Open to opportunities

John Rizal Javier

@johnrizaljavier

Message

Senior full-stack software engineer specializing in .NET, React, Azure and AI integration.

Spain

Message

What I'm looking for

I seek senior engineering roles focused on full-stack .NET/React development, Azure cloud architecture, and AI/LLM integration within distributed, async teams that value autonomy and scalable systems.

I am a senior software engineer with over eight years of experience building production systems across enterprise, SaaS, and cloud platforms. I specialize in full-stack product engineering using .NET and React, designing cloud architectures on Azure, and integrating AI tooling into development workflows.

I have built multi-tenant SaaS platforms from zero to production, resolved critical performance bottlenecks at enterprise scale, and led cross-functional teams in distributed, asynchronous environments. I design serverless and event-driven systems using Azure Functions, Service Bus and Event Hubs.

My hands-on technical stack includes C#, .NET 6/8, ASP.NET Core, Node.js, Python, React, Next.js, Angular, TypeScript, and databases such as SQL Server, PostgreSQL, MongoDB and Cosmos DB. I own CI/CD and infrastructure decisions using Docker, GitHub Actions and Azure DevOps.

I deliver independently as a consultant and have led engineering teams to improve performance, reliability and developer productivity while integrating LLMs and AI-assisted tooling (Claude Code, Codex, GitHub Copilot) into production workflows.

Experience

Work history, roles, and key accomplishments

Current

Independent Software Consultant

Current

Independent Consultant

Jan 2025 - Present (1 year 2 months)

Deliver full-stack features and Azure cloud architecture for clients, integrating AI-powered workflows and LLM tooling into production apps and enabling async distributed team delivery.

C .NET React Azure Functions Serverless AI Integration CI CD

Senior Full Stack Engineer

365Sentri

Apr 2024 - Dec 2024 (8 months)

Built a Microsoft 365 monitoring and automation SaaS platform from scratch with multi-tenant .NET and Angular architecture, integrating Microsoft Graph, PowerShell, SharePoint, and Outlook automation.

C .NET Angular Azure Functions Event Driven Architecture CI CD

Software Engineering Team Lead

Accenture

Apr 2023 - Apr 2024 (1 year)

Led delivery and production support for a large-scale enterprise application, coordinated offshore/onshore stakeholders, resolved a long-standing timeout by implementing a microservice processing engine, and mentored junior developers.

Team Leadership Microservices .NET Azure Production Support Stakeholder Management Architecture

Full Stack Developer

MSPMagic

Feb 2021 - Apr 2023 (2 years 2 months)

Built major product modules for an MSP SaaS platform, developed automation workflows and dashboards, integrated third-party APIs, and improved performance and UI/UX across multiple releases.

Angular .NET SQL Server API Integration Automation Performance Optimization Frontend Backend

Full Stack Developer

ATEC

Jun 2019 - Feb 2021 (1 year 8 months)

Developed internal and customer-facing manufacturing applications, built .NET APIs and enterprise workflow systems, and improved efficiency through custom tooling and process automation.

C .NET APIs Process Automation Reporting SQL Server

Full Stack Developer

Nexperia

Apr 2018 - Jun 2019 (1 year 2 months)

Created and maintained internal applications and automation modules for semiconductor manufacturing, delivering dashboards, services, and integrations to support production systems.

C .NET Automation Dashboards Services Integration Manufacturing Systems

Software Engineer

Samsung Electro-Mechanics

Jun 2017 - Nov 2017 (5 months)

Developed internal enterprise applications using .NET and SQL Server, contributing to manufacturing systems that improved productivity and automation.

C .NET SQL Server enterprise applications Productivity