Senior Software Engineer, Java

FDJ UNITED

Senior Software Engineer focusing on building real-time liability and risk management systems for gaming company. Involves collaboration and complex technical solution design in a modular architecture.

Posted 7/22/2026full-timeLondon • 🇬🇧 United KingdomSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and building distributed, real-time streaming systems, with a strong focus on financial calculations and data consistency. Proficient in collaborating with cross-functional teams to translate complex domain requirements into scalable and reliable technical solutions.

Highest-signal resume keywords

Java ProgrammingApache FlinkEvent-Driven ArchitectureCloud Computing (AWS)High-Throughput Systems

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Hard Skills

Distributed SystemsStreaming TechnologiesData ConsistencyComplex Domain LogicAsynchronous ProcessingFinancial CalculationsReal-Time Risk InsightsLatency OptimizationRobust Technical SolutionsHigh-Throughput Environments

Soft Skills

Proactive Problem SolvingFlexibility to Learn

Industry Keywords

Bet LifecycleReal-Time StreamingModular ArchitectureAlerting FrameworkLiability Changes

Tech Stack

Tools & technologies

ApacheAWSCloudDistributed SystemsJavaKafkaSpark

About the role

Key responsibilities & impact

Design and build distributed, real-time streaming components within a Flink-based architecture
Develop and maintain services that process the full bet lifecycle, from acceptance through settlement, cancellation, and cashout
Implement complex financial calculations, including multi-bet and bet-builder logic, ensuring accuracy and consistency at scale
Build systems that aggregate exposure and generate real-time risk insights across outcomes, markets, and customers
Contribute to a granular alerting framework that detects and publishes meaningful changes in liability
Ensure correctness in a high-throughput environment through robust handling of ordering, duplication, and idempotency
Optimise streaming jobs for latency, throughput, and resource efficiency
Collaborate closely with trading and product teams to translate domain requirements into scalable, reliable systems
Contribute to a modular architecture where components evolve independently and scale with increasing demand

Requirements

What you’ll need

5+ years software engineering experience in building distributed systems
Excellent Java skills
Experience with streaming technologies (Apache Flink preferred; Kafka Streams, Spark Streaming, etc.)
Solid understanding of event-driven architecture and asynchronous processing patterns
Experience handling data consistency challenges such as at-least-once processing, idempotency, and event ordering
Experience building high-throughput, low-latency systems in production environments
Ability to model complex domain logic and translate business requirements into robust technical solutions
Experience in cloud computing, ideally AWS.
Proactive and ability to deal with and account for uncertainty, with the flexibility to learn by iteration

Benefits

Comp & perks

Health insurance
Retirement plans
Paid time off
Flexible work arrangements
Professional development