Top Senior C# Jobs in San Diego, CA

Design, develop, and modernize desktop and web software tools using .NET, databases, and front-end frameworks. Collaborate with cross-functional teams, create technical designs and project plans, implement secure performant solutions, and mentor team members while supporting digital transformation and legacy tool upgrades.

The Senior Full-Stack Software Engineer will lead the development of innovative tech solutions, engaging with clients and driving project excellence through full-stack capability and collaboration.

Develop foundational XR support in the Unity Engine by integrating third-party SDKs, collaborating with platform partners, and implementing performant rendering and platform-compatibility solutions. Investigate and fix bugs, write automated tests, participate in code reviews, and mentor other engineers to maintain high code quality.

Volunteer senior developer to design, build, and maintain a cross-platform medical scheduling app (web, iOS, Android). Participate across the full development lifecycle: design, coding, testing, CI, deployments, code reviews, production support, incident management, and platform architecture. Attend weekly standups and commit at least four hours per week.

Volunteer Principal Full Stack Engineer to lead and contribute across frontend and backend (React/React Native, Node.js, MongoDB). Own feature development, mentor engineers, collaborate with product/design, ship scalable code, and support CI processes. Must commit 4+ hours weekly and attend a weekly standup; first task includes launching a fundraising campaign.

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

Design, implement, debug, and ship features for Azure Storage front end at cloud scale. Drive design, dependency identification, automation, reliability, observability, and on-call incident response while collaborating with stakeholders and mentoring engineers.

Design and deliver distributed storage systems for AI and machine learning workloads at hyperscale. Lead architecture, development, testing, deployment, and innovations in scalability, performance, security, and efficiency. Collaborate with AI researchers and cloud infrastructure engineers, mentor engineers, and guide technical strategy for high-availability, durable, high-performance storage supporting training and inference.

Lead a cross-functional engineering team to plan and deliver cloud and application modernization. Translate target-state architectures into delivery plans, assess systems for modernization, drive hands-on cloud-native microservices and event-driven implementations, enforce engineering standards, conduct reviews, mentor engineers, and escalate technical risks to leadership.

Design, build, and maintain secure, scalable cloud automation and tooling for Azure Government. Operate mission-critical production systems (24x7 on-call), implement IaC and DevOps pipelines, resolve Azure PaaS and app issues, enforce federal security/compliance, manage IAM and deployments, support audits, and maintain technical documentation.

Design, build, and maintain full-stack browser-based ChartCheck web application using JavaScript/TypeScript. Collaborate with cross-functional teams, implement RESTful APIs, work with MongoDB/SQL databases, conduct code reviews, mentor teammates, and ensure secure, compliant healthcare software practices.

Design, build, and maintain ClearCheck .NET/WPF desktop software for radiotherapy plan checking. Implement DICOM integration, 3D image/dose/plan visualization and DVH evaluation, collaborate with physicists to translate clinical requirements, contribute to architecture, testing and code reviews, and mentor teammates to deliver performant, reliable medical imaging solutions.

Senior full-stack engineer building scalable, cloud-native .NET Core applications. Own and enhance core systems, lead architecture and testing discussions, collaborate with cross-functional teams, work on frontend frameworks (React/Node), telemetry, performance tuning, and cloud deployments (Kubernetes/AWS).

Build, test, deploy, and maintain Microsoft Power Platform solutions for federal modernization programs. Develop Canvas, Model-Driven, and Power Pages applications; configure Dataverse; automate processes with Power Automate; and integrate with external systems using APIs and Azure services. Participate in Agile planning, solution design, testing, troubleshooting, documentation, production support, and release management while meeting federal security, privacy, and accessibility requirements.

Design, develop, customize and maintain enterprise Sitecore solutions (versions 9/10, SXA, JSS, XM Cloud). Produce technical specs, implement components, test and debug in test and production, support teammates, perform demos to customers, and escalate/resolve issues.

Develop, profile, and optimize high-performance C#/.NET software and desktop UIs (WPF/MVVM, Blazor). Apply CS fundamentals, implement CRUD/gRPC services, operate in CI/CD and version-controlled environments, follow secure coding/DoD standards, produce technical documentation, reverse-engineer legacy code, and support system modeling/simulation for defense programs on-site.

Lead design and delivery of scalable on‑premises and hybrid IaaS datacenter systems. Decompose customer requirements, build infrastructure blueprints, automate deployments, produce technical documentation, mentor cloud/infrastructure engineers, and ensure consistent implementation and acceptance criteria across programs. Requires Top Secret clearance and SAP access.

Lead end-to-end full-stack development across React frontends and compiled backends, influence architecture and data modeling, integrate third-party dealership APIs, use AI-assisted coding tools daily, set engineering standards, ship production features to live dealership users, and mentor junior engineers.

Design, implement, and operate cloud-scale telemetry platforms and data pipelines for Azure Monitor. Lead cross-team architecture, mentor engineers, improve AI-enabled development practices, ensure security/compliance, and resolve complex production incidents.

Own operations and reliability for hyperscale Azure GPU clusters and interconnect fabrics. Lead production incident triage, mitigation, recovery, root-cause analysis, and cross-stack debugging across hardware, GPUs, PCIe, firmware, drivers, and software. Develop automation, telemetry, diagnostics, playbooks, and escalation frameworks to improve observability, operational readiness, and mean time to mitigation for large-scale AI and HPC workloads.

Provide technical and architectural leadership to the software development team, design software solutions, mentor team members, and drive projects to completion.

The Lead Technology Engineer will lead IT systems implementation, ensure network security, manage integrations, and enhance operational efficiency through automation.

Develop, enhance, test, deploy, and maintain Microsoft Power Platform solutions (Power Apps, Power Pages, Power Automate, Dataverse). Design data models and integrations using Azure services, REST APIs, and custom connectors. Support Agile delivery, testing, migrations, documentation, deployments, security, privacy, and Section 508 accessibility compliance.

Lead and grow an engineering team building core VM and container platform capabilities for Azure. Drive technical strategy, execution, incident resolution, cross-team coordination, and scalable, secure platform innovations.

Develop high-performance, cross-platform realtime 3D graphics applications using Unity and C#. Responsibilities include writing maintainable code, shaders, architecture and design documents, automated tests, code reviews, performance optimization, frontend collaboration, and production troubleshooting. The role also involves low-level graphics pipelines, complex MVVM-based UI, distributed systems, APIs, and XR/VR development.