Peter Leahy, Architecture Developer in Corowa, New South Wales, Australia
Peter Leahy

Architecture Developer in Corowa, New South Wales, Australia

Member since November 19, 2020
Peter is a senior developer with over 20 years of experience designing and implementing robust enterprise solutions. He has broad experience and is used to wearing many hats; he is outcome-focused and able to cover many roles to deliver the solution. Peter specializes in legacy system modernization and integrations.
Peter is now available for hire




Corowa, New South Wales, Australia



Preferred Environment

Visual Studio .NET, Azure, SQL, RESTful APIs, ASP.NET Web API

The most amazing...

...system I've designed is a nimble custom ERP framework which lead the digital transformation of a 24 hour per day feedmill business for more than a decade.


  • Development and Reporting Manager

    2017 - 2020
    Rivalea Australia
    • Designed and implemented a new unifying cloud application architecture to modernize a disparate suite of 30+ in-house applications. It was designed to allow a small team to move the apps over an extended time while still running.
    • Utilized the above architecture and built a deep integration to SAP Concur (cloud REST API) from a legacy on-premise ERP system CSB system (CSV only) that processes thousands of invoice payments daily.
    • Used logic apps to create a suite of integrations with Salesforce from our legacy ERP CSB system.
    • Built a canteen management application including a POS (point of sale) touch screen terminal and integration into the cloud-based payroll system Preceda.
    • Designed and implemented a new Azure tenant and cloud-WAN network architecture using express route.
    • Implemented an Agile project management process for the team and new CI/CD pipelines in Azure DevOps.
    • Designed a new role-based access control (RBAC) scheme in a new Active Directory domain using nested groups. This new scheme was synchronized to Azure AD and used for access control across custom applications and office 365, including Sharepoint.
    Technologies: Azure SQL, Azure PaaS, ASP.NET Web API, Blazor, Azure DevOps
  • Manager IT Infrastructure

    2012 - 2016
    Rivalea Australia
    • Started from zero processes and implemented an ITIL-based service desk process in ServiceNow with a 24 hour per day support phone number.
    • Created a shift roster system that integrated into the Cisco phone system to redirect the support phone number to the correct on-call agent.
    • Designed and implemented a new enterprise-wide IP addressing scheme.
    Technologies: PRINCE2, ITIL, ServiceNow
  • Senior Developer

    2003 - 2011
    QAF Feeds
    • Designed and developed a paperless production scheduling application for the 24 hour per day feed production facility.
    • Re-wrote the resource planning tools in .Net (from Delphi) including product, weighbridge, inventory, contract management, and deep integration in the SAGE finance system.
    • Integrated an ABB batch control server via SOAP web services for batch creation and reporting.
    • Reverse engineered the SAGE 500 database to integrate sales orders into the production schedule system we created.
    • Created a recursive product substitution matrix to dynamically alter recipes in the production system as ingredients ran out of inventory.
    Technologies: .NET, ADO.NET, Windows Presentation Foundation (WPF), SQL, SQL Server Reporting Services (SSRS), ASP.NET


  • MillIT

    A nimble custom ERP smart client application for a feed-milling business. This application has driven the digital transformation of the feed-mill business for more than a decade.

    Designed specifically for a small development team to keep up with the pace of business, the modular design of the underlying framework handled all of the "plumbing," freeing up the developers to focus on designing a solution to the business problem. Heavy use of WPF templates and a View-ViewModel design kept the project structure simple (only two code files for each business object) and easy to follow for new developers.

    As the primary developer (working remotely), I designed and developed the framework as well as ported the initial business objects, handing more of the development off to the rest of the development team once the base code was in production.

  • Production Schedule

    A .Net framework application to run a 24 hour per day feed manufacturing plant. As the central orchestrator, the system handled order allocation, truck logistics, feed substitution and inventory, dynamic recipe formulation, and contamination sequence checking.

    As the primary developer, I designed and built the system from business requirements. The system features deep integration with the single-mix recipe formulation system and ABB process control system.

  • Enterprise Architecture

    Inherited an unmanaged software portfolio, a combination of in-house developed on-premise .Net applications (both web and smart clients), a legacy on-premise ERP, and an ever-increasing number of SaaS applications.

    Leveraging various integration services within Azure and the Microsoft development stack, I set up architecture to enable integration across any app in the software portfolio (in-house or external) and a long-term, phased, in-house-built app modernization plan to the cloud.

    This architecture plan covered naming standards and structure throughout the stack, from databases, logic apps, and app services in Azure through the CI\CD pipelines in Azure DevOps and solution naming and structure in visual studio and GitHub.

    We targeted the Blazor server (waiting for WASM to mature) with an ASP.NET Core Web API back end on top of Azure SQL and targeting Enterprise PowerBI for reporting to leverage our investment in SSRS. This was secured using Azure AD for SSO.

  • NetProbe

    Part of a suite of tools I wrote for the support department, this API read in the configuration management database (CMDB) from ServiceNow to build a dynamic hierarchical list of network devices. The service monitored the status of these devices via ICMP and alerted the service desk if there was an outage.

    It was easy to assess the criticality of the outage as it would only show the top level of down devices and the number of devices affected below it. The API was very successful in helping the team start proactively monitoring the network and resolving some issues before the users were aware.


  • Languages

  • Frameworks

    Windows Presentation Foundation (WPF), .NET 4, .NET, ASP.NET Web API, Blazor, ADO.NET, ASP.NET, .NET Core, Bootstrap
  • Tools

    Visual Studio .NET, Azure Logic Apps, Azure App Service, Microsoft Power BI
  • Platforms

    Windows Server, Azure, Azure PaaS
  • Paradigms

    ITIL, REST, Azure DevOps, PRINCE2
  • Storage

    Azure SQL, SQL Server Reporting Services (SSRS)
  • Other

    Architecture, SOAP, CSV Import, ServiceNow, Web Services, RESTful APIs, ICMP, Network Monitoring, Single Sign-on (SSO)
  • Libraries/APIs

    Entity Framework

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