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.

We’re seeking a skilled Senior Full Stack Web Developer to take ownership of evolving and enhancing our WordPress-based website. This role is responsible for leading technical implementation across the front end, back end, CMS, and hosting infrastructure as we elevate and modernize our web experience for our customers. This person should be well versed with full stack technologies, experienced in wordpress plugins integration and all analytics/cookies code injection and understand the shifting landscape of how AI is impacting web development.

This person will be a key member of the OpenX marketing team, working for the Digital Marketing manager and working closely with the design team on a day-to-day basis. They will be based in Kraków and be part of the OpenX community in that market.

• Translate the complete website UI/UX based on the design from Figma/Sketch into pixel-perfect, functional, and responsive web pages
• Manage a responsive website for both desktop & mobile
• Implement & manage cookie banners across all web pages
• Bring in new web development practices & learning to deliver a great customer experience
• AI Accessibility - Experience with or interest in leveraging AI tools to improve development efficiency (e.g., GitHub Copilot, Cursor) and enhance user experience (e.g., AI-powered search, content personalization, translation).

• Enhance our website with pages including menu, footer, and sitemap to be managed and updated by the marketing manager for copy and assets
• Manage code injection, analytics, cookies, asset library, etc.
• Take care of any WordPress CMS needs as needed, including upgrades to WordPress, plugins, and custom themes. This includes rigorous testing on a staging environment to prevent production issues.
• Create and maintain clear technical documentation for the website's codebase, architecture, and deployment processes.

• Manage our WP Engine hosting
• Own the website's overall security posture by implementing preventative measures (like vulnerability scanning), monitoring for emerging threats, and defending against malicious traffic and potential exploits
• Manage and verify database backups
• Set up and manage an architecture of a staging environment to version manage the website
• Website Performance Optimization - Continuous optimization of front-end performance to meet Google Core Web Vitals, ensuring fast and smooth performance on all devices

• B2B (81- 95 PLN net/hourly)
• Working with the newest technologies such as Cloud Computing (GCP)
• Challenges at work that are difficult to find anywhere else!
• Joining a company that is growing and scaling
• Flexible working hours & remote work option

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 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 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.

We are all owners of OpenX

We all have a voice to improve OpenX

We stake our personal and professional reputations on the excellence of our work

We are not interested in just "doing our jobs"; we take ownership to drive results

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 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.

Our three traits capture what makes a great team member at OpenX.

Ideal team players are humble and demonstrate integrity. They put the team's success above their own, share credit generously, and value collective achievements. They are self-assured, open to coaching, and committed to continuous learning.

Ideal team players are results-driven and motivated. They are curious, always seeking more to do, learn, and take on. As proactive problem-solvers, they take initiative without needing external motivation. They continuously think about the next steps and opportunities for improvement.

Ideal team players are smart and possess the intellectual acumen to understand the complexities of our organization and industry. They are interpersonally intelligent, good communicators, and exemplify sound judgment in their interactions across the company to foster a collaborative environment.

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.

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