C# Jobs in Washington

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C#.NET API Developer

TriCom Technical Services

•

Remote

Contract

C#.NET API Developer Summary This C#.NET API Developer will focus on developing financial applications, creating workflows, and API integration. Responsibilities Support the company's financial systems.Develop Web-based solutions for internal customers business needs using C#/MVC.NET and MS SQL.Develop methods and processes to interact with various Cloud-based APIs using SOAP and RESTful APIs.Develop and maintain data synchronization between various systems within and between the company and o
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Posted 10 days ago

.Net, C#, C++ Lead Engineer

Photon

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Remote

Contract

Greetings everyone, I hope you are staying safe. We are hiring a .Net, C#, C++ Lead Engineer to join our Digital Engineering team. Who are we? For the past 20 years, we have powered many Digital Experiences for the Fortune 500. Since 1999, we have grown from a few people to more than 4000 team members across the globe that are engaged in various Digital Modernization. For a brief 1 minute video about us, you can check ;/u> Job Title: .Net, C#, C++ Lead Engineer Location: Remote Job Description:
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Posted 45 days ago | Updated 16 days ago

C# Software Developer

Zachary Piper Solutions, LLC

•

Remote

Full-time

Piper Companies is seeking a C# Software Developer to join a leading shipping and logistics organization. The C# Software Developer will work on backend development, automate workflows, and assist in designing cloud-based applications, with an emphasis on data. Responsibilities of the C# Software Developer include: Lead the design, development, testing, and deployment of .NET C# applications. Architect complex data structures for rate audits of parcel carrier invoice files. Design, develop, an
Posted 42 days ago | Updated 17 days ago

*C# Developer with Strong SQL Development experience (Experience working in Hedge Fund background)*

Kellton

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Remote

Contract

Kellton Tech is a full-service software development company, offering end-to-end IT solutions, strategic technology consulting and product development services in Web, SMAC (Social, Mobile, Analytics, Cloud), ERP-BPM, and IoT space Our methodology of inventing infinite possibilities with technology helps us develop best in-class and cost effective solutions for our clients. Currently Kellton Tech is looking for talented resources for one of our listed client. Below are the position details: Po
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Posted 60+ days ago | Updated 23 days ago

Software Engineer II (Python or C#/.Net) Remote

ConsultNet, LLC

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Remote or Birmingham, Alabama, USA

Full-time

Software Engineer II (Python or C#/.Net) Remote (EST or CST) 8 month contract Pay Rate: $50.00 to $52.00 per hr. We're looking for a hands-on Software Engineer II to support a major migration from a legacy system to a modern enterprise data platform. This role is part of an ongoing transformation project that began in early 2025. You'll help accelerate development by contributing to backend services and high-performance data pipelines in a collaborative Agile environment. Key Responsibilities De
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Posted 43 days ago | Updated 8 hours ago

QA Automation Engineer (C#, Selenium)

People Force Consulting Inc

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Remote

Contract

Role - Automation Tester Duration: This is 3 months Contract to Hire Location Fully Remote Key Skills: C#, Selenium, Advanced Automation Consult with client, understand the QA ecosystem and define automation charter and frameworks.Design, build and maintain automation frameworks.Enable the automation teams to design, develop and maintain automation scripts, automate API testing based on project needs and integrate the automation suite in the CI Pipeline.Should handle client and team with resp
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Posted 35 days ago | Updated 14 hours ago

C# .NET Developer

Sun Technologies,Inc.

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Remote

Contract

Job Title: C# .NET Developer Duration: up to 6 months contract (with the possibility of extension) Location: Remote Work Pay Range: $90.58 per hour on W2 Featured Benefits: Medical Insurance in compliance with the ACA401(k)Sick leave in compliance with applicable state, federal, and local laws Job Description: The successful candidate will be responsible for the development, configuration, management, and maintenance of these applications, ensuring seamless functionality and optimal performanc
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Posted 60+ days ago | Updated 8 days ago

Homes.com - Senior Software Engineer (C#/.NET)

Costar Group

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Arlington, Virginia, USA

Full-time

Homes.com - Senior Software Engineer (C#/.NET) Job Description CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index and the NASDAQ 100, CoStar Group is on a mission to digitize the world's real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives. Homes.com is already one of the fastest growing real estat
Posted 5 days ago | Updated 8 hours ago

Senior Software Engineer (.NET & C#)

Accenture LLP

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Washington, District of Columbia, USA

Full-time

At Accenture Federal Services, nothing matters more than helping the US federal government make the nation stronger and safer and life better for people. Our 13,000+ people are united in a shared purpose to pursue the limitless potential of technology and ingenuity for clients across defense, national security, public safety, civilian, and military health organizations. Join Accenture Federal Services, a technology company and part of global Accenture, to do work that matters in a collaborative
Posted 50 days ago | Updated 8 hours ago

Software Engineer (C#), Level 1

Parsons Services Company

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Maryland, USA

Full-time

In a world of possibilities, pursue one with endless opportunities. Imagine Next! When it comes to what you want in your career, if you can imagine it, you can do it at Parsons. Imagine a career working with exceptional people sharing a common quest. Imagine a workplace where you can be yourself. Where you can thrive. Where you can find your next, right now. We've got what you're looking for. Job Description: Parsons is looking for a Software Engineer (C#), Level 1 tosupport efforts based in
Posted 60+ days ago | Updated 8 hours ago

