greenhouse
Senior Software Engineer - Search Runtime
Nebius
London, GBR
Full-time
Senior · 5+ years experience
Onsite
Discovered 2 weeks ago
C++Rustdistributed systemslow-latency
Free
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C++Rustdistributed systems
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C++Rustdistributed systemslow-latency
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The Role
We are looking for a Senior Software Engineer to work on the runtime systems of a novel search engine tailored for agentic AI consumption. In this role, you will focus on building low-latency, high-throughput systems that serve search queries in real time. You will work on the critical path of user-facing requests, where performance, predictability, and efficiency directly impact product quality. You will design and operate systems that handle thousands of requests per second under strict latency budgets, optimizing every layer from request handling to data access and response assembly.
In this position, your responsibility will be to
- Design, implement, and operate core runtime services for serving search queries
- Build and optimize request flows (query processing, retrieval orchestration, response assembly)
- Develop systems that meet strict latency budgets under high load
- Optimize CPU, memory, and data access patterns in performance-critical paths
- Ensure reliability, observability, and predictability in production
- Build well-tested systems with clear boundaries while allowing architectural evolution
- Define observability primitives (logs, metrics, traces, latency breakdowns)
- Monitor and improve latency, throughput, and cost efficiency
- Collaborate with indexing and ML teams to integrate retrieval and ranking components
- Support experimentation through controlled rollouts and benchmarking
You may be a good fit if you
Have 5+ years of experience building production backend systems
Have strong expertise in C++ or Rust
Have experience with high-load, low-latency user-facing systems
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