Backend Engineer, Flowdesk

• 5+ years of experience in financial engineering, software development, or trading systems
• Strong understanding of PnL, exposure, and financial data modeling
• Proficiency in Rust (or willingness to upskill)
• Strong database knowledge, especially with PostgreSQL
• Experience with message queues and event-driven architectures
• Strong debugging and troubleshooting skills
• Professional proficiency in English, French is a plus
• Interest in algorithmic trading
• Interest in financial/capital markets
• Interest in digital assets/cryptocurrency/DLT/blockchain
• Open-minded and curious
• Highly innovative, flexible and self-directed
• Software Craftsmanship mindset

Desirable

• We are looking for a Software Engineer to develop, optimize, and maintain Flowdesk’s real-time booking and position management system
• This system is responsible for computing PnL, exposure, and unit cost calculations across multiple trading activities and asset classes
• You will work on a high-performance backend designed to support real-time financial processing while ensuring data integrity and reconciliation across multiple venues
• Design, develop, and optimize Flowdesk’s real-time position management system
• Ensure accurate PnL, exposure, and unit cost calculations (WAC, FIFO, LIFO, etc.)
• Maintain and improve message-driven architectures to ensure low-latency, high-reliability processing
• Ensure reconciliation between positions, balances, and external data sources
• Work with risk and trading teams to validate PnL and exposure calculations
• Implement robust monitoring and alerting to catch inconsistencies early
• Design scalable, distributed systems for financial data processing
• Ensure system performance under high-frequency trading conditions
• Optimize data storage and retrieval in PostgreSQL for large financial datasets
• Take full ownership of core components of the UTL system
• Work closely with product, trading, and operations teams to ensure alignment
• Continuously improve and refine system performance and resilience

• HR interview (30')
• Technical test
• First Technical Interview (90')
• Second Technical Interview (60')
• Leadership Interview (30')
• Culture Fit Interview (45')

• 💸 BSPCE
• 🌍 International environment (English is the main language)
• 🚃 50% of transportation costs & a sustainable mobility agreement
• 🍔 Swile lunch voucher (€9.25 per day, 60% covered)
• 🏥 100% Alan Blue covered for you and your children
• 💻 Top of the range equipment: Macbook, keyboard, laptop stand, 4K monitor & headphones
• 🎉 Team events and offsites
• 🔜 Coming soon: gym memberships, international mobility & lot of other cool benefits!

Total funding: $121.6m

Flowdesk is a crypto-financial services company building a trading infrastructure to provide market-making services for web 3.0 players. The company uses its low-latency trading infrastructure to offer Market-Making-as-a-Service, that enables clients to stay in control of their tokens and trading strategy.