HFT C++ Core Systems Developer - 5-15 years experience
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Before you apply
LocationGlobal
Typefull-time
SenioritySenior
Experience5–15 yrs
DepartmentTechnology
Company size4+ people
PostedJun 16, 2026 · 4mo ago
Verified live3d ago
At a glanceSummarised by Seekless from the posting.
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
Strong analytical skills and ability to work in high-pressure, real-time environments
Collaborative team player who enjoys solving complex engineering problems
High ownership and initiative
Curiosity, intellectual honesty, and rapid learning
Clear, direct communication
Exceptional academic or industry backgrounds (preferred)
Skills
C++
C++17
C++20
C++23
C++26
Linux
TCP
UDP
Benefits
Free lunch
Global offsites
Team socials
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
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Design, develop, and optimize low-latency, high-performance trading infrastructure in modern C/C++ (latest standards).
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Implement efficient and scalable trading algorithms, order execution, and risk management systems.
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Deep understanding of exchange connectivity standards for market data and order entry
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Optimize CPU performance, memory management, and multi-threaded applications.
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Collaborate with quant researchers, traders, and infrastructure engineers to improve system performance.
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Profile, benchmark, and debug real-time systems to minimize latency and maximize throughput.
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Maintain robust and fault-tolerant system components for continuous trading operations.
Required Qualifications
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Expert-level proficiency in C++, with a strong grasp of modern C++ features (C++17/20/23/26).
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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
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Candidates with exceptional academic or industry backgrounds.
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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:
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High ownership and initiative
•
Curiosity, intellectual honesty, and rapid learning
•
Clear, direct communication
•
Working together toward shared goals — no ego, no politics
Compensation & Benefits:
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Very competitive compensation, with strong upside based on contribution and performance
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Competitive holiday allowance
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Free daily Deliveroo lunch
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High-spec office and technology
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Team socials
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Global company offsites and development opportunities
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