Back-End Engineer EMEA - UTL & Position Management (F/M/D)

Flowdesk; London; On-site; GBP 50,000 - 90,000; Full time

Job summary

An innovative firm is seeking a Software Engineer to enhance its cutting-edge financial infrastructure for the crypto economy. In this role, you will design and optimize a high-performance real-time booking and position management system, ensuring precise calculations of PnL and exposure across various trading activities. You will collaborate closely with trading and risk teams to maintain data integrity and improve system resilience. This position offers an exciting opportunity to work in a dynamic environment focused on digital assets and algorithmic trading, where your contributions will significantly impact the future of finance.

Benefits

100% health coverage

Top-of-the-range equipment

Team events and offsites

Gym memberships (coming soon)

International mobility (coming soon)

Qualifications

• 5+ years in financial engineering or software development.
• Strong understanding of PnL and financial data modeling.

Responsibilities

• Develop and optimize real-time position management systems.
• Ensure accurate PnL and exposure calculations.

Skills

Rust

Financial Engineering

PnL Calculation

Database Management

Debugging

English Proficiency

Interest in Algorithmic Trading

Interest in Digital Assets

Education

Bachelor's Degree in Computer Science or related field

Master's Degree in Finance or related field

Tools

PostgreSQL

Message Queues

Job description

Flowdesk is building the financial infrastructure for the crypto economy. Our UTL (Universal Transaction Ledger) system is at the core of our real-time risk management and financial operations.

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.

Your Mission

Real-Time Position & Booking System Development

1. Design, develop, and optimize Flowdesk’s real-time position management system
2. Ensure accurate PnL, exposure, and unit cost calculations (WAC, FIFO, LIFO, etc.)
3. Maintain and improve message-driven architectures to ensure low-latency, high-reliability processing

Data Integrity & Financial Accuracy

1. Ensure reconciliation between positions, balances, and external data sources
2. Work with risk and trading teams to validate PnL and exposure calculations
3. Implement robust monitoring and alerting to catch inconsistencies early

Technical & System Architecture

1. Design scalable, distributed systems for financial data processing
2. Ensure system performance under high-frequency trading conditions
3. Optimize data storage and retrieval in PostgreSQL for large financial datasets

Collaboration & Ownership

1. Take full ownership of core components of the UTL system
2. Work closely with product, trading, and operations teams to ensure alignment
3. Continuously improve and refine system performance and resilience

Background & experience

1. 5+ years of experience in financial engineering, software development, or trading systems.
2. Strong understanding of PnL, exposure, and financial data modeling.
3. Proficiency in Rust (or willingness to upskill).
4. Strong database knowledge, especially with PostgreSQL.
5. Experience with message queues and event-driven architectures.
6. Strong debugging and troubleshooting skills.

Nice-to-have skills

1. Experience working in a crypto trading environment.
2. Background in prime brokerage or middle-office systems.
3. Experience in high-performance, low-latency systems.

Skills And Personality

1. Professional proficiency in English, French is a plus.
2. Interest in algorithmic trading.
3. Interest in financial/capital markets.
4. Interest in digital assets/cryptocurrency/DLT/blockchain.
5. Open-minded and curious.
6. Highly innovative, flexible and self-directed.
7. Software Craftsmanship mindset.

Benefits

1. International environment (English is the main language)
2. 100% health coverage
3. Top-of-the-range equipment, Macbook, keyboard, laptop stand, 4K monitor & headphones
4. Team events and offsites
5. Coming soon, gym memberships, international mobility & many other cool benefits!

Are you interested in this job but feel you haven't ticked all the boxes? Don't hesitate to apply and tell us in the cover letter section why we should meet!

Here's What You Can Expect If You Apply

1. HR interview (30')
2. Technical test
3. First Technical Interview (90')
4. Second Technical Interview (60')
5. Leadership Interview (30')
6. Culture Fit Interview (45')

On the agenda, discussions rather than trick questions! These moments of exchange will allow you to understand how Flowdesk works and its values. But they are also (and above all) an opportunity for you to present your career path and your expectations for your next job!