Top C# Jobs in San Diego, CA

As a Principal Presales Engineer, you will lead technical pre-sales activities, engage customers, propose solutions, mentor peers, and establish trust through effective communication.

Develop and maintain web and mobile features using React/React Native; build scalable backend services in C#, TypeScript, and Ruby on Rails; work with AWS (ECS/EKS/Lambda), Terraform, event-driven systems (Debezium, Kafka, SNS/NServiceBus), and Postgres/Salesforce integration. Collaborate with product and design, follow CI/CD and testing best practices, and contribute to system design and continuous improvement.

The Software Developer will design, build, and maintain custom software, collaborate with teams, and mentor junior developers, focusing on creating high-quality applications.

The Senior Technical Implementation Engineer leads integration projects using banking APIs, resolves complex technical issues, and mentors junior engineers while ensuring customer satisfaction through effective solutions.

As a Software Engineer, you'll develop and maintain APIs and backend services for automation in healthcare processes, ensuring reliability and scalability.

As an Enterprise Architect, you will lead architectural efforts across systems, promote data literacy, and collaborate with teams to modernize and implement scalable enterprise systems.

As a Senior Full Stack Software Engineer, you'll design and develop end-to-end web applications, handle data architecture, ensure performance, and collaborate across teams to deliver effective technical solutions.

The role involves designing and building scalable web applications, focusing on frontend and backend development, database management, and performance optimization.

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.

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.

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.

Develop, enhance, and maintain enterprise web-based GIS applications, dashboards, APIs, and geospatial services. Integrate GIS with enterprise systems, support ArcGIS Enterprise, assist modernization to cloud, perform testing, troubleshooting, deployment, documentation, and user support within federal environments.

Design, build, and maintain scalable backend services and gRPC APIs in Rust. Architect modular systems using Clean Architecture, CQRS, and event sourcing; implement actor-based concurrency, data access for relational/time-series/graph DBs, observability with Tracing/OpenTelemetry, and end-to-end testing. Collaborate in Agile teams, perform code reviews, communicate with clients, and operate services on Kubernetes when needed.

Senior .NET Web App Developer responsible for designing and building .NET web applications, implementing Oracle PL/SQL solutions, using Entity Framework and Blazor, applying design principles, producing technical documentation, performing performance tuning, and collaborating in Scrum/Agile teams with Bitbucket, JIRA, Tempo, and Confluence.

Develop and maintain web-based applications using .NET/C#, JavaScript, HTML/CSS, SQL and Oracle/SQL Server. Perform root cause analysis, collaborate with teams for requirements, follow Agile SDLC, present change demonstrations, and use Azure DevOps/Jira for lifecycle management. Implement and maintain Blazor components.

Senior .NET Software Engineer responsible for end-to-end software development using Microsoft technologies. Requires extensive experience in SDLC, design principles, technical documentation, web application development with .NET, Agile/SCRUM, Entity Framework, database design, and version control. Familiarity with project tools JIRA, TEMPO, Bitbucket, and Confluence preferred.

Lead development and maintain Microsoft Dynamics 365 CE Sales solutions, build forms, workflows, plug-ins, integrations, and reusable code. Drive DevOps practices, perform code reviews, lead design/POC efforts, mentor engineers, collaborate with product and QA, support deployments and production troubleshooting.

Create and optimize high-quality, mobile-optimized character shaders and material workflows in Unity URP. Develop master materials, tools, and editor extensions (C#). Profile and debug performance on iOS/Android, collaborate with artists on look development, and ensure efficient rendering across mobile devices.

Lead design, architecture, and hands-on implementation of scalable healthcare SaaS systems. Drive interoperability (HL7, FHIR, EDI), mentor engineers, liaise with stakeholders, manage technical risk, and ensure quality, performance, security, and innovation.

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.

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.

First engineering hire to build end-to-end features across React frontends and C#/.NET (and Python) backends, work with PostgreSQL and MongoDB, integrate third-party automotive APIs, use agentic AI coding tools, and collaborate on architecture and engineering culture.

The Engineering Manager will lead a team focused on software for school nutrition, managing performance, driving delivery, and collaborating on modernization efforts while ensuring high-quality engineering practices.

The Senior ServiceNow Developer designs and builds solutions on the ServiceNow platform, working with stakeholders to enhance legal practice operations and improve service delivery through automation and integrations.

The Staff Software Engineer will lead design and development of cryptocurrency platforms, provide technical mentorship, and drive system reliability, while staying current on blockchain trends.