Senior / Staff Rust Engineer (Backend) - Whitelabel

Senior/Staff Rust Engineer (Backend) - White-label 

Team: B2B White-Label VPN Platform

Location: Übach-Palenberg / Onsite

About the Role

As a Senior/Staff Rust Engineer, you’ll join a cross-functional team at a leading VPN provider trusted by millions worldwide. You’ll help build a next-generation white-label VPN platform, shaping the backend control plane and evolving our core SDK for enterprise integrations.

For us, Rust is not an experiment, but a strategic cornerstone technology for building robust, secure, and high-performance systems. In this role, you’ll not only help shape our technical transition to Rust, but also actively contribute to architecture decisions and long-term technology direction.

What you’ll Do:

• Design and build backend microservices powering the platform control plane: Tenant management (multi-tenant architecture); Entitlements; Authentication broker and identity flows
• Extend and maintain the Kape SDK core, ensuring performance, safety, and cross-platform compatibility
• Develop and operate REST/gRPC APIs for internal and external platform integrations
• Drive architectural decisions and select appropriate libraries/frameworks (e.g., Tokio, Actix) for scalability, observability, and performance
• Collaborate closely with DevOps, QA, and Architecture teams
• Conduct code reviews and ensure high code quality through automated testing
• Contribute to engineering best practices (testing, code quality, documentation)

What you’ll bring:

• Solid experience with Rust, including asynchronous programming (Tokio or async-std)
• Experience with microservice architecture and REST/gRPC APIs
• Proficient in Git and comfortable working with build tools and CI/CD pipelines
• Familiarity with system architecture, memory management, and low-level programming
• Proficiency in object-oriented principles within Rust (traits, generics, dyn vs impl)
• Strong understanding of lifetimes and the borrow checker
• Solid English communication skills, both written and spoken (team language)

Nice-to-have:

• Familiarity with UniFFI or cross-platform library design is a plus
• Familiarity with security topics (e.g., memory safety, sandboxing, secure coding practices)
• Knowledge of WebAssembly, embedded development, or blockchain technologies
• Experience working on multi-tenant (B2B SaaS) platforms

What We Offer:

• Work with a modern tech stack in a strong engineering culture
• Influence on technical decisions and room to innovate
• Continuous learning opportunities and support for professional development
• A motivated, collaborative team with flat hierarchies’
• A strategic role with real technical influence and ownership
• A modern engineering culture with CI/CD, observability, and a strong code review culture
• Purpose-driven work: we value security, quality, and depth over quick hacks

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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