Senior JavaScript Engineer (m/f/d) – Focus on Web Performance & SDK

Content Pass

THE MISSION At contentpass, we are on a mission to save independent journalism and the free web. We believe that privacy is a fundamental right and that quality content deserves to be paid for without selling user data. Our "Pur-Model" enables over 700 publishers to offer their readers a choice: consent to tracking or browse completely ad- and tracking-free for a small monthly fee. YOUR ROLE: THE HEART OF THE PRODUCT At contentpass, we often say that "the OIDC is the product, and the rest is glue." Our OIDC service is the central nervous system of our entire operation. It doesn't just handle logins; it manages the state of every single user interaction, subscription, and access right across hundreds of websites. We are looking for a Senior Backend Engineer who wants to take ownership of this core infrastructure. You won’t just be maintaining a library; you will be architecting the future of how users interact with the paid web. We have a massive roadmap ahead, and you will be the one building the bridge to the next generation of contentpass. WHAT YOU’LL DO * Architect & Scale: Lead the development and scaling of our central OIDC provider. * OIDC Federation: Implement and manage integrations with other OIDCs and Social Logins, allowing for a seamless "login once, browse everywhere" experience. * Extend Subscription Logic: Design and implement complex subscription mapping and entitlement logic that goes far beyond simple "active/inactive" states. * Single-Article Payments: Build the foundation for granular payment models. * Security & Privacy by Design: Ensure that our identity service remains a fortress for user data, strictly adhering to GDPR and the highest security standards. * Collaborate: Work closely with our SDK and Frontend teams to ensure the "glue" connects perfectly to your core service. YOUR PROFILE * Deep OIDC/OAuth2 Expertise: You don’t just use libraries; you understand the underlying protocols, flows (Authorization Code, PKCE, etc.), and security implications. * Backend Mastery: You are a seasoned developer, ideally with strong experience in TypeScript/Node.js. * Identity Experience: You have worked with Identity Providers (IdPs) like Ory Hydra, Keycloak, or Auth0, or have built custom identity solutions from scratch. * Product Mindset: You understand that technical decisions impact the business. You enjoy thinking about how "Identity" can enable new features like micro-payments. * Security First: You have a "security-by-default" mindset and experience with JWTs, encryption, and token management. * Language: Fluency in English (German is a plus, but not required). WHY US? * Impact: You are working on one of the most critical parts of our company. * Flexibility: We are a remote-first company. Work from our beautiful office in Berlin or from your home office anywhere in Europe. * Growth: A high degree of autonomy and the chance to shape the technical roadmap of our core product. * Purpose: Join a team that values privacy, independence, and the future of digital publishing. * Equipment: The hardware you need to do your best work (MacBook, etc.).

