Senior Search Engineer (Rust)

N-iX is looking for Senior Search engineer (Rust) to join the fast-growing team one our projects.

Our client a leading European AI company developing cutting-edge document search and indexing systems for enterprise and AI applications.
Our products combine high-performance technologies, scalability, reliability, and data security, fully aligned with European regulatory and ethical standards.

As a Senior Search Engineer (Rust), you will take ownership of backend services, search and indexing pipelines, API/SDK design, and performance optimization across our document search platform.
This is a senior, hands-on role, designed to be covered by 1-2 FTE split across specialists, ensuring full operational continuity and technical excellence.
You will be working at the core of our Document Index Team, enabling seamless search, retrieval, and processing of large-scale document datasets.  

Responsibilities:

• Develop and maintain backend services in Rust, focusing on performance, reliability, and scalability


• Design, implement, and optimize document search and indexing pipelines using Qdrant and PostgreSQL


• Drive API and SDK design, including lifecycle management (deprecation, sunsetting, adoption)


• Lead complex architecture and data model migrations for evolving systems


• Implement software engineering best practices (TDD, DDD, resiliency patterns)


• Troubleshoot, debug, and resolve performance and reliability issues in production


• Collaborate with Infra team to deploy and manage services on Kubernetes using Helm


• Contribute to CI/CD pipelines and deployment automation (GitLab, GitHub Actions)


• Mentor junior engineers and ensure team knowledge sharing


• Maintain clear documentation for system design, operational workflows, and troubleshooting

Requirements:

• 4+ years of professional backend development experience (including Rust)


• Strong experience with search systems, vector databases (Qdrant or other), and relational databases (PostgreSQL)


• Hands-on experience with Kubernetes and Helm for deploying and scaling services


• Solid understanding of distributed systems, resiliency patterns, and scalable architecture


• Experience in API/SDK design, data modeling, and lifecycle management


• Proficient in CI/CD workflows (GitLab, GitHub Actions) and deployment automation


• Excellent debugging, profiling, and performance tuning skills


• Strong communication skills and ability to work in cross-functional teams


• Ability to independently own and operate services in a shared-responsibility model (1–2 FTE split across specialists)


• English level - at least Upper-Intermediate