Senior Backend .NET Engineer

Kforce Inc; Lakeland (FL); On-site; USD 105,000 - 145,000; Full time

Job summary

Kforce Inc. in Lakeland, FL, is seeking a Senior Backend .NET Engineer to design and implement backend architecture using .NET Framework/.NET 8 and C#. You will develop RESTful APIs, microservices, and data solutions across distributed systems.

Responsibilities include optimizing performance, collaborating with FE engineers, and mentoring junior developers while adhering to TDD and CI/CD practices. Strong SQL Server and PostgreSQL experience preferred.

Qualifications

• Bachelor's degree or equivalent work experience in CS/SE.
• 5+ years of backend development with .NET technologies.
• Strong proficiency in C#, .NET Core/.NET 8, and Web API.
• Expertise in SQL Server; PostgreSQL experience is a plus.
• Solid understanding of OOP, design patterns, and SOLID.
• Familiarity with Agile/Kanban methodologies.
• Excellent problem-solving and communication skills.

Responsibilities

• Design and implement backend architecture using .NET Framework/.NET 8 and C#.
• Develop and maintain RESTful APIs and microservices for web and mobile apps.
• Optimize performance, scalability, and security across distributed systems.
• Collaborate with front-end engineers to integrate server-side logic.
• Implement database solutions using SQL Server and PostgreSQL.
• Participate in code reviews, enforce best practices, and mentor juniors.
• Troubleshoot production issues and provide timely resolutions.
• Ensure security standards and data protection compliance.
• Contribute to CI/CD pipelines and automated deployments.
• Stay current with emerging .NET tech and cloud-native trends.
• Follow a TDD methodology.

Skills

C#

.NET Core/.NET 8

RESTful APIs

Microservices

SQL Server

PostgreSQL

Web API

TDD

Agile/Kanban

Education

Bachelor's degree in Computer Science, Software Engineering, or related field

Tools

PostgreSQL

SQL Server

Job description

Responsibilities

Kforce has a client that is seeking a Senior Backend .NET Engineer in Lakeland, FL. Duties Include:

• Design and implement backend architecture using .NET Framework/.NET 8 and C#
• Develop and maintain RESTful APIs and microservices for web and mobile applications
• Optimize application performance, scalability, and security across distributed systems
• Collaborate with FE engineers to integrate user-facing elements with server-side logic
• Implement database solutions (SQL Server, PostgreSQL) and ensure efficient query performance
• Participate in code reviews, enforce best practices, and mentor junior developers
• Troubleshoot production issues and provide timely resolutions
• Ensure compliance with security standards and data protection protocols
• Contribute to CI/CD pipelines and automated deployment processes
• Stay current with emerging .NET technologies and cloud-native development trends
• Follow a TDD methodology

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or related field or equivalent work experience
• 5+ years of professional experience in backend development with .NET technologies
• Strong proficiency in C#, .NET Core/.NET 8, and Web API
• Expertise in SQL Server and relational database design; Experience with PostgreSQL is a plus
• Solid understanding of object-oriented programming, design patterns, and SOLID principles
• Familiarity with Agile/Kanban methodologies
• Excellent problem-solving and communication skills

The pay range is the lowest to highest compensation we reasonably in good faith believe we would pay at posting for this role. We may ultimately pay more or less than this range. Employee pay is based on factors like relevant education, qualifications, certifications, experience, skills, seniority, location, performance, union contract and business needs. This range may be modified in the future.

We offer comprehensive benefits including medical/dental/vision insurance, HSA, FSA, 401(k), and life, disability & ADD insurance to eligible employees.

Salaried personnel receive paid time off. Hourly employees are not eligible for paid time off unless required by law. Hourly employees on a Service Contract Act project are eligible for paid sick leave.

Note: Pay is not considered compensation until it is earned, vested and determinable. The amount and availability of any compensation remains in Kforce's sole discretion unless and until paid and may be modified in its discretion consistent with the law.

This job is not eligible for bonuses, incentives or commissions.

Kforce is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.