Application Support Engineer & NET Developer

Rysun Labs (formerly KCS – Krish Compusoft Services) is an AI, Data & Digital innovation partner of choice for enterprises, globally. Rysun guides and accelerates the Data & AI strategy and Digital Transformation programs for Fortune 2000 enterprises and product startups to shape remarkable
customer experiences and intelligent operations. The team delivers innovative, specialized solutions that help High-tech, Retail & Ecommerce to outperform competition and lead the change in their industry.
Rysun partners with Microsoft, Google and AWS to bring the best of enterprise technology to its customers. Rysun believes in quality-first and is CMMI Level 5, ISO 9001 & 27001 certified. The team has a growth mindset fueled by a strong culture of collaboration that unifies its global teams across India, USA, South Africa (a proud Level 2 B-BBEE Contributor), and UK.

We are looking for an Application Support Engineer / .NET + React Developer to join our engineering team in Tampa, Florida. This is a Work from Office role combining application support, backend development, troubleshooting, business analysis, and client engagement.
The primary responsibility will be supporting multiple business-critical applications, while also contributing to the development and enhancement of designated applications. The ideal candidate should be strong in C#, .NET, SQL Server, REST APIs, and backend troubleshooting, while also possessing excellent communication and client-facing skills.
We are looking for someone who can understand a business problem, investigate the technical root cause, communicate effectively with stakeholders, and deliver a sustainable solution.

Job Title: Application Support Engineer / .NET Developer
Location: Tampa, Florida
Work Model: On-site
Experience: 1–4 Years
Employment Type: Intern / Associate

Key Responsibilities

• Application Support & Troubleshooting
• Provide technical support for multiple applications across UAT, and production environments.
• Investigate and resolve application incidents, defects, and service requests.
• Troubleshoot issues across .NET applications, APIs, databases, integrations, and application logs.
• Perform root-cause analysis and implement permanent fixes or appropriate workarounds.
• Monitor recurring issues and proactively identify opportunities for application improvement.
• Support production releases, deployments, and post-release validation.
• Prioritize and manage multiple incidents based on business impact and severity.
• Maintain technical documentation and knowledge-based articles

Backend Development

• Design, develop, test, and maintain applications using C# and .NET / .NET Core.
• Develop and maintain RESTful APIs and backend services.
• Implement business logic, integrations, and application enhancements.
• Write clean, maintainable, scalable, and testable code.
• Participate in code reviews, unit testing, debugging, and application modernization.
• Collaborate with senior engineers, QA, DevOps, and other technical teams.

SQL & Database

• Write and troubleshoot complex SQL Server queries.
• Develop and maintain stored procedures, views, and database operations.
• Analyze data to troubleshoot production issues and identify root causes.
• Understand relational database concepts, transactions, indexing, and basic query optimization.

Business Analysis & Client Engagement

• Work directly with clients and business users to understand application issues and requirements.
• Translate business needs into technical requirements, user stories, and acceptance criteria.
• Participate in requirement-gathering sessions, UAT, application demonstrations, and client meetings.
• Communicate technical issues and solutions clearly to non-technical stakeholders.
• Take ownership of issues from initial investigation through resolution.

Required Technical Skills
Must Have:

• C# and .NET / .NET Core
• ASP.NET Core / Web API
• REST APIs
• Strong Microsoft SQL Server / SQL skills
• Object-Oriented Programming
• Entity Framework / LINQ
• Debugging and troubleshooting
• Git and modern development practices
• Basic understanding of CI/CD and cloud environments
• Excellent verbal and written communication

Supporting Skills

• Basic React / JavaScript knowledge
• JSON / XML
• Postman or similar API testing tools
• Application logging and monitoring
• Azure DevOps, Jira, ServiceNow, or similar tools

Cloud Certification

• Candidates must hold at least one recognized cloud certification, such as:
• Microsoft Azure Fundamentals (AZ-900) or higher
• Azure Developer Associate (AZ-204)
• AWS Certified Cloud Practitioner or higher
• AWS Developer Associate
• Google Cloud certification
• Hands-on Azure or AWS experience is strongly preferred.

Qualifications

• Bachelor’s degree in computer science, Information Technology, Software Engineering, or a related field.
• 1–4 years of professional experience in software development, application support, or a combination of both.
• Strong backend development and SQL fundamentals.
• Experience troubleshooting production applications and APIs.
• Strong analytical and problem-solving skills.
• Excellent communication and client-facing skills.
• Comfortable working with multiple applications and priorities.
• Willingness to work on-site in Tampa, Florida.

Ideal Candidate

• The ideal candidate is someone who can go beyond simply resolving tickets. They should be able to understand:
• Business Problem → Application → API → .NET → SQL → Integration → Root Cause → Solution
• This position is well suited for an early-career engineer who wants to build strong experience across backend engineering, production support, client engagement, and business analysis.