Top C# Jobs in San Diego, CA

Develop and deploy customer-focused web, mobile, and backend applications across the full software stack. Design major features, contribute to architecture decisions, conduct code reviews, and ensure secure, high-quality implementations. Collaborate with stakeholders and cross-functional teams using Agile and SDLC practices. Manage version control, CI/CD, environments, and releases; maintain automated test coverage and perform root-cause analysis. Build and optimize relational data solutions using SQL Server, including complex queries, stored procedures, and performance tuning.

Software engineering interns develop code, resolve critical problems, and improve system stability and resilience on defense-related projects. Interns collaborate with experienced engineers, contribute to real-world customer solutions, and gain exposure to frontend, backend, cloud, DevOps, database, image processing, machine learning, and GIS technologies through BAE Systems’ LEAP summer 2027 program.

Lead and mentor the software engineering team responsible for PSA Set Registry, a large-scale consumer web and mobile product. Drive architecture, development, delivery, code quality, release management, production troubleshooting, and technical strategy. Partner with product, design, and business teams to translate requirements into scalable solutions while promoting agile practices, collaboration, continuous learning, and an inclusive engineering culture.

Develop server-side poker game features and gameplay functionality in Go for high-performance, large-scale applications. Build and integrate REST and gRPC APIs, SDKs, tools, and technologies; extend core systems; contribute to architecture, security, scalability, testing, and operations. Collaborate with engineers and cross-functional stakeholders, participate in long-term initiatives, review code, improve processes, and deliver solutions for live mobile game titles.

Develop and implement computational design, BIM automation, and data-driven workflows for complex building projects. Build and validate Revit-integrated prototypes using tools such as Dynamo, Grasshopper, Python, C#, and the Revit API. Collaborate with architecture, engineering, digital delivery, IT, and project teams to improve coordination, documentation, QA/QC, and design efficiency. Measure automation value, document workflows, support scalable deployment, and communicate outcomes to project and firm leadership.

Leads architecture and hands-on development of scalable backend systems and APIs supporting real-time applications. Owns the engineering lifecycle, writes high-performance code, establishes testing and reliability practices, resolves production issues, guides technical roadmaps, collaborates cross-functionally, and mentors engineers. The role requires expertise in object-oriented backend development, distributed cloud systems, automated testing, system monitoring, and technical leadership.

Lead design and implementation of modernized insurance underwriting and policy administration solutions. Drive cloud transformation, data-driven and secure architectures, improve risk selection and claims resolution, enhance customer experience through automation, mentor technical teams, manage client relationships, and oversee project lifecycle, budgets, and delivery quality.

Build and maintain internal applications, dashboards, workflow automations, APIs, and integrations under senior engineering guidance. Responsibilities include SQL development, C# API support, AI-assisted workflow implementation, testing, debugging, documentation, monitoring, incident triage, data validation, and stakeholder collaboration.

Builds production-grade internal tools, dashboards, automations, AI workflows, APIs, and C#/.NET integration layers for banking operations. Partners directly with business stakeholders to identify workflow improvements, designs Microsoft SQL Server schemas, integrates LLMs, and owns solutions from prototype through deployment and maintenance. The role also involves code reviews, technical decision-making, rapid iteration, and compliance with banking security and governance requirements.

Ensures software and system quality across engineering programs by defining quality objectives, monitoring processes, witnessing qualification and acceptance testing, conducting audits, tracking anomalies and corrective actions, evaluating suppliers, reviewing engineering artifacts, and assessing requirements traceability. The role also supports metrics reporting, software code reviews, mission assurance, and compliance with quality standards. A Secret clearance is required, with eligibility to obtain clearance accepted.

Develop and deploy slot-game features in Unity and C#, including gameplay, UI/UX, engine systems, and creator tools. Build server-backend functionality, investigate and extend slot-engine systems, define technical tasks, and quickly resolve bugs. The role requires collaboration, strong communication, and delivery under deadlines, with opportunities to work on live mobile games and performance optimization.

Leads enterprise HDD qualification for Azure-scale deployments, translating requirements into validation strategies and automated test suites. Analyzes failures using traces, logs, telemetry, and diagnostics; partners with suppliers on debugging and corrective actions; drives reliability, security, performance, interoperability, and serviceability improvements. Coordinates cross-functional technical initiatives, advances qualification methodologies, influences industry standards, and mentors engineers.

Lead the architecture, engineering, sustainment, modernization, integration, testing, and troubleshooting of Department of Defense tactical networks. Develop Linux-based software solutions, analyze system deficiencies, perform root-cause analysis, manage configuration changes, and support Agile DevOps delivery. The role includes technical documentation, reviews, presentations, partner coordination, and deployment across classified environments. Up to 10% domestic and international travel, occasional off-hours support, and periodic onsite work in San Diego or Virginia Beach are required.

Develops and executes automated tests validating digital, analog, RF, power, module, and system-level radio hardware. Responsibilities include test infrastructure and sequencer development, programming APIs and user interfaces, test equipment operation, performance characterization, data analysis, debugging, documentation, and collaboration with design and systems engineering teams.

Leads a software development team and manages an enterprise application portfolio for a digital banking platform. Responsibilities include architecting requirements and solutions, developing and integrating APIs, improving security and performance, supporting continuous integration and code quality, refactoring code, collaborating with IT leadership and development managers, and driving development capability improvements. The role requires hands-on full-stack .NET expertise, technical leadership, Agile experience, and financial services knowledge.

Designs, develops, tests, integrates, deploys, and sustains secure software for distributed, disconnected, intermittent, and low-bandwidth DoD environments. Responsibilities include building APIs and modern architectures, maintaining CI/CD and DevSecOps security gates, deploying to Kubernetes and cloud environments, integrating cross-domain systems, troubleshooting operational issues, supporting acceptance testing and fielding, and producing technical documentation. The role collaborates with engineering, cybersecurity, platform, government, and mission stakeholders across classified and unclassified environments.

Designs, develops, and executes comprehensive testing for C# thick-client, web, cloud, bioinformatics, and hardware-integrated software. Responsibilities include functional, regression, integration, and performance testing; defect tracking in Azure DevOps; test automation; pull request reviews; cross-functional collaboration; and improving QA processes. The role also ensures software quality standards and industry compliance.

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.

Design, build, and operate cloud-native, enterprise-grade SaaS services on Azure. Lead architecture and design, develop APIs and UIs, apply AI-enabled engineering tools, ensure observability, support production incidents, and drive reliability, performance, and CI/CD improvements across teams.

Supports client-facing technical issues, escalates bugs, monitors production systems, troubleshoots web and email problems, updates backend data, and contributes to software features, data pipelines, APIs, and responsive applications. Works cross-functionally with Engineering, Product, QA, and Data teams while developing skills in web technologies, SQL, cloud environments, accessibility