ERP Application Developer

Metal Exchange; Maryland Heights (MO); On-site; USD 90,000 - 130,000; Full time

Job summary

MX Holdings is seeking an ERP Application Developer to join our manufacturing IT team across St. Louis, MO, Leetonia, OH, or Wellsville, PA.

You will develop and support Microsoft D365 finance and supply chain extensions using X++, working closely with users, IT, and leadership to deploy reliable solutions. The ideal candidate has hands-on D365 and X++ development experience, extension-based development, and a solid grasp of build/deploy processes and production support.

Qualifications

• Hands-on experience with Microsoft D365 and X++ development.
• Experience with extension-based development and patterns.
• Familiarity with build, release, and deployment processes.
• Strong collaboration with IT, business users, and leadership.
• Experience maintaining D365 customizations and extensions.
• Production support and problem solving.

Responsibilities

• Develops, maintains, troubleshoots, and supports D365 customizations and extensions using X++.
• Designs and implements D365 extensions using supported patterns and integrations.
• Supports the full SDLC from requirements to deployment and continuous improvement.
• Manages D365 build, release, deployment, and environment management activities.
• Collaborates with business users to understand manufacturing, finance, supply chain processes.
• Translates requirements into stable, maintainable technical solutions.
• Troubleshoots production issues and implements durable fixes.
• Maintains existing D365 customizations and extensions.

Skills

D365

X++

Event handlers

Chain of Command

Forms & Tables

Data entities

Security & Integrations

SDLC

Deployment processes

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.