Full Stack .Net Developer

TEKsystems; United States; Remote; USD 69,000 - 83,000; Full time

Benefits offered by this job

Remote work (Colorado residents)

Collaborative team

Job summary

TEKsystems is seeking a Senior Full Stack .NET Developer for a 100% remote role (Colorado residents). You will design and implement enterprise software across web and desktop platforms using C#, .NET 8/10, HTML, CSS, and JavaScript, with REST APIs and WPF MVVM.

Strong collaboration with stakeholders and agile teams is essential. The role supports modernization efforts and production systems, with an emphasis on quality, documentation, and timely delivery.

Qualifications

• 5+ years of enterprise C#/.NET development experience.
• Strong full stack web development with REST APIs.
• WPF desktop app development using MVVM and async patterns.
• Experience using AI-assisted development tools to boost productivity.
• Excellent communication and collaboration with stakeholders.

Responsibilities

• Design, develop, enhance, and support web and desktop applications.
• Build solutions using C#, .NET 8/10, and Microsoft technologies.
• Develop front-end with HTML, CSS, and JavaScript and REST APIs.
• Support and modernize WPF desktop applications.
• Maintain APIs and system integrations; troubleshoot defects.
• Participate in Agile ceremonies and sprint planning.
• Provide accurate work estimates and adhere to commitments.
• Perform code reviews and promote best practices.

Skills

C# / .NET

Full stack web development

WPF MVVM

AI-assisted development tools

Communication & collaboration

Tools

C#

NET 8 / NET 10

HTML

CSS

JavaScript

REST APIs

WPF

MVVM

Data Binding

Async programming

Agile/Scrum

AI-assisted tools (Copilot, ChatGPT)

Job description

Job Title: Senior Full Stack .NET Developer

Workplace Type: 100% Remote (Must Reside in Colorado)

Required Skills:

1. C# / .NET Development : 5+ years of hands-on experience developing enterprise applications using C# and modern .NET technologies. Candidates should have recent experience actively writing production code and be comfortable troubleshooting, enhancing, and maintaining complex business applications.

2. Full Stack Web Development (HTML, CSS, JavaScript, APIs): Strong experience developing both front-end and back-end components of web applications, including user interfaces, business logic, and integrations. Candidates should be comfortable building and consuming REST APIs and supporting applications across the full technology stack.

3. WPF Desktop Application Development: Experience developing and maintaining WPF applications using MVVM, data binding, state management, and asynchronous programming patterns. Candidates should be comfortable building responsive user interfaces and supporting desktop applications that interact with APIs, databases, and background processes.

4. Experience using modern AI-assisted development tools (GitHub Copilot, Microsoft Copilot, ChatGPT, or similar) to improve productivity, accelerate development, troubleshoot issues, and enhance code quality.

5. Communication, Collaboration & Adaptability: Proven ability to work independently while collaborating within a high-level development team. Candidates should possess strong communication skills, be comfortable working directly with technical and business stakeholders, and be able to quickly ramp up on existing systems and technologies.

About the Role

We're partnering with a mission-driven Colorado organization seeking an experience Full Stack .NET Developer to join a highly collaborative software development team. This role offers the opportunity to work across both modern web applications and established desktop solutions that support critical business operations throughout the organization.

The ideal candidate is a seasoned C#/.NET developer who enjoys solving complex challenges, contributing to modernization initiatives, and collaborating with experienced developers and business stakeholders. If you're looking for meaningful work, a strong team culture, and the chance to make a direct impact, this could be an excellent fit.

Responsibilities

• Design, develop, enhance, and support custom web and desktop applications
• Develop solutions using C#, .NET 8, .NET 10, and related Microsoft technologies
• Build and maintain front-end applications utilizing HTML, CSS, and JavaScript
• Support and enhance WPF desktop applications
• Develop, integrate, and maintain REST APIs and system integrations
• Troubleshoot and resolve application defects and performance concerns
• Participate in Agile ceremonies including sprint planning, standups, backlog refinement, and retrospectives
• Provide accurate work estimates and consistently deliver on sprint commitments
• Conduct code reviews and contribute to development best practices
• Collaborate closely with developers, analysts, architects, and business stakeholders
• Support application modernization while maintaining existing production systems
• Create and maintain technical documentation

Tools & Environment

• C#
• .NET 8 / .NET 10
• HTML
• CSS
• JavaScript
• REST APIs
• WPF
• MVVM
• Data Binding
• Asynchronous Programming
• Agile/Scrum
• GitHub Copilot, Microsoft Copilot, ChatGPT, or similar AI-assisted development tools

Competencies

• 5+ years of enterprise-level C#/.NET development experience
• Strong full stack web development expertise
• Experience developing and maintaining WPF desktop applications
• Ability to work independently and quickly learn existing systems
• Strong communication skills with both technical and non-technical stakeholders
• Demonstrated success working within Agile development environments
• Adaptable mindset with the ability to support both legacy and modern technologies
• Strong problem-solving and troubleshooting capabilities

Workplace Perks

• 100% Remote Opportunity (Colorado Residents Only)
• Join a highly experienced, collaborative development team
• Meaningful work supporting affordable housing and economic opportunity initiatives throughout Colorado
• Exposure to both modernization projects and enterprise-scale applications
• Two-step interview process
• Equipment provided (pickup required in downtown Denver)

We reserve the right to pay above or below the posted wage based on factors unrelated to sex, race, or any other protected classification.

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.This temporary role may be eligible for the following:

• Medical, dental & vision
• 401(k)/Roth
• Insurance (Basic/Supplemental Life & AD&D)
• Short and long-term disability
• Health & Dependent Care Spending Accounts (HSA & DCFSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

Job Type & Location

This is a Contract position based out of Denver, CO.

Pay and Benefits

The pay range for this position is $50.00 - $60.00/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 jobclassification and length of employment. Benefits are subject to change and may besubject to specific elections, plan, or program terms. If eligible, the benefitsavailable for this temporary role may include the following:Medical, dental & visionCritical Illness, Accident, and Hospital401(k) Retirement Plan Pre-tax and Roth post-tax contributions availableLife Insurance (Voluntary Life & AD&D for the employee and dependents)Short and long-term disabilityHealth Spending Account (HSA)Transportation benefitsEmployee Assistance ProgramTime Off/Leave (PTO, Vacation or Sick Leave)

Job Type & Location

This is a Contract position based out of Denver, CO.

Application Deadline

This position is anticipated to close on Oct 27, 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.