Sr. Software Engineer/ .NET Developer

SGS Consulting; Springfield (IL); On-site; USD 120,000 - 180,000; Full time

Job summary

SGS Consulting is seeking a senior software engineer to design, develop, and maintain scalable applications using .NET 8.0, with strong AWS experience and Python scripting for automation. The role includes migrating legacy data to cloud storage, implementing secure authentication (PingID/JWT), and leading data transfer initiatives, working closely with architecture and business teams.

You will contribute to backend and middleware development, apply modern cloud patterns, and participate in

Qualifications

• 7+ years of hands-on development experience with .NET 8.0.
• 2+ years of Python for scripting/automation.
• 5+ years of AWS services experience.
• Experience with authentication protocols (PingID, JWT/OpenID).
• Design and optimize NoSQL/MarkLogic databases and data storage.
• Lead data transfers and migrations with a focus on security.

Responsibilities

• Design, develop, and maintain scalable .NET 8.0 applications.
• Utilize Python for scripting and automation as needed.
• Architect cloud solutions on AWS and ensure secure authentication.
• Implement and optimize databases including MarkLogic.
• Lead data transfers and migrations between systems.
• Collaborate with architecture and business teams and meet project timelines.

Skills

NET 8.0 development

Python scripting

AWS cloud

Authentication protocols

Database design (NoSQL/MarkLogic)

Data migration

REST/GraphQL APIs

DevOps CI/CD

Docker/Kubernetes

Frontend React/Angular

Tools

MarkLogic

Docker

Kubernetes

AWS Lambda

API Gateway

PingID

OpenID

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.