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James Cliff Jhon Griba

@jamescliffjhongriba

Message

Backend .NET developer building high-performance REST APIs and modernizing legacy systems.

Philippines

Message

What I'm looking for

I’m looking for a backend/.NET role where I can modernize legacy systems, build scalable REST APIs and microservices, optimize SQL, and improve reliability using observability and production support in a collaborative engineering team.

I’m a Software Developer with 11+ years of experience building high-performance REST APIs, modernizing legacy systems, and delivering scalable backend solutions across finance, logistics, and enterprise platforms. I focus on improving system stability, reducing defects, and optimizing API performance through clean architecture and efficient database design.

I work primarily in C# and modern .NET (including ASP.NET and .NET Core) to design and integrate RESTful services, often using microservices and N-tier approaches. I’m also strong in SQL and database optimization with PostgreSQL, SQL Server, and MySQL, and I’ve used production-grade patterns like the repository pattern and dependency injection to improve maintainability and readability. On the delivery side, I deploy and monitor services on AWS (ECS, CodeBuild, CloudWatch, CodeCommit), with observability and performance tuning supported through tools like structured logging and Kibana.

In my roles, I’ve owned full-cycle production support—diagnosing issues, performing root-cause analysis, and implementing long-term fixes to prevent recurring incidents. I also strengthen teams’ execution by collaborating cross-functionally to refine requirements, and by improving clarity through Swagger and Postman documentation/testing workflows. My teaching and mentoring background reinforces how I communicate complex technical ideas and build practical, hands-on solutions that teams can maintain.

Experience

Work history, roles, and key accomplishments

Current

.NET Developer

Current

HGS Offshore Staffing Solutions - Diversify ISS BGC Inc

Nov 2025 - Present (8 months)

Contributing to the modernization of a legacy client service into a scalable, service-based application using .NET. Refactoring legacy business logic into a fluent repository-driven architecture and improving reliability via structured logging and modern .NET practices.

C#SQL Server MSSQL Dapper Gitlab Kibana Git Visual Studio Podman Async Programming Dependency Injection Clean Architecture Legacy Modernization

Senior ASP.NET Backend Developer

Guerilla 360 Integrated Solutions Inc.

Nov 2024 - Jul 2025 (8 months)

Designed and built RESTful APIs to modernize legacy workflows, improving performance and accelerating feature delivery. Optimized PostgreSQL schemas and queries and provided production support by diagnosing issues and implementing long-term fixes using AWS CloudWatch insights.

ASP.NET REST APIs C#PostgreSQL Gluonics ORM AWS CodeBuild AWS ECS AWS Cloudwatch Postman Swagger Git DBeaver Production Support Root Cause Analysis Performance Tuning API Documentation

Backend Developer

SHIPTEK Solutions Corp.

Nov 2018 - Jun 2024 (5 years 7 months)

Built and maintained enterprise-grade REST APIs for logistics, accounting, and loan-processing modules, including integration with third-party financial services. Provided full-cycle production support with root-cause analysis and improvements to reduce recurring incidents, including structured logging and API performance monitoring.

REST APIs SQL Server MySQL Laravel PHP C#.NET Core Entity Framework EF Core Postman Swagger AWS CodeCommit AWS Cloudwatch Git DBeaver Production Support Root Cause Analysis API Monitor Third Party Integrations

Consultant / Developer

MONAD Solutions

Feb 2023 - Dec 2023 (10 months)

Developed custom REST APIs based on client specifications and delivered scalable, maintainable solutions across multiple deployments. Diagnosed production issues and implemented long-term fixes, improving API reliability through documentation, Swagger definitions, and Postman testing workflows.

REST APIs C#.NET Core MySQL Entity Framework EF Core Postman Swagger AWS CodeCommit AWS Cloudwatch Git DBeaver API Documentation Postman Testing

Lecturer 3

STI College Tanay

May 2017 - Nov 2018 (1 year 6 months)

Taught senior high school students programming, databases, and mobile app development using hands-on, project-driven instruction. Designed lesson plans and real-world exercises and mentored capstone programs to improve student comprehension and problem-solving.

Teaching Curriculum Design Lesson planning Programming Instruction MySQL C# .NET Java Xamarin Android Studio Visual Studio

VB.NET Programmer

Rapid Forming Corp.

Nov 2016 - Feb 2017 (3 months)

Maintained and enhanced the company’s ERP system by developing new modules, improving workflows, and resolving logic inconsistencies. Optimized SQL stored procedures and developed Crystal Reports for accounting and operations while strengthening system stability through validation rules.

VB.NET ERP Development SQL Server SAP Crystal Reports Stored Procedures Query Optimization Visual Studio

Genexus Programmer

N2Sleep Diagnostics Inc / CHY MASS

Nov 2012 - Aug 2016 (3 years 9 months)

Developed and enhanced internal systems for inventory tracking, patient record management, and operational reporting using GeneXus and MySQL. Improved data accuracy and workflow efficiency through tool upgrades and optimizations while ensuring secure and reliable processing with privacy compliance.

MySQL Java C#Visual Studio Navicat Apache Tomcat Data Privacy Compliance

IT Instructor

STI College Ortigas-Cainta

Jul 2011 - Apr 2016 (4 years 9 months)

Delivered college-level lectures in programming, database systems, object-oriented development, and software engineering aligned with industry standards. Designed coursework and lab activities and mentored students on thesis and software projects to strengthen practical IT competencies and coding proficiency.