ZEAL Network

ZEAL Network SE is a dynamic, international group of companies that has been creating exciting and innovative lottery experiences for over 20 years. As Germany’s largest provider of online lotteries through our brands LOTTO24 and Tipp24, and a trusted partner of Spain’s ONCE, the second-largest national lottery, we’re shaping the future of the lottery industry. We are passionate about driving innovation, as demonstrated by our newest brands, Freiheit+ and Traumhausverlosung, which bring fresh and exciting dreams to life. Additionally, through ZEAL Ventures, we invest in inspiring e-commerce start-ups like Omaze and DAYMADE, fueling fresh ideas and opportunities. We are looking for a (Senior) Full Stack Next.js Developer (f/m/d) to join our team and contribute to building scalable workflows, integrating backend services and defining reusable frontend patterns for a platform used by internal colleagues across multiple markets and business domains. With direct access to users, you will help shape practical solutions together with Product and UX. YOUR TASKS: * Shape and build a modern Next.js application from scratch, creating the technical foundation for a scalable internal platform * Take ownership of frontend topics and drive technical decisions * Work closely with product, design and backend teams in a lean, agile environment * Integrate and evolve RESTful APIs in collaboration with backend engineers * Ensure high-quality implementation of UI/UX designs with a strong focus on performance and scalability * Write and maintain tests to ensure reliability, security and performance * Contribute to deployment, monitoring and overall application stability together with DevOps * Identify and drive improvements in performance, user experience and conversion * Measure, analyze and iterate on product features based on data WHAT YOU OFFER US: * Strong experience as a Senior Full Stack or Frontend Engineer with a focus on modern web technologies * Deep expertise in JavaScript, React and Next.js (App Router, Server Components, Server Functions) * Proficiency in TypeScript, HTML5 and CSS3 * Hands-on experience with tools such as Tailwind CSS, React Hook Form, TanStack Query, Zod, Shadcn/UI or similar (Tailwind CSS is a must have, everything else nice to have) * Ability to write clean, maintainable and performant code and design scalable architectures * Solid experience integrating and working with REST APIs * Experience with testing strategies for frontend applications (nice to have) * Interest in using modern development tools, including AI-assisted workflows, to improve productivity and quality (nice to have) WHAT WE OFFER * State-of-the-art technologies and an agile environment (Check our Tech Radar: https://lotto24.github.io/tech-radar/) * A modern, dynamic culture grounded in the success of a leading-edge e-commerce company. * A talented team of ambitious, like-minded colleagues where your knowledge and ideas truly make an impact. * Ongoing personal growth, supported by an annual development budget of €1,500 to invest in your professional development. * Trust and autonomy, no micromanagement, just confidence in your ability to deliver and excel. * Flexible work options with a hybrid setup focused on results. * Unlimited vacation days in addition to your yearly 30-day vacation allowance. * Opportunity for workations abroad using our WorkFlex tool. * Monthly mobility allowance of €30 to use on the mobility option of your choice (e.g., the Deutschlandticket), plus access to a company bike leasing program. * Company pension scheme, provided in partnership with Degura, to support your future financial security. * Subsidized EGYM WELLPASS membership, with a contribution of only €25 per month, giving you access to a wide range of gyms and sports options across Germany. * Monthly company events, team activities, and informal gatherings, including our popular company-wide lunches provided four days a week. Not ticking every box or think you’ve got that unique set of skills we haven’t realized we need? Get in touch anyway, we’re always looking to add great people!

Voyfai

JOIN VOYFAI, A FAST-GROWING SERIES A STARTUP SHAPING THE FUTURE OF LOGISTICS AND TECHNOLOGY ACROSS EUROPE. Headquartered in Berlin, we operate at the center of a broader group of companies active across several European markets. This is a unique opportunity to take ownership from day one, drive meaningful impact and grow within a dynamic, fast-paced environment. Whether you're shaping processes, building strategies or leading initiatives, your contributions will directly influence the success of Voyfai and the companies we support. If you're passionate about building from scratch and excited to be part of a company on the rise, we'd love to hear from you. YOUR ROLE We are seeking an experienced Senior Software Engineer (m/f/d) to play a key role in building the core infrastructure of our logistics platform. In this role, you will work closely with AI engineers and product stakeholders to define system architecture, integrate with transport management systems, and develop customer-facing features powered by large language models. Your work will be critical in shaping our engineering practices and establishing a scalable foundation for future product development over the next 12 months. KEY RESPONSIBILITIES: * Design and develop scalable software solutions with a strong focus on system architecture and clean code * Build and optimize integrations with transport management systems and third-party logistics platforms * Collaborate with AI engineers to deliver customer-facing features powered by large language models * Improve system reliability, maintainability and scalability by addressing technical debt and evolving the tech stack * Work with PostgreSQL to ensure data consistency, integrity and performance * Leverage cloud platforms such as AWS or GCP to support infrastructure and deployment * Contribute to DevOps and CI/CD practices to improve release speed and operational stability * Occasionally support customers directly, helping translate their needs into product and engineering solutions WHAT YOU BRING: * 5+ years of professional software engineering experience, with strong backend architecture skills and comfort across the full stack * Solid command of JavaScript or TypeScript across both backend and frontend contexts * Experience with SQL databases, preferably PostgreSQL * Hands-on experience deploying and operating applications on cloud platforms like AWS or GCP * Familiarity with DevOps, CI/CD pipelines and modern software development practices * Clear communication skills and the ability to collaborate effectively with technical and non-technical stakeholders * A proactive, ownership-driven mindset suited for fast-paced startup environments WHAT WE OFFER * Competitive salary and equity options * A dynamic, fast-paced work environment with a mission-driven team * Flexible working arrangements (Hybrid) * 30 days of PTO * Regular team events and offsites * Monthly mobility budget via Navit