Senior C# jobs in Washington

20 open right now — Senior roles, mentioning C#, in Washington. Read straight from companies’ own boards, and every listing links to the original posting.

Of the 20 newest shown here, 2 state pay and 1 are remote, from 7 employers.

• A

  Salesforce Developer, Sr. System Development Engineer , Frontier AI Tools

  Amazon Web Services, Inc. · Seattle, WA

  Full-timeSenior

  posted 4 days ago
• A

  Software Development Engineer, AWS Service Quotas

  Amazon Development Center U.S., Inc. · Seattle, WA

  Full-timeSenior

  posted 16 days ago
• A

  Software Development Engineer, Agentic AI, Velocity Labs

  Amazon Development Center U.S., Inc. · Seattle, WA

  Full-timeSenior

  posted 1 month ago
• A

  Software Development Engineer, (Level 5)

  Amazon.com Services LLC · Seattle, WA

  Full-timeSenior

  posted 1 month ago
• A

  Sr Systems Development Engineer, AWS AI/ML Servers

  Amazon Data Services, Inc. · Seattle, WA

  Full-timeSenior

  posted 1 month ago
• A

  Sr System Development Engineer, Mfg Bring Up and Test, AWS Mainstream Compute

  Amazon Development Center U.S., Inc. · Seattle, WA

  Full-timeSenior

  posted 1 month ago
• A

  Software Development Engineer, AWS Border Network Engineering (L5)

  Amazon Data Services, Inc. · Seattle, WA

  Full-timeSenior

  posted 1 month ago
• A

  Professional Services III - AMZ26939.3

  Amazon Web Services, Inc. - A97 · Seattle, WA

  Full-timeSenior

  $154K – $208K/yr · posted 1 month ago
• A

  Software Development Engineer, Building Connectivity Service Automation

  Amazon Data Services, Inc. · Seattle, WA

  Full-timeSenior

  posted 2 months ago
• A

  Sr. Software Development Engineer, Inference Team - AWS Neuron

  Annapurna Labs Ltd. · Seattle, WA

  Full-timeSenior

  posted 2 months ago
• A

  Senior Embedded Software Engineer, Applied Automation Controls/Embedded Software

  Amazon.com Services LLC · Seattle, WA

  Full-timeSenior

  posted 2 months ago
• A

  Sr Systems Development Engineer, AWS Hardware Engineering Services, AI UltraServers

  Amazon Web Services, Inc. · Seattle, WA

  Full-timeSenior

  posted 2 months ago
• A

  Senior DevEx Engineer, AWS Developer Experience

  Amazon Web Services, Inc. · Seattle, WA

  Full-timeSenior

  posted 3 months ago
• A

  Senior System Development Engineer, DynamoDB

  Amazon Development Center U.S., Inc. · Seattle, WA

  Full-timeSenior

  posted 4 months ago
• A

  Sr. Systems Dev Engineer, AI & Strategic Partner Engineering

  Amazon Development Center U.S., Inc. · Seattle, WA

  Full-timeSenior

  posted 4 months ago
• A

  GNC Sr. System Development Engineer, Prime Air

  Amazon.com Services LLC · Seattle, WA

  Full-timeSenior

  posted 4 months ago
• A

  Software Development Engineer, (Level 5)

  Amazon Data Services, Inc. · Seattle, WA

  Full-timeSenior

  posted 5 months ago
• A

  Sr. Systems Development Engineer - DO-178C Certification Lead (DER), Prime Air

  Amazon.com Services LLC · Seattle, WA

  Full-timeSenior

  posted 5 months ago
• A

  Sr. System Development Engineer, AWS Mainstream Compute

  Amazon Data Services, Inc. · Remote (United States)

  RemoteFull-timeSenior

  posted 6 months ago
• D

  Senior Software Engineer - Fullstack

  Databricks · Seattle, WA

  SeniorType not listed

  $158K – $214K/yr · posted 3 years ago