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Zinnia

Software Engineer III

Zinnia

. Design, develop, test, and maintain enterprise applications using C#, .NET, and ASP.NET Core .

Posted 11/10/2026full-timeAlpharetta • Georgia • United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing, developing, and maintaining enterprise applications using C#, .NET, and ASP.NET Core, with a strong focus on building secure RESTful APIs and optimizing SQL Server database performance. Proficient in cloud-hosted application development within AWS environments and integrating Generative AI capabilities into software solutions.

Highest-signal resume keywords
C#/.NET DevelopmentRESTful API DesignSQL Server Performance TuningAWS Cloud ServicesAgile/Scrum Methodologies

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
C#.NET.NET CoreSQL ServerRESTful APIsAWSAgile DevelopmentAutomated TestingCI/CDObject-Oriented Development
Soft Skills
Problem-SolvingCommunicationCollaboration
Tools & Technologies
KongRedisEC2S3LambdaRDSCloudWatchOAuth2OpenAPI/SwaggerSOAP/XML
Industry Keywords
Enterprise ApplicationsInsurance TechnologySaaS PlatformsLLM IntegrationHigh-Volume Applications

Tech Stack

Tools & technologies
AngularASP.NETAWSCloudEC2ReactRedisSDLCSOAPSQL.NET

About the role

Key responsibilities & impact
  • Design, develop, test, and maintain enterprise applications using C#, .NET, and ASP.NET Core
  • Build and enhance secure RESTful APIs supporting Zinnia's Life & Annuity Exchange platforms
  • Develop and optimize SQL Server database queries, stored procedures, and data integrations
  • Integrate Generative AI and LLM capabilities into application features and business workflows
  • Develop, deploy, and support cloud-hosted applications, primarily within AWS environments
  • Troubleshoot production issues, improve application performance, and contribute to system reliability
  • Partner with engineering, product, and business stakeholders to translate requirements into working software
  • Participate in Agile development, code reviews, automated testing, and continuous improvement
  • Share technical knowledge and mentor other engineers while maintaining hands-on development responsibilities
  • Contribute throughout the software development lifecycle, from technical design and development to testing, deployment, and production support

Requirements

What you’ll need
  • 5+ years of professional, hands-on software development experience with C# and Microsoft .NET
  • Strong command of C#/.NET and .NET Core, including MVC, Web API, and object-oriented development
  • Demonstrated experience designing, building, testing, and maintaining RESTful APIs
  • Strong SQL Server development experience, including complex queries, stored procedures, database design, and performance tuning
  • Working knowledge of Kong and Redis in API and caching architectures
  • Experience developing, deploying, or supporting cloud-hosted applications, preferably on AWS services such as EC2, S3, Lambda, RDS, and CloudWatch
  • Familiarity with design patterns, SOLID principles, source control, automated testing, and CI/CD
  • Experience contributing to the full SDLC within Agile/Scrum teams
  • Exposure to integrating Generative AI or LLMs into software applications
  • Strong problem-solving and communication skills, with an interest in collaborating across global teams
  • Demonstrated interest in continuing as a hands-on software developer
  • Bonus: Experience deploying and supporting LLM-powered functionality in production applications
  • Bonus: Familiarity with OAuth2, OpenAPI/Swagger, and API security practices
  • Bonus: Frontend experience with React or Angular
  • Bonus: Experience with enterprise SaaS platforms or insurance technology
  • Bonus: Familiarity with SOAP/XML integrations or SSRS
  • Bonus: Experience supporting regulated, high-volume enterprise applications

Benefits

Comp & perks
  • Health insurance
  • Dental insurance
  • Parental leave
  • 401(k)
  • Incentive/bonus opportunity
  • Tuition reimbursement
  • Career progression opportunities
  • Competitive compensation