Top Senior C# Jobs in San Diego, CA

Reposted 3 Days AgoSaved
Remote or Hybrid
San Diego, CA
95K-145K Annually
Senior level
95K-145K Annually
Senior level
Cloud • Insurance • Payments • Software • Business Intelligence • App development • Big Data Analytics
Senior Software Engineer responsible for developing and maintaining web applications and microservices (React, Golang). Mentor team members, lead code reviews, influence technical decisions, improve CI/CD and testing strategies (unit, E2E, performance), collaborate across teams on integrations, and promote engineering best practices and documentation.
Top Skills: .NetAi ToolsApi TestingC#Ci/CdCypressE2E TestingGoJavaScriptPerformance TestingReactRestsharpScrumTypescriptUi TestingUnit Testing
3 Days AgoSaved
Easy Apply
Remote
San Diego, CA
Easy Apply
167K-231K Annually
Senior level
167K-231K Annually
Senior level
Artificial Intelligence • Fintech • Machine Learning • Social Impact • Software
Design, build, and scale authentication, authorization, and experimentation systems for Upstart's lending products. Implement OAuth/OIDC/SAML-based flows, secure APIs with containerized deployments, partner with security and product teams to improve IAM, mentor engineers, participate in architecture, and drive platform experimentation and lifecycle improvements.
Top Skills: C#Claude CodeCursorDockerJavaKotlinKubernetesMfaOauth 2.0Openid ConnectRubySAMLSso
Reposted 4 Days AgoSaved
Easy Apply
Remote or Hybrid
San Diego, CA
Easy Apply
200K-215K Annually
Senior level
200K-215K Annually
Senior level
AdTech • Artificial Intelligence • Marketing Tech • Software • Analytics
As a Lead Software Engineer, you'll design and develop GenAI platforms, integrate LLMs, mentor engineers, and solve technical challenges for scalable solutions.
Top Skills: BedrockC#Cloud InfrastructureGenerative AiGoJavaJavaScriptLanggraphLarge Language ModelsMcpOpenaiPython
Reposted 6 Days AgoSaved
Easy Apply
Remote
San Diego, CA
Easy Apply
124K-155K Annually
Senior level
124K-155K Annually
Senior level
Digital Media • eCommerce • Information Technology • Marketing Tech • Pet • Retail • Social Media
The Lead Software Engineer in Test will own test automation strategy, design automation frameworks, integrate testing into CI/CD, and mentor QA engineers to enhance quality across engineering processes.
Top Skills: AppiumC#CypressGithub ActionsGitlab CiJavaJenkinsJestPlaywrightPythonRestassuredSeleniumTypescript
Reposted 7 Days AgoSaved
Easy Apply
Remote
San Diego, CA
Easy Apply
195K-270K Annually
Senior level
195K-270K Annually
Senior level
Artificial Intelligence • Fintech • Machine Learning • Social Impact • Software
Lead the architectural design and development of a new consumer credit product, focusing on backend systems, distributed services, and integrating AI tools. Mentor team members and influence product direction through engineering insights.
Top Skills: APIsAvroC#DatabasesJavaKafkaKinesisKotlinProtobufPythonRubySqs
Reposted 8 Days AgoSaved
Remote or Hybrid
San Diego, CA
75K-257K Annually
Senior level
75K-257K Annually
Senior level
Consumer Web • Coupons • Healthtech • Social Impact • Pharmaceutical
The Sr. Software Engineer designs, implements, and maintains scalable cloud services, contributes to team processes, and acts as a subject matter expert while leading projects and mentoring others.
Top Skills: AirflowAWSAws Step FunctionsAzureC#CloudwatchDatadogDockerGCPGoJavaKubernetesLuigiPythonReactRustSentrySumo Logic
9 Days AgoSaved
Remote or Hybrid
San Diego, CA
Senior level
Senior level
Software
Design, implement, and improve significant features in HCSS products. Analyze product architecture and databases for ROI-driven improvements. Lead code reviews, mentor junior developers, collaborate to enhance infrastructure, reliability, and CI/CD practices.
Top Skills: .Net.Net CoreApp InsightsApp Service PlansAsp.Net MvcAzure App ServicesAzure FunctionsBuild And Release PipelinesC#Ci/CdCSSDapperEntity FrameworkInfrastructure-As-CodeJavaScriptReactRestful ApisSlot-Based DeploymentSQLTsqlTypescript
10 Days AgoSaved
Remote
San Diego, CA
166K-269K Annually
Senior level
166K-269K Annually
Senior level
Consumer Web • eCommerce • Machine Learning • Software • Sports • Analytics
Lead design and build of scalable AWS cloud-based backend services and APIs powering web and mobile customer experiences. Own end-to-end feature delivery, improve grading and authentication workflows for scale and reliability, leverage AI tools to accelerate development, and provide technical leadership and mentorship across teams.
