Location: In Office/Remote (Mon - Fri)
Shift Timings: US Shift
Department: Engineering
Experience: 3+ Years

Job Description

Millennium Group Inc. is looking for an experienced Software Engineer with robust hands-on experience in C#, .NET, AWS, WPF, Windows Services, IIS/Kestrel, and MS SQL/PostgreSQL.

The candidate will be responsible for developing, maintaining, troubleshooting, and enhancing our existing applications and services.

Key Responsibilities
Develop and maintain applications using C# and .NET.
Develop and maintain WPF desktop applications using XAML/MVVM.
Develop and support Windows Services and backend services.
Develop and maintain REST APIs hosted on IIS/Kestrel.
Work with Microsoft SQL Server and PostgreSQL, including complex queries, stored procedures, indexes, and performance tuning.
Deploy, monitor, and troubleshoot applications in AWS.
Troubleshoot production issues across application, database, server, and cloud environments.
Participate in code reviews, testing, deployments, and CI/CD processes.
Write clean, maintainable, secure, and well-tested code.




Collaborate with developers, QA, and business stakeholders.

Required Skills
C#
.NET / .NET 10
WPF / XAML / MVVM
Windows Services
IIS / Kestrel
Swagger
AWS
Microsoft SQL Server (MS SQL)
PostgreSQL
REST APIs
Entity Framework / EF Core
Git / Source Control
CI/CD
Solid debugging and problem-solving skills
Understanding of OOP, SOLID principles, design patterns, security, and performance optimization

Valuable to Have
Docker
Terraform / CloudFormation
AWS Lambda, S3, EC2, RDS, CloudWatch, IAM
Messaging technologies such as SQS/SNS
Experience modernizing or supporting legacy applications
Experience working in production environments
Speak one of these languages: Spanish, Russian, Ukranian

Candidate Profile

Looking for an engineer who can independently troubleshoot problems, work across the application/database/cloud stack, take ownership of production issues, and contribute to improving system performance and reliability.

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