HFT C++ Core Systems Developer - 5-15 years experience

Core C++ Developer – Crypto High-Frequency Trading

About Selini:

Selini is a global trading firm focused on systematic trading and venture investing.

Overview

We are seeking an exceptional Core C++ Developer to contribute to the development and optimization of our high-performance trading systems . This role focuses on building ultra-low-latency infrastructure, optimizing execution speed, and ensuring robust system reliability. The ideal candidate will have deep expertise in modern C/C++ , systems programming, and high-performance computing.

Key Responsibilities

Design, develop, and optimize low-latency, high-performance trading infrastructure in modern C/C++ (latest standards) .

Implement efficient and scalable trading algorithms, order execution, and risk management systems .

Deep understanding of exchange connectivity standards for market data and order entry

Optimize CPU performance, memory management, and multi-threaded applications .

Collaborate with quant researchers, traders, and infrastructure engineers to improve system performance.

Profile, benchmark, and debug real-time systems to minimize latency and maximize throughput.

Maintain robust and fault-tolerant system components for continuous trading operations .

Required Qualifications

Expert-level proficiency in C++ , with a strong grasp of modern C++ features (C++17/20/23/26) .

Extensive experience in low-latency, high-performance systems programming .

Deep understanding of networking (TCP/UDP), concurrency, and multi-threading .

Strong experience in Linux-based development and performance tuning .

Experience with real-time, high-throughput systems where performance is critical.

Background in crypto or traditional finance trading systems

Soft Skills & Culture Fit

Candidates with exceptional academic or industry backgrounds.

Strong analytical skills and ability to work in high-pressure, real-time environments .

Collaborative team player who enjoys solving complex engineering problems .

We’re a close-knit team that values:

High ownership and initiative

Curiosity, intellectual honesty, and rapid learning

Clear, direct communication

Working together toward shared goals — no ego, no politics

Compensation & Benefits:

Very competitive compensation, with strong upside based on contribution and performance

Competitive holiday allowance

Free daily Deliveroo lunch

High-spec office and technology

Team socials

Global company offsites and development opportunities