logo inner

Mid JavaScript Engineer III

OpenXKrakow, PolandRemote, Onsite
This job is no longer open

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.We are operating at a scale:100% Cloud-based (GCP) platformOver 400 billion Ad requests every dayOver 120 000 CPU dailyOver 140 TB RAM dailyOver 50 PB of data per weekOver 1200 production deployments a monthYou will be working on Marketplace Quality (Traffic Quality and Ad Quality).

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 80 billions of requests per day.

What we offer:


  • Employment contract (17 000 - 20 000 PLN gross/monthly) OR B2B (139 - 164 PLN net/hourly)
  • Working with the newest technologies such as Cloud Computing (GCP)
  • Experienced Team (50% of the company are senior developers!)
  • 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 (including Node.js)
  • Experience with databases system design, RDBMs, or NoSQL
  • Excellent written and spoken English skills
  • Experience with Amazon Web Services or Google Cloud Platform - 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
  • Good sense of humor
  • 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 (Covid insurance included)
  • 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)

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


We are one team. There are no exceptions. We are a group of strong and diverse individuals unified by a shared mission. We embrace challenges and win together as a team. We respect and care about our colleagues and cultivate an inclusive culture

WE ARE CUSTOMER CENTRIC


We innovate on behalf of our customers. We understand, respect, and listen carefully to our customers. We build great products to solve our customers’ problems. We manage our customers’ expectations clearly and honestly. We are a trusted partner to all of our customers - we act with integrity at all times. We care.

OPENX IS OURS


We are all owners of OpenXWe all have a voice to improve OpenXWe stake our personal and professional reputations on the excellence of our workWe are not interested in just "doing our jobs"; we take ownership to drive results

WE ARE AN OPEN BOOK


We understand and respect what each of us does. We are eager to teach and share what we know with others, both internally and externally. We are eager to learn from others and we ask questions internally and externally. 

WE EVOLVE FAST


We take responsible risks and own and learn from our mistakes. We recognize and repeat success. We actively seek out and provide constructive feedback. We adapt quickly and embrace change. We tackle growth and learning with real urgency. We are endlessly curious.

OpenX is committed to equal employment opportunities.


It is a fundamental principle at OpenX not to discriminate against employees or applicants for employment on any legally-recognized basis including, but not limited to: age, race, creed, color, religion, national origin, sexual orientation, sex, disability, predisposing genetic characteristics, genetic information, military or veteran status, marital status, gender identity/transgender status, pregnancy, childbirth or related medical condition, and other protected characteristic as established by law.

OpenX Applicant Privacy Policy


Applicants can review our Applicant Privacy Policy at any time by visiting the following link: https://www.openx.com/privacy-center/applicant-privacy-policy/.

Effective Date: April 18, 2024


Apply for this job

This job is no longer open

Life at OpenX

At OpenX, we solve a fundamental issue for brands: how to reach consumers, at scale, in a fragmented media environment. We power highly relevant advertising, delivering quality and value to consumers, publishers and marketers across every type of connected screen and ad format globally. \n\nWe have built a team that is uniquely experienced in designing and operating high-scale programmatic ad marketplaces, and we are constantly looking for thoughtful, creative innovators who are as fascinated as we are about solving big problems with a dynamic and diverse team doing the best work of our careers.\n\nFor more information, please visit www.openx.com
Thrive Here & What We Value1. OpenX values fair and equitable compensation practices.2. Salary ranges vary based on location: $160,000-185,000 (NY/NJ/CA/CO) + bonus + equity + benefits; $75,000-88,000 (NY/NJ/CA/CO); $23-$27 per hour.3. Candidate compensation determined by experience, skills, certifications.4. Benefits include medical, dental, vision, 401k, equity.5. Company culture: Fun, dynamic and high-performing Finance team.6. Flexible schedule with occasional extended/flexible shifts during critical periods.7. Employment opportunities available through December 2024.
Your tracker settings

We use cookies and similar methods to recognize visitors and remember their preferences. We also use them to measure ad campaign effectiveness, target ads and analyze site traffic. To learn more about these methods, including how to disable them, view our Cookie Policy or Privacy Policy.

By tapping `Accept`, you consent to the use of these methods by us and third parties. You can always change your tracker preferences by visiting our Cookie Policy.

logo innerThatStartupJob
Discover the best startup and their job positions, all in one place.
Copyright © 2024