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I am John Christian Javier, a results-driven Full-Stack Engineer and Technical Lead with 9+ years building enterprise-grade web applications and 6+ years leading cross-functional teams. I specialize in React, Angular, Blazor, and ASP.NET Core, and have a strong track record delivering CRM platforms and internal tooling at enterprise scale. Most recently, I modernized a multi-tenant SaaS treasury management system, applying robust architectural practices, Blazor/.NET, and Azure cloud expertise. I thrive as both a hands-on engineer and a strategic leader, balancing complex feature delivery with agile coaching, process improvement, and stakeholder collaboration. I enjoy partnering with product, design, and operations to translate business needs into reliable software and measurable outcomes.…I am John Christian Javier, a results-driven Full-Stack Engineer and Technical Lead with 9+ years building enterprise-grade web applications and 6+ years leading cross-functional teams. I specialize in React, Angular, Blazor, and ASP.NET Core, and have a strong track record delivering CRM platforms and internal tooling at enterprise scale. Most recently, I modernized a multi-tenant SaaS treasury management system, applying robust architectural practices, Blazor/.NET, and Azure cloud expertise. I thrive as both a hands-on engineer and a strategic leader, balancing complex feature delivery with agile coaching, process improvement, and stakeholder collaboration. I enjoy partnering with product, design, and operations to translate business needs into reliable software and measurable outcomes.

John Christian Javier

Web Developer, Front-End Developer, Back-End Developer, +2

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I am John Christian Javier, a results-driven Full-Stack Engineer and Technical Lead with 9+ years building enterprise-grade web applications and 6+ years leading cross-functional teams. I specialize in React, Angular, Blazor, and ASP.NET Core, and have a strong track record delivering CRM platforms and internal tooling at enterprise scale. Most recently, I modernized a multi-tenant SaaS treasury management system, applying robust architectural practices, Blazor/.NET, and Azure cloud expertise. I thrive as both a hands-on engineer and a strategic leader, balancing complex feature delivery with agile coaching, process improvement, and stakeholder collaboration. I enjoy partnering with product, design, and operations to translate business needs into reliable software and measurable outcomes.…I am John Christian Javier, a results-driven Full-Stack Engineer and Technical Lead with 9+ years building enterprise-grade web applications and 6+ years leading cross-functional teams. I specialize in React, Angular, Blazor, and ASP.NET Core, and have a strong track record delivering CRM platforms and internal tooling at enterprise scale. Most recently, I modernized a multi-tenant SaaS treasury management system, applying robust architectural practices, Blazor/.NET, and Azure cloud expertise. I thrive as both a hands-on engineer and a strategic leader, balancing complex feature delivery with agile coaching, process improvement, and stakeholder collaboration. I enjoy partnering with product, design, and operations to translate business needs into reliable software and measurable outcomes.

Available to hire

I am John Christian Javier, a results-driven Full-Stack Engineer and Technical Lead with 9+ years building enterprise-grade web applications and 6+ years leading cross-functional teams. I specialize in React, Angular, Blazor, and ASP.NET Core, and have a strong track record delivering CRM platforms and internal tooling at enterprise scale. Most recently, I modernized a multi-tenant SaaS treasury management system, applying robust architectural practices, Blazor/.NET, and Azure cloud expertise.

I thrive as both a hands-on engineer and a strategic leader, balancing complex feature delivery with agile coaching, process improvement, and stakeholder collaboration. I enjoy partnering with product, design, and operations to translate business needs into reliable software and measurable outcomes.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Senior Full-Stack Developer / Development Lead at Self-Employed / Freelance

August 1, 2025 - Present

Joined as Senior Full-Stack Developer and promoted to Development Lead, now managing a team of 14 across developers, DBAs, and QA — maintaining an 80/20 split of hands-on development and team leadership responsibilities. Led a foundational re-architecture migrating the codebase from a Service-Oriented (SOA) layered architecture to a Modular Monolith with Clean Architecture, establishing clear domain boundaries and a scalable project structure for the full treasury platform. Designed and delivered a fully functional dashboard framework from scratch — implementing a grid canvas with drag-and-drop widget placement, a widget gallery, configurable filters, and a publish/save workflow enabling plug-in-ready treasury data visualizations. Architected and implemented a real-time session synchronization hub using SignalR, enabling unified session state between the modern SaaS web client and the legacy desktop client — ensuring both surfaces stay in sync without refresh or re-auth. Standard

Senior Full-Stack Developer / Development Lead at Core-X Design Inc.

