Full Stack Software Engineer

3Core Systems, Inc; Dallas, Northern (TX, KY); Hybrid; USD 110,000 - 160,000; Full time

Job summary

3Core Systems, Inc in Dallas, TX is seeking a hands-on Full Stack Software Engineer with 5+ years of experience to design, develop, test, and maintain modern web applications and backend services.

You will focus on C#/.NET Core backend development, microservices, Kafka-based integrations, AWS cloud environments, and React frontend development, with opportunities to contribute to DevOps and CI/CD pipelines in AWS.

Qualifications

• 5+ years of professional full stack software development experience.
• Strong hands-on development experience with C# and .NET Core /ASP.NET Core.
• Experience designing and developing REST APIs and microservices architectures.
• Experience with object-oriented programming, dependency injection,Entity Framework, and common software design patterns.
• Hands-on experience with Apache Kafka and event-driven architecture.
• Experience developing or supporting Kafka producers and consumers using .NET and/or Python.
• Experience integrating frontend applications with REST APIs.
• Experience developing and deploying applications within AWS cloud environments.
• Understanding of serverless and container-based application architectures.
• Experience with Docker and CI/CD pipelines.
• Experience with relational and/or NoSQL databases.
• Strong understanding of the software development lifecycle and modern application development practices.
• Experience working within Agile/Scrum development teams.

Responsibilities

• Build and maintain RESTful APIs and microservices-based applications using .NET Core.
• Design and support service-to-service communication within distributed application environments.
• Develop event-driven integrations using Apache Kafka, including producers and consumers built with .NET and Python.
• Troubleshoot Kafka messaging, event processing, and application integration issues.
• Integrate React applications with backend REST APIs and resolve frontend/UI defects.
• Work with SQL and NoSQL databases, including SQL Server, PostgreSQL, MySQL, and DynamoDB.
• Deploy and support applications within AWS serverless and containerized environments.
• Work with AWS technologies including Lambda, ECS, EC2, S3, APIGateway, and CloudWatch.
• Build, integrate, and maintain CI/CD pipelines used to automate application builds, testing, and deployments.
• Work with tools such as GitHub Actions, Azure DevOps, AWS CodePipeline, Git, and Docker.
• Participate throughout the full software development lifecycle, including design, development, testing, deployment, troubleshooting, and production support.
• Collaborate with senior engineers, QA teams, business analysts, product owners, and UX professionals.
• Participate in Agile/Scrum ceremonies including sprint planning, daily stand-ups, code reviews, testing, and retrospectives.
• Troubleshoot application performance, integration, messaging, and deployment issues and contribute to improvements in system reliability and maintainability.

Skills

C#/.NET Core

REST APIs

Microservices

React

AWS

Kafka

Python

SQL/NoSQL

Tools

Docker

CI/CD

Job description

Dallas, United States | Posted on 08/10/2026

Location: Dallas, TX Hybrid – 3 days onsite /2 days remote
Employment Type: Contract – 12 months (ability to extend)

PositionOverview

Full StackSoftware Engineer with approximately 5+ years of experience designing,developing, testing, and maintaining modern web applications and backendservices.

Thisposition will have a strong focus on C#/.NET Core backend development,microservices architecture, event-driven integrations using Apache Kafka, AWScloud environments, and React frontend development.

The idealcandidate will be a hands-on full stack developer who can build RESTful APIsand microservices in .NET, develop Kafka-based integrations using .NET andPython, contribute to React-based user interfaces, and support applicationdeployment through modern DevOps and CI/CD pipelines within AWS.

KeyResponsibilities

• Build and maintain RESTful APIs and microservices-basedapplications using .NET Core.
  
• Design and support service-to-service communication withindistributed application environments.
  
• Develop event-driven integrations using Apache Kafka, includingproducers and consumers built with .NET and Python.
  
• Troubleshoot Kafka messaging, event processing, and applicationintegration issues.
  
• Integrate React applications with backend REST APIs and resolvefrontend/UI defects.
  
• Work with SQL and NoSQL databases, including SQL Server,PostgreSQL, MySQL, and DynamoDB.
  
• Deploy and support applications within AWS serverless andcontainerized environments.
  
• Work with AWS technologies including Lambda, ECS, EC2, S3, APIGateway, and CloudWatch.
  
• Build, integrate, and maintain CI/CD pipelines used to automateapplication builds, testing, and deployments.
  
• Work with tools such as GitHub Actions, Azure DevOps, AWSCodePipeline, Git, and Docker.
  
• Participate throughout the full software development lifecycle,including design, development, testing, deployment, troubleshooting, andproduction support.
  
• Collaborate with senior engineers, QA teams, business analysts,product owners, and UX professionals.
  
• Participate in Agile/Scrum ceremonies including sprint planning,daily stand-ups, code reviews, testing, and retrospectives.
  
• Troubleshoot application performance, integration, messaging, anddeployment issues and contribute to improvements in system reliability andmaintainability.
  

RequiredQualifications

• 5+ years of professional full stack software developmentexperience.
  
• Strong hands-on development experience with C# and .NET Core /ASP.NET Core.
  
• Experience designing and developing REST APIs and microservicesarchitectures.
  
• Experience with object-oriented programming, dependency injection,Entity Framework, and common software design patterns.
  
• Hands-on experience with Apache Kafka and event-drivenarchitecture.
  
• Experience developing or supporting Kafka producers and consumersusing .NET and/or Python.
  
• Experience integrating frontend applications with REST APIs.
  
• Experience developing and deploying applications within AWS cloudenvironments.
  
• Understanding of serverless and container-based applicationarchitectures.
  
• Experience with Docker and CI/CD pipelines.
  
• Experience with relational and/or NoSQL databases.
  
• Strong understanding of the software development lifecycle andmodern application development practices.
  
• Experience working within Agile/Scrum development teams.
  

Frontend:
React, HTML5, CSS3, REST API Integration

Backend:
.NET Core, ASP.NET Core, RESTful APIs, Microservices, Entity Framework, JSON

Messaging& Integration:
Apache Kafka, Event-Driven Architecture, Kafka Producers/Consumers