Rose International
Date Posted: 12/05/2025
Hiring Organization: Rose International
Position Number: 494278
Industry: Biotech
Job Title: .Net Developer
Job Location: Chesterfield, MO, USA, 63005
Work Model: Hybrid
Work Model Details: 3 days onsite and 2 days remote
Employment Type: Temporary
FT/PT: Full-Time
Estimated Duration (In months): 13
Min Hourly Rate($): 70.00
Max Hourly Rate($): 80.00
Must Have Skills/Attributes: .Net, REST
Experience Desired: C# .NET development (10 yrs); AWS cloud platform experience (5 yrs); Node.js development (5 yrs); Kafka for event streaming (5 yrs)
Required Minimum Education: Bachelor’s Degree
**C2C is not available**
Job Description Qualifications
Bachelor’s or Master’s degree in Computer Science, related technical field, or equivalent practical experience
Experience
Minimum of 10 years of professional software development experience
At least 10 years of hands‑on C# .NET development
4 or more years working with ASP.NET Core
4 or more years of AWS cloud platform experience
2 or more years of Node.js development
Proven track record as a full stack .NET developer for 10+ years
Demonstrated experience building and deploying large-scale distributed systems
Skills
Expert-level proficiency in .NET middleware development
Advanced C# .NET development capabilities
Strong expertise in ASP.NET Core and Entity Framework
Proficient in dependency injection patterns and principles
Extensive experience with AWS cloud services and architecture
Solid understanding of Node.js development
Proficiency in React or Angular frameworks
Strong command of front‑end technologies including HTML5, CSS3, and JavaScript
Experience with Kafka for event streaming
Expertise in AWS Step Functions for workflow orchestration
Proficient in unit and integration testing using NUnit, XUnit, and MOQ
Advanced database design skills with PostgreSQL
Strong understanding of distributed systems and event‑driven architecture
Excellent problem‑solving and analytical thinking abilities
Collaborative mindset with ego‑less approach to teamwork
Responsibilities
Analyze, develop, test, and deploy software applications across the full development lifecycle
Design and implement large‑scale, distributed, event‑driven architecture and applications
Develop and maintain middleware solutions using .NET technologies
Build highly scalable REST APIs hosted in cloud environments
Create and optimize database designs using PostgreSQL with Entity Framework Core
Implement front‑end solutions using modern web technologies and frameworks
Develop serverless functions and integrate AWS services including Lambdas, S3, SQS, SNS, and Step Functions
Write comprehensive unit and integration tests to ensure code quality and reliability
Collaborate with autonomous team members to solve complex technical problems
Challenge existing processes and introduce innovative solutions to improve system performance
Manage source control workflows using GIT and maintain code repository best practices
Participate in code reviews and mentor team members on best practices
Benefits For information and details on employment benefits offered with this position, please visit here. Should you have any questions/concerns, please contact our HR Department via our secure website.
California Pay Equity For information and details on pay equity laws in California, please visit the State of California Department of Industrial Relations’ website here.
Rose International is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender (expression or identity), national origin, arrest and conviction records, disability, veteran status or any other characteristic protected by law. Positions located in San Francisco and Los Angeles, California will be administered in accordance with their respective Fair Chance Ordinances.
If you need assistance in completing this application, or during any phase of the application, interview, hiring, or employment process, whether due to a disability or otherwise, please contact our HR Department.
Rose International has an official agreement (ID #132522), effective June 30, 2008, with the U.S. Department of Homeland Security, U.S. Citizenship and Immigration Services, Employment Verification Program (E-Verify). (Posting required by OCGA 13/10-91.).
Only those lawfully authorized to work in the designated country associated with the position will be considered.
Please note that all Position start dates and duration are estimates and may be reduced or lengthened based upon a client’s business needs and requirements.
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Hiring Organization: Rose International
Position Number: 494278
Industry: Biotech
Job Title: .Net Developer
Job Location: Chesterfield, MO, USA, 63005
Work Model: Hybrid
Work Model Details: 3 days onsite and 2 days remote
Employment Type: Temporary
FT/PT: Full-Time
Estimated Duration (In months): 13
Min Hourly Rate($): 70.00
Max Hourly Rate($): 80.00
Must Have Skills/Attributes: .Net, REST
Experience Desired: C# .NET development (10 yrs); AWS cloud platform experience (5 yrs); Node.js development (5 yrs); Kafka for event streaming (5 yrs)
Required Minimum Education: Bachelor’s Degree
**C2C is not available**
Job Description Qualifications
Bachelor’s or Master’s degree in Computer Science, related technical field, or equivalent practical experience
Experience
Minimum of 10 years of professional software development experience
At least 10 years of hands‑on C# .NET development
4 or more years working with ASP.NET Core
4 or more years of AWS cloud platform experience
2 or more years of Node.js development
Proven track record as a full stack .NET developer for 10+ years
Demonstrated experience building and deploying large-scale distributed systems
Skills
Expert-level proficiency in .NET middleware development
Advanced C# .NET development capabilities
Strong expertise in ASP.NET Core and Entity Framework
Proficient in dependency injection patterns and principles
Extensive experience with AWS cloud services and architecture
Solid understanding of Node.js development
Proficiency in React or Angular frameworks
Strong command of front‑end technologies including HTML5, CSS3, and JavaScript
Experience with Kafka for event streaming
Expertise in AWS Step Functions for workflow orchestration
Proficient in unit and integration testing using NUnit, XUnit, and MOQ
Advanced database design skills with PostgreSQL
Strong understanding of distributed systems and event‑driven architecture
Excellent problem‑solving and analytical thinking abilities
Collaborative mindset with ego‑less approach to teamwork
Responsibilities
Analyze, develop, test, and deploy software applications across the full development lifecycle
Design and implement large‑scale, distributed, event‑driven architecture and applications
Develop and maintain middleware solutions using .NET technologies
Build highly scalable REST APIs hosted in cloud environments
Create and optimize database designs using PostgreSQL with Entity Framework Core
Implement front‑end solutions using modern web technologies and frameworks
Develop serverless functions and integrate AWS services including Lambdas, S3, SQS, SNS, and Step Functions
Write comprehensive unit and integration tests to ensure code quality and reliability
Collaborate with autonomous team members to solve complex technical problems
Challenge existing processes and introduce innovative solutions to improve system performance
Manage source control workflows using GIT and maintain code repository best practices
Participate in code reviews and mentor team members on best practices
Benefits For information and details on employment benefits offered with this position, please visit here. Should you have any questions/concerns, please contact our HR Department via our secure website.
California Pay Equity For information and details on pay equity laws in California, please visit the State of California Department of Industrial Relations’ website here.
Rose International is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, sexual orientation, gender (expression or identity), national origin, arrest and conviction records, disability, veteran status or any other characteristic protected by law. Positions located in San Francisco and Los Angeles, California will be administered in accordance with their respective Fair Chance Ordinances.
If you need assistance in completing this application, or during any phase of the application, interview, hiring, or employment process, whether due to a disability or otherwise, please contact our HR Department.
Rose International has an official agreement (ID #132522), effective June 30, 2008, with the U.S. Department of Homeland Security, U.S. Citizenship and Immigration Services, Employment Verification Program (E-Verify). (Posting required by OCGA 13/10-91.).
Only those lawfully authorized to work in the designated country associated with the position will be considered.
Please note that all Position start dates and duration are estimates and may be reduced or lengthened based upon a client’s business needs and requirements.
#J-18808-Ljbffr