Staff/Principal Platform Engineer - Kape Partner Portal
External
Expressvpn · AachenPrepare for this interview
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Responsibilities
- Own end-to-end architecture of the Kape Partner Portal - backend services in Rust, the Next.js frontend, and everything in between
- Design and evolve the multi-tenant control plane
- Lead AI-assisted development with Claude Code - designing prompts and workflows, orchestrating sub-agents, reviewing and validating generated output, and shaping how the team uses AI to ship faster without sacrificing quality
- Make pragmatic technology choices across the full stack (Rust, Next.js, PostgreSQL, Redis) and across infrastructure (AWS, ideally with Terraform/Scalr)
- Define and own observability, reliability, and security standards (Prometheus, Grafana, structured logging, alerting)
- Design clean, well-documented REST APIs for internal services and partner integrations
- Partner closely with product, business, and customer-facing teams - including running technical sessions and presentations directly with enterprise customers
- Establish and uphold high engineering standards through code reviews, testing practices, and clear documentation
Requirements
- Proven experience architecting scalable, multi-tenant B2B systems end-to-end, ideally in a SaaS context where you've bridged engineering and business needs
- Comfort working across the full stack - backend, frontend, databases, caching - with a clear mental model of how the pieces fit together. We use Rust (backend) and Next.js (frontend), but transferable cross-stack experience is what matters most
- A modern view on AI-assisted engineering. Experience orchestrating, guiding, and supervising AI agents (Claude Code or similar) to deliver production-grade systems is more important to us than years of hands-on Rust experience . The ability to direct AI well is the leverage point of this role
- Strong system design fundamentals: distributed systems, concurrency, performance trade-offs, reliability
- Solid understanding of REST API design, database modeling, and caching strategies
- Excellent communication skills - equally comfortable in deep technical reviews and in front of enterprise customers
- High degree of ownership and the ability to operate independently with minimal direction
- Experience with Terraform / Scalr in an AWS environment
- Hands-on experience with Prometheus and Grafana
- Background in identity, authentication, secure networking, or VPN platforms
- Experience designing or shipping SDKs and cross-platform libraries
Benefits
Additional Information
Employment Type: Full Time Location: Germany We're looking for a Staff/Principal Platform Engineer to lead the design and evolution of the Kape Partner Portal - our B2B platform that lets partners license our services and integrate our SDKs into their own products. This is a high-ownership, cross-stack role: you'll shape architecture end-to-end across backend and frontend, while leading AI-assisted engineering at scale. You'll own the technical direction of a multi-tenant platform covering partner onboarding, entitlements, SDK licensing, configuration management, and operational visibility. The role suits someone who thinks in systems, communicates clearly with both engineers and business stakeholders, and is excited about driving AI-orchestrated engineering workflows rather than maintaining legacy patterns.
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