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John Rizal Javier

@johnrizjavieruser

Senior .NET developer building SaaS and enterprise systems, including 365sentri’s multi-tenant Microsoft 365 automation platform.

Spain

Message

At 365sentri, I co-founded and led engineering for a multi-tenant Microsoft 365 monitoring and automation SaaS. I built its Angular tenant-facing app and .NET Azure Functions backend, integrating Microsoft Graph, SharePoint, and Entra services.

As an independent consultant, I deliver SaaS, marketplace, payroll, and line-of-business applications. Recent work includes a runtime hot-loadable plugin architecture for an enterprise payroll platform and a .NET marketplace API with a Flutter app shipped through versioned releases.

At Accenture, I led enterprise application delivery and production support for a certification and audit-management platform. I resolved a long-standing timeout by designing and implementing a microservice-based processing engine in .NET.

Earlier, I built Microsoft cloud-partner management software at MSP Magic and test-floor and equipment systems at Automated Technology (Phil.) Inc. (ATEC), Nexperia, and Samsung Electronics.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer / Full Stack .NET Developer

Current

Independent Consultant

Jan 2026 - Present (9 months)

Delivered production SaaS, marketplace, payroll and line-of-business applications for clients across ASP.NET Core, Angular, React, Flutter, SQL Server, MySQL and Azure. Designed and built a hot-loadable plugin architecture for an enterprise payroll platform and a .NET 8 marketplace API with Firebase push notifications and Twilio OTP.

C#ASP.NET Core Angular React Flutter SQL Server MySQL Azure Entity Framework Core JWT Hangfire Swagger Firebase Twilio Sendgrid Google Play Stripe Dapper HtmlAgilityPack Entra ID GitHub Actions Astro TypeScript WinForms

Co-Founder & Lead Software Engineer

365sentri

Apr 2024 - Dec 2025 (1 year 8 months)

Co-founded and led engineering for a multi-tenant Microsoft 365 monitoring and automation SaaS, owning architecture, infrastructure, CI/CD, releases and production support. Built the Angular 16 SPA and .NET 8 Azure Functions backend with Durable Functions orchestrations and Stripe billing.

Angular .NET 8+Azure Functions Durable Functions Microsoft Graph SharePoint Azure Cosmos DB SQL Server PostgreSQL EF Core Key Vaults Sendgrid Polly Stripe PdfSharp Entra ID Azure Pipelines

Software Engineering Team Lead

Accenture

Apr 2023 - Apr 2024 (1 year)

Led enterprise application delivery and production support for a certification and audit-management platform, coordinating offshore and onshore stakeholders. Resolved a long-standing system timeout by designing and implementing a microservice-based processing engine in .NET.

.NET Microservices Hangfire DbUp Simple Injector AutoMapper OpenXML Salesforce Power BI Azure Event Hub Entity Framework Mentorship

Full Stack .NET Developer

MSP Magic

Feb 2021 - Apr 2023 (2 years 2 months)

Built core modules of a multi-tenant platform for Microsoft Cloud partners, including policy templates, compliance monitoring, and tenant onboarding. Modeled the MongoDB data layer and built Azure Key Vault, App Configuration, and Blob/Queue/Table Storage wrappers.

C#ASP.NET MVC TypeScript MongoDB Azure Key Vault Azure App Configuration Azure Blob Storage Azure Queue Storage Azure Table Azure Web Jobs Azure Functions Azure Pipelines SonarCloud WHMCS Docker

Full Stack .NET Developer

Automated Technology (Phil.) Inc. (ATEC)

Jun 2019 - Feb 2021 (1 year 8 months)

Built the test-floor management platform for a semiconductor customer's test operation, including ASP.NET MVC 5 and Web API portal with Excel import/export. Developed about 20 unattended Windows services for lot tracking, wafer-map download, and test-program auto-release.

ASP.NET MVC Web APIs .NET 4.5 Entity Framework jQuery Bootstrap EPPlus ExcelDataReader Windows Services SQL Server ASP.NET Core Swagger

Full Stack .NET Developer

Nexperia

Apr 2018 - Jun 2019 (1 year 2 months)

Built a SECS/GEM equipment-to-host interface in C# and WinForms for starting/stopping equipment processing and collecting measurement data. Developed a recipe management system and a machine performance dashboard with ASP.NET Web Forms and Oracle.

C#WinForms SECS GEM Protocols ASP.NET Web Forms Oracle Multithreading

Software Engineer

Samsung Electronics

Jun 2017 - Nov 2017 (5 months)

Built a test-program loader in VB6 that deploys test programs from a central server to production test machines. Developed a networked backup and recovery tool in C# and WinForms with SQL Server for distributed file copying and restoration.

VB6 C#WinForms SQL Server