C# Developer | Software Engineering Practice at MARGO

About UsAt MARGO, our consultants focus on what truly matters: complex projects that combine intellectual challenge with real business impact. We support leading players in finance, industry, and technology in designing and developing high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join the Software Engineering Practice?You will be part of a team led by Paul Blois, Practice Manager at MARGO for 5 years, and Prosper Gratian, Practice Lead and C++ Developer. Working alongside them provides unparalleled insight into the company, close mentorship for your development, and the opportunity to contribute to demanding IT projects with significant impact for our clients.Your ResponsibilitiesYou will engage in the development of a core application for the front office of an investment bank, a booking tool that provides positioning and performs real-time risk calculations. This tool is essential for the trading floor and other data consumers such as risk management, accounting, and back office. You will be involved in:- Developing new features to enhance performance and reduce latency.- Optimizing code to ensure peak performance, particularly in multithreading and latency management.- Collaborating with front office teams and other client departments.Technical Challenges: Performance, multithreading, and latency management.Rich Functional Environment: You will work in a rich functional environment, interacting with several key departments.Tech Stack: C++ 17

Join our dynamic team at Meritis as a C# Front Office Developer (H/F) in the vibrant city of Paris. We are looking for an innovative and tech-savvy developer who is passionate about creating impactful software solutions for our clients in the finance sector. In this role, you will be responsible for developing, enhancing, and maintaining our front office applications using C#. If you thrive in a collaborative environment and are eager to take on new challenges, we would love to hear from you!

Who are we?At MARGO, our consultants engage in projects that truly matter: complex challenges that combine intellectual stimulation with direct impact on financial markets.We support leading players in financial markets on their most strategic projects involving real-time systems, trading, risk management, and the automation of financial product life cycles.Why join the CMT practice?You will be part of a team led by Christophe El Harake, Practice Manager CMT at MARGO, a former Business Analyst at BNP, ENGIE, and Amundi.Working alongside him means joining a passionate team of experts, receiving high-level mentorship, being challenged technically and methodologically, and contributing to projects with a significant impact on financial markets.Your missionsWe are currently seeking C# Front Office Specialists for a major French investment and financing bank. You will work in the trading room, focusing on Fixed Income products as a C# Commando.Your responsibilities will include:- Rapid development of pricing and risk monitoring applications to meet the needs of market-making traders;- Addressing real-time constraints and ensuring application reliability and robustness;

Who are we?At MARGO, our consultants engage in what truly matters: complex projects that blend intellectual challenges with real business impact. We collaborate with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why join the Software Engineering Practice?You will be part of a newly established team led by Paul Blois, Practice Manager at MARGO for the past 5 years. Working alongside him means gaining in-depth knowledge of the company, receiving close guidance in your professional development, and contributing to demanding IT projects with significant impacts for our clients.Your missionsYou will join a newly formed team at a leader in the energy sector, tasked with designing an algorithmic trading platform dedicated to battery energy storage. This strategic project aims to stabilize the electrical grid by injecting energy during peak consumption.As a C# Developer, you will contribute to building a robust, scalable, and high-performance solution capable of managing assets across Europe and the United States.Your responsibilities include:- Trading Engine Development: Design the software components enabling algorithmic trading in Intraday markets.- Asset Optimization: Implement and run complex optimization models (considering weather, market prices, and consumption profiles).- Backtesting Platform: Develop a secure and efficient environment for traders to test and validate their algorithmic strategies.- Scalability & Evolvability: Participate in the architecture of a solution initially focused on batteries but eventually designed to integrate the entire renewable energy portfolio (wind, hydro, thermal).

Role overview Alten is hiring a C++/C Development Engineer for its Rail department in Paris. The team tackles projects that shape the future of transportation, with a focus on practical engineering and collaborative problem-solving. What you will do Design, develop, and maintain software using C++ and C for rail sector projects Work alongside fellow engineers to deliver dependable technical solutions Take part in technical discussions and contribute to process improvements Requirements Keen interest in software development and transportation technology Openness to learning and adapting to new technical challenges Collaborative mindset and proactive attitude Location This role is based in Paris.

About UsAt MARGO, our consultants focus on what truly matters: complex projects that blend intellectual challenges with significant business impact. We partner with leading players in finance, industry, and technology to design and develop high-performance software solutions, including distributed architectures, cloud platforms, real-time systems, and large-scale critical applications.Why Join Our Software Engineering Practice?You will work alongside an experienced team led by Paul Blois, Practice Manager at MARGO for 5 years, and Prosper Gratian, Practice Lead and C++ Developer. Collaborating with them means benefiting from in-depth company knowledge, receiving close mentorship for your career growth, and contributing to demanding IT projects that have a high impact on our clients.Your Responsibilities- Design, develop, and optimize high-performance C++ components.- Participate in the migration of critical applications.- Contribute to the establishment of an internal framework for cross-functional applications.- Ensure code quality, performance, and maintainability.- Engage in code reviews, continuous improvement, and sharing best practices.Technical Stack: Modern C++ (C++17/20)Associated tools and technologies: Kafka, ElasticSearch, Git, CI/CD, AWS.Challenges: Performance, robustness, and managing large data volumes (processing 9 billion messages).Desired ProfileWe are looking for a passionate C++ developer with an interest in real-time systems and financial markets, eager to thrive in complex, high-performance environments.- Master's degree (engineering school or university).- Strong skills in C++, multithreading, performance optimization, and development best practices (SOLID, unit testing).- Experience in critical systems development and real-time data stream processing.

