My client builds mission‑critical software used globally to power real‑time operational systems. This role sits at the heart of the platform, designing, building, and supporting high‑performance integrations between devices, internal platforms, and third‑party systems.Youll work on real‑time TCP data ingestion, backend processing pipelines, APIs, and event‑driven architectures. This is not CRUD work. Its about reliability, throughput, latency, and data integrity at scale.What youll be doing: Building and maintaining TCP/IP‑based services ingesting high‑volume real‑time dataParsing, validating, and normalizing messy, unreliable device dataDesigning and developing REST APIs, webhooks, and system integrationsBuilding backend services primarily in C# / .NETDesigning and optimizing MS SQL Server schemas for time‑series / telemetry dataWorking with message queues (e.g. RabbitMQ, Kafka) for asynchronous processingImplementing retries, fault tolerance, monitoring, logging, and alertingDebugging across device, network, and backend layersSupporting partner integrations and technical onboardingDocumenting protocols, APIs, and integration flowsThis role rewards engineers who think in systems, not just features.Skills & Experience: Minimum 4+ years experience in backend development, infrastructure, or systems integrationStrong experience with C# / .NETSolid experience with MS SQL Server (performance tuning, schema design)Hands‑on experience building TCP/IP servicesExperience with real‑time or high‑volume data processing systemsStrong understanding of REST APIs, distributed systems, and authenticationExperience with message brokers (RabbitMQ, Kafka, or similar)Comfortable handling edge cases, unreliable data, and production issuesQualification: Relevant experience is prioritised. Formal qualifications are beneficial but not mandatory.