Grade My Investments Technology Observatory
GMI · TECHNOLOGY OBSERVATORY // ALL SYSTEMS NOMINAL
ENGINEERED BY LEOPARD DATA

Technology Stack at a Glance

A consolidated reference of every framework, library, and service powering the Grade My Investments platform — a single .NET 10 solution spanning 32 projects, from Blazor and MAUI front ends to Azure Functions, machine learning, and Pulumi-provisioned cloud infrastructure.

Layered Stack Overview
rendering diagram…
flowchart TB
  subgraph PRES[Presentation Layer]
    direction LR
    web[Blazor WebAssembly<br/>Syncfusion UI - Bootstrap]:::app
    maui[.NET MAUI<br/>Mobile App]:::app
  end

  subgraph APIL[API Layer]
    api[Azure Functions<br/>Isolated Worker]:::app
  end

  subgraph SVCL[Services Layer]
    svc[Domain Services<br/>Documents - Reports]:::svc
  end

  subgraph MLL[Machine Learning]
    ml[Microsoft.ML<br/>AutoML - TimeSeries]:::svc
  end

  subgraph DAL[Data Access Layer]
    ef[EF Core 9<br/>Pomelo MySQL]:::svc
  end

  subgraph DATA[Data Stores]
    direction LR
    db[(Azure MySQL<br/>Flexible Server)]:::data
    blob[(Azure Blob<br/>Storage ZRS)]:::data
  end

  iac[Pulumi IaC<br/>Azure Native]:::sec
  obs[Observability<br/>Serilog - App Insights]:::sec
  ext[External Services<br/>Stripe - SendGrid<br/>Twilio - Claude - FMP]:::ext

  web --> api
  maui --> api
  api --> svc
  svc --> ml
  svc --> ef
  svc --> ext
  ef --> db
  ef --> blob

  iac -.-> web
  iac -.-> api
  iac -.-> db
  obs -.-> api
  obs -.-> svc
  obs -.-> ef

  classDef app fill:#1f2630,stroke:#C0894E,color:#F3EFE8;
  classDef svc fill:#241c14,stroke:#E2B583,color:#F3EFE8;
  classDef data fill:#22201a,stroke:#C0894E,color:#EBD3AE;
  classDef ext fill:#1b1f27,stroke:#5A616B,color:#C4C0B8;
  classDef sec fill:#1d2733,stroke:#5cc8e0,color:#eafaff;
End-to-end technology stack — Presentation through Data, with Infrastructure as Code and Observability spanning every layer

Presentation Layer

The user-facing web and mobile experiences, both built on the same .NET component model with shared Syncfusion UI controls.

Technology Version Role
Blazor WebAssembly 10.0.2 Client and Admin single-page web apps
.NET MAUI 10.0.41 Cross-platform mobile app
Syncfusion Blazor + MAUI 32.1.23 Grid, Charts, Spreadsheet, WordProcessor, TreeView, PdfViewer
Bootstrap CSS Responsive layout and component styling

Backend & API

  • Azure Functions (Isolated Worker) 2.51.0
  • .NET 10 / C# 32 projects

The API runs out-of-process on the isolated worker model, decoupling function code from the host runtime for full control over the .NET version and dependency graph.

Data & Storage

Technology Version Role
Entity Framework Core 9.0.6 ORM and data access
Pomelo MySQL Provider 9.0.0 EF Core MySQL driver
Azure Database for MySQL Flexible Server Primary relational store
Azure Blob Storage ZRS (prod) Report files and documents

Machine Learning

  • Microsoft.ML 5.0.0
  • ML.AutoML 0.21.1
  • ML.TimeSeries 5.0.0

Document Generation

Library Version Format
EPPlus 8.4.2 Excel workbooks
DocumentFormat.OpenXml OpenXML Word documents
PdfPig PDF PDF parsing and extraction
Markdig Markdown Markdown to HTML rendering

Integrations

  • Stripe.net — payments & billing 46.2.0
  • SendGrid — transactional email 9.29.3
  • Twilio — SMS delivery 7.8.0
  • Anthropic Claude — AI analysis API
  • Financial Modeling Prep — market data API

Identity & Authentication

  • Google OAuth Google.Apis.Auth — client sign-in
  • MSAL Microsoft.Authentication.WebAssembly.Msal — admin sign-in
  • Microsoft.Graph Directory and profile access

Infrastructure as Code

The entire Azure footprint is provisioned declaratively in C# with Pulumi — version-controlled, reproducible, and reviewed like application code.

  • Pulumi (C#) 3.82
  • Pulumi.AzureNative 3.5
  • Pulumi.Azure classic
  • Pulumi.AzureAD identity

Observability

  • Serilog Structured logging via Console and File sinks
  • Application Insights Distributed telemetry, traces, and metrics

Testing

  • xUnit 2.9.2
  • Moq mocking
  • FluentAssertions assertions
  • coverlet coverage

Hosting

  • Azure App Service Hosts the Blazor web applications
  • Linux VM (systemd) Runs background services as managed daemons
  • Single Region Central US

Platform Foundation

.NET 10
Runtime
32
Projects
C#
Language

A single language and runtime span the web, mobile, API, background services, and infrastructure code — maximizing code sharing and team velocity.