ERP Application Developer

UNAVAILABLE; Maryland Heights (MO); On-site; USD 110,000 - 150,000; Full time

Job summary

MX Holdings is seeking an ERP Application Developer to work on Microsoft Dynamics 365 Finance & Supply Chain extensions. The role focuses on X++ development, extension-based patterns, and production support for our manufacturing division.

Location options include St. Louis, MO, Leetonia, OH, or Wellsville, PA, with close collaboration to IT and business units to deliver practical, reliable solutions.

Qualifications

• Hands-on experience with Microsoft D365 Finance & Supply Chain
• Proficient in X++ development and extension-based patterns
• Experience with build/deploy processes and production support
• Understanding of SDLC from requirements to deployment

Responsibilities

• Develops, maintains, troubleshoots, and supports D365 customizations and extensions using X++
• Designs D365 extensions with patterns including extension-based development, event handlers, and Chain of Command
• Supports the full SDLC: requirements, design, development, testing, deployment, and improvement
• Manages D365 build, release, deployment, and environment management with IT and stakeholders
• Collaborates with business users to understand manufacturing, finance, supply chain, inventory, purchasing, production processes
• Translates functional needs into stable, supportable technical solutions
• Troubleshoots production issues, identifies root causes, and implements durable fixes
• Maintains existing D365 customizations and extensions created by others

Skills

D365 development

X++ programming

Extension-based development

SDLC familiarity

Event handlers/Chain of Command

Integrations

Production support

Job description

Overview

Consider joining the MX Holdings family as an ERP Application Developer in one of our company locations- St. Louis, MO, Leetonia, OH, or Wellsville, PA. The ERP Application Developer is a hands-on Microsoft Dynamics 365 Finance & Supply Chain Developer that supports our manufacturing division, Pennex.

This role will be responsible for developing, maintaining, troubleshooting, and deploying D365 extensions using X++, while working closely with business users, IT, and leadership to understand operational needs and deliver practical, reliable solutions.

A successful candidate will have proven, hands-on experience with D365 and X++ development, including extension-based development, build/deployment processes, and production support.

Responsibilities

Essential Duties and Responsibilities:

• Develops, maintains, troubleshoots, and supports customizations and extensions in Microsoft D365 using X++.
• Designs and implements D365 extensions using Microsoft-supported patterns, including extension-based development, event handlers, Chain of Command, forms, tables, classes, data entities, security, and integrations.
• Supports the full SDLC, including requirements gathering, technical design, development, unit testing, code review, documentation, deployment, production support, and continuous improvement.
• Manages and supports D365 build, release, deployment, and environment management activities in coordination with IT and business stakeholders.
• Worsk closely with business users to understand manufacturing, finance, supply chain, inventory, purchasing, production, and related business processes.
• Translates functional requirements into technical solutions that are stable, supportable, and aligned with D365 best practices.
• Troubleshoost production issues, identify root causes, and implement durable fixes.
• Maintains existing D365 customizations and extensions written by internal or external developers.