C# Developer jobs in Washington

.Net/ C# Developer with EDI X12 - Rate is $60/hr - Remote

Remote

•

Today

Must provide 2 Managerial references for this role Remote role - Must have X12 EDI AWS 8+ years software engineering experience with distributed, high-volume transaction-processing systems.Healthcare EDI/X12 exp, particularly 270/271 eligibility, Service Type Codes, and payer connectivity.Strong C#/.NET backend development, including async programming, performance tuning, resiliency, and automated testing.Experience with event-driven architectures and messaging, preferably RabbitMQ or equivalen

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Third Party, Contract

Depends on Experience

Application Full Stack Developer -- API C#, ASP.NET, .NET Core, MVC

Remote

•

Today

Dear Candidate, If below requirement suits you then please share your updated resume. New position: Application Developer/Architect Duration: 12 months 100% Remote C2C Rate: $60/hr Skills and Role: Design, develop, and support enterprise applications using Microsoft technologies and modern web frameworks. Work closely with business stakeholders to deliver secure, scalable, and high-performance solutions. Key Skills: C#, ASP.NET, .NET Core, MVCReact, JavaScript, jQuery, HTML, CSS, BootstrapSQL S

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Contract

60+

Senior Fullstack Developer (C#, AWS, Angular)

Remote or Hybrid in Cleveland, Ohio

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Today

Precision is seeking a Senior Full Stack Developer for a contract position supporting our Fortune 100 client. This fully remote role requires work during Eastern Time business hours and focuses on building and supporting software across the UI, backend, APIs, databases, and cloud. You will develop with C#/.NET and Angular while designing APIs and microservices. Strong AWS experience is essential, including DynamoDB, SQS, SNS, S3, Lambda, and Terraform. The role also includes technical documentat

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Contract

DOE

OpenLink Endur Developer / Specialist (.NET / C#)

Remote

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Today

Position OverviewWe are seeking an experienced OpenLink Endur Developer with a strong technical background in .NET / C# to design, develop, test, and maintain custom solutions within our Endur ETRM/CTRM platform. In this role, you will collaborate with business analysts, trade support, and risk teams to deliver robust custom OpenJVS/OpenComponents (.NET) scripts, plugins, report builders, and system integrations across energy and commodity trading desks. Key ResponsibilitiesDevelopment & Customi

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Contract

00+

Senior Fullstack Developer (C#, AWS, Angular)

Remote or Hybrid in Cleveland, Ohio

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Today

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Contract

DOE

Jr - Mid level C# .Net Full Stack developer IOT

Remote

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2d ago

Jr - Mid level C# .Net Full Stack developer IOT Client is unable to sponsor visa at this time, so looking for USC. Required 26 years full-stack development shipping production software React / TypeScript + .NET C# or Python backend IoT protocol experience (MQTT, AMQP) or edge software integration Software packaging: installers, containers, or update agents AI tools in daily dev (Cursor, Copilot, Claude Code) CI/CD familiarity (GitHub Actions or equivalent) Nice to Have Medical device soft

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Contract

Depends on Experience

Full Stack Developer / C# .NET / Vue / Azure / Remote

Remote

•

Today

A leading food services and facilities management organization is seeking a Full Stack Developer for a remote contract opportunity. This role will support application modernization initiatives and the migration of enterprise applications to Microsoft Azure, utilizing technologies including C#, .NET, Vue/Nuxt, SQL, and RESTful APIs to build and enhance business-critical solutions. What sets this opportunity apart is the chance to work on modernizing and rebuilding applications in a collaborative

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Contract

$45 - $75

AI Platform Engineer

Remote

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Today

Platform Engineer Agentic AI & Developer Platforms We are seeking an experienced Platform Engineer to join a high impact engineering team focused on building next generation AI powered developer platforms. This role will play a critical part in designing, developing, and operationalizing internal AI agent platforms, MCP servers, automation frameworks, and developer tooling that enable engineering teams to build and deploy software more effectively. The ideal candidate brings hands on experience

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Contract

Depends on Experience

.Net Developer - in person interview

Remote

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6d ago

Role: .Net Developer Location: 100% remote Duration: Long term We are looking for an experienced .NET/C# Developer with strong web services, Windows-based application development, and SQL development skills. The ideal candidate should be comfortable troubleshooting complex issues and working independently. Key Skills/experience required:.NET/C# developer with Services experience (RESTFUL, WCF, etc.).NET frameworksWindows based development (WPF, WinForms)SQL developmentAbility to troubleshoot and

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Third Party, Contract

50 - 55

Sr. Web Application Developer

Remote

•

2d ago

Job Title: Sr. Web Application Developer Location: Indianapolis, IN Type: Contract Compensation: $58 - $70 Work Model: Remote offsite Responsibilities Lead the architecture, design, and development of modern web applications across a diverse technology stack, including .NET/C#, Node.js, and front-end frameworks (React, Angular, Vue). Design and implement scalable, cloud-native solutions using microservices and serverless architectures. Establish and enforce engineering best practices, codin

