Senior Backend API Engineer

Summary

Join Xayn, a leading AI startup, as a Senior Backend API Engineer and play a vital role in developing their privacy-first Legal AI solution, Noxtua. You will build and maintain scalable, high-performance backend services using Rust and Python, collaborating with AI researchers and engineers. This position requires strong proficiency in Rust and Python, expertise in backend development, and a solid understanding of system architecture. The role offers flexible working hours, 26 vacation days plus holidays, and 100% remote work possibility (with German residence). Xayn provides equipment like a laptop, second screen, and keyboard, along with discounts on services like Urban Sports Club.

Requirements

• Strong proficiency in Rust and Python, with at least 2 years of Rust experience, including API development (e.g. with Tokio) and applying OpenAPI standards
• Expertise in backend development, including database integration (PostgreSQL), Docker containerization, and security practices like OAuth and secure coding
• Solid understanding of system architecture, with experience in microservices, scalable deployments using Kubernetes, and network architecture fundamentals
• Strong problem-solving and algorithmic skills, with a clean code approach and a focus on performance optimization
• Test-driven development mindset, with proven experience in extending Python projects, ensuring type-safe coding practices, and efficient collaboration within cross-functional teams
• Working Permission: EU
• Language: English (fluent)

Responsibilities

• Develop and maintain scalable backend services using Rust, focusing on the core APIs that handle the heavy lifting for Xayn’s Noxtua platform
• Design, develop, and deploy secure and robust APIs with a focus on scalability, stability, and security for customer-facing services
• Manage Service and Tenant APIs using Python, including tenant creation, administration, and rights management for efficient customer operations
• Integrate AI libraries primarily in Python, implementing features close to LLMs (Large Language Models) and supporting AI-related API development
• Optimize algorithms and system performance to ensure speed, scalability, and overall system reliability across the platform
• Contribute to platform development with a focus on security and stability while designing and deploying new APIs for AI-driven features
• Collaborate with AI Engineers, DevOps, and Frontend Developers to implement solutions effectively and ensure seamless integration across teams

Benefits

• Flexible working hours: Full-time (32-40h/week)
• Vacation: 26 days + December 24th & 31st off
• Remote: 100% remote work possible (given a German residence), other countries upon request
• Discounts: e.g. Urban Sports Club Membership
• Equipment: Laptop (Lenovo or Mac), second screen, keyboard etc