Senior C++ Developer

Join us as a Senior C++ Developer

Shape the future of real-time trading experiences

We are looking for a Senior C++ Developer to contribute to the design, development, and maintenance of our high-performance trading software solutions in Porto. You will build reliable, low-latency, and scalable systems that power mission-critical trading operations for banks, brokers, and funds.

This role requires strong autonomy, accountability, and a commitment to product quality and client success, while promoting a culture of excellence and continuous improvement.

Hybrid working model: 4 days per week in the office

Key Responsibilities

Software Design & Development:

• Design and implement C++ software modules focused on reliability, scalability, low latency, and real-time requirements
• Write effective, scalable, high-quality code and maintain existing components
• Develop robust trading functionalities across multiple asset classes and market workflows
• Optimize system performance, memory usage, and throughput for mission-critical applications
• Ensure adherence to internal coding standards, documentation practices, and version control
• Maintain product quality and consistency across releases

Quality, Accountability & Compliance:

• Design and execute automated unit, integration, and performance tests to guarantee stability
• Proactively identify and resolve bottlenecks and defects
• Ensure compliance with coding standards, security protocols, and confidentiality obligations
• Write, maintain, and update accurate technical documentation aligned with product releases
• Deliver tasks within agreed deadlines, maintaining high standards of efficiency and professionalism

Collaboration & Client Success:

• Work closely with Product Owners and Business Analysts to translate functional requirements into technical solutions
• Prototype solutions when required
• Support QA and DevOps teams to ensure smooth deployment and reliable production performance
• Contribute to customer satisfaction through robust, maintainable, and scalable systems
• Act as a proactive partner in achieving long-term client success

Leadership, Mentorship & Continuous Improvement:

• Mentor and guide junior Developers, promoting autonomy, accountability, and technical excellence
• Encourage knowledge sharing, code reviews, and team collaboration
• Stay current with advancements in C++ and trading technology
• Stay updated on financial markets, trading workflows, and relevant technologies
• Contribute to process improvement initiatives and best practices across the development lifecycle

Profile & Qualifications

Technical Skills:

• BSc in Computer Science, Engineering, or relevant field
• Minimum 5 years of professional experience in C++ development (C++11 or later) and Python Developer for server-side solutions
• Advanced SQL skills
• Excellent programming skills, with the ability to produce technical documentation in a simple and meaningful way
• Deep knowledge of development best practices (Agile methodology and Atlassian suite: Bitbucket, Jira, Confluence) and industry-standard libraries (stdlib)
• Strong expertise in multi-threaded, high-performance, and network programming
• Solid understanding of Linux environments, Version Control Systems, and CI/CD tools (Git, Jenkins)
• Full autonomy in using debugging and profiling tools
• Familiarity with containerization and orchestration tools (Docker, Kubernetes)
• Experience with financial systems, trading workflows, or market data preferred

Soft Skills & Mindset:

• Proven sense of accountability, autonomy, efficiency, and team working
• Strong analytical and problem-solving skills, with attention to detail and product quality
• Excellent communication and teamwork abilities, with a client-first mindset
• Commitment to confidentiality, continuous learning, and professional ethics

Languages:

• Fluency in English (both written and spoken)

Why Join Us

• Work on mission-critical, low-latency trading technology
• Join a highly collaborative environment where senior engineers have real influence
• Solve complex performance and scalability challenges with modern C++
• Mentor others while continuing to grow technically

Euronext Values

Unity

•        We respect and value the people we work with

•        We are unified through a common purpose

•        We embrace diversity and strive for inclusion

Integrity

•        We value transparency, communicate honestly and share information openly

•        We act with integrity in everything we do

•        We don’t hide our mistakes, and we learn from them

Agility

•        We act with a sense of urgency and decisiveness

•        We are adaptable, responsive and embrace change

•        We take smart risks

Energy

•        We are positively driven to make a difference and challenge the status quo

•        We focus on and encourage personal leadership

•        We motivate each other with our ambition

Accountability

•           We deliver maximum value to our customers and stakeholders

•           We take ownership and are accountable for the outcome

•           We reward and celebrate performance

We are proud to be an equal opportunity employer. We do not discriminate against individuals on the basis of race, gender, age, citizenship, religion, sexual orientation, gender identity or expression, disability, or any other legally protected factor. We value the unique talents of all our people, who come from diverse backgrounds with different personal experiences and points of view and we are committed to providing an environment of mutual respect.

This job description is only describing the main activities within a certain role and is not exhaustive. It does not prevent to add more tasks, projects.