Senior JavaScript Engineer

About The Company

ContentPass is an established and profitable leader in the privacy and adtech industry, dedicated to empowering publishers and media houses across Europe with innovative cross-publisher monetization solutions. Our cutting-edge technology handles billions of page impressions every month, facilitating seamless and compliant advertising experiences. We pride ourselves on maintaining a balanced blend of stability and agility, combining the reliability of a profitable enterprise with the dynamic, ownership-driven mindset of a startup.

Our team members have a direct and visible impact on our products and culture, fostering an environment of continuous innovation and collaboration.

About The Role

We are seeking a highly skilled Senior Software Engineer to take ownership of our core SDK, a critical component integrated into partner websites. The SDK manages communication with Consent Management Platforms (CMPs) and our proprietary stack, ensuring privacy compliance, optimal performance, and reliability at scale. As a key contributor, you will be responsible for evolving the SDK into a high-performance, secure, and extensible framework capable of integrating with additional CMPs, unlocking access to premium content models, and potentially detecting and blocking third-party requests, ads, and trackers.

This role is ideal for an engineer passionate about web performance, browser internals, and privacy technology, with a focus on writing elegant, efficient, and secure TypeScript code.

Qualifications

• Minimum of 5+ years of professional software engineering experience.
• Deep expertise in JavaScript/TypeScript and modern web APIs.
• Proven experience debugging complex issues across different browsers and environments.
• Solid understanding of browser networking, cookies, privacy, and security mechanisms.
• Experience developing SDKs, libraries, or embeddable scripts at scale.
• Excellent communication skills, with an ownership mindset and the ability to ship and iterate rapidly.
• A strong desire to understand underlying systems and continuously improve them.
• Proficiency in English, both written and verbal, with the ability to explain technical challenges clearly to peers.

Responsibilities

• Own the design, development, and ongoing evolution of our web SDK used across various publisher integrations.
• Ensure the SDK delivers high performance, reliability, and scalability to support billions of monthly impressions.
• Collaborate closely with engineering and product teams to extend SDK functionality for new CMP integrations and features.
• Debug and resolve complex browser and integration issues across multiple environments and configurations.
• Champion best practices related to security, maintainability, and developer experience.
• Work cross-functionally with engineers and stakeholders to deliver rapid improvements and updates.

Benefits

At ContentPass, we offer a comprehensive benefits package designed to support your professional growth and personal well-being. You will have the opportunity to work in a dynamic environment that values innovation and ownership. Our benefits include competitive salary packages, flexible working hours, opportunities for continuous learning and development, and a collaborative team culture.

We also promote a healthy work-life balance, encouraging our team members to thrive both professionally and personally. Join us to be part of a forward-thinking company where your contributions truly make a difference.

Equal Opportunity

ContentPass is committed to fostering an inclusive and diverse workplace. We believe that embracing different perspectives and backgrounds enhances our innovation and success. We are an equal opportunity employer and do not discriminate based on race, ethnicity, gender, age, sexual orientation, disability, or any other protected characteristic. We encourage all qualified individuals to apply and join our team in shaping the future of privacy and adtech technology.