Top Senior C# Jobs in San Diego, CA

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.

Analyze, transform, and migrate JCL-based mainframe batch workloads to Azure or distributed platforms. Troubleshoot JCL jobs, analyze Control-M/Atomic schedules and CICS environments, convert JCL to PowerShell, automate and optimize batch jobs in Azure, document requirements, and collaborate across cross-functional teams using Agile practices.

As a Full Stack Engineer, you'll develop full-stack applications using .NET and React, focusing on creating user-friendly interfaces and robust backends for AI integration. Responsibilities include API design, database management, application deployment, code quality assurance, and collaboration with cross-functional teams.

Defines enterprise application architectures, standards, frameworks, and reference implementations for scalable, secure solutions. Evaluates technologies, designs integrations, documents solutions, facilitates discovery and technical workshops, and partners with product, design, and engineering teams. Mentors technical leads and senior engineers while driving architectural best practices and emerging technology adoption. Requires expertise across Java, frontend frameworks, AWS, infrastructure as code, enterprise integration, Salesforce, and distributed application design.

Design and implement PostgreSQL internals and indexing/query features for large-scale document workloads, extend query engine with BSON-aware operators and custom scan nodes, tune index pruning and storage, profile distributed systems for performance, collaborate with open-source DocumentDB/PostgreSQL communities, and participate in design/code reviews.

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.

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 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.

Design and implement PostgreSQL internals, indexing, query engine extensions, and storage-layer features to support large-scale document workloads on Azure. Profile distributed systems, tune performance, collaborate with open-source communities, conduct design/code reviews, and drive cross-team alignment for mission-critical database features.

Lead a cross-discipline engineering team to deliver production-ready, AI-enabled solutions across the full lifecycle. Coach engineers and data scientists, manage a portfolio of engagements, act as player‑coach on select projects, strengthen multidisciplinary practices, and champion responsible, hypervelocity AI engineering and reusable accelerators.

Design and implement PostgreSQL internals and indexing strategies for large-scale document workloads. Extend query engine with BSON-aware operators and custom scan nodes, optimize index pruning, profile distributed system performance, collaborate with open-source communities, and lead design/code reviews.

Hands-on Principal engineer who designs, builds, and operates production-grade Azure solutions with strategic customers; develops an observability-focused Azure service, supports live production via on-call and incident response, creates reusable tooling and reference implementations, and drives platform improvements while mentoring field engineering teams.

Design, implement, and operate highly scalable Azure cloud services and full‑stack features for Compute Manager. Own design, coding, debugging, reliability, and on‑call operations as a DRI. Collaborate across teams to improve availability, performance, observability, and run distributed systems at hyperscale.

Design and deliver large-scale, resilient AI and Kubernetes infrastructure for hybrid environments. Implement, optimize, and maintain cloud-native, container orchestration solutions; integrate AI capabilities; participate in on-call rotations; mentor engineers and drive reliability, observability, and performance at scale.

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.

Design, build, and own operator services that provision, repair, and manage bare-metal GPU servers. Implement secure, extensible code across firmware, imaging, DPU initialization, and network configuration. Operate and monitor GPU fleets at scale, serve on-call rotations to resolve incidents, and apply AI tools across the SDLC while driving automation, telemetry, and reliability improvements.

Leads the design, implementation, optimization, and support of highly scalable Azure Storage services. Responsibilities include end-to-end performance testing, benchmarking, automation, profiling, bottleneck and root-cause analysis across compute, storage, and networking layers, KPI definition, scaling recommendations, and operational incident response. The role collaborates across teams, drives project and release plans, supports reliable and secure services, and mentors engineers while participating in on-call responsibilities.

Serve as technical liaison between product, business, and development teams to define specifications, support application releases, manage change/defects, document integrations, and ensure performance, security, and cross‑functional alignment across Cloud, Infrastructure, and Security domains.

The Principal Software Engineer will provide architectural guidance, mentor developers, manage risks, and ensure high-quality software production across various teams and product areas.

Lead design and delivery of integrations platform features (SDKs, agents, pipelines). Improve integration authoring, reliability, scalability, observability, and developer tooling. Partner across product and customer teams, mentor engineers, and evaluate emerging technologies to scale integration development and agent-based workflows.

Design, develop, and maintain scalable software applications with a UI focus. Collaborate with product owners, tech leads, testers, and developers; participate in code reviews; write clean code; troubleshoot defects; improve development processes; and stay current with emerging technologies.

Design, develop, and maintain scalable web applications using .NET backend and Angular/React frontend. Collaborate on requirements, implement RESTful APIs, optimize performance, debug, maintain documentation, support end-users, and work within CI/CD and DevOps workflows.

Design, develop, customize and integrate Microsoft Dynamics 365 CRM/CE solutions. Build entities, forms, workflows, plugins, reports and dashboards using CRM SDK, C#, JavaScript, ASP.NET and SQL. Troubleshoot issues, estimate implementation approaches, collaborate with stakeholders, document solutions, and mentor junior developers. Banking domain experience preferred.

Lead development and enhancement of mathematical optimization algorithms and APIs (LP, MIP, QP, etc.). Implement, benchmark, and document new solver features, support product releases, present at conferences, and collaborate with global teams to improve performance and numerical robustness.

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.