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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - Streaming Platform - **Company:** FDJ UNITED - **Location:** Greater London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Amazon Web Services, Cloud Computing, Data Infrastructure, Distributed Systems, Monitoring of Systems, Software Engineering, Data Streaming, Event Driven Architecture, Build Management, Low Latency, Apache Flink, Apache Kafka, Build Tools, Spark Streaming, Video Streaming - **Published:** September 8, 2026 - **Apply:** https://www.collegerecruiter.com/job/2840574650-senior-software-engineer--streaming-platform ## About the Role * 5+ years software engineering experience in building distributed systems. * 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., * Experience in sports betting, trading platforms, or financial systems. * Experience building real-time alerting or monitoring systems. * Exposure to modern data platforms or lakehouse architectures. ## Description Focussing on our Sportsbook product, we're looking for a Senior Software Engineer to help build and evolve our next-generation trading risk platform, powering real-time liability and exposure management across multiple brands and markets. You'll primarily work on our Core Liability engine - a modular, event-driven system - delivering fast, accurate, and real-time insight into live positions and risk. This platform underpins critical trading decisions and represents a major step forward in scalability, resilience, and streaming architecture across our technology estate., What You'll Do * 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. * A real-time liability platform providing live visibility into exposure and risk across brands and jurisdictions. ## Related Videos - [Why and when should we consider Stream Processing frameworks in our solutions](https://www.wearedevelopers.com/videos/1085-why-and-when-should-we-consider-stream-processing-frameworks-in-our-solutions) - [Modern Data Architectures need Software Engineering](https://www.wearedevelopers.com/videos/1030-modern-data-architectures-need-software-engineering) - [Swapping Low Latency Data Storage Under High Load](https://www.wearedevelopers.com/videos/746-swapping-low-latency-data-storage-under-high-load) - [What If We've Been Scaling Stream Processing Wrong All Along?](https://www.wearedevelopers.com/videos/100139-what-if-we-ve-been-scaling-stream-processing-wrong-all-along) - [Python-Based Data Streaming Pipelines Within Minutes](https://www.wearedevelopers.com/videos/1233-python-based-data-streaming-pipelines-within-minutes) - [Building the platform for providing ML predictions based on real-time player activity](https://www.wearedevelopers.com/videos/944-building-the-platform-for-providing-ml-predictions-based-on-real-time-player-activity) ## Related Articles - [How Much FAANG Companies Actually Pay Software Engineers in 2025](https://www.wearedevelopers.com/magazine/230-how-much-faang-companies-actually-pay-software-engineers-in-2025) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Best Countries for Software Engineers](https://www.wearedevelopers.com/magazine/267-best-countries-for-software-engineers) - [How Much Does a Software Engineer Make? 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