Top C# Jobs in Seattle, WA

Design, implement, and maintain real-time data acquisition and processing systems for high-throughput sensor and time-series data. Develop native and web/CLI applications, interfaces to DAQ hardware, streaming APIs, visualization tools, and CI/CD/infrastructure. Provide technical leadership, engage stakeholders, and own features from prototype to production.

As a Software Engineer, you will design, develop, and deliver high-quality software, contribute to code reviews, monitor application performance, and ensure maintainability and consistency across products.

Lead C++ developer to port a large compiler/interpreter codebase from x86 to x64, integrate with Office products, review and refactor code, implement high-quality unit-tested fixes, collaborate with US/India teams, and drive technical solutions and tooling improvements.

Develop and maintain C#/.NET (or Java) applications, write SQL, and work with telemetry and big-data tools (Hadoop, Pig, Hive). Leverage Microsoft technologies to deliver enterprise IT solutions.

Looking for mid to senior level .NET/C# developers with SharePoint experience to enhance customer experience through new functionality. Candidates will document business requirements and develop application design documentation.

Seeking an experienced AngularJS and C# developer to create a data dashboarding site with reusable MVC code and templating frameworks.

The role involves developing a data dashboarding site using AngularJS, D3, and C#, focusing on creating reusable client-side MVC code with templating frameworks.

The role involves software development with a focus on T SQL programming and development using SQL Server and C#.

Looking for an SQL and C# developer with 6 years of software development experience, proficient in T SQL programming and development, and strong in C#.

As a Software Engineer for Starlink, you will develop and support real-time software for satellites and gateways, enhancing broadband access globally.

Develop and maintain C# applications using ASP.NET and Blazor, build and integrate REST APIs, design Azure Storage solutions, collaborate with offshore teams, apply AI concepts, and continuously learn new technologies. Coordinate development activities and ensure effective communication across teams.

Contribute to and optimize the performance of ClickHouse, assist with debugging, collaborate with teams, and engage with the open-source community.

Develop and maintain .NET Core trading systems for Linux with service-oriented architecture and multi-threaded processing. Implement async, lock-free structures and distributed systems, write unit and integration tests, optimize SQL queries, design data structures and algorithms, and work with communication protocols (SignalR, gRPC, HTTP). Use PostgreSQL, Docker, and AWS in the deployment stack.

Remote backend C# developer to build and optimize a high-load spot-exchange matching engine. Improve performance and API throughput, implement business features, write unit and integration tests, work with .NET Core and PostgreSQL on AWS, and apply multithreading, async, and distributed systems concepts.

Develop and optimize ultra-low-latency, high-performance trading infrastructure in modern C++. Implement and tune order execution, market data connectivity, multi-threaded systems, and risk modules. Profile and benchmark real-time systems, collaborate with quants and traders, and maintain robust, fault-tolerant continuous trading operations.

The role involves developing Power BI reports, dashboards, and visualizations, working with T-SQL and SSAS, and requires extensive experience in C# and ASP.Net.

As a Senior Software Engineer - C++ GPU Performance, you will optimize GPU algorithms, monitor performance metrics, and influence design decisions for self-driving technology.

The role involves optimizing GPU-based algorithms, developing benchmarking frameworks, analyzing performance metrics, and facilitating efficient code development for autonomous vehicle systems.

The Back End Software Engineer will design and build scalable services for a SaaS platform, collaborate with teams, and contribute to quality code and architecture discussions.

Lead a team to develop SaaS solutions while coding and mentoring engineers. Responsible for technical leadership and team management.

Design and implement high-performance system software for medical devices, collaborating with hardware engineers and ensuring adherence to clinical standards.

The C# ETL Azure Developer will work in agile environments to develop high-performance C# libraries for Azure Data Factory, ensuring strong standards, scalability, and troubleshooting capabilities. Candidates should have strong SQL and object-oriented design skills, as well as experience with Azure cloud development.

As a Senior Software Engineer, you will design, build, and maintain scalable distributed systems, engage in cross-functional collaboration, mentor engineers, and improve processes throughout the software lifecycle.

Design high-performance C++ libraries for automated PCB design challenges, mentoring peers and shaping technical direction while collaborating with experts in various fields.

Develop internal web applications using C# and Blazor, optimize SQL queries, integrate AI/ML models, and collaborate across teams.