.Net Back End Jobs in Seattle, WA

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Staff Software Engineer - Remote

Milliman IntelliScript

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Remote

Full-time

What We Do Milliman IntelliScript is a group of a few hundred experts in fields ranging from actuarial science to information technology to clinical practice. Together, we develop and deploy category-defining, data-driven, software-as-a-service (SaaS) products for a broad spectrum of insurance, health IT and life sciences clients. We are a business unit within Milliman, Inc., a respected consultancy with offices around the world. Candidates who have their pick of jobs are drawn to IntelliScript
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Posted 60+ days ago | Updated 19 days ago

.Net Developer

4 Consulting Inc

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Remote

Full-time

Who we are! At 4Ci our mission is to build long term relationships, based on trust, integrity, and knowledge with all our employees and business affiliates. 4Ci has been in business for 20 years and has employees working on mission critical projects nationwide. We provide computer programming, testing, and system design services to develop and maintain multi-year, multi-million-dollar mission critical applications for the US Government. Examples of such applications are Medicaid MMIS systems, He
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Posted 57 days ago | Updated 26 days ago

Software Engineer - IT Payments

Costco Wholesale Corporation

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Issaquah, Washington, USA

Full-time

Costco IT is responsible for the technical future of Costco Wholesale, the third largest retailer in the world with wholesale operations in fourteen countries. Despite our size and explosive international expansion, we continue to provide a family, employee centric atmosphere in which our employees thrive and succeed. This is an environment unlike anything in the high-tech world and the secret of Costco's success is its culture. The value Costco puts on its employees is well documented in artic
Posted 2 days ago | Updated 1 hour ago

Senior .NET Developer

Kforce Technology Staffing

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Remote or Boston, Massachusetts, USA

Contract

RESPONSIBILITIES: Kforce has a client in Boston, MA that is seeking a seasoned Senior .NET Developer with 8+ years of experience in full-stack development. This role involves designing and building scalable web applications and APIs, working across front-end, back-end, and database layers in a cross-functional team. Responsibilities: * Senior .NET Developer will develop and maintain web applications and services * Collaborate on architecture, design, and code reviews * Translate business requir
Posted 9 days ago | Updated 1 day ago

.Net Developer

4 Consulting Inc

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Remote or Texas City, Texas, USA

Full-time

Who we are! At 4Ci our mission is to build long term relationships, based on trust, integrity, and knowledge with all our employees and business affiliates. 4Ci has been in business for 20 years and has employees working on mission critical projects nationwide. We provide computer programming, testing, and system design services to develop and maintain multi-year, multi-million-dollar mission critical applications for the US Government. Examples of such applications are Medicaid MMIS systems, He
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Posted 60+ days ago | Updated 26 days ago

Senior Software Engineer (Interoperability FHIR/HL7)

ConsultNet, LLC

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Remote or Dallas, Texas, USA

Full-time

Senior Software Engineer (Interoperability) Remote (MST, Central, or Eastern Time Zone) 6-12-month Contract or Contract to Hire Pay Rate: $75-80/hr A technology-first organization delivering secure, scalable software solutions to streamline the exchange and management of healthcare records. With a mission to reduce administrative friction in regulated environments, they help modernize how critical data is accessed, shared, and stored across health systems. Job Description: This role centers on
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Posted 2 days ago | Updated 1 hour ago

APPLICATION DEVELOPER/ANALYST

University of Washington

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Seattle, Washington, USA

Full-time

Although open until filled, priority application date is July 18th, 2025. As a UW employee, you have a unique opportunity to change lives on our campuses, in our state and around the world. UW employees offer their boundless energy, creative problem-solving skills, and dedication to build stronger minds and a healthier world. UW faculty and staff also enjoy outstanding benefits, professional growth opportunities and unique resources in an environment noted for diversity, intellectual excitement
Posted 28 days ago | Updated 1 hour ago

Senior Software Engineer

GNRSystems

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Remote

Contract

We are seeking a highly experienced and self-motivated Senior Software Engineer for a remote W2 position. The ideal candidate will have a strong background in full-stack development, software architecture, and cloud technologies, with the ability to design and build scalable enterprise applications in a fast-paced Agile environment. Key Responsibilities:Design, develop, test, and deploy high-quality software solutions. Work across the full software stack: backend services, APIs, databases, and f
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Posted 12 days ago

Sr. Software Engineer

First American Financial Corporation

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Remote or Santa Rosa, California, USA

Full-time

Who We Are Join a team that puts its People First! As a member of First American's family of companies, First American Home Warranty offers a wide range of home warranty products and services to home sellers, buyers and agents. Since 1889, First American (NYSE: FAF) has held an unwavering belief in its people. They are passionate about what they do, and we are equally passionate about fostering an environment where all feel welcome, supported, and empowered to be innovative and reach their full
Posted 11 days ago | Updated 1 hour ago

Senior Software Engineer

Eliassen Group

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Anywhere, US

Contract

Description: **100% Remote** As a Senior Software Engineer, you have a proven track record of success delivering projects of critical importance. You are comfortable with both greenfield development (including deployment pipelines) and working in existing microservices and monoliths. You write code that follows best practices, is maintainable, and is tested. You break down product requirements into units of work that can begin delivering value quickly and can easily be iterated upon. If you a
Posted 5 days ago | Updated 1 hour ago

