Top Senior C# Jobs in San Diego, CA

Design and maintain scalable services, APIs, distributed systems, and data pipelines for AI training data infrastructure. Own systems through design, implementation, testing, deployment, and monitoring. Lead architectural decisions, improve reliability and scalability, mentor engineers, and collaborate with AI/ML, product, and data operations teams. Contribute to CI/CD, containerization, DevOps, and cloud deployment practices.

Build and scale full-stack applications, backend services, APIs, infrastructure, and user experiences supporting millions of users. Design reliable, high-performance systems; partner with Product, Design, and Data; own projects through deployment and optimization; improve observability and developer productivity; and support AI adoption through automation and AI-powered workflows.

Design, build, test, deploy, and support scalable data-intensive applications for real estate analytics. Own software throughout its lifecycle, collaborate on technical designs, uphold engineering best practices, and contribute to architecture and continuous improvement. The role requires modern server-side and front-end development, relational database expertise, source control, testing, operations, and AI-assisted development workflows.

Builds, integrates, and delivers secure software capabilities for regulated government and DoD environments. Responsibilities include software architecture and development, Agile delivery, Git workflows, automated testing, Kubernetes or cloud deployment, DevSecOps security gates, resilient DDIL and afloat/ashore PaaS architectures, and secure Cross-Domain Solutions integration.

Lead development of secure, scalable digital banking software across front-end and backend systems. Design Angular or React applications, build APIs, optimize SQL performance, integrate third-party platforms, improve code quality, implement testing strategies, and mentor engineers. Collaborate with cross-functional teams in an Agile environment while supporting cloud-native practices, regulatory compliance, and continuous product improvement.

Develops, maintains, and enhances scalable web applications, internal tools, libraries, and shared components for international enterprise clients. Collaborates with cross-functional teams, participates in code reviews, creates technical documentation, and shares knowledge. Requires strong software development principles, design patterns, cloud, database, CI/CD, messaging, testing, and mobile framework experience.

Leads and develops a software engineering team while contributing hands-on to enterprise application design, coding, testing, code reviews, production support, and technical decisions. Builds scalable solutions using C#, ASP.NET, SQL Server, and modern web technologies; partners with product and business stakeholders; supports Agile delivery, CI/CD, troubleshooting, root cause analysis, and engineering best practices. The role also includes mentoring engineers, monitoring delivery and operational metrics, and driving continuous improvement.

Architect and build high-throughput backend systems for Filevine’s legal technology platform using .NET, DDD, event sourcing, MartenDB, Wolverine, and PostgreSQL. Own features end to end, including domain modeling, APIs, testing, observability, CI/CD, and production monitoring. Mentor engineers, optimize system resilience and performance, and collaborate with product, UX, and legal experts to translate complex workflows into scalable software.

Design, develop, customize, integrate, test, and deploy Microsoft Dynamics 365 and Power Platform case management solutions. Gather technical requirements, create architectures and implementation plans, support data migration and custom code, conduct client demonstrations, document risks, and improve development and release processes. Collaborate with clients, architects, project leads, and business analysts while traveling to customer locations as needed.

Design, develop, and deploy Microsoft Dynamics 365 and Power Platform case management solutions. Responsibilities include requirements gathering, architecture, CRM customization, integrations, data migration, testing, technical documentation, client demonstrations, risk mitigation, and improving development and release processes.

Develop and implement enterprise Microsoft Dynamics 365 and Power Platform case management solutions. Responsibilities include gathering requirements, designing architectures, building integrations and customizations, managing data migration, testing and deployment, creating technical documentation, mitigating risks, and presenting solutions to clients. The role collaborates with project leads, architects, business analysts, and customers, with travel to customer locations as needed.

Build edge-focused full-stack product experiences integrating machine learning and autonomy for frontline defense users. Collaborate with designers, infrastructure teams, product teams, and ML engineers to create intuitive applications, efficient edge-deployed application stacks, and internal modeling APIs. Develop maintainable software using strong engineering practices, including design documents, code reviews, and style guides.

Leads cross-functional software development efforts, including architecture, design, development, testing, deployment, support, code reviews, and technical problem resolution. Mentors developers, establishes coding standards, improves system scalability and availability, manages source code, promotes unit testing, estimates work, and supports Scrum team delivery. The role requires .NET, web development, APIs, microservices, distributed systems, cloud, databases, and software testing experience.

