Senior DotNET AWS Developer

INFOZEN INC; Fort Mill (SC); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

Free uniforms

Health insurance

Paid time off

Job summary

Cognizant in Fort Mill, SC is seeking a Senior/Lead .NET/AWS Developer with 10+ years of experience. You will design, develop, and deploy enterprise-grade applications using C#, .NET Core, ASP.NET Core, and AWS services. Expect ownership from design through production, collaboration with business stakeholders, and a focus on performance and security.

The role emphasizes leadership, high-impact delivery, and mentoring junior developers within an onsite, long-term W2 contract.

Qualifications

• 8+ years of software/application development experience.
• Strong hands-on experience with C# and .NET/.NET Core.
• ASP.NET Core Web APIs and REST services experience.
• AWS cloud application development and deployment experience.
• Solid SQL/RDBMS knowledge (SQL Server, PostgreSQL, Oracle).
• Understanding of OOP, SOLID, and design patterns.
• Experience with microservices and distributed architecture.
• Knowledge of authentication, authorization, and security.
• Git and CI/CD pipelines experience.
• Strong debugging and performance-analysis skills.
• Excellent written and verbal communication.

Responsibilities

• Design, develop, test, and maintain enterprise applications using C#, .NET/.NET Core, ASP.NET Core, and Web APIs.
• Design and implement RESTful APIs, microservices, and backend services.
• Develop and deploy cloud-based applications using AWS.
• Work with AWS services such as EC2, ECS/EKS, Lambda, S3, RDS, API Gateway, CloudWatch, IAM, SQS/SNS.
• Design and optimize database solutions using SQL and relational databases such as SQL Server, PostgreSQL, or Oracle.
• Write and optimize complex SQL queries, stored procedures, functions, and database objects.
• Participate in application architecture, technical design, code reviews, and solution discussions.
• Identify application performance bottlenecks and implement performance improvements.
• Develop unit and integration tests and ensure adherence to development and coding standards.
• Troubleshoot development, testing, and production issues.
• Work with CI/CD processes and tools to automate application build and deployment.
• Collaborate with product owners, architects, business analysts, QA teams, DevOps teams, and other engineering teams.
• Provide technical guidance and mentorship to junior developers.
• Participate in Agile/Scrum activities, including estimation, sprint planning, design discussions, and retrospectives.

Skills

C# / .NET

ASP.NET Core

REST APIs

AWS cloud

SQL / RDBMS

Microservices

OOP / SOLID

Git / CI-CD

Debugging / performance

Communication skills

Leadership / mentoring

Problem solving

Tools

Docker

Kubernetes/EKS

Kafka / SQS / SNS

Terraform / CloudFormation

CloudWatch

Job description

Benefits:

• Free uniforms
• Health insurance
• Paid time off

Tittle: Senior/Lead .NET / AWS Developer Location: Fort Mill, SC

Client : Cognizant

Contract: W2 Long Term contract

Onsite 5 day per week

Job Summary

We are looking for an experienced Senior .NET Developer with a minimum of 10 years of software development experience, strong expertise in .NET/C#, AWS cloud services, and SQL/RDBMS. The candidate should have strong hands-on development and problem-solving skills, with experience designing and developing scalable, reliable, and secure enterprise applications.

The ideal candidate will possess good communication skills, work effectively with business and technical stakeholders, and be capable of independently owning technical deliverables from design through implementation and production support.

Key Responsibilities

• Design, develop, test, and maintain enterprise applications using C#, .NET/.NET Core, ASP.NET Core, and Web APIs.
• Design and implement RESTful APIs, microservices, and backend services.
• Develop and deploy cloud-based applications using AWS.
• Work with AWS services such as EC2, ECS/EKS, Lambda, S3, RDS, API Gateway, CloudWatch, IAM, SQS/SNS, as applicable.
• Design and optimize database solutions using SQL and relational databases such as SQL Server, PostgreSQL, or Oracle.
• Write and optimize complex SQL queries, stored procedures, functions, and database objects.
• Participate in application architecture, technical design, code reviews, and solution discussions.
• Identify application performance bottlenecks and implement performance improvements.
• Develop unit and integration tests and ensure adherence to development and coding standards.
• Troubleshoot development, testing, and production issues.
• Work with CI/CD processes and tools to automate application build and deployment.
• Collaborate with product owners, architects, business analysts, QA teams, DevOps teams, and other engineering teams.
• Provide technical guidance and mentorship to junior developers.
• Participate in Agile/Scrum activities, including estimation, sprint planning, design discussions, and retrospectives.

Required Skill Set

Must Have

• 8+ years of software/application development experience.
• Strong hands-on experience with C# and .NET/.NET Core.
• Strong experience developing ASP.NET Core Web APIs and REST services.
• Experience with AWS cloud application development and deployment.
• Strong understanding of SQL and RDBMS concepts.
• Experience with SQL Server, PostgreSQL, Oracle, or similar relational databases.
• Good understanding of Object-Oriented Programming (OOP), SOLID principles, and design patterns.
• Experience with microservices and distributed application architecture.
• Good understanding of authentication, authorization, and application security.
• Experience with Git and CI/CD pipelines.
• Strong debugging, troubleshooting, and performance-analysis skills.
• Good written and verbal communication skills.
• Ability to interact effectively with both technical and business stakeholders.
• Strong analytical and problem-solving capabilities.

Good to Have

• AWS certification or extensive hands-on AWS experience.
• Experience with Docker and Kubernetes/EKS.
• Experience with messaging/event-driven technologies such as Kafka, AWS SQS, or SNS.
• Knowledge of Infrastructure as Code, such as Terraform or AWS CloudFormation.
• Experience with observability and monitoring tools.
• Experience working in an Agile/Scrum environment.
• Exposure to enterprise integration and high-volume transaction-processing applications.

Preferred Candidate Attributes

• Strong ownership and accountability.
• Ability to work independently with minimal supervision.
• Capable of translating business requirements into technical solutions.
• Comfortable working in distributed/onshore-offshore teams.
• Good stakeholder-management and presentation skills.
• Ability to guide developers and drive technical implementation.

Interview focus:

Interview focus: .NET/C# fundamentals, API and microservices design, AWS architecture, SQL/query optimization, application performance, troubleshooting, system-design scenarios, and communication/leadership.