Technical Architect and Senior Back End Developer; C#,.Net , ASP.NET Core, EF Core; CPT Onsite

ENVIRONMENT:

OUR client in Climate Tech seeks a hands-on Technical Architect and Senior Backend Developer to take ownership of the platform’s end-to-end technical design and personally lead the build of its core Backend services. You will be the design authority for its Azure-native, microservices-based architecture and a Senior Engineer writing C# code in the cluster — equally comfortable in a whiteboard session with stakeholders, in a code review on a plugin assembly, and in a war-room debugging a production data ingestion job.

The successful candidate must have 8+ years of professional Software Engineering with at least the last 4 in a Senior, Architect, or Tech-Lead capacity on production cloud systems. You will also require deep C# and .NET expertise: .NET Core / .NET 6+ (and ideally .NET 8/10), ASP.NET Core, EF Core, async/await fluency, performance tuning, and modern C# language features.

DUTIES:

Architecture and technical leadership -

• Own the end-to-end technical architecture of the platform across the application plane (AKS), the data and analytics plane (Databricks/Delta Lake), and the Dev Ops/observability plane.
• Maintain and evolve the architecture documentation, decision records (ADRs), and reference diagrams; make and defend trade-off decisions with the CTO and product leadership.
• Define the service decomposition strategy, inter-service contracts, and the rules of engagement for the custom Orchestration Layer that mediates communication between Kubernetes services.
• Set non-functional standards — performance, scalability, resilience, security, observability — and verify the system meets them.
• Lead architecture reviews, code reviews, and design sessions; mentor Mid-level and Junior Engineers and grow the team’s depth in .NET, Azure, and distributed systems.

Hands-on Backend Engineering -

• Personally design, build, and maintain core Backend microservices in C# / .NET 10 (Ingestion, API, Auth, Orchestration) running in containers on AKS.
• Build out the Generic Data Ingestion Layer — the abstraction, the standardised internal data models, and the plugin SDK that other engineers use to onboard new data sources.
• Implement and review C# plugin assemblies for specific energy-domain sources: industrial meters (mines and smelters), invoice ingestion, ERP/financial system integrations, MES, and SAWEM market gateway.
• Design schemas and access patterns for the sharded SQL Server estate, the Redis caching layer, and Blob/ADLS storage; own data-tier performance and consistency.
• Implement secure runtime configuration (Azure Key Vault via CSI), workload identity, and authentication/authorisation flows backed by Entra .
• Build the integration surface between the operational AKS plane and the Databricks data platform — feeding Bronze, consuming Gold, and serving low-latency ML inference endpoints from AKS.

Delivery, quality, and operations -

• Own the Git Hub-based CI/CD pipelines into Azure Container Registry and AKS, including build, test, scan, and progressive deployment strategies.
• Embed observability from day one — structured Serilog logging, Application Insights tracing, Log Analytics queries, Azure Monitor dashboards and alerting — and use it to drive operational excellence.
• Define and enforce the testing strategy: unit, integration, contract, performance, and chaos/failure tests appropriate to a financially significant ETRM-adjacent system.
• Participate in production support, incident response, and post-incident reviews; close the loop back into design and standards.

Stakeholder and client engagement -

• Translate complex regulatory, market, and operational requirements (forecasting cadences, settlement rules, PPA/LTNPA obligations, demand-response participation, value-at-risk methodology) into pragmatic technical designs.
• Present the architecture confidently to client engineering, security, and audit teams — including in support of RFP responses, technical design documents, and SLA commitments.

REQUIREMENTS:

Core Engineering — Non-negotiable -

• 8+ Years of professional Software Engineering with at least the last 4 in a Senior, Architect, or Tech-Lead capacity on production cloud systems.
• Deep C# and .NET expertise: .NET…