Supports and enhances software, data, reporting, integration, and internal systems. Responsibilities include troubleshooting applications and data pipelines, maintaining SQL and Power BI environments, writing code, debugging APIs, supporting deployments and incident response, documenting solutions, working helpdesk tickets, and applying approved AI tools securely. Collaborates with engineers, analysts, developers, and business stakeholders to resolve issues, automate work, improve systems, and reduce operational burden.

Build and lead high-performance browser features in modern C++ and Chromium, including tracker blocking, subscription integrations, and responsiveness monitoring. Own complex projects from proposal through post-mortem, solve ambiguous technical problems, make architecture decisions, collaborate asynchronously with product and design, and use metrics to evaluate outcomes in a large-scale consumer codebase.

Develop and maintain cross-platform build, packaging, and release pipelines for AAA games across consoles and mobile platforms. Bring engines up on new hardware, manage SDK upgrades, resolve low-level crashes and memory issues, and evolve internal tools for profiling, metrics, and data packaging. Lead infrastructure modernization, maintain build automation, and coordinate branch integration across engineering, QA, and production teams.

Designs, develops, tests, documents, and integrates algorithms and software for intraoperative neuromonitoring medical devices. Responsibilities include machine learning model development using clinical data, software architecture, application development, root-cause analysis, cross-functional product collaboration, and full lifecycle ownership of algorithm projects. The role requires compliance with FDA regulations, ISO 13485, and related medical-device standards, with travel up to 10%.

Develops, tests, documents, enhances, and maintains software solutions using Appian and related technologies. Designs integrations with external systems, resolves technical issues, remediates security vulnerabilities, improves performance, participates in requirements analysis and Agile development processes, and documents standards. The role also contributes to planning, mentors other engineers, collaborates with team members, and stays current with software development practices and technologies.

Lead the DevOps team’s technical vision and roadmap for WWE 2K. Design and improve CI/CD pipelines, infrastructure, deployment automation, developer tooling, and environments across Windows and Linux. Ensure reliability, scalability, observability, and performance while establishing deployment and operational standards. Collaborate across studios and disciplines, improve workflows and documentation, and provide technical leadership in a distributed, multi-team game development environment.

Designs, develops, maintains, and supports software applications focused on HIPAA EDI transactions for dental and vision healthcare benefits. Responsibilities include Agile development, production issue triage, technical investigation, secure coding, unit testing, architecture and impact analysis, documentation, and implementing newly legislated EDI standards. The role also serves as a subsystem subject matter expert and uses AI tools responsibly.

Develop and enhance IEM’s Infor SyteLine ERP system through the full software development lifecycle. Responsibilities include gathering requirements, coding in Infor Mongoose, VB.NET, and C#, developing SQL-based reports, testing, documentation, upgrades, troubleshooting, end-user support, and training. The role also supports system conversions, maintains applications, and collaborates on ERP solutions involving manufacturing and accounting processes.

Lead technical ownership of InfiniBand and GPU interconnect fabric operations for hyperscale AI supercomputers. Drive incident response, deep multi-layer debugging across hardware/firmware/drivers/OS, and define failure models, playbooks, telemetry, and automation to improve reliability, observability, and scalability of GPU clusters and platform SLAs.

Leads development of scalable backend systems and applications for the Mindbody ecosystem. Responsibilities include designing APIs and microservices, owning complex technical projects, collaborating with Product, Design, and QA, promoting engineering best practices, mentoring engineers, conducting code reviews and interviews, and leading incident postmortems. The role requires strong software architecture experience, large-scale SaaS development, cloud and database expertise, and effective cross-functional leadership.

Owns the design, development, testing, deployment, and maintenance of production software. Builds C#/.NET backend services, Angular web applications, and .NET MAUI mobile apps; optimizes SQL Server databases; resolves production issues; improves reliability, security, performance, and observability; writes tests and documentation; participates in code reviews; and translates ambiguous business needs into maintainable technical solutions.

Lead a development team while remaining hands-on in full-stack engineering. Design, build, test, deploy, and support secure web applications using C#/.NET, Angular, databases, and AWS. Drive cloud migrations, architecture, CI/CD automation, application security, troubleshooting, performance and cost optimization. Mentor developers, establish engineering standards, lead technical delivery, and collaborate with product, data, DevOps, and architecture teams.