Internship - Trading Application Support Specialist - Financial Markets

Horizon Software ? 

• A Fintech company specialized in designing a platform that facilitates various trading activities on electronic financial markets (automation of certain activities (Market Making, Algo Trading...), optimal order and execution management (Agency Trading, Order and Execution Management System…),
• A cutting-edge software deployed on-premises or as SaaS, 
• An ambitious product roadmap: Machine Learning, AI, Crypto Currencies, Low Latency… 
• A human-sized company (160 employees) where you can make a difference, 
• An international company present in 6 countries to serve clients in 26 countries, 
• A committed company: B-Corp certified, partner of Planet Tech’care, Ethical IA and Lakaa, endowment fund, 
• A recognized and awarded company for its technological expertise: Best Sell-Side EMS (TradingTech Insight Awards Europe 2026), Best Sell-Side OMS (TradingTech Insight Awards Europe 2025) and Best Multi-Asset Trading System of the Year (FOW International Awards 2025).

Your daily life?

As a Trading Application Support Specialist within the framework of a long-term internship of 4 to 6 months based in Paris or Dubai, you will join a team of 5 people and your main objective will be to successfully ensure the deployment of our solutions at our clients' premises (brokers, investment banks, stock exchanges...):

• Establish direct contact with the client throughout the incident resolution process and be the guarantor of the correct use of the software by the client, 
• Analyze incidents and define their criticality level, according to the processes and tools provided, 
• Handle client requests until their resolution or escalation, recommending workarounds if necessary, 
• Deploy and install our solutions or new features at the client's premises. Train clients (users and IT teams) on our solutions, 
• Share client challenges and expectations with dedicated Client Delivery Managers and Engineering teams. 

The advantages of this position:

• Work in a dynamic and technically and functionally stimulating environment, 
• Be part of a talented and expert Client Support team in their field, 
• Have the opportunity to work on varied topics in an international environment, 
• Regular events (lunches, afterworks, climate awareness sessions...) 
• Human-sized team with local and close management, 
• Competitive salary and social benefits, 
• A dedicated and personalized onboarding program with a mentor to support you.

And if it were you?

• Graduated with a BAC+5 in computer science, you wish to work in a role combining client relations and technical analysis, 
• You are looking for a long-term internship, lasting 4 to 6 months, 
• You have an interest in financial markets and trading, 
• A customer service mindset, excellent interpersonal, communication, and teamwork skills describe you, 
• You have good analytical, synthesis, and writing skills and are fluent in English (oral and written), 
• Basic knowledge of Linux operating systems, system administration, all OO languages, and SDLC experience is a plus.