Top C# Jobs in San Diego, CA

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.

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.

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.

Full Stack Software Developer responsible for designing, building, testing, and deploying scalable member-facing and internal applications. Work includes building APIs, database components, cloud-native solutions, CI/CD pipelines, and adopting AI-assisted development practices while collaborating in an Agile environment to improve member digital experiences.

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.

Support partner developers through integrations and Beta launches, provide escalated technical support, manage partner integration releases and documentation, collaborate with engineering to prioritize features, and coach team members while upholding company values and processes.

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.

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.

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 and grow an 8-10 person engineering team to design, build, and operate a multi-cloud data plane platform. Drive roadmap, delivery, release readiness, operational excellence, CI/CD, observability, incident management, and cross-functional partnerships with Product, Security, Infrastructure, and SRE.

Join Azure PostgreSQL to design, implement, and test features in a relational database engine (query processing, logging, storage, IO, scale-out). Collaborate with stakeholders, write maintainable code, define test plans, operate live services (on-call), and contribute to open-source PostgreSQL and Linux.

Serve as a technical implementation lead for Hancock Cloud: onboard clients, configure and validate software, support and diagnose issues, create documentation and training, run data imports and scripting, coordinate tasks, and translate business needs into technical specifications.

Design, build, and maintain CRM+ features using C#, .NET, Vue, and SQL Server on Azure. Architect scalable services, use AI tools (Claude Code) in development, write well-tested code, mentor engineers, influence product and technical strategy, operate CI/CD, troubleshoot production issues, and collaborate cross-functionally.

Lead end-to-end customer rollouts of an AI-native planning platform: build and maintain data integrations, create performant financial models, develop AI-driven automated test harnesses, resolve data and performance issues, ship product fixes, and partner with finance stakeholders to operationalize solutions and feed product improvements back into engineering.

Lead design and delivery of cloud-native .NET services for a high-throughput trading platform. Own end-to-end systems, drive architecture and reliability, mentor engineers, participate in on-call and incident response, and occasionally contribute to React/TypeScript frontend work while establishing engineering standards and observability.

Lead full lifecycle development of high-volume enterprise web applications using C#/.NET and AngularJS. Contribute to architecture and design, develop and test scalable solutions, troubleshoot production issues, mentor developers, and collaborate with analysts and business stakeholders in an Agile/Scrum environment.

Lead design and rewrite of cloud-native core systems. Build scalable back-end services and front-end features, drive architecture and testing discussions, mentor engineers, and improve telemetry, performance, and reliability.

Senior full-stack engineer building scalable, cloud-native .NET Core applications. Own and enhance core systems, lead architecture and testing discussions, collaborate with cross-functional teams, work on frontend frameworks (React/Node), telemetry, performance tuning, and cloud deployments (Kubernetes/AWS).

Build and maintain scalable, cloud-native APIs using .NET. Enhance core platform components, lead architecture and testing discussions, optimize telemetry and performance, collaborate cross-functionally, conduct code reviews, and mentor team members.

Design, program, test, and commission PLC and SCADA systems (Siemens and/or Rockwell) for cooling and mechanical plant equipment. Build supervisory logic, SCADA/HMI, safety interlocks, integrate OEM equipment via industrial protocols, create digital twins, lead field commissioning, and develop surrounding software, data pipelines, and tooling.

Develop user interface components for ArcGIS Pro using C# and WPF, work in an agile team, and design software solutions for raster and imagery processing.

Develop and design web applications, working within an agile team to continuously improve features and deliver high-quality software while collaborating with project teams.

The Senior QA Engineer will define the test strategy for modernization, build automation suites, ensure quality in CI, and conduct various testing types.

The Senior Software Engineer will develop reliable systems for IoT fleet management, create user interfaces, and support data engineering tasks.