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

Experience & technical skills

• Masters 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

Personal abilities & competencies

• 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

• Socit Gnrales 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.

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