Mid Software Engineer II (JavaScript)

**Overview:** - OpenX is a company focused on maximizing the economic potential of digital media companies through digital advertising markets and technologies. - The company operates at a large scale with a cloud-based platform and handles billions of ad requests daily. - OpenX is seeking thoughtful, creative executors for Marketplace Quality roles. **Key Responsibilities:** - Recognize and block non-human traffic. - Detect malware in ads and ensure they meet standards. - Respond quickly to traffic and ad quality issues. - Design high-performance systems and deliver new features. - Collaborate with Product, UX, and Engineering teams. - Improve server and process efficiency. - Drive long-term solutions over temporary fixes. - Work independently to identify and act on areas of improvement. **Requirements/Skills/Qualifications:** - Minimum 2+ years experience with SaaS applications using JavaScript/Typescript and React. - Experience with database systems and cloud platforms (AWS/GCP). - Familiarity with digital media, marketing technology, or advertising technology is beneficial. - Strong Polish and English language skills. - Good communication, teamwork, and problem-solving skills. - Ability to learn and adapt to new systems. **Compensation & Benefits:** - Employment contract: 13,600 - 16,000 PLN gross/monthly. - B2B contract: 115 - 135 PLN net/hourly. - Benefits include annual performance bonus, tax-deductible system, private health care, travel insurance, multi-cafeteria program, LinkedIn learning access, holiday allowance, pension scheme, additional paid day off, free parking, peer recognition platform, and celebration of personal milestones. **OpenX Values and Traits:** - Teamwork, customer centricity, ownership, transparency, and adaptability are core values. - Ideal team members are humble, driven, and smart, demonstrating integrity, initiative, and sound judgment. - OpenX is committed to equal employment opportunities and has a privacy policy for applicants.