Software Engineer - Digital Site Development

Costco Wholesale Corporation

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Issaquah, Washington, USA

Full-time

Costco IT is responsible for the technical future of Costco Wholesale, the third largest retailer in the world with wholesale operations in fourteen countries. Despite our size and explosive international expansion, we continue to provide a family, employee centric atmosphere in which our employees thrive and succeed. This is an environment unlike anything in the high-tech world and the secret of Costco's success is its culture. The value Costco puts on its employees is well documented in artic
Posted 60+ days ago | Updated 1 hour ago

Dotnet Developer

Randstad - Torc

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Remote

Contract

We are looking for a highly skilled Full Stack .NET Developer for a full-time contract. This is a 100% remote role with flexibility to collaborate across Central Time (CT) hours. What You ll Do Design, develop, and optimize web applications using .NET (C#) for the backend and modern frontend technologies.Collaborate with product managers, designers, and other engineers to build scalable, efficient solutions.Implement best practices in software architecture, automated testing, and performance opt
Posted 60+ days ago | Updated 11 days ago

Sr. C#/.NET Integration Engineer (Apache NiFi/FHIR API's)

ConsultNet, LLC

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Remote or Dallas, Texas, USA

Full-time

Sr. C#/.NET Integration Engineer (Apache NiFi/FHIR API's) Remote (MST, Central or Eastern Time Zone) 6-12-month Contract or Contract to Hire Pay Rate: 75-80/hr A rapidly growing technology-driven organization focused on streamlining how sensitive records are managed, processed, and shared. They specialize in transforming manual, compliance-heavy workflows into secure, efficient digital solutions-helping clients improve access, accuracy, and overall operational performance across regulated env
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Posted 27 days ago | Updated 1 hour ago

Software Engineer, Infrastructure - Platform (Compute)

Coinbase

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Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 35 days ago | Updated 1 hour ago

Full Stack Software Engineer (Front-End)

LMI Government Consulting (Logistics Management In

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Remote

Contract

Overview Remote (U.S. Based) | Some Travel Required LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed. Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficie
Posted 13 days ago | Updated 10 hours ago

.Net Developer

Solugenix Corporation

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Remote or Los Angeles, California, USA

Full-time, Contract

.Net Developer Los Angeles, CA (Remote/Onsite) 6-Month contract to hire Job ID 25-09723 Solugenix is assisting a client, a health insurance company, in their search for a .Net Developer. This is a 6-month contract to hire opportunity based out of Los Angeles, CA (Remote/Onsite).The .NET Developer II designs and develops .NET Web applications, web services, and windows applications using C#.NET on Visual studio .NET 2010 and 2013, JavaScript, AJAX and is under the supervision of a senior or lead
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Posted 3 days ago | Updated 8 hours ago

Staff Software Engineer, Infrastructure (Compute)

Coinbase

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Remote

Full-time

Ready to be pushed beyond what you think you're capable of? At Coinbase, our mission is to increase economic freedom in the world. It's a massive, ambitious opportunity that demands the best of us, every day, as we build the emerging onchain platform - and with it, the future global financial system. To achieve our mission, we're seeking a very specific candidate. We want someone who is passionate about our mission and who believes in the power of crypto and blockchain technology to update the
Posted 56 days ago | Updated 1 hour ago

Key .NET Engineer with Azure

EPAM Systems

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Remote

Full-time

Are you a skilled .NET Engineer with a passion for building robust and scalable backend systems? Join us and take part in creating a central hub for one of the world's leading oil producers. This platform will provide real-time access and status updates on capital projects, catering to a diverse range of users, including executives, middle management, GPE and project stakeholders. If you're passionate about innovation, we invite you to apply and become part of the EPAM team! To discover more
Posted 60+ days ago | Updated 4 days ago

Staff Software Development Engineer (Full Stack Java/Node)

CVS Health

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Remote or Scottsdale, Arizona, USA

Full-time

At CVS Health, we're building a world of health around every consumer and surrounding ourselves with dedicated colleagues who are passionate about transforming health care. As the nation's leading health solutions company, we reach millions of Americans through our local presence, digital channels and more than 300,000 purpose-driven colleagues - caring for people where, when and how they choose in a way that is uniquely more connected, more convenient and more compassionate. And we do it all w
Posted 28 days ago | Updated 1 hour ago

Senior Software Engineer - .NET

Guardian Life Insurance Company

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Remote or Holmdel, New Jersey, USA

Full-time

We are actively seeking a proactive, creative Senior Software Engineer who will be responsible for architectural design and implementation of Guardian's next-generation web self-service platforms APIs using .Net Core, C#. You will: Design, develop, and deploy high-volume, high-usage self-service web portals APIs, utilizing .Net Core, C#.Collaborate with Technical Teams, Technical Manager, Project Manager and subject matter experts from businesses and work closely with SMEs to understand, plan a
Posted 54 days ago | Updated 1 hour ago