Top C# Jobs in San Diego, CA

Configure and support the FASTDS-VS COTS application, including requirements analysis, user permissions, reference tables, change-request development, scripting, debugging, source control, testing, implementation specifications, and production support. The role requires SQL and object-oriented development experience, familiarity with software development methodologies, and strong analytical and communication skills.

Provides senior technical advisory and incident-response support for enterprise Azure cloud-native applications and AI solutions. The role improves reliability, performance, scalability, security, observability, and cost efficiency through assessments, telemetry analysis, root-cause investigations, architecture guidance, automation, and modernization planning. It coordinates Microsoft support, engineering, account teams, and customers during complex production incidents, participates in on-call rotations, and serves as a trusted technical advisor.

Develops and maintains secure, accessible, responsive WordPress websites and web applications for Military OneSource. Responsibilities include PHP and JavaScript development, CMS customization, REST API integrations, UX/UI implementation, Section 508 and WCAG compliance, accessibility testing, production troubleshooting, performance optimization, Agile delivery, Git workflows, and collaboration with cybersecurity and DevSecOps teams in a Federal environment.

Lead architecture and hands-on development of scalable backend systems and APIs supporting real-time applications at massive scale. Own the full engineering lifecycle, establish standards for reliability and testing, troubleshoot production issues, influence technical roadmaps, collaborate cross-functionally, and mentor engineers. The role requires deep backend development, distributed cloud systems, system design, automated testing, and technical leadership experience.

Design, develop, test, and maintain enterprise-scale healthcare software using C#, .NET, RESTful APIs, SQL Server, and modern JavaScript frameworks. Build scalable features, optimize databases, address concurrency issues, debug complex systems, contribute to architecture decisions, and support the full software development lifecycle. Collaborate with distributed cross-functional teams while helping modernize infrastructure through AWS migration, microservices, and cloud technologies.

Designs and delivers scalable, resilient, cloud-native infrastructure services for Azure Virtual Machine Scale Sets. Responsibilities include gathering requirements, creating design documents, writing maintainable code, estimating work, monitoring services, responding to incidents, and improving availability, reliability, observability, efficiency, and performance at hyperscale.

Build and maintain low-latency connectivity APIs and integrations with crypto exchanges, OTC desks, brokers, and other trading venues. Develop order routing, trade execution, and real-time data ingestion systems using REST, WebSocket, and FIX. Monitor connections and data pipelines, improve reliability and observability with Grafana and Prometheus, collaborate on exchange onboarding, and create automated tests for production readiness.

Develop scalable C++ software that defines and enforces endpoint behavior across millions of managed Windows endpoints. Responsibilities include implementing features, improving platform performance, shipping production code, designing new systems, writing architecture documents, defining subsystem contracts, and collaborating with server, UI, product, and design teams. The role requires deep Windows systems and kernel-driver expertise, with preferred experience in WHQL, minifilter or WFP drivers, macOS Endpoint Security, and Linux kernel development.

Develop and implement computational design, BIM automation, and data-driven workflows for complex building projects. Build and validate Revit-integrated prototypes using tools such as Dynamo, Grasshopper, Python, C#, and the Revit API. Collaborate with architecture, engineering, digital delivery, IT, and project teams to improve coordination, documentation, QA/QC, and design efficiency. Measure automation value, document workflows, support scalable deployment, and communicate outcomes to project and firm leadership.

Maintains AWS infrastructure supporting PLM applications for DoD customers. Responsibilities include cloud architecture, Ansible automation, database administration, application installation and patching, security updates, performance tuning, testing, troubleshooting, documentation, and infrastructure scaling. Requires AWS and Security+ certifications, enterprise cloud experience, Linux and Windows administration, database expertise, an active or obtainable U.S. national security clearance, and potential travel to customer sites.

Design, build, deploy, and operate scalable backend platform services and shared libraries. Contribute to architecture, reliability, developer experience, continuous delivery, monitoring, alerting, and incident response. Investigate production issues, implement lasting fixes, participate in technical reviews, mentor engineers, and collaborate cross-functionally to deliver business value. The role also encourages thoughtful use of AI tools to improve productivity.

Leads end-to-end design, development, quality, and integration of complex software solutions and cloud services. Provides technical leadership for enterprise-wide projects, manages engineering processes, risks, dependencies, and delivery priorities, and writes code across the software ecosystem. Collaborates with multidisciplinary teams to deliver measurable, user-centric technology solutions, primarily supporting healthcare caregivers.

