Sr. Software Engineer/ .NET Developer

SGS Consulting; Alton (IL); On-site; USD 120,000 - 160,000; Full time

Job summary

SGS Consulting is seeking an experienced software engineer to design, develop, and maintain scalable .NET 8.0 applications in a AWS-driven environment. You will leverage 7+ years of hands-on development, 2+ years Python scripting, and expertise in secure authentication to deliver enterprise-grade solutions.

You will architect cloud-based systems on AWS, work with MarkLogic NoSQL databases, and drive data transfers and migrations securely while collaborating with architects and business teams.

Qualifications

• 7+ years of hands-on .NET development experience.
• 2+ years of Python scripting for automation.
• 5+ years designing cloud solutions on AWS.
• Experience with secure auth protocols (PingID, JWT).
• Experience with MarkLogic NoSQL databases.
• Strong data migration and file transfer skills.
• Experience with modern web tech (React, HTML5).
• Containerization with Docker/Kubernetes.

Responsibilities

• Design and maintain scalable .NET 8.0 applications.
• Use Python for scripting and automation.
• Architect cloud solutions on AWS with 5+ years' experience.
• Implement secure authentication/authorization (PingID, JWT).
• Develop databases including MarkLogic NoSQL.
• Lead data transfer and migration initiatives securely.
• Collaborate with architecture and business systems teams.
• Work from defined requirements via JIRA; no requirement gathering.
• Participate in ongoing dev cycles and meet timelines.

Skills

.NET 8.0 development

Python scripting

AWS cloud architecture

Authentication/Authorization

MarkLogic NoSQL

Data migration

Frontend web tech

Docker/Kubernetes

Education

Experience with .NET modernization/migration to .NET 8+ or microservices

Tools

Docker

Kubernetes

AWS (S3, Lambda, API Gateway, IAM)

MarkLogic

OpenID / PingID

Job description

Job Responsibilities:

• Design, develop, and maintain scalable applications using .NET 8.0, leveraging at least 7 years of hands-on development experience.
• Utilize Python programming skills (2+ years' experience) for scripting, automation, or integration tasks as required by project needs.
• Architect and implement cloud-based solutions on AWS, applying a minimum of 5 years’ experience with AWS services.
• Integrate secure authentication and authorization protocols, including PingID and JWT tokens.
• Design, implement, and optimize database solutions, including experience with MarkLogic (NoSQL) and other data storage technologies.
• Lead and execute data transfer and migration initiatives between systems or platforms, ensuring security and data integrity.
• Develop and enhance backend and middleware components using .NET 8.0.
• Implement integrations involving authentication/authorization protocols (Ping ID, OpenID, etc.).
• Handle data migration from legacy systems to AWS S3.
• Collaborate closely with the architecture and business systems teams.
• Work independently on pre-defined requirements (via JIRA tickets); no requirement gathering needed.
• Participate in ongoing development cycles and adhere to project timelines and coding discipline.

Skills:

• Design, develop, and maintain scalable applications using .NET 8.0, leveraging at least 7 years of hands-on development experience.
• Utilize Python programming skills (2+ years' experience) for scripting, automation, or integration tasks as required by project needs.
• Architect and implement cloud-based solutions on AWS, applying a minimum of 5 years’ experience with AWS services.
• Integrate secure authentication and authorization protocols, including PingID and JWT tokens.
• Design, implement, and optimize database solutions, including experience with MarkLogic (NoSQL) and other data storage technologies.
• Lead and execute data transfer and migration initiatives between systems or platforms, ensuring security and data integrity.
• Experience with .NET modernization/migration strategies, such as upgrading legacy .NET Framework applications to .NET 8+, or migrating to microservices.
• Strong knowledge of web technologies for handling large browser-based files (e.g., JavaScript, HTML5, WebAssembly, React or Angular frameworks).
• Familiarity with AWS S3, Lambda, API Gateway, and AWS IAM for secure storage, transfer, and serverless processing of large data files.
• Expertise with RESTful and GraphQL API design for seamless data transfer between web clients and backend/cloud services.
• Advanced understanding of secure file handling (e.g., encryption, validation, virus scanning) for uploads and downloads.
• Skills in DevOps and CI/CD for automating build, test, and deployment pipelines—especially cloud-oriented.
• Familiarity with event-driven architectures and message queues (e.g., AWS SNS/SQS, Kafka) for robust file-transfer workflows.
• Experience with cloud monitoring and logging tools (e.g., AWS CloudWatch, ELK stack) for file transfer and application health tracking.
• Understanding of scalability and performance optimization in web and cloud apps.
• Knowledge of containerization and orchestration technologies (Docker, Kubernetes) for scalable application deployment.
• Experience integrating or migrating legacy data systems (including lab notebooks and scientific data formats) into modern platforms.
• Experience with React.js or similar frontend frameworks.
• Prior exposure to unstructured data migration projects.
• Containerization expertise (Docker, Kubernetes).

Education/Experience:

• Experience with .NET modernization/migration strategies, such as upgrading legacy .NET Framework applications to .NET 8+, or migrating to microservices.