platform or Amazon Web Services is a plus.
Experience in digital media, marketing technology, or advertising technology is highly desirable.
Proficiency in both Polish and English is required for effective communication.

The position offers an employment contract with a salary range of 17,000 - 19,000 PLN gross/monthly or a B2B option at 139 - 155 PLN net/hourly.
Employees will receive an annual performance bonus and a tax-deductible system due to copyright protection.
Private health care for employees and their families is provided, along with private life and travel insurance.
Additional benefits include access to a training platform, holiday allowance, pension scheme, and extra paid days off.
Employees will also benefit from a monthly work-from-home allowance, recognition programs, and support for setting up home offices.