Join Meritis as a Commando Python Front-Office Developer (H/F) in the vibrant city of Paris. We are looking for talented individuals to enhance our front-office applications using Python, delivering innovative solutions that meet the needs of our clients.

Join the dynamic Nexthink Engineering department, where you will be an integral part of a team dedicated to developing the Collectors—advanced endpoint agents utilized by millions of employees. These Collectors play a pivotal role in extracting and interpreting vital information from operating systems, sending it to our powerful data analytics systems, and enhancing user experience by identifying and resolving issues.As a Senior Software Engineer, you will face a series of exciting challenges: • Challenge #1: Develop comprehensive and reliable solutions. • Challenge #2: Create solutions for multiple platforms, leveraging the best features from each. • Challenge #3: Ensure cross-platform compatibility wherever possible.Our engineers thrive on tackling broad, unconventional problems, refining them into actionable solutions. They continuously innovate, prototype new ideas, and measure their impact while upholding our unwavering standards of quality, performance, and security.

Role Overview Talan is hiring a Commando Front Office Specialist in Paris. This position serves as the first point of contact for clients and visitors, handling front office operations and daily interactions. The role focuses on delivering attentive service and maintaining a smooth experience for everyone entering the office. Main Responsibilities Welcome clients and visitors, responding to inquiries and requests promptly Oversee front office activities to ensure efficient operations Support service delivery through proactive problem-solving Help strengthen client relationships by providing reliable and courteous assistance Location This role is based in Paris.

Meritis seeks a C/C++ Developer in Paris to strengthen its financial markets team. This role focuses on building and enhancing applications that underpin finance operations. Key responsibilities Design, develop, and maintain software using C and C++ for financial systems Optimize application performance and resolve technical issues as they arise Work closely with colleagues from various teams to deliver effective solutions Location This position is based in Paris.

Join Esri as a Lead Principal C++ Software Developer focusing on Network Diagram technologies. In this pivotal role, you will design, develop, and optimize software solutions that enhance spatial data visualization and management. You will collaborate with cross-functional teams to deliver robust applications and contribute to innovative solutions that push the boundaries of geographic information systems (GIS).

Join our dynamic team at Meritis as a C++ Developer! In this role, you will be responsible for designing, implementing, and optimizing software solutions that meet our clients' needs. We are looking for innovative thinkers who are passionate about technology and eager to contribute to exciting projects.

Role Overview Meritis is looking for a C# Developer (H/F) to join the team in Paris. This position centers on building applications and supporting ongoing projects alongside experienced colleagues who care about quality and technology. What You Will Do Develop C# applications as part of project teams Work closely with professionals from different disciplines Contribute to project success through hands-on coding and collaboration Location This role is based in Paris.

Role Overview Meritis is looking for a C# Developer to help design and build software solutions in Paris. This role involves collaborating with a skilled team to deliver applications that support client requirements. The team works with agile methods to ensure projects move forward smoothly and adapt to change. What You Will Do Develop and maintain applications using C# Contribute to the design and architecture of scalable software Work closely with colleagues to deliver solutions that match client needs Participate in agile ceremonies and contribute to a collaborative work culture Location This position is based in Paris.

About the Role Meritis is looking for a C# Developer to join its team based in Paris. This role involves working closely with colleagues to build software solutions for a range of projects. What You'll Do Develop and maintain applications using C# Collaborate with other professionals to deliver project goals Contribute to the design and implementation of new features Location This position is based in Paris.

About the Role meritis is hiring a C# Developer (H/F) to join the team in Paris. This role offers the chance to work on a range of projects alongside colleagues who value collaboration and technical skill. What You Will Do Contribute to projects using C# and related technologies Work closely with team members to deliver solutions Bring ideas and technical insight to group discussions Who We’re Looking For Experience with C# development Interest in technology and problem-solving Comfort working in a collaborative setting This position is based in Paris.

About the Role Meritis is looking for a C# Developer (H/F) to join the team in Paris. This position plays a key part in designing and building software solutions, taking projects from initial idea through to deployment. What You Will Do Participate in the full software development lifecycle, including design, development, testing, and deployment Work closely with team members to deliver reliable and maintainable code Contribute ideas to improve software quality and team practices Location This role is based in Paris.

About the Role Meritis is hiring a C# Developer in Paris. This position involves designing, developing, and maintaining software solutions. Collaboration with colleagues from different teams is a key part of the job, with a focus on delivering reliable results.

Meritis is looking for a C# / Angular Developer (H/F) to join the team in Paris. This position centers on building and maintaining software applications while working closely with colleagues who value both collaboration and continuous learning. Key responsibilities Design, develop, and maintain applications with C# and Angular Work as part of a team to ensure project goals are met Share technical input and contribute to group problem-solving Develop your skills by working alongside experienced developers Location This role is based in Paris.