Staff Software Engineer (Agentic Search) - Runtime

NebiusAmsterdamRemoteFull-time3 weeks ago

Nebius is seeking a Staff Software Engineer to build and operate low-latency, high-throughput runtime systems for an agent-native search platform serving AI agents. The role requires 8+ years of backend engineering experience with strong C++ or Rust expertise in high-load, user-facing services. The position is remote and based in Amsterdam, Netherlands.

What you'll do

Design, implement, and operate core runtime services for serving search queries at scale
Build and optimise request flows, including query processing, retrieval orchestration, and response assembly under strict latency budgets
Develop systems that maintain performance and predictability under high load
Optimise CPU, memory, and data access patterns in performance-critical paths
Ensure reliability, observability, and predictability across production services
Build well-tested systems with clear responsibilities and interaction contracts, while remaining flexible as architecture evolves
Define and implement observability primitives, including structured logs, metrics, traces, and latency breakdowns
Monitor throughput, latency, and resource usage, and drive improvements in performance and cost efficiency
Collaborate with indexing and ML teams to integrate retrieval and ranking components, keeping ML logic decoupled from core system internals
Support experimentation and iteration through controlled rollouts and rigorous benchmarking

What you need

Must-have

C++RustBackend systemsHigh-load systemsLow-latency systemsPerformance optimizationObservabilityStructured logging

Nice-to-have

DBMS internalsCloud infrastructureHigh-load web applicationsLarge-scale APIsReal-time data pipelinesLow-level performance tuningHardware-level optimizationOpen-source contributions

Soft skills

CollaborationCommunicationPragmatic tradeoffsEnd-to-end thinkingCross-functional collaboration

Staff Software EngineerAgentic SearchRuntimeC++RustLow-latencyHigh-throughputAICloud InfrastructureRemote

/What you'll do

/What you need

Must-have

Nice-to-have

Soft skills

What you'll do

What you need