Top C# Jobs in San Diego, CA

Lead implementation of software safety programs for underwater robotic/autonomous vehicles per MIL-STD-882. Produce safety plans and assessments, perform hazard analyses, track coverage metrics, catalog safety artifacts, review software independently, and present findings at reviews and customer meetings. Coordinate across programs and support demanding schedules with occasional travel.

Customize and configure ServiceNow applications and workflows, manage releases and environments, analyze system interactions, gather and document requirements, develop integrations and import data, troubleshoot issues, and maintain processes, standards, and tools to support Service Transformation and IT operations.

Design, build, and maintain software applications; collaborate with engineers, analysts, and stakeholders; resolve bugs and production issues; write scalable, testable code; perform testing and debugging; produce technical documentation; mentor peers; participate in on-call rotation; leverage the team's data ecosystem to inform application design and improvements.

Work on backend and frontend features for a waste-management SaaS: build Java/Spring Boot services, React UI, work with PostgreSQL/PostGIS, debug production, write tests, collaborate with Customer Success, participate in on-call rotation, and adopt AI-assisted development tools.

As a Unity Engineer, you'll implement features, ensure performance optimization, debug issues, and collaborate with the team to enhance gameplay for mobile titles.

The Backend Engineer will develop infrastructure for product integration, create documentation for team training, and influence technology decisions.

Senior Test Engineer responsible for designing and executing functional, regression, integration, and API tests for C#/.NET web and enterprise applications. Build and integrate automated Selenium and C# API tests into Azure DevOps CI/CD pipelines, track defects, and support manual testing (exploratory, UAT) while collaborating with Agile teams to ensure high-quality delivery.

Build, test, and maintain scalable full‑stack applications. Work across front-end (React, HTML/CSS/JS) and back-end (Python or C#) services, collaborate on feature design and deployment, and optimize performance, security, and maintainability.

Develop, configure, integrate, and sustain Windows-based applications and interfaces. Support API and third-party integrations, deployment, testing, troubleshooting, and operational support to enable interoperability between sensors, communications, security platforms, and government infrastructure.

Build and operate Tier-0 Pricing, Catalog, and Offers services powering Netflix commerce for 330M members. Design and implement product-facing features and platform infrastructure, solve distributed systems problems (consistency, race conditions, throughput), partner cross-functionally, and own production reliability including on-call incident response.

Remote Senior Software Engineer who evaluates Microsoft and complementary technologies, designs and implements custom software (C#, JavaScript, SQL), applies cloud and DevOps practices (Azure/AWS, CI/CD, containers), mentors and networks professionally, and continuously learns and advises clients.

Remote backend C# developer to build and optimize a high-load spot-exchange matching engine. Improve performance and API throughput, implement business features, write unit and integration tests, work with .NET Core and PostgreSQL on AWS, and apply multithreading, async, and distributed systems concepts.

Lead technical design and end-to-end delivery of cloud-native SaaS solutions. Drive architecture, mentor engineers, enforce CI/CD, testing and DevOps practices, improve scalability and reliability, write production code, troubleshoot production issues, and align technical execution with product goals.

Lead design and implementation of full-stack features across .NET back-end APIs and React front ends. Own testing, observability, performance, and production support. Mentor engineers, drive technical design and integrations, collaborate with Product/QA/DevOps/UI/UX, and champion secure engineering practices for sensitive healthcare data.

As an Architect at 3Cloud, you will ensure client success by deploying Azure-based solutions, leading technical discussions, and designing application architecture.

Senior individual contributor (15+ years) building a greenfield platform. Hands-on full-stack development with .NET/C# backend, Angular frontend, and Azure cloud architecture. Design and implement microservices, APIs, and messaging (Service Bus). Own end-to-end lifecycle from requirements to deployment using CI/CD, GitHub Actions, Terraform, PowerShell, and Azure CLI. Must have practical AI experience embedding tools (Copilot, Claude), agent frameworks, RAG, and AI-driven features within development workflows.

Lead and grow a team of 6–12 software engineers, drive project execution from planning to delivery, maintain technical standards and architecture, collaborate with Product and Design, conduct performance management and career development, recruit and retain talent, and improve engineering processes and team culture.

Lead quality efforts across backend services, APIs, and customer-facing apps. Design and implement automated test frameworks, build custom tooling and load testing solutions, improve testing pipeline scalability, mentor engineers, and apply GenAI/LLMs to testing and test-generation challenges.

Build and optimize high-volume web applications using .NET, Node, React and AWS; maintain and improve existing systems; troubleshoot bugs; perform code reviews; mentor junior engineers; participate in on-call rotation; and improve scalability and performance.

Build and maintain NMI's bank-to-bank payment systems: public APIs, internal tools, and third-party integrations. Design and develop services in Scala, TypeScript, and C#, apply TDD, own production quality and incidents, work with AWS containerized microservices, messaging, data stores, and CI/CD. Use AI-first tools to accelerate development, participate in agile processes, refactor large codebases, and collaborate with product and SRE to deliver resilient payment features.

Design, implement, and maintain scalable, reliable, and secure platform infrastructure and tooling from robot to cloud. Write and review code, document systems, prototype and evaluate designs, collaborate with teams to improve frameworks, and support CI/CD, Kubernetes, IaC, and observability stacks.

Lead development of automated API, UI, and end-to-end tests for a real-time trading platform. Extend AI-assisted test generation, build scalable CI/CD test frameworks for order lifecycles and market-data streams, reduce flakiness, triage failures, mentor engineers, and drive quality and testability across the product.

Develop, test, deploy, and maintain .NET-centric web applications using C#, Angular 17+, and Azure. Build and consume REST APIs, work with SQL Server, source control, CI/CD pipelines, and collaborate on code reviews, debugging, performance optimization, and third-party integrations.

Lead design and delivery of cloud-native .NET services on Azure; define architecture and standards; estimate and scope work; mentor engineers; improve CI/CD and Agile practices; ensure performance, scalability, security, and cross-team alignment.

Build, test, and integrate secure backend services and APIs for DoD mission-planning. Work on REST and gRPC services, asynchronous workflows, geospatial databases, containerized deployments, CI/CD, automated tests, and vulnerability remediation while collaborating with AI/ML, frontend, and cybersecurity teams.