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Contract

$57.65

Application Developer 1/2/3 (PCNs 87)

Remote or Anchorage, Alaska

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Today

Salary: $2,725.50 - $3,563.25 Biweekly Location : Anchorage, AK Job Type: Full Time Remote Employment: Flexible/Hybrid Job Number: 55689 Department: Fish & Game Division: Sport Fish Opening Date: 10/26/2026 Closing Date: 11/9/2026 5:00 PM Alaska Division: Sport Fish Position Open To: Alaska Residents Only Bargaining Unit: General Government Range: 18/20/22 Job Description This position is open to Alaska Residents only. Please check our residency definition to determine if you qualify. The Alask

Full-time

USD 2,725.50 - 3,563.25 per week

Application Developer - Public Safety and Justice Projects

Remote

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Today

Founded in 2001, Optima Global Solutions Inc., brings over 2 decades of experience and expertise in facilitating IT transformation within industries ranging from higher education and government to manufacturing and financial services. Sporting scalable and diverse business solutions expertise along with deep-domain based resourcing capabilities, Optima has a specialization in Automation and AI, Strategic Staffing and Custom Solutions Development, focusing on the core pillars of process, people,

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Contract

$80 - $90

C# Software Engineer

Everett, Washington

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Today

Job Title: C# Software Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: Secret Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Continental US * * * The Opportunity: CACI at looking for a C# software engineer to design, develop, and maintain software tools that keep aircraft safe and operational. Your work will directly impact the Navy's F/A-18 fleet readiness by enhancing maintenance detection software and anoma

Full-time

USD 66,700.00 - 133,300.00 per year

H1B CAP Hiring for 2027 for OPT / Stem OPT

Remote or Albany, New York

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Yesterday

Greeting from i-link Solutions Inc! We are looking to hire IT professionals for H1B filing for 2026-27. If you are interested, please reply to me at the earliest. Only the candidate stayed in Albany, NY, USA can apply Candidates with a US Master's Degree and 4+ years of experience, or those outside Albany, NY who are currently on a project and convertible can apply. Kindly share me the following details to move to the next step, along with an updated resume, Visa copy, ID Proof, Degree Certifica

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Contract

Depends on Experience

.Net Application Developer/Architect - Remote

Remote

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Today

Responsibilities: This role is 100% remote.Develop, test, deploy, and maintain web applications and APIs.Design and optimize databases, queries, and stored procedures.Build responsive user interfaces and scalable backend services.Integrate cloud, AI, and third-party solutions.Troubleshoot production issues and enhance application performance.Collaborate with business and technical teams throughout the development lifecycle.Additional Skills and Information: C#, ASP.NET, .NET Core, MVCReact, Java

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Contract, Third Party

$55

L&I IT Application Development - Senior/Specialist

Remote or Tumwater, Washington

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Today

Salary : $99,300.00 - $133,608.00 Annually Location : Thurston County - Tumwater, WA Job Type: Full Time - Permanent Remote Employment: Remote Optional Job Number: 2026-08592 Department: Dept. of Labor & Industries Division: Information Technology Opening Date: 10/23/2026 Closing Date: 11/8/2026 11:59 PM Pacific Salary Information: The high end of the salary range, Step M is typically a longevity step Description Our Mission: Keep Washington Safe and Working!Our Values: Customer Focus, One L&I,

Full-time

USD 99,300.00 - 133,608.00 per year

Ellucian Colleague Integrations Developer (100% Remote)

Remote

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Today

Senior Integration Developer, Student Applications for a contract opportunity in Texas. The desired candidate will have 8+ years of hands-on experience developing enterprise application and data integrations, with strong experience supporting Student Information Systems, financial aid platforms, and other higher education applications. The Senior Integration Developer will design, build, and maintain integrations across enterprise systems using technologies such as Oracle Integration Cloud (OIC)

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Third Party, Contract

Depends on Experience

Sr Developer

Remote or Cleveland, Ohio

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Today

job summary: For this contractor assignment, seeking Sr Software Developer with demonstrated success within large-scale IT projects. Full Stack developers will work in a fast paced, collaborative environment, with groups in both IT and business areas: designing, coding, and unit testing in a variety of technologies supporting UI, backend, API, and database and Cloud. You'll provide insights and contribute to decisions impacting various platforms. location: Telecommute job type: Contract salar

Contract

USD64 - USD74

Sr Developer

Remote or Cleveland, Ohio

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Today

Contract

USD64 - USD74

Sr Developer

Remote or Cleveland, Ohio

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Today

Contract

USD64 - USD74

C# Developer jobs in Washington, USA