Software Engineer III (JavaScript)

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, web page, maybe TV in the future. That’s the place where each millisecond matters. Recognize non-human traffic and block it to reduce the cost of our infrastructure and to not overload our demand-side partners, detect malware in ads, check if they meet standards and keep websites and visitors safe, provide a response in a few milliseconds if the quality of traffic and ads is good for 380 billions of requests per day.

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 50 PB of data per week Over 1200 production deployments a month

What we offer

Employment contract (17 708 - 19 792 PLN gross/monthly) OR B2B (147 - 164 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 Team work collaboration

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)