Sam Wheat Email & Phone Number

Medford, Oregon, United States

Leader Analytics is an Azure Cloud based software development company. The company creates custom software products and websites based on Microsoft .NET. The company also develops an off-the-shelf product for the financial industry called Vyntix. Vyntix is a data management platform designed to acquire and aggregate financial data from multiple data sources such as the St. Louis Federal Reserve (FRED). Vyntix is a WPF application. Much of the user interface is written using DevExpress controls. The data access layer is based on Entity Framework Core. The DAL is designed to be database agnostic and currently has implementations for MSSQL server and MySQL. The data downloader component is highly parallelized and makes heavy use of the DataFlow library as well as the Task library. Vyntix is highly integrated with Azure and uses Microsoft Identity Platform for authentication.Leader Analytics also publishes a variety of open source libraries:Adaptive Client - a utility used to build a scalable service layer that is database and transport agnostic. FredClient - a high-performance, multi-threaded client for accessing data from the FRED API.Observer Desktop - a Blazor desktop app for downloading economic data from the St. Louis Federal Reserve Bank (FRED).Observer CLI - a command line utility based on FredClient that writes FRED API data to a MSSQL or MYSQL database. Leader Pivot, - a pivot control for Blazor, WPF, and WinUI.Vyntix website uses React hooks as the front end. The site is hosted on Azure and uses Microsoft graph for its subscriber database. Vyntix.com is integrated with Microsoft Identity Platform. The site is also integrated with Stripe, which is used for payment processing and as a subscription management portal. The new documentation site is written in Angular 10 and features unique routing and loading of static html files.LeaderAnalytics.com site is written in Angular 13 and is integrated with Microsoft Identity Platform.

Dyersburg, Tennessee, United States

Implemented four line-of-business applications that integrated with the company's ERP system. All applications were written in Blazor / net 8 (two were written in Blazor / net 7 and were migrated). MudBlazor was used for UI. UI is factored into reusable controls (Part selector, Warehouse selector, etc) that integrate via bindings.QA tagging system: Quickly identify and tag defective products. App runs on Zebra scanner guns. Used to create and print labels (SSRS) for various defects found in manufacturing. QA Tagger uses Entity Framework and uses LINQ queries extensively. Concept to production in three months.Paint gun charge monitoring: Simplify and accelerate data entry. Manage charge levels of paint guns on the manufacturing floor. UI designed for rapid data entry. This app uses Entity Framework and uses LINQ queries extensively. Concept to production in two months.Engineering pipeline: Eliminate redundant data entry, validate data and eliminate downstream errors. Automate creation of bill of materials. Complex drag-and-drop UI. Concept to production in two monthsCycle count request system: Automate creation of cycle count requests. Rapid data input, simply processes for managing and closing requests. Built reusable controls to display and select inventory by location. Concept to production in three months. MudBlazor was used for UI. UI is factored into reusable controls (Part selector, Warehouse selector, etc) that integrate via bindings. Backend database is DB2. Wrote a Dapper-like utility to reflect on model objects and map SQL reader results to correct model property. Service layer is based on Adaptive Client - granular, testable, reusable code, dependency injected. Refactored a complex sales query and ported it to net core. Reduced execution time from 18 minutes to under 50 seconds. Wrote a UI that allowed selection of ranges or intervals of line items i.e. 1-5 or 1:3:5.

Los Angeles, California, United States

Rewrote Summit, an application that had been floundering in development for almost a year and moved it into production in four months. Summit is a WPF application for re-balancing and allocating capital to groups of portfolios. It is built on top of Allvue (Black Mountain Everest). Summit uses Entity Framework and uses LINQ queries extensively.Spearheaded a movement to re-implement Agile and Jira for the development team. Documented Git workflows. Documented and implemented Agile ceremonies. Worked closely with Business Analysts and product owners to define requirements. Primary author of a complex requirement for a data entry screen for formulaic rebalancing against a benchmark by bond issuer. Mentored team members and DBA on how to source control the database using SQL Server Data Tools and dacpac files. Mentored development team on dotnet core, Entity Framework, dependency injection, coding best practices.Moved development from dotnet framework to dotnet core 6. Moved source control from TFS to Git (Azure ADO).Refactored every major application UI component to reduce and reuse code. Implemented MVVM. Injected services and components. Deployed DevExpress controls including a complex implementation of PivotGrid - a lynchpin of the application.Replaced a monolithic service layer with granular services that are testable and reusable. Used Adaptive Client and Autofac to implement dependency injection. Replaced ADO with Entity Framework.Implemented a framework for integration testing which includes functionality to drop and recreate the database for each test.

