Top Remote C# Jobs in San Diego, CA

Design, develop, and improve scalable software for an investment platform. Lead software development across the lifecycle, mentor junior engineers, solve complex technical problems, maintain code quality through testing and reviews, and recommend technology enhancements. The role is remote in the USA with four in-person retreats annually.

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

Build and maintain low-latency connectivity APIs and integrations with crypto exchanges, OTC desks, brokers, and other trading venues. Develop order routing, trade execution, and real-time data ingestion systems using REST, WebSocket, and FIX. Monitor connections and data pipelines, improve reliability and observability with Grafana and Prometheus, collaborate on exchange onboarding, and create automated tests for production readiness.

The Lead Technology Engineer will lead IT systems implementation, ensure network security, manage integrations, and enhance operational efficiency through automation.

Builds and maintains custom software applications using .NET, Java, and JavaScript technologies. Responsibilities include software design, coding, debugging, testing, troubleshooting, and developing web-based and client-server systems. The role handles complex technical projects autonomously, may provide technical consultation and team leadership, and requires strong collaboration and communication skills. Travel up to 15% is expected.

Builds and maintains custom software applications, performing design, coding, debugging, testing, troubleshooting, and technical consultation. Works autonomously on advanced projects, may lead work groups, and follows coding standards and technical designs. The role supports web-based and client-server systems and requires strong collaboration and communication. Up to 15% travel is expected.

Lead the architecture and development of Green Dot’s cloud-native Banking as a Service platform. Design scalable APIs, microservices, event-driven systems, and integrations; guide CI/CD, testing, observability, security, and compliance practices; lead incident response and architectural decisions; reduce technical debt; mentor engineers; and partner with product and engineering teams to deliver reliable banking and payment solutions.

Leads the design, development, and implementation of full-stack applications using C#, .NET, Angular, Azure, and SQL Server. Collaborates with cross-functional teams, ensures application security, performance, and scalability, applies Git-based version control practices, mentors developers, and stays current with emerging technologies.

Lead and scale a lending engineering team responsible for reliable, secure, distributed financial infrastructure. Responsibilities include hiring and mentoring engineers, setting technical strategy, making architecture decisions, partnering with Product, overseeing delivery, and promoting testing, CI/CD, monitoring, incident response, and continuous improvement. The role requires backend development, cloud and event-driven systems experience, and a strong record of leading high-performing engineering teams.

Perform manual and automated testing for lending applications and services. Develop and maintain test automation, write functional, regression, and API test cases, participate in test planning and defect triage, and track issues through resolution. Collaborate with internal and external teams to ensure reliable, scalable, and performant software while contributing to a quality-focused engineering culture.

Develop scalable backend software for lending infrastructure supporting loan origination, funding, servicing, and sales. Responsibilities include designing software modules, writing and testing maintainable code, building distributed and event-driven systems, participating in code reviews, and collaborating with senior engineers and cross-functional teams. The role uses C# or Python, relational and document databases, AWS, Docker, and Kubernetes, with emphasis on reliable, compliant financial technology.

Design and develop scalable enterprise software for the Lending team. Build backend systems using .NET, Python, relational and NoSQL databases, messaging systems, Docker, and AWS. Plan, triage, and prioritize work while applying object-oriented programming, SOLID principles, domain-driven design, distributed systems, and event-driven architecture practices.

Build and operate full-stack certificate management, security, monitoring, and vulnerability products. Develop TypeScript APIs and React frontends, design MySQL schemas, manage AWS workers and Kubernetes infrastructure, maintain legacy .NET and Python services, integrate partner APIs, improve CI/CD and observability, participate in on-call support, and develop AI-assisted features. The role includes code reviews, testing, incident resolution, technical documentation, and mentoring engineers.

Develops, tests, supports, and maintains scalable web applications and software components across front-end and back-end technology stacks. Partners with Product Management to design solutions, contributes to Agile planning and architecture, troubleshoots deployed products, reduces technical debt, and provides technical guidance to less experienced engineers.

