Quant Developer (Low-Latency / HFT)

Location: LDN/WAW/HNK/SNG/TKY
Type: Freelance / Contract (B2B)
Compensation: Negotiated individually
Ownership: PnL-linked / ownership-based role

Context

A high-performance trading infrastructure is developing for low-latency, multi-asset trading.
 

Role

Work on core trading systems where:

• correctness is critical
• latency is a first-order constraint
• predictability matters more than feature velocity

This is a PnL ownership role — responsibility and compensation are aligned with outcomes.

Scope of work

• Low-latency trading components:
  • market data ingestion
  • order execution
  • internal messaging
• Performance-critical systems implemented in Rust
• End-to-end data path optimisation (from socket to decision)
• Design and implementation of:
  • lock-free / wait-free data structures
  • deterministic concurrency models
• Profiling, benchmarking, and bottleneck elimination
• Systems work close to the metal, where abstractions are explicitly questioned

Requirements (Must-have)

• Prior work on HFT, market making, or exchange infrastructure
• Excellent Rust:
  • ownership model
  • lifetimes
  • memory semantics
• Deep understanding of:
  • data structures
  • concurrency and memory ordering
  • operating systems
  • networking internals
• Practical experience with:
  • Linux performance tuning
  • multithreaded systems under sustained load
• Ability to reason about system behaviour under stress and failure conditions

Nice to have

• Kernel-bypass networking (DPDK, io_uring, AF_XDP, etc.)
• Experience with low-latency messaging
• FPGA / hardware acceleration exposure

Notes

• Contract / B2B only
• No visa sponsorship
• Position may remain open without immediate hiring