11/11/2026 updated
100 % available
Lead Architect & Quant Developer - Low-Latency Trading Systems
Oplotnica, Slovenia
Only remote
Math phys (not completed) - FMF, UNI LJ, Slovenia, Comp Science (not completed), TU Graz, AustriaAbout me
Trading-systems architect and hands-on engineer (Rust, Python) who designs, builds and owns low-latency execution, market-data, simulation and quant-research infrastructure end to end. Previously CTO of a crypto exchange built for MiFID II and PCI DSS compliance, and Tech Lead at Bitstamp.
Finance SoftwaresLeadershipPython (Programming Language)Market MakerRust (Programming Language)High Frequency Low LatencyBackendB2b SoftwarepandasPerf (Linux)Low LatencyTeam ManagementDocker
Rust, C++20 & Python Development
Expertise in systems programming with Rust (async), C++20 and Python for building high-performance, low-latency trading and data infrastructure. Proven track record of reducing hot-path p99 latency by two orders of magnitude and delivering production-grade systems end to end.
Low-Latency & Performance Engineering
Deep knowledge of tail-latency reduction, NUMA-aware optimization, benchmarking, host- and runtime-level debugging, CPU pinning, IRQ affinity, BIOS tuning and OS scheduler configuration for predictable, ultra-low-latency production environments.
Trading Systems Architecture
Design and implementation of multi-asset HFT and quantitative-trading platforms covering execution, simulation, market-data and feed handling, order books, order-state machines, and CEX and DEX venue integration across FX, equities, futures, crypto spot and derivatives, and DeFi.
Concurrency & Hardware Optimization
Multithreading, lock-free SPSC queues and ring buffers, memory and cache behavior optimization, and async runtime tuning to maximize throughput and minimize latency on modern hardware.
Networking & Protocols
Hands-on experience with FIX, SBE, WebSockets, gRPC, binary feeds and formats, lossless gigabit packet capture, and Linux network stack tuning for financial data transport.
Profiling & Debugging
Systematic use of perf, flame graphs, VTune, gdb, Valgrind and sanitizers to identify and eliminate performance bottlenecks and correctness issues in complex systems.
High-Performance ETL & Research Infrastructure
Building scalable ETL pipelines with binary-format reverse engineering, out-of-core processing for datasets larger than RAM, and ML research infrastructure comparing 15+ models side by side.
LLM Tooling & Algorithmic Optimization
Practical application of Claude Code and Codex for LLM-driven algorithmic optimization, demonstrated by reducing core computation from O(n) to O(1) runtime complexity in open-source projects.
Compliance & Security (MiFID II, PCI DSS)
Architecture design and documentation audited for ESMA guidelines and MiFID II compliance; implementation of PCI DSS compliance, security protocols and coordination with external partners on penetration testing.
CI/CD & Test Automation
Introduction and optimization of CI/CD pipelines and 10,000+ parameterized tests, reducing full test-suite runtime to under 10 minutes; parallel Selenium tests and Selenium Grid setup cutting QA from 10 days to 12 minutes.
Expertise in systems programming with Rust (async), C++20 and Python for building high-performance, low-latency trading and data infrastructure. Proven track record of reducing hot-path p99 latency by two orders of magnitude and delivering production-grade systems end to end.
Low-Latency & Performance Engineering
Deep knowledge of tail-latency reduction, NUMA-aware optimization, benchmarking, host- and runtime-level debugging, CPU pinning, IRQ affinity, BIOS tuning and OS scheduler configuration for predictable, ultra-low-latency production environments.
Trading Systems Architecture
Design and implementation of multi-asset HFT and quantitative-trading platforms covering execution, simulation, market-data and feed handling, order books, order-state machines, and CEX and DEX venue integration across FX, equities, futures, crypto spot and derivatives, and DeFi.
Concurrency & Hardware Optimization
Multithreading, lock-free SPSC queues and ring buffers, memory and cache behavior optimization, and async runtime tuning to maximize throughput and minimize latency on modern hardware.
Networking & Protocols
Hands-on experience with FIX, SBE, WebSockets, gRPC, binary feeds and formats, lossless gigabit packet capture, and Linux network stack tuning for financial data transport.
Profiling & Debugging
Systematic use of perf, flame graphs, VTune, gdb, Valgrind and sanitizers to identify and eliminate performance bottlenecks and correctness issues in complex systems.
High-Performance ETL & Research Infrastructure
Building scalable ETL pipelines with binary-format reverse engineering, out-of-core processing for datasets larger than RAM, and ML research infrastructure comparing 15+ models side by side.
LLM Tooling & Algorithmic Optimization
Practical application of Claude Code and Codex for LLM-driven algorithmic optimization, demonstrated by reducing core computation from O(n) to O(1) runtime complexity in open-source projects.
Compliance & Security (MiFID II, PCI DSS)
Architecture design and documentation audited for ESMA guidelines and MiFID II compliance; implementation of PCI DSS compliance, security protocols and coordination with external partners on penetration testing.
CI/CD & Test Automation
Introduction and optimization of CI/CD pipelines and 10,000+ parameterized tests, reducing full test-suite runtime to under 10 minutes; parallel Selenium tests and Selenium Grid setup cutting QA from 10 days to 12 minutes.
Experience
Professional experience10+ years
Freelancer since2016
Languages
GermanFluentEnglishFluentSlovenianFluent
Project history
Reduced hot-path p99 latency by two orders of magnitude. Architected and built market-data infrastructure covering price, instrument, publisher and schema normalization across CEX and DEX venues, spot and derivatives. Built low-latency execution and simulation systems for multi-asset and crypto trading; optimized threading and the async Rust runtime on the hot path. Reduced tail latency through NUMA-aware optimization, benchmarking, and host- and runtime-level debugging. Tuned production hosts for low, predictable latency: BIOS, CPU pinning, IRQ affinity and OS scheduler. Iterated with quants on R&D with direct PnL impact; implemented HFT approaches in DeFi across multiple chains, integrating blockchains and DEXs (incl. Hyperliquid) and optimizing blockchain nodes.
Led the greenfield build of a Rust HFT and quantitative-trading platform for FX, equities, futures and crypto (spot and futures), owning the architecture while staying hands-on in the code. Designed and built the low-latency execution and simulation systems. Designed and built FIX and binary feed handling and high-performance ETL pipelines, WebSocket and gRPC sources; reverse-engineered and parsed binary data formats. Built scalable ML infrastructure comparing 15+ models side by side; order-book, order-flow and risk features; instant data access and out-of-core processing for datasets larger than RAM.
Led greenfield build of a C++20 high-performance crypto exchange. Designed and implemented core parts of the exchange's high-performance trading platform. Led a team of 15 senior engineers. Designed and documented the architecture, which was audited and found compliant with ESMA guidelines and MiFID II. Led and implemented PCI DSS compliance; defined security protocols and worked with external partners on penetration testing.