C++ Developer - Experienced Hire

Susquehanna International Group; Dublin; On-site; EUR 70,000 - 90,000; Full time

Benefits offered by this job

Highly competitive compensation package

Extensive benefits

Collaborative environment

Job summary

Susquehanna International Group is seeking a C++ Strategy Developer to join our Trading Technology team in Dublin. In this role, you’ll design and develop low-latency trading applications using modern C++, collaborate with quantitative researchers, and optimize systems for performance in a competitive landscape. Ideal candidates have a degree in Computer Science or Engineering and experience in modern C++. We offer a competitive compensation package and encourage a diverse workplace culture.

Qualifications

• Professional experience developing performance-critical applications in modern C++ (C++11/14/17/20).
• Deep understanding of performance tuning, profiling, and optimisation methodologies.
• Familiarity with designing high-performance systems in real-time environments.

Responsibilities

• Design and develop low-latency, high-throughput trading applications using modern C++.
• Collaborate with quantitative researchers and technologists to implement and refine strategies.
• Build and tune systems to achieve optimal performance, reliability, and scalability.

Skills

Multi-threading

Memory management

IPC

STL

Boost

Network/socket programming

Education

Degree in Computer Science, Engineering, or related field

Job description

Overview

At Susquehanna International Group, our technologists play a critical role in shaping the future of electronic trading. We build high‑performance systems designed to compete in some of the most demanding and latency‑sensitive markets in the world. Our developers collaborate closely with quantitative researchers and infrastructure teams to solve complex technical and strategic problems that drive significant business impact. We're looking for a C++ Strategy Developer to join our Trading Technology team in Dublin. In this role, you’ll design, build, and optimise high‑frequency trading systems that process massive data streams in real time. You’ll work side‑by‑side with experienced technologists and quantitative analysts, gaining deep exposure to the logic and technology that powers automated decision‑making in global markets. Trading experience is beneficial but not required.

What You’ll Do

• Design and develop low-latency, high-throughput trading applications using modern C++ in a real‑time environment.
• Collaborate with quantitative researchers and technologists to implement and refine strategies.
• Build and tune systems to achieve optimal performance, reliability, and scalability in a competitive trading landscape.
• Optimise and troubleshoot infrastructure for latency, throughput, and system bottlenecks.
• Own the full software development lifecycle—from idea to production—while contributing to our long‑term architecture and tooling.

What We’re Looking For

• A degree in Computer Science, Engineering, or a related technical field. Professional experience developing performance‑critical applications in modern C++ (C++11/14/17/20).
• Strong command of multi‑threading, memory management, IPC, STL, Boost, and network/socket programming.
• Deep understanding of performance tuning, profiling, and optimisation methodologies.
• Familiarity with designing high-performance systems in real‑time environments (prior trading or financial industry experience is a plus, but not required).
• Passion for solving challenging technical problems, iterating quickly, and writing clean, maintainable code.

Why You’ll Love It Here

• Real Impact: Your work will be central to Susquehanna’s technology operations, directly impacting decisions and performance in global markets.
• Collaboration: You’ll partner directly with quants and technologists, working on cross‑functional teams where your input truly matters.
• Challenge & Growth: We value individuals who thrive on solving hard problems and continuously push to learn and improve.
• Culture of Excellence: Our flat structure and informal environment encourage innovation, fast feedback, and hands‑on ownership.
• Benefits & Perks: Susquehanna offers a highly competitive compensation package, along with extensive benefits designed to support you both professionally and personally.

Equal Opportunity Statement

We’re committed to building a diverse and inclusive workplace. We encourage candidates from all backgrounds to apply and are happy to provide reasonable accommodations during the hiring process.