Senior Java Engineer – Low Latency Trading Systems; m​/f​/d - IT; Information Technology - Fran

Responsibilities

You will contribute to a high-throughput, low-latency trading platform, with direct impact on business performance:

• Design and develop high-performance Java components for real-time trading systems
• Deliver new features while maintaining strict latency, throughput and resiliency constraints
• Analyse and optimise system performance (CPU, memory, threading, GC)
• Collaborate closely with traders, business analysts and support teams
• Participate in production support (L3) and ensure system reliability
• Contribute to architecture evolution and scalability improvements
• Support onboarding of new products and business expansions
• Continuously improve development practices, tooling and automation
• Leverage AI-assisted development tools to accelerate delivery and code quality

• Master’s degree in computer science or equivalent
• Strong experience in Core Java (10+ years) in performance-critical environments
• Deep expertise in:
  Concurrency, multi-threading, synchronization, executors, Memory management, collections, streams, generics
• Proven experience in low latency / high throughput systems
• Experience with performance tuning & profiling tools (JMH, JProfiler, VisualVM, etc.)
• Solid knowledge of:
  Distributed systems, messaging (JMS), APIs (REST/gRPC), Unix/Linux environments, and SQL
• Experience with testing frameworks (JUnit, Mockito)
• Knowledge of derivatives/trading systems is a strong plus
• Agile mindset and familiarity with modern CI/CD tooling (Git, Jenkins)
• Fluent English required
• Interest or experience in AI-augmented development (Copilot, LLMs, automation tooling) is a strong advantage

• Strong analytical and problem-solving mindset in complex, performance-driven environments
• Ability to work autonomously and take ownership of critical components
• Excellent collaboration and communication skills in an international setup
• Pragmatic, results-driven, and passionate about engineering excellence

• Work on business-critical systems where milliseconds matter
• Benefit from an AI-enabled engineering environment
• Solve complex technical challenges at scale
• Exposure to global trading activities and stakeholders
• Direct impact on trading performance and revenue generation
• Business insight

Société Générale’s Global Business Technology & Operations (GBTO) delivers cutting-edge IT platforms supporting fast-growing trading businesses across global markets. Within GBTO, the Market Making Technology team builds and operates high-performance, in-house trading systems powering pricing, hedging, risk and execution across European exchanges and global locations (Frankfurt, Paris, London, HK, New York). Our platform handles hundreds of thousands of trades per day in a highly demanding real-time environment.

This role sits at the core of this ecosystem. You will join a team of highly skilled engineers working directly with trading desks to continuously improve performance, scale and capabilities of a mission‑critical low latency platform.