May 1, 2022 - July 1, 2025

Served as primary senior developer on enterprise-scale CRM and in-house internal tooling projects — owning end-to-end feature development from requirements gathering through deployment, handling complex business logic and integrations across React and C# - ASP.NET Core. Designed and implemented complex UI modules for CRM workflows including dynamic forms, multi-step processes, role-based dashboards, and configurable reporting views. Built robust REST APIs and service layers supporting enterprise CRM operations, data synchronization pipelines, and event-driven workflows. Architected scalable database schemas and optimized MSSQL queries with indexing and stored procedures. Facilitated agile ceremonies, mentored a team of 15+, and collaborated with DevOps and security teams to ensure compliance and secure deployments. Coordinated multi-project releases and drove delivery cadence.

Software Engineer Specialist → Software Engineer at Accenture Inc.

May 1, 2017 - May 1, 2022

Progressed from Software Engineer Associate to Software Engineer Specialist over five years, contributing across enterprise web applications, data architecture, and BI initiatives. Built internal tooling using AngularJS, ASP.NET MVC, Razor views, and ServiceNow integrations. Led RPA automation initiatives and designed job schedules and system monitoring workflows to reduce manual interventions. Managed a GCP-hosted full-stack platform, including Cloud Spanner migrations to PostgreSQL, and designed Cloud Functions to validate data integrity during migrations. Led CI/CD pipelines, deployment plans, and cross-functional delivery activities, and mentored scrum teams of 5+ while guiding platform architecture and direction. Architected data models, ETL workflows, and dashboards enabling data-driven decisions.

Development Lead / Senior Full-Stack Developer at Freelance – Multi-Tenant SaaS Treasury Management System

August 1, 2025 - Present

Joined as Senior Full-Stack Developer and was promoted to Development Lead, now managing a team of 14 across developers, DBAs, and QA— maintaining an 80/20 split of hands-on development and team leadership responsibilities. Led a foundational re-architecture migrating from a Service-Oriented (SOA) layered architecture to a Modular Monolith with Clean Architecture, establishing clear domain boundaries and a scalable project structure for the treasury platform. Designed and delivered a dashboard framework from scratch featuring a grid canvas with drag-and-drop widgets, a widget gallery, configurable filters, and a publish/save workflow to enable plug-in dashboards for treasury data visualizations. Architected a real-time session synchronization hub using SignalR to keep the modern SaaS web client and legacy desktop client in sync without manual refresh or re-authentication. Standardized error handling via typed HTTP error pages and a circuit/middleware exception handler for consistent

Software Engineer Specialist at Accenture Inc.

May 1, 2017 - May 31, 2022

Progressed from Software Engineer Associate to Software Engineer Specialist, focusing on data architecture and enterprise web applications. Early BI work with SSRS reports and stored procedures, followed by web development with AngularJS, ASP.NET MVC, Razor views, and ServiceNow integrations. Led RPA automation and operations-monitoring workflows to reduce manual intervention. Contributed to a GCP-hosted full-stack platform using Angular and Node.js, later moving into architecture reviews and platform direction. Spearheaded a Cloud Spanner to PostgreSQL migration, designing Cloud Functions to validate data integrity table-by-table during cutover. Gained hands-on ownership of CI/CD pipelines, deployment plans, and cross-functional delivery activities. Led scrum teams of 5+ as development lead, orchestrating sprint planning and backlog refinement. Built data models, ETL workflows, and optimized reporting pipelines, enabling data-driven business intelligence and client dashboards.