Top Skills: AWSC#Claude CoworkCodexEvent-Driven ArchitecturesJavaMicroservicesNext.JsPythonReactServerless
Reposted 11 Days AgoSaved
Easy Apply
Remote or Hybrid
San Diego, CA
Easy Apply
131K-176K Annually
Senior level
131K-176K Annually
Senior level
Artificial Intelligence • Cloud • Computer Vision • Hardware • Internet of Things • Software
The Senior Software Engineer will lead projects for the Forms platform, designing and building features across web, mobile, and backend systems while mentoring other engineers and improving platform scalability and reliability.
Top Skills: C#GoGraphQLJavaReactTypescript
16 Days AgoSaved
Easy Apply
Remote
San Diego, CA
Easy Apply
186K-219K Annually
Senior level
186K-219K Annually
Senior level
Artificial Intelligence • Blockchain • Fintech • Financial Services • Cryptocurrency • NFT • Web3
Own reliability, automation, and DevOps for Coinbase's corporate IAM platform: on-call/incident response, CI/CD and IaC pipelines, identity lifecycle tooling, observability and disaster recovery, documentation, and cross-team IAM advisement to ensure secure, scalable access for a global workforce.
Top Skills: AbacAuth0AWSAzureC#Ci/CdContainer OrchestrationDuoEntraidGCPGenerative AiGitGoIacJavaMfaOktaPingPythonRbacRubySsoTerraform
17 Days AgoSaved
Remote
San Diego, CA
Senior level
Senior level
Insurance • Financial Services
Lead design, development, and maintenance of scalable .NET web and Windows applications. Build RESTful APIs, integrate front-end frameworks, collaborate with cross-functional teams, drive architectural decisions, perform code reviews and testing, and support deployments and backlog reduction for the eApp portfolio.
Top Skills: .Net.Net FrameworkAngularAWSC#Ci/CdDynamoDBIicsIisLambdaMs Sql ServerReactRestful ApisS3SQLSsisVue
Reposted 17 Days AgoSaved
Remote
San Diego, CA
200K-230K Annually
Senior level
200K-230K Annually
Senior level
Computer Vision • Digital Media • Kids + Family • Mobile • Software • Sports
The Staff Software Engineer will enhance video capabilities, support live streaming and storage infrastructure, and collaborate on platform development. Responsibilities include coding, mentoring, and ensuring platform reliability for millions of users.
Top Skills: AWSC#C++GoKotlinNode.jsPythonReactRustSwiftTypescript
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Reposted 18 Days AgoSaved
Remote or Hybrid
San Diego, CA
Senior level
Senior level
Gaming
The Principal Software Engineer will design and optimize backend applications/services, improve payment integration, and oversee code quality within AWS.
Top Skills: AngularAWSC#C++JavaJavaScriptKubernetesNoSQLReactSQL
Reposted YesterdaySaved
In-Office
San Diego, CA
Senior level
Senior level
Software • Analytics • Semiconductor
The role involves designing, developing, and supporting software for complex electro-mechanical systems in semiconductor manufacturing. Responsibilities include full lifecycle development, troubleshooting, and collaboration across teams.
Top Skills: C#C++Ci/CdEmbedded LinuxGitIso 13849JenkinsPythonQtRtosSecs/GemVisual StudioWindowsWinformsWpf
Reposted 3 Days AgoSaved
In-Office
San Diego, CA
125K-175K Annually
Senior level
125K-175K Annually
Senior level
Aerospace
The Test Engineer will design and execute environmental tests for PCBAs, develop test protocols, and ensure compliance with testing standards while collaborating with project teams.
Top Skills: Ate ComponentsC#LabviewLabwindows/CviLinuxPxi ArchitecturesPythonVisual BasicWindows
Reposted 3 Days AgoSaved
In-Office
San Diego, CA
175K-200K Annually
Senior level
175K-200K Annually
Senior level
Aerospace
The Test Manager oversees test engineering operations, designs and executes test plans, leads testing efforts, and ensures adherence to quality standards, while mentoring the engineering team and collaborating with stakeholders.
Top Skills: Ate ComponentsC#High End Spectrum AnalyzersLab-Windows/CviLabviewLinuxPxi ArchitecturesPythonVector Network AnalyzersVisual BasicWindows
Reposted 4 Days AgoSaved
In-Office or Remote
San Diego, CA
135K-160K Annually
Senior level
135K-160K Annually
Senior level
Financial Services
The role involves coding, testing, and deploying Salesforce solutions, developing integrations, mentoring junior developers, and participating in Agile Scrum ceremonies while adhering to best practices and addressing technical issues.
Top Skills: ApexC#C++CSSHTMLJavaJavaScriptLightningMicrosoft Office SuiteMySQLOracleRestfulRubySalesforceSoapSOQLSoslSQL ServerVisualforce
Reposted 23 Days AgoSaved
Remote
San Diego, CA
150K-175K Annually
Senior level
150K-175K Annually
Senior level
Cloud • Digital Media • Professional Services • Database
As a Senior Software Engineer, you'll develop and build tools for creative projects while leading feature development and collaborating with teammates.
Top Skills: CC#C++JavaTypescript
Reposted 23 Days AgoSaved
Remote
San Diego, CA
136K-160K Annually
Senior level
136K-160K Annually
Senior level
Enterprise Web • Fintech • Marketing Tech • Software
Lead high-complexity technical implementations as a Senior Solutions Architect, providing architectural guidance and designing scalable solutions with a focus on API integrations and enterprise data ecosystems.
Top Skills: AWSAzureC#Ci/CdGCPGitJavaPostgresPythonRest ApiSQL
Reposted 5 Days AgoSaved
In-Office
San Diego, CA
71K-187K Annually
Senior level
71K-187K Annually
Senior level
Healthtech • Biotech • Pharmaceutical
The role involves maintaining lab automation equipment, supporting workflow in protein therapeutic discovery, and collaborating on automation-driven research workflows.
Top Skills: C#Colony/Pick SystemsElectronic Lab Notebook (Eln)GenedataIntegrated Robotic SystemsJavaJmpLimsLiquid HandlersMicro-DispensersPlate ReadersPostgresPower BIProtein Quantification InstrumentsPythonSpotfireSQLTableau
6 Days AgoSaved
In-Office
San Diego, CA
Senior level
Senior level
Professional Services • Consulting • Industrial
Senior .NET developer to deploy ASP.NET applications to Amazon Web Services, build real-time vessel tracking and reporting views, and work with C#, SQL Server, MVC, Windows Communication/Services, and firmware in an Agile environment. 6-month contract-to-hire based in San Diego.
Top Skills: .NetAmazon CloudAsp.NetAsp.Net MvcAWSC#FirmwareSQL ServerWindows Communication (Wcf)Windows Services
Reposted 9 Days AgoSaved
In-Office
San Diego, CA
141K-229K Annually
Senior level
141K-229K Annually
Senior level
Healthtech • Biotech • Pharmaceutical
Design and develop software for automated laboratory workflows, build data pipelines, implement machine learning models, and integrate various systems to enhance biotherapeutics discovery.
Top Skills: AWSAzureBashC#C++GitGitlabJavaScriptJmpMatlabPower BIPythonRSASSpotfireSQLTableauVBA
Reposted YesterdaySaved
Remote
San Diego, CA
Senior level
Senior level
Information Technology • Professional Services • Analytics • Consulting
The Senior C# Developer will lead AI enablement by transforming APIs into an Agent Mesh using C# and the MCP, ensuring secure AI interactions through Gravitee management.
Top Skills: .NetC#Gravitee Api ManagementModel Context Protocol (Mcp)Oauth 2.1OpenapiPythonSwagger
YesterdaySaved
Remote
San Diego, CA
95K-159K Annually
Senior level
95K-159K Annually
Senior level
Retail • Sports
Lead a backend product team for the List & Services domain to design, build, and maintain high-performance APIs and data architecture. Drive technical direction, mentor engineers, conduct code reviews, own roadmaps, tune databases, resolve faults, and collaborate with product and cross-functional teams to deliver secure, scalable eCommerce services.
Top Skills: Agile/ScrumBigQueryC#ConfluenceDatabricksElasticGitGitJavaJIRAKafkaPostgresPythonRedisSpring Framework
YesterdaySaved
Remote
San Diego, CA
128K-213K Annually
Senior level
128K-213K Annually
Senior level
Energy • Manufacturing • Solar • Renewable Energy
Technical leader responsible for designing complex software modules and end-to-end architecture focused on scalability, availability, and performance. Drive design and development in agile teams, mentor engineers, work with product leaders and stakeholders, lead technology decisions and impact assessments, and provide deep expertise in SmartSignal products and implementation.
Top Skills: .NetAgileApache CommonsApm SmartsignalC#JavaLean Six SigmaMavenPostgresRestScrumSmartsignal AnalyticsSmartsignal ClassicSoapSQL ServerWsdl
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