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Mattel Inc

Sr Software Engineer iSeries

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Job Title : .NET Program Developer

Staff Category : Developer and support analyst - D

Department : Information Technology

Reports To : Operation: MIMICS Competency Manager

Admin: MTIC Production Support Manager

Supervision Exercised : N/A

Authority for Approval : N/A

Job Summary

The .NET program developer is responsible for analyzing, designing, and developing business applications built on the .NET platform. This role ensures requirements are effectively translated into system solutions. The developer will work on system enhancements, production issues, and continuous improvements to ensure applications meet business needs, performance expectations, and compliance standards, and will take over the existing application developed by the intern.

Key Responsibilities

Application Development support

  • Work closely with the .NET System Analyst

  • Review technical designs and ensure alignment with requirements

  • Program coding based on the requirement, testing, and deployment phases.

  • Assist in code reviews and solution validation when necessary

Testing & Quality Assurance

  • Define test scenarios, test cases, and acceptance criteria based on requirements.

  • Support SIT (System integration test) and UAT (User acceptance testing)

  • Validate functionality and ensure it meets business expectations.

  • Coordinate defect tracking and resolution with development teams.

Production support and enhancement

  • Provide L2/L3 production support for .NET applications.

  • Analyze and troubleshoot system issues, perform root cause analysis (RCA).

  • Support application releases, patches, and enhancements.

  • Work proactively to identify improvement opportunities and reduce recurring issues.

Integration and Data Management

  • Design and support system integrations using REST APIs, Web Services, and messaging systems.

  • Work with SQL Server databases for data analysis, reporting, and troubleshooting.

  • Ensure data consistency, accuracy, and integrity across systems.

Governance, Compliance & Best Practices

  • Ensure adherence to SDLC, ITIL, and change management processes.

  • Follow security, audit, and compliance requirements.

  • Maintain proper version control and documentation standards.

Required Skills & Qualifications

Technical Skills

  • Strong experience in .NET / C#, ASP.NET, .NET Core, Java, VB, and web services.

  • Hands-on experience with IIS, Windows Services, and application configuration.

  • Strong SQL skills with SQL Server (querying, performance tuning, troubleshooting).

  • Experience with logging and monitoring tools.

  • Understanding of production environments, incident management, and ITIL concepts.

  • Experience with ITIL, ServiceNow, or any ticketing system process

  • Experience with Azure or AWS cloud environments.

  • Experience supporting high-volume, business-critical applications, e.g., EDI

Analytical & Functional Skills

  • Strong business analysis and problem-solving skills

  • Ability to convert business needs into technical requirements

Soft Skills

  • Strong analytical and problem-solving skills.

  • Ability to work under pressure in high-availability production environments (supporting manufacturing plants with an expected shorter resolution time)

  • Strong communication and presentation skills with end users and business stakeholders

  • Strong attention to detail and documentation discipline.

  • Attention to detail and structured thinking

Education & Experience

  • Degree in computer science, Information Technology or related field (or equivalent experience)
  • Min 5 years of experience in iSeries / application development or support area
  • Understanding of manufacturing back office, shop floor operation and trading companies’ operation is value added
  • Eager to work on-call or non regular hours (Asia time zone) whenever necessary
  • Eager to travel for intensive training during the initial 6-12 months