Senior / Staff Full-Stack Engineer (Node.js / Next.js)

Location: Germany
Team: White-label Platform
Working Arrangement: Open to remote & onsite

About the Role

We are building a next-generation white-label platform that enables partners to seamlessly integrate and distribute ExpressVPN’s services within their own ecosystems. As a Senior / Staff Full-Stack Engineer, you will play a key role in designing and delivering a scalable, secure, and intuitive developer and tenant experience.

You will own end-to-end development of critical platform features—from backend services to frontend interfaces—powering a Stripe-like management console for our B2B partners.

What You’ll Do

• Design, build, and maintain the Developer / Tenant Console — a Stripe-style management interface for B2B partners
• Develop and manage authentication endpoint configuration flows, enabling partners to register and maintain their own OIDC / OAuth2 identity providers
• Build subscription and entitlement services, including endpoints consumed by SDKs for real-time user access and feature control
• Create statistics and KPI dashboards, providing tenants with visibility into usage metrics, active connections, MAU, and platform health
• Implement billing and usage visibility, including usage-based billing summaries, invoice history, and per-tenant consumption breakdowns
• Own full-stack delivery of features, from API design and backend services (Node.js) to frontend implementation (Next.js / React)
• Collaborate closely with platform, SDK, and infrastructure teams to ensure seamless integration and scalability
• Drive best practices in system design, performance, security, and developer experience
• (Staff level) Provide technical leadership, mentor engineers, and influence architectural decisions across the platform 

What We’re Looking For

• Strong experience with Node.js and Next.js/React
• Proven ability to own full-stack features end-to-end (API design, integration, frontend architecture, state management)
• Experience building B2B platforms, developer portals, or admin/tenant dashboards
• Solid understanding of authentication and authorization protocols (OIDC, OAuth2)
• Experience designing scalable APIs and backend services
• Familiarity with data visualization libraries (e.g., Recharts, Chart.js) for dashboards and reporting
• Conduct code reviews and ensure high code quality through automated testing
• Contribute to engineering best practices (testing, code quality, documentation)

Nice to Have

• Experience with multi-tenant architectures and SaaS platforms
• Exposure to usage-based billing systems or subscription platforms
• Experience working on security-focused products or privacy-centric applications

How we’ll support you

We believe in fostering an environment that empowers decision-making at all levels. Our culture is rooted in the inverted pyramid approach, where the engineers, who have a deep understanding of the product and the customers, are the ones who have the knowledge and the authority to make impactful decisions. 

• We prioritize treating every team member with respect and promote open and constructive feedback, ensuring a culture of trust and transparency
• We encourage learning through experimentation and provide a safe space for everyone to learn from their experiences
• Our managers are dedicated to facilitating career growth and creating an environment that attracts and supports talented engineers

ExpressVPN, a Kape Technologies company, is an equal opportunity employer. We promote equal recruitment and employment opportunities, and do not discriminate based on gender identity and/or expression, age, race, color, disability, culture, religion or belief, family and/or marital status, sexual orientation, or other characteristics protected by applicable law. We celebrate a diverse and inclusive work environment in which applicants and employees are treated with respect and dignity, and excel based on personal merit, qualifications, experience, and performance.  

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Before you apply

• At the moment, we do not sponsor visas in the EU. For Hong Kong, we require at least two years of working experience and a university degree in a related field. For Singapore and the UK, we can only sponsor visas for mid-career or above.
• Please upload your resume as a PDF and do not include any salary or compensation information in it.

ExpressVPN is one of the world’s leading providers of online privacy and security services for consumers. Started in 2009, we’ve grown to have millions of active paying customers, a team of more than 700 people worldwide, and a brand recognized by hundreds of millions of people in 18 languages and more than a hundred countries. We see huge growth in our industry, and are gaining market share through strong execution.