Early in Career Windows Software Engineer (C++, C#)

Rockwell Automation

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Remote or Phoenix, Arizona, USA

Full-time

Rockwell Automation is a global technology leader focused on helping the world's manufacturers be more productive, sustainable, and agile. With more than 28,000 employees who make the world better every day, we know we have something special. Behind our customers - amazing companies that help feed the world, provide life-saving medicine on a global scale, and focus on clean water and green mobility - our people are energized problem solvers that take pride in how the work we do changes the world
Posted 11 days ago | Updated 8 hours ago

Commodities Application Developer (C#, React, TypeScript) - AVP - Houston (Hybrid)

Citi

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Remote or Houston, Texas, USA

Full-time

The role is for a C# developer who will be working within a small team on Commodities Marking and Market Discovery Platform used by traders across the regions. We offer the opportunity to grow professionally, learn new technologies and gain business knowledge. Responsibilities: Develop the Platform using C# with an opportunity to learn React during WPF to React migrationWork directly with quants and traders to specify requirements and own deliveries and 3rd line support to provide daily communi
Posted 18 days ago | Updated 8 hours ago

Full Stack Developer (C# / .Net / JS / SQL / AWS)

Cymertek Corporation

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Tysons, Virginia, USA

Full-time

Full Stack Developer (C# / .Net / JS / SQL / AWS) LOCATION Tysons, VA 22182 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a skilled and versatile Full Stack Developer to join our team, specializing in C#, .NET, JavaScript, SQL, and AWS. In this role, you will be responsible for building and maintaining robust, scalable applications across both the front-end and back-end. You will collaborate closely with cross-functional te
Posted 60+ days ago | Updated 8 hours ago

Full Stack Developer (C# / .Net / JS / SQL / AWS)

Cymertek Corporation

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Reston, Virginia, USA

Full-time

Full Stack Developer (C# / .Net / JS / SQL / AWS) LOCATION Reston, VA 20190 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a skilled and versatile Full Stack Developer to join our team, specializing in C#, .NET, JavaScript, SQL, and AWS. In this role, you will be responsible for building and maintaining robust, scalable applications across both the front-end and back-end. You will collaborate closely with cross-functional te
Posted 60+ days ago | Updated 8 hours ago

Full Stack Developer (C# / .Net / JS / SQL / AWS)

Cymertek Corporation

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Chantilly, Virginia, USA

Full-time

Full Stack Developer (C# / .Net / JS / SQL / AWS) LOCATION Chantilly, VA 20151 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a skilled and versatile Full Stack Developer to join our team, specializing in C#, .NET, JavaScript, SQL, and AWS. In this role, you will be responsible for building and maintaining robust, scalable applications across both the front-end and back-end. You will collaborate closely with cross-functional
Posted 60+ days ago | Updated 8 hours ago

Full Stack Developer (C# / .Net / JS / SQL / AWS)

Cymertek Corporation

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Annapolis, Maryland, USA

Full-time

Full Stack Developer (C# / .Net / JS / SQL / AWS) LOCATION Annapolis Junction, MD 20701 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are looking for a skilled and versatile Full Stack Developer to join our team, specializing in C#, .NET, JavaScript, SQL, and AWS. In this role, you will be responsible for building and maintaining robust, scalable applications across both the front-end and back-end. You will collaborate closely with cross-f
Posted 60+ days ago | Updated 8 hours ago

Sr. Software Developer - C#/WPF for UI/UX Development

Esri

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Remote

Full-time

Overview This is a great opportunity to join a fast-paced agile team that works with the latest technologies and patterns, asynchronous programming, and MVVM to design and develop next-gen Esri software. We are focused on designing and developing solutions for working with raster and imagery in ArcGIS Pro. Our tools support complex real-life workflows in 2D & 3D for raster / image processing and analysis. If you are excited about user interaction and user interface development, then join our cr
Posted 60+ days ago | Updated 8 hours ago

Senior Software Engineering (RPA - Automation Anywhere 360 & C# .NET)

Mastercard

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Remote or O'Fallon, Missouri, USA

Full-time

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest po
Posted 60+ days ago | Updated 8 hours ago

PowerBuilder Developer - Hybrid

The Dignify Solutions, LLC

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Columbia, Maryland, USA

Contract, Third Party

Technical Skills & Qualifications: 5-10 years of hands-on experience developing and maintaining applications in PowerBuilder (versions 9.x through 2019 R3 or later). Strong proficiency in C++ and C# with experience migrating legacy systems to modern architectures. Solid understanding of client-server application development, database interaction, and backend business logic implementation. Extensive experience working with relational databases (e.g., Oracle, SQL Server, Sybase), including SQL de
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Posted 1 day ago | Updated moments ago

Senior Product Engineer (LLMs/AI Agents)

Jobot

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Washington, District of Columbia, USA

Full-time

100% remote role working at a Series A AI startup! This Jobot Job is hosted by: Brandon Bays Are you a fit? Easy Apply now by clicking the "Apply Now" button and sending us your resume. Salary: $175,000 - $220,000 per year A bit about us: Location: 100% Remote Compensation: $175-220K base + equity Employment Type: Full-time We're working with a Series A LegalTech AI startup that's making major strides in modernizing enterprise law firms' deal processes through powerful backend infrastructur
Posted 1 day ago | Updated moments ago