San Diego, California, United States

Principle developer for COKE, an application designed to capture exceptions in internal systems. Coke is written in .net core / SQL Server / Entity Framework. Front end is Angular 13 / TypeScript / RxJS. COKE also reads data from Oracle systems.Completely re-architected and re-wrote the service layer and web API for COKE. Used Adaptive Client to implement dependency injection, granular services, testable and reusable code. Designed and wrote a permission system which includes user roles. Implemented authorization on both the UI and API. Wrote a library of services that capture anomalies in various internal systems. Very heavy use of both Entity Framework and native SQL. Extensive use of Task-based asynchronous pattern. Wrote comprehensive integration tests for all services.Wrote a task agent that runs as a background service (Windows Service). Agent polls a schedule table and queues and runs jobs at specified times.Upgraded Angular UI from v6 to v13. Wrote numerous components, pipes, and services. Used TypeScript, RxJS Observables, Angular Material.Used Git and Azure Devops for pull requests, ticket management.

Vista, California, United States

Responsible for maintaining the API server component of the company's medical imaging platform. Server is written in C#, uses a proprietary ORM, uses MSSQL Server for data storage. Implemented a major improvement that allows users to customize how medical images are grouped and sorted in the viewer. Fixed numerous bugs and implemented many other minor improvements that had lingered on the backlog. Created a significant change in the design of the single sign-in policy that improved the user login experience.

Los Angeles, California, United States

Part of a core team that supports Visual Programming System (VPS) - the the company's central data management and scheduling system for all television and streamed content. VPS is a very large system that maintains metadata, program air dates, financial data, demographics, and business intelligence data for most of the business units within Fox. VPS is written in WPF and uses WCF to access it's service layer.Responsible for implementing many new features, reports, and input screens as well as implementing numerous bug fixes and improvements:Wrote a subsystem to query and export scheduling data to Excel. Data entry screens for specifying filter criteria, stored procedures and Excel export library (based on Syncfusion ExcelEngine).Major role in implementing a REST API to share data between systems within FOX. Wrote many stored procedures to export JSON. Designed and wrote a system job for querying changed data and exporting it.Wrote large portions of a Long Range Planning Report – wrote a complex UI that includes persisting report parameters. Wrote business logic that consolidates operations data across multiple business units.

Newport Beach, California, United States

Responsible for coding the UI and service layer for a rules-based reporting system for a high-profile fund manager. Implemented the new functionality as an add-on module for the company’s WPF based holdings platform. Wrote a regex based lexer for parsing expressions and constructing a UI based on the terms. Wrote several WPF controls for selecting funds and displaying animated messages.Re-designed and completely re-wrote an Angular based website using Angular 7. This site is used for uploading holdings and attributes to MSCI Barra One. Also made numerous fixes and enhancements to backend API. API is multi-threaded and extracts data from both SQL Server and Oracle (CID). It uploads to Barra One in batch via their API. Wrote build and release jobs in Azure Dev Ops.C# WCF, WPF, XAML, MVVM, LINQ, SQL Sever, Angular 7, RxJS, Angular DataTables, Bootstrap 4, Azure DevOpsFull-stack development.

San Diego, California, United States

Completely redesigned and rewrote an address verification service that interfaces with both USPS and UPS APIs. Wrote a service to translate product descriptions to multiple languages in support of the company’s B2C initiatives in Japan and Europe. Implemented a major enhancement to WPF ordering system that allowed customization and configuration of apparel items. Implemented a paged image menu for clients to upload artwork for custom products. Implemented a variety of fixes and upgrades for WPF based ordering platform. Configured builds and deployed releases using VSTS and Azure.C# WCF, WPF, XAML, MVVM, LINQ, SQL Server, VSTS, AzureFull-stack development.

San Diego, California, United States

Data provider for mortgage industry. Implemented major customization to company's client facing loan analysis tool. Scope of change was to compare fee changes as user shopped for loan services. Very heavy middle-tier and back-end work. Also created a complete Winforms UI. Implemented numerous improvements to company's primary loan estimating tool such as enhanced lookups using bootstrap modals and Jquery DataTables.C#, JavaScript, JQuery, JQuery DataTables, Bootstrap, MVC, Razor, SQL Server, LINQ, XpathFull-stack development.

