Senior or Expert Systems Engineer (Rust/C++)

Location: Belgrade, Berlin, or London

Company

Perplexity builds next-generation search products and technologies.

What you will do

• Design and build core search engine components, including indexing pipelines, retrieval algorithms, and ranking systems for billions of pages.
• Develop streaming and batch data processing systems for search index construction in a high-load environment.
• Optimize hardware performance through low-level systems tuning and efficient implementation.
• Solve multithreading, concurrency, and system-level optimization challenges.
• Own the full lifecycle of systems from architecture and implementation through deployment, operation, and scaling in production.

Requirements

• 3+ years of hands-on systems programming experience with Rust, C++, C, or similar languages.
• Strong knowledge of algorithms, data structures, multithreading, concurrency, and systems-level trade-offs.
• Experience building high-load, distributed, and hardware-adjacent services.
• Solid understanding of Linux internals, including syscalls, networking, memory models, and kernel tuning.
• Familiarity with low-level optimization techniques such as memory management, cache efficiency, SIMD, and profiling.
• Knowledge of Python or another scripting language.

Nice to have

• Experience developing search engine, database, or information retrieval components.
• Understanding of indexing, query parsing, ranking, and relevance.
• Experience with trading systems or other latency-sensitive real-time systems.
• Familiarity with cloud services, Kubernetes, and AWS infrastructure.

Culture & Benefits

• Full-time role within the Search Core department.
• Focus on clean, efficient, scalable systems-level code.
• Work on foundational components for next-generation search products.