Software Engineer C++ - Trading Platform

Atto Trading; Lisboa; Hybrid; EUR 75,000 - 120,000; Full time

Benefits offered by this job

Healthcare & sports budget

25 days paid time off

Relocation support

International team meet‑ups

Learning and development support

Fully equipped workstations

Job summary

Atto Trading is seeking a C++ Software Engineer to join our rapidly expanding trading platform team in Lisbon. You will design and implement high-performance components, targeting ultra-low latency for large-scale alpha trading across asset classes.

Projects involve kernel-level networking interfaces, profiling-driven optimization, and collaboration with researchers. A BS in a technical field and strong C++14/17 (C++20 a plus) are required.

Qualifications

• 3+ years of C++ development on Linux
• C++14/17; C++20 is a strong plus
• Python and/or Bash scripting experience
• Linux systems programming, IPC and multithreading
• Bachelor’s degree in Computer Science, Computer Engineering, or related field
• Experience with latency and throughput optimization, profiling and PGO

Responsibilities

• Design and deploy performance-critical components for large-scale trading infrastructure.
• Develop high-frequency trading (HFT) systems in C++ with low latency and reliability.
• Write modern, efficient C++ code.
• Interface with networking hardware via kernel-bypassing drivers.
• Conduct performance research to push speed and scalability of the platform.

Skills

C++ development

Linux

Multithreading

Performance optimization

Profiling

Python scripting

OOP design

English communication

Networking basics

Kernel networking

Education

Bachelor's degree in Computer Science or related field

Tools

Python

Bash

Linux tooling

Job description

Software Engineer C++ - Trading Platform

Kyiv, Kyiv, Ukraine; Lisboa, Lisbon, Portugal

About Us:

Atto Trading is a dynamic quantitative trading firm at the forefront of global high-frequency strategies. We are seeking a C++ Software Engineer to join our growing team. We are expanding an international, diverse team, with experts in trading, statistics, engineering, and technology. Our disciplined approach combined with rapid market feedback allows us to quickly turn ideas into profit. Our environment of learning and collaboration allows us to solve some of the world’s hardest problems, together. As a small firm, we remain nimble and hold ourselves to the highest standards of integrity, ingenuity, and effort.

Position Highlights:

We are modernizing our trading and research platform to scale our alpha trading business. The platform will enable researchers to explore, test, and deploy sophisticated signals, models, and strategies across asset classes, in a robust, fully automated manner, while remaining within highly competitive latency targets. You will be responsible for building, maintaining, and supporting the platform that makes this possible. Your Mission & Goals:

• Design and deploy performance-critical components for large-scale trading infrastructure.
• Develop high-frequency trading (HFT) systems in C++ with an emphasis on low latency and reliability.
• Write modern, efficient code using the latest C++ standards.
• Interface directly with cutting-edge networking hardware via kernel-bypassing drivers.
• Conduct performance research to push the boundaries of our platform’s speed and scalability.

Must-have:

• 3+ years of hands-on experience with C++ development in a Linux environment
• Deep understanding of C++ standards (C++14, C++17; C++20 is a strong plus).
• Hands-on experience with Python and/or Bash scripting.
• Proficiency with Linux environments and system-level programming.
• Solid grasp of multithreading, IPC, and concurrent systems.
• Strong skills in latency and throughput optimization, including experience with profiling and PGO.
• Knowledge of OOP and software design patterns.
• Bachelor’s degree in Computer Science, Computer Engineering, or a related technical field.
• AI & Productivity Tools: Demonstrated ability to effectively leverage modern AI tools (e.g., generative AI, code assistants, research and productivity tools) to improve quality, speed, decision-making, and workflow efficiency while maintaining strong judgment, accuracy, and ownership of outcomes

Nice to have:

• Familiarity with OS internals and kernel-level networking.
• Understanding of financial instruments such as stocks, ETFs, futures, or options.
• Protocol-level networking knowledge (TCP/UDP/IP stack).

About you:

• Bachelor’s degree or higher in Computer Science, Computer Engineering, or a related field
• Fast, deep learner who owns their work end to end
• Handles multiple priorities in a fast-paced environment
• Thrives with autonomy, quick decisions, and a small, team-first environment
• Excellent attention to detail and a critical mindset: correct, efficient code held to very high standards
• Curiosity and passion for financial markets and trading, with a long-term view of a career in HFT
• Clear communicator with upper-intermediate (or higher) English

What we Offer:

• Competitive compensation package
• Performance-based bonus opportunities
• Healthcare & Sports/gym budget
• Mental health support, including access to therapy
• Paid time off (25 days)
• Relocation support (where applicable)
• International team meet-ups
• Learning and development support, including courses and certifications
• Access to professional tools, software, and resources
• Fully equipped workstations with high-quality hardware
• Modern office with paid lunches

Our motivation:

We are a company committed to staying at the forefront of technology. Our team is passionate about continual learning and improvement. With no external investors or customers, we are the primary users of the products we create, giving you the opportunity to make a real impact on our company's growth.

Please note, this position is available in our office in Kyiv, Ukraine (currently Lviv) or Lisbon, Portugal.