Top C# Jobs in San Diego, CA

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

As a Gameplay Engineer, you'll design and refine networked gameplay systems, iterate on features, and collaborate with designers and back-end engineers.

Develop and integrate game features using Unity, C#, and various APIs while ensuring game performance and quality standards are met.

The C# / .NET Developer will design and maintain middleware applications, build Shopify integrations, and support a mobile app backend in a remote work environment.

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.

Develop and maintain InfoTrack's cloud-based web solution: build backend C#/.NET services, integrate third-party SOAP/REST APIs, design databases, implement full-stack features (React/JS), follow microservices patterns, write tests, collaborate in Agile teams, and recommend product and usability improvements.

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.

As an AWS Technical Architect, you will ensure customer success with Amazon Connect solutions, conduct technology assessments, educate clients on AWS, and manage technical teams. You'll translate customer needs into effective designs, oversee project deliverables, and provide training while driving best practices in contact center design.

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 architecture and hands-on development of cloud-native, microservices-based systems and company-wide integrations (AWS and MuleSoft) using Python. Own provisioning, billing, telemetry, and integration landscapes; define AI-SDLC and AI tooling; implement infrastructure-as-code and CI/CD; ensure observability, testing, security, and operational readiness; translate architecture into Jira work and mentor engineering teams.

The role involves designing CLI and backend services, maintaining code quality, collaborating on technical issues, and writing documentation.

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 back-end development using .NET Core and SQL, contributing to Jibble 2.0 API integrations, and collaborating with product and design teams.

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.

Lead multiple engineering teams owning foundational services (identity, documents, payments, vehicle data). Grow managers and engineers, define strategy and roadmaps, ensure technical quality, compliance, operational readiness, cross-team collaboration, and financial sustainability of services.

Develop and architect scalable cloud-based software for an IoT asset-tracking platform. Responsibilities include translating business requirements into technical designs, leading complex feature development, mentoring engineers, conducting code reviews, promoting engineering best practices, evaluating distributed-system trade-offs, and collaborating with product, operations, and customer success teams.

Lead hands-on architecture and development for a cloud-based IoT asset-tracking platform. Design scalable distributed systems, APIs, data models, and platform components; resolve complex performance and reliability challenges; and champion testing, CI/CD, observability, and security practices. Lead an agile engineering team, manage delivery, mentor and hire engineers, collaborate with Product and Operations, and drive adoption of AI development tools and AI/ML capabilities.

Lead multiple software engineering teams to design, modernize, and support cloud-native and hybrid trading platforms. Drive AWS cloud modernization, architecture reviews, reliability, automation, and engineering best practices. Partner with product, data, infrastructure, and business stakeholders to deliver scalable, resilient, and high-performance solutions while mentoring teams and monitoring operational metrics.

Design, build, and maintain payment integrations and a reconciliation data platform for high-volume restaurant transactions. Implement terminal-to-cloud flows, ingestion pipelines, matching engines, reporting UIs, and payment analytics. Provide technical leadership, documentation, and mentor teammates to ensure reliable settlement and reconciliation.

Lead multi-year technical vision and architecture for Payments, Scheduling, Forms, RCM and mobile platforms. Drive cross-team solutions, evaluate build-vs-buy, mentor senior engineers, set company-wide engineering standards, and ensure scalability, reliability, and observability for high-throughput distributed systems.

Lead and implement security engineering controls across the platform: identify real risks, build secure-by-default libraries and guardrails, enforce least-privilege for services protecting patient data, harden developer machines, and partner with compliance to convert requirements into effective technical controls.

Lead and mentor full-stack engineering teams to design, build, test, deploy, and support scalable client-facing and proprietary software. Drive architecture, technical roadmap, Agile delivery, cloud-native migrations, API integrations, quality metrics, and cross-functional collaboration while balancing hands-on development and people leadership to meet product and business goals.

Build and maintain integrations connecting CoLab to CAD, PLM, and enterprise systems. Design and implement desktop and web capabilities, troubleshoot PLM/CAD workflows, collaborate with Product and Customer Success, and mentor engineers to deliver scalable, reliable engineering lifecycle software.

Manage an overseas Agile sprint team, bridge business and engineering with clear technical requirements, contribute as a senior engineer (architecture, code, reviews), develop cloud-hosted and on‑prem and front-end applications, and perform people, project, and software development management.