Principal/Senior Engineer - C# .Net, AWS, React - Trading sought by leading financial services organisation based in the city of London. Essential skills: * Proven experience as a senior/principal engineer in high-performance trading systems or similar domains. * Microsoft C# .Net backend, React front end and Java components. * Experience with low-latency, high-throughput messaging systems (e.g., Kafka, RabbitMQ, or proprietary systems). * Expertise in cloud technologies and deployment pipelines (AWS, GCP, or Azure). * Expertise in performance profiling and optimisation. * In-depth knowledge of financial markets * Hands-on experience with CI/CD, automated testing frameworks, and agile methodologies. * Hands-on coding experience with the ability to define and develop solutions and frameworks. * Experience of Application Lifecycle Management Tools and technologies such as Source Code Management; git, DevOps platforms; gitlabs, TeamCity * Use of and working with Containerization to aid deployability, testing and loose coupling. * Agile exponent to speed up delivery, reduce risk and provide maximum value to the end users Please apply for further details.