Sr. .NET Developer

About the role

.NET Developer

Must be able to work W2 - Cannot provide Sponsorship - No C2C

100% Remote

This role leads the development of key applications, including a mission-critical claiming system for Medicaid and Medicare that serves as the central platform for tracking and managing claims. You will design, build, and optimize secure, scalable, and maintainable solutions using C#, .NET 8+/ASP.NET Core, and modern cloud and DevOps practices. The position requires strong technical leadership, hands-on development expertise, and the ability to drive architecture and technical strategy in a highly collaborative, fully remote environment.

Responsibilities

+ Lead end-to-end design and development of core applications, with a focus on a Medicaid and Medicare claiming system used to track and manage claims data.

+ Develop high-quality, maintainable, and testable code using C#, .NET 8+/ASP.NET Core, JavaScript/TypeScript, HTML, and CSS.

+ Design, implement, and optimize SQL Server databases, including schema design, query optimization, and performance tuning.

+ Build and maintain RESTful APIs and microservices that support secure, scalable, and reliable application functionality.

+ Implement and uphold secure application design principles, ensuring protection of sensitive data and adherence to security best practices.

+ Leverage Azure cloud services and Azure DevOps to design and maintain CI/CD pipelines, automate deployments, and improve delivery efficiency.

+ Use Git and related tooling to manage source control, branching strategies, and code reviews.

+ Containerize and orchestrate services using Docker and Kubernetes to support scalable, cloud-native architectures.

+ Apply event-driven architecture patterns where appropriate to improve system responsiveness, scalability, and decoupling.

+ Provide Senior technical leadership by mentoring developers, reviewing code, and enforcing coding standards and best practices.

+ Collaborate closely with business and executive stakeholders to understand requirements, communicate technical solutions, and align technology strategy with business goals.

+ Drive continuous improvement in application performance, reliability, and scalability through monitoring, refactoring, and architectural enhancements.

+ Contribute to and help define the overall architecture and technical roadmap for the applications under your responsibility.

+ Implement automated testing and DevOps practices to improve software quality, reduce defects, and streamline releases.

+ Ensure project milestones and delivery commitments are met by effectively estimating effort, managing priorities, and coordinating with cross-functional teams.

Essential Skills

+ Approximately 12+ years of professional software development experience.

+ At least 10+ years of hands-on experience with C# and .NET/.NET Core.

+ Extensive experience developing applications with .NET 8+/ASP.NET Core and ASP.NET Core MVC.

+ Strong proficiency in building RESTful APIs and integrating them into enterprise applications.

+ Advanced experience with SQL Server, including database design, query optimization, and performance tuning.

+ Hands-on experience with Entity Framework for data access and ORM.

+ Proficiency with JavaScript/TypeScript, HTML, and CSS for web application development.

+ Experience using Git for source control in a collaborative development environment.

+ Practical experience with Azure DevOps or similar CI/CD platforms to support continuous integration and delivery.

+ Proven experience providing Senior technical leadership, mentoring developers, and enforcing coding standards and technology strategy.

+ Ability to communicate effectively with technical teams, business stakeholders, and executive leaders.

+ Strong problem-solving skills with the ability to diagnose complex issues and propose effective solutions.

+ Bachelors degree in Computer Science, Software Engineering, Information Systems, or a related field.

Additional Skills and Qualifications

+ Experience with Microsoft Azure cloud services for hosting, scaling, and managing applications.

+ Experience designing and working with microservices architectures.

+ Experience with containerization technologies such as Docker and orchestration using Kubernetes.

+ Familiarity with modern JavaScript frameworks such as Angular, React, or Vue.

+ Experience implementing automated testing frameworks and integrating tests into CI/CD pipelines.

+ Experience applying DevOps practices to improve deployment frequency, stability, and feedback loops.

+ Experience leading development teams and driving technical initiatives across multiple projects.

+ Knowledge of event-driven architectures and their application in distributed systems.

+ background in secure application design, including authentication, authorization, and data protection best practices.

+ Comfort working in a contract-to-hire engagement structure.

Work Environment

This is a 100% remote position based in the United States, with work primarily conducted from a home office environment. Collaboration takes place through online communication and project management tools, supported by Azure DevOps and Git-based workflows. The technical stack centers on C#, .NET 8+/ASP.NET Core, SQL Server, Entity Framework, REST APIs, Azure cloud services, Docker, Kubernetes, and CI/CD pipelines. The role operates in a professional, outcomes-focused setting where engineers are expected to manage their time effectively, participate in virtual meetings, and occasionally attend an in-person final interview at a location coordinated near their local area. Dress expectations are standard professional casual for any video meetings or in-person interactions.

Job Type & Location

This is a Contract to Hire position based out of Charlotte, NC.

Pay and Benefits

The pay range for this position is $55.00 - $64.00/hr.

Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: Medical, dental & vision Critical Illness, Accident, and Hospital 401(k) Retirement Plan Pre-tax and Roth post-tax contributions available Life Insurance (Voluntary Life & AD&D for the employee and dependents) Short and long-term disability Health Spending Account (HSA) Transportation benefits Employee Assistance Program Time Off/Leave (PTO, Vacation or Sick Leave)

Job Type & Location

This is a Contract to Hire position based out of Charlotte, NC.

Application Deadline

This position is anticipated to close on Nov 3, 2026.

Workplace Type

This is a fully remote position.

About TEKsystems

We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

Were a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. Were a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. Were strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. Were building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.

Posting text as published by TEKsystems.

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senior From the job title

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Location as listed

Charlotte, NC

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