Develop and support software applications, REST and ASP.NET web services, distributed systems, data integrations, and storage solutions. Analyze requirements, optimize performance, resolve application issues, implement security and data protection, and collaborate with product, business, and QA teams. The role includes technical documentation, quality reviews, managing competing priorities, and mentoring less experienced developers.

Lead technical delivery for Life Insurance and Annuity clients: design solutions and architectures, produce technical design docs, mentor distributed teams, drive code quality and integrations (APIs), maintain mainframe and .NET codebases (COBOL, C#, DB2/SQL), and leverage AI tools (GitHub Copilot, Claude Code, custom agents) for automation and efficiency.

Designs and executes manual and automated testing across applications, APIs, databases, data platforms, and integrated systems. Builds QA automation frameworks, validates data quality, manages test environments, supports CI/CD test integration, tracks defects, and performs root cause analysis. Collaborates with Agile engineering teams on sprint planning, releases, and process improvements while testing healthcare technology platforms and regulated workflows.

Develop and maintain cloud-based healthcare revenue-cycle software, build new features, modernize applications, perform code reviews and automated testing, address security vulnerabilities, troubleshoot production issues, and improve system performance. Collaborate with developers, product owners, support teams, and project leadership while applying Agile, CI/CD, TDD, and software development best practices.

Owns enterprise integration architecture across data and application systems. Defines integration standards, designs and builds complex integrations, creates reusable reference architectures, leads strategic architecture programs, modernizes legacy ESB and point-to-point systems, and governs security, reliability, observability, and data integrity. The role also coaches engineers and advises technical and business stakeholders across global teams.

Build and lead a scalable platform engineering function spanning CI/CD, infrastructure, observability, developer tooling, environments, and production operations. Develop internal tools, reusable automation, paved roads, and AI-assisted workflows that improve developer experience, delivery reliability, and engineering productivity. Partner across teams, guide architecture and standards, measure DORA and DX metrics, and shape the platform roadmap while providing hands-on technical leadership.

Develops, implements, maintains, tests, and troubleshoots software applications supporting company systems. Collaborates with business analysts and lead developers to analyze requirements, design solutions, document functionality, conduct code reviews, support QA and deployments, manage version-controlled code, and resolve production defects. The role participates in software development projects, communicates progress, and provides on-call night support.

Deploys, integrates, hardens, and operates modular C-UAS data and software platforms in secure DoD environments. Builds data pipelines across classification boundaries and disconnected conditions, integrates mission systems, manages Kubernetes-based infrastructure, supports accreditation, and handles observability, incident response, upgrades, and backup recovery. The role also documents solutions, trains mission teams, represents field needs to engineering, and mentors junior forward-deployed data engineers. Most work is remote with occasional travel to restricted environments and SCIFs.

Develops coherent optical subsystem and manufacturing test solutions onsite. Responsibilities include configuring test instrumentation, supporting automated manufacturing test infrastructure, and developing .NET applications. Requires experience with optical and electrical test equipment, electronics schematics, VB or C# object-oriented programming, and SQL Server databases. Azure DevOps experience, analytical skills, and strong communication are preferred.

Leads platform engineering across learner and enterprise products, setting architecture direction, integrating AI and data capabilities, managing engineering managers and teams, and improving quality, reliability, security, accessibility, and delivery. Partners with product, design, IT, cloud operations, sales, and executives on strategy, planning, budgets, and enterprise SaaS outcomes.

Develop and maintain software using C#, .NET, web technologies, SQL Server, and AWS. Participate in the full SDLC and Agile Scrum processes, including design, development, unit testing, defect resolution, backlog refinement, and collaboration with product and QA teams. Build solutions using Microsoft-stack technologies, optimize databases and stored procedures, and support cloud-based application delivery.