San Diego, California, United States

Greenfield development. Large MVC web portal for managing procedures and internal controls for the Bank. Lead architect for site including views, view models, controllers, and service layer. Very heavy JavaScript and Ajax (most modules designed as single page applications).C#, JavaScript, JQuery, Bootstrap, MVC, Razor, SQL Server, Entity Framework, LINQ.Full-stack development.

Costa Mesa, California, United States

Consumer division of multi-national credit reporting agency. Implemented a variety of upgrades and patches for a very large high volume public facing website.C#, MVC, Razor, SQL Server, WCF.Full-stack development.

Manhattan Beach, California, United States

Multi-billion dollar investment management company. Designed WPF UI and reports for analyzing cash flows.C#, WPF, Telerik, Entity Framework, SQL Server, Task Async Pattern, LINQ.Financial reporting, CSV import, matrix reports, pivot grids.

San Diego, California, United States

Operates 1000+ specialty retail stores worldwide. Designed and wrote an application for conducting physical inventory in stores.

Newport Beach, Ca

Coded large sections of a specialized WPF application for trading mortgage pools. Heavy use of Infragistics controls, especially XamDataGrid and XamPivotGrid. Wrote a queue monitor application that displays statistics and graphical information about a critical trade processing operation. Written entirely in WPF. Extensive use of TPL, timer objects, concurrent collections. Heavy use of XML serializer, LINQ, Telerik charting controls, Infragistics data controls. Currently working on a .NET 4.5 WPF application for processing inter-company trades. Extensive use of Entity Framework 5, LINQ, TPL, XML serializer, Infragistics controls. Designed a business logic layer that implements a service locator such that local clients can connect using the local area network and receive data using ADO, while remote clients can connect via WCF. Wrote a bin sorting algorithm that classifies securities based on user defined criteria (see http://www.samwheat.com/blogcms/Post/A-Combination-Finder-for-solving-business-problems).Wrote a matching algorithm that pairs offsetting long/short positions and solves for least number of transactions or least number of remaining positions. Extensive use of LINQ and TPL (see http://stackoverflow.com/questions/11208446/generating-permutations-of-a-set-most-efficiently/17154827#17154827). The implementation of this algorithm is in a worker class that runs in multiple parallel tasks.Wrote four WCF services, one that wraps the Bloomberg Server API and three that expose internal APIs.Wrote numerous custom WPF controls (derive from Control, not UserControl, implement dependency properties) including a slider control and a general purpose search control. Wrote several complex sections of code for allocating trades to client accounts and calculating available cash. All desktop applications at PIMCO implement MVVM.

Garden Grove, California, United States

DPAC is a manufacturer of high-tech computer memory products and wireless networking devices. They are a public company, traded on the NASDAQ exchange. They employ about 120 persons and generate revenue of over $30 million. Managed a department of three which included a network engineer, a help desk technician, and a graphic artist.ERP System Implementation• Selected to lead a team to purchase and implement a fully integrated ERP system. The system selected was Man-fact, made by Epicor. Implemented G/L, A/R, A/P, Purchasing, Order Entry, Work Orders, Bills of Material & Routings, Quality Assurance (lot numbering), and Job Costing (actual cost). Wrote a variety of input screens and reports and made numerous modifications to the code. Worked with several vendors to implement extensive customizations. Worked with every department on an ongoing basis to configure the system, train personnel, and resolve problems.Business Process Improvement• Implemented comprehensive inventory management procedures that allowed the company to maintain a perpetual inventory that was virtually error free. Wrote stock movement procedures for receiving parts into inventory, inspection and quality assurance, issuing parts to work orders, shipping finished product, and processing RMA’s.• Rewrote the order entry process to work around engineering delays and improved lead times on military orders by as much as two weeks.• Implemented an exception based inventory requirement system that used a simple net demand report. Reduced workload on expediters by prioritizing problem orders and greatly improved efficiency in purchasing by consolidating multiple sources of demand.• Created a complete month-end financial closing system that allowed Accounts Payable and Accounts Receivable to be closed within three days of month end.• Wrote a detailed programming specification and managed a major software upgrade that allowed the company to prioritize work orders and manage backlog