Patrick Jan Aristorenas — .NET Developer

Expertise in Full Stack Web (3.5 yr.).

Last verified on January, 2026

Core Skills

C/C++/C#

2 yr.

.NET Core

2 yr.

ASP Web API

1 yr.

Entity Framework

2 yr.

.NET Core Web API

1 yr.

Bio Summary

Experienced .NET Developer with over 4 years in full-stack development, proficient in C#, .NET Core, ASP.NET MVC, Web API, and Entity Framework. Skilled in front-end technologies including HTML, CSS, jQuery, AJAX, and foundational React. Expertise in Microsoft Dynamics 365 (Navision) integrations using Codeunits, XMLports, and SOAP, along with advanced T-SQL database modeling and optimization. Demonstrated ability in developing middleware solutions for retail POS systems and backend services for real estate applications. Holds a Bachelor of Science in Computer Science and has applied software engineering principles to deliver scalable ERP and reporting solutions.

Technical Skills

.NET Platform	ASP.NET MVC, ASP.NET WebForms, ASP Web API, Azure, Entity Framework, MS Dynamics 365, .NET Core
C++ Libraries and Tools	C/C++/C#
Databases & Management Systems / ORM	Microsoft SQL Server, T-SQL
UI Frameworks, Libraries, and Browsers	Ajax, HTML
Cloud Platforms, Services & Computing	Azure
QA, Test Automation, Security	Allure Report, Unit Testing
SDK / API and Integrations	ASP Web API
Methodologies, Paradigms and Patterns	SDLC, SOAP
Other Technical Skills	POS

Junior Applications Technical Developer (Full Stack)

Responsive Web Applications & ERP Integration

2018 – August 2022

Summary

Developed and maintained responsive web applications and ERP integrations using Microsoft technologies. Collaborated closely with business analysts to translate business requirements into scalable technical solutions.

Key Responsibilities

Developed responsive web applications using C#, .NET Core, HTML, CSS, jQuery, and AJAX
Improved user experience through dynamic, AJAX-driven interactions
Collaborated with business analysts to translate requirements into technical solutions
Integrated and customized Microsoft Dynamics 365 (Navision) modules
Built third-party system integrations using Codeunits, XMLports, and SOAP services
Designed and maintained RDLC reports with datasets, queries, and layouts
Modeled and optimized SQL Server databases using advanced T-SQL
Supported application data layers using Entity Framework

Technologies

C#, .NET Core, HTML, CSS, jQuery, AJAX, Microsoft Dynamics 365 (NAV/Business Central), Codeunits, XMLports, SOAP, RDLC, Microsoft SQL Server, T-SQL, Entity Framework

Senior Software Developer (.NET)

Backend, Middleware & ERP Integration

December 2022 – Present

Summary

Senior .NET developer responsible for backend systems, middleware solutions, and ERP integrations across retail and real-estate platforms.

Key Responsibilities

Developed backend services using C# and .NET
Built and maintained a stable Self-Checkout (SCO) middleware system for retail operations
Developed middleware integrations for LS Central POS and RMH POS
Integrated Maya payment terminals for payment processing
Created custom middleware solutions based on client and business requirements
Integrated backend systems with Microsoft Business Central ERP
Ensured system stability, scalability, and performance optimization
Supported ongoing development, enhancements, and maintenance of production systems

Technologies

C#, .NET, Middleware Development, Microsoft Business Central, LS Central POS, RMH POS, Maya Payment Terminals, SQL Server

Education

Bachelor of Science in Computer Science

Eulogio “Amang” Rodriguez Institute of Science and Technology (EARIST)

February 2023 – August 2024

Accountancy, Business & Management (JHS & SHS)

Calauag Central College – Calauag, Quezon

2012 – 2018

How to hire with Upstaff

Talk to Our Talent Expert

Our journey starts with a 30-min discovery call to explore your project challenges, technical needs and team diversity.

Meet Carefully Matched Talents

Within 1-3 days, we’ll share profiles and connect you with the right talents for your project. Schedule a call to meet engineers in person.

Validate Your Choice

Bring new talent on board with a trial period to confirm you hire the right one. There are no termination fees or hidden costs.

Why Upstaff

Upstaff is a technology partner with expertise in AI, Web3, Software, and Data. We help businesses gain competitive edge by optimizing existing systems and utilizing modern technology to fuel business growth.

Real-time project team launch

<24h

Interview First Engineers

Upstaff's network enables clients to access specialists within hours & days, streamlining the hiring process to 24-48 hours, start ASAP.

x10

Faster Talent Acquisition

Upstaff's network & platform enables clients to scale up and down blazing fast. Every hire typically is 10x faster comparing to regular recruitement workflow.

Vetted and Trusted Engineers

100%

Security And Vetting-First

AI tools and expert human reviewers in the vetting process is combined with track record & historically collected feedbacks from clients and teammates.

~50h

Save Time For Deep Vetting

In average, we save over 50 hours of client team to interview candidates for each job position. We are fueled by a passion for tech expertise, drawn from our deep understanding of the industry.

Flexible Engagement Models

Custom Engagement Models

Flexible staffing solutions, accommodating both short-term projects and longer-term engagements, full-time & part-time

Unique Talent Ecosystem

Candidate Staffing Platform stores data about past and present candidates, enables fast work and scalability, providing clients with valuable insights into their talent pipeline.

Transparent

No Hidden Costs

Price quoted is the total price to you. No hidden or unexpected cost for for candidate placement.

One Consolidated Invoice

No matter how many engineers you employ, there is only one monthly consolidated invoice.

Ready to hire Patrick Jan Aristorenas
or someone with similar Skills?

Book a call with Patrick Jan Aristorenas

Start Hiring