Dev - HFT C++ Core Systems Developer - 3-10 years experience

Posted 9 Days Ago
Be an Early Applicant
3 Locations
In-Office
Mid level
Database • Financial Services
Digital Assets trading and investments firm
The Role
Develop and optimize high-performance trading systems using modern C++. Responsibilities include building low-latency infrastructure, executing trading algorithms, and ensuring robust system reliability.
Summary Generated by Built In
Core C++ Developer – Crypto High-Frequency Trading

Location: New York, in office full time

About Selini:

Selini is a global trading firm focused on systematic trading and venture investing - all within the digital assets space.

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 from top-tier institutions or recognized as domain experts are preferred.
  • 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

Top Skills

C++
C++17
C++20
C++23
C++26
Linux
Multi-Threading
Tcp
Udp
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The Company
HQ: New York, NY
26 Employees
Year Founded: 2021

What We Do

Digital Assets trading and investments firm

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