Leads global engineering teams and multiple EPM product lines through legacy modernization, SaaS and multi-tenant development, AI-enabled software delivery, customer-facing AI feature development, and operational excellence. Owns engineering strategy, quality, reliability, DORA outcomes, security, budgets, vendors, staffing, and organizational transformation while delivering reliable finance applications and cloud migrations.

Design and implement runtime protocols, formats, and systems to capture, serialize, stream, and replay interactive 3D content across engines. Own C++ runtime and C# APIs across editor, build, simulation, streaming, and playback. Optimize for low-latency, determinism, memory and bandwidth constraints, and build AI interfaces for inspecting and invoking engine state.

Design and implement scalable first-mile networking solutions for Microsoft 365 Substrate and COSMIC. Drive design, dependency identification, coding, optimization, debugging, and on-call monitoring. Analyze production telemetry to improve reliability, performance, and observability. Act as a DRI, lead design and release plans, and collaborate with stakeholders to meet product requirements at global scale.

Own end-to-end technical delivery for enterprise SitecoreAI and XM Cloud implementations. Lead discovery, architecture, development, QA, releases, client communication, and project delivery. Guide headless Next.js teams using React and TypeScript on Vercel or Netlify, ensure accessibility, SEO, performance, and security standards, and mentor developers. Support estimates, proposals, account growth, reusable solutions, and AI-assisted engineering practices.

Leads hands-on architecture, development, and delivery of secure healthcare systems while mentoring engineers and establishing engineering standards. Drives Azure, microservices, DevSecOps, automated testing, AI-assisted development, and scalable solutions. Partners with product, clinical, cloud, and security stakeholders to translate business needs into technical direction and support WelbeHealth’s PACE model.

Develop, test, deploy, maintain, and optimize software solutions using Microsoft technologies and Azure cloud services. Collaborate with business stakeholders, architects, security, infrastructure, product, and support teams throughout the software development lifecycle. Modernize legacy applications, build REST APIs, implement automated testing, ensure PCI and HIPAA compliance, document systems, manage releases, and support production troubleshooting, monitoring, performance, and reliability.

Lead complex software initiatives from architecture through delivery while remaining hands-on. Design scalable cloud-native systems, establish engineering and DevOps standards, manage technical debt, resolve production issues, mentor engineers, and partner with Product, QA, Security, UX, and Infrastructure teams. The role focuses on Microsoft technologies, Azure services, distributed systems, event-driven architectures, testing, observability, reliability, and predictable execution of the product roadmap.

Architects and leads qualification, performance validation, automation, reliability, and fleet-readiness efforts for next-generation Azure Storage infrastructure. Develops tooling, telemetry, and performance analysis frameworks while partnering across Storage, Compute, Networking, Platform Engineering, and hardware teams. Provides technical leadership through architecture, incident resolution, mentorship, and engineering best practices. The role is onsite three days weekly in Redmond, Washington.

Leads site reliability engineering for mission-critical cloud platforms, focusing on disaster recovery drills, platform rebuild validation, infrastructure automation, Kubernetes operations, CI/CD, observability, incident response, and system resilience. Collaborates across engineering, security, applications, and data teams while driving remediation and modernization efforts. The role requires deep AWS, Infrastructure as Code, containerization, automation, monitoring, and failure-analysis expertise, plus eligibility for Public Trust clearance.

Leads architecture and hands-on development of scalable backend systems and APIs supporting real-time applications. Owns the engineering lifecycle, writes high-performance code, establishes testing and reliability practices, resolves production issues, guides technical roadmaps, collaborates cross-functionally, and mentors engineers. The role requires expertise in object-oriented backend development, distributed cloud systems, automated testing, system monitoring, and technical leadership.

The Senior Software Engineer designs and develops software applications, optimizes APIs and databases, collaborates with teams, and ensures code quality through various testing practices.

Perform end-to-end, integration, system, user acceptance, and automated testing for software applications. Create test strategies, plans, documentation, and automated test cases; execute tests; assess results; and track defects through resolution. Translate business requirements into technical requirements, identify risks, troubleshoot application issues, and collaborate with engineering and development teams. Support product implementations, training, technical escalations, and quality assurance oversight across project workstreams.

Lead design and implementation of modernized insurance underwriting and policy administration solutions. Drive cloud transformation, data-driven and secure architectures, improve risk selection and claims resolution, enhance customer experience through automation, mentor technical teams, manage client relationships, and oversee project lifecycle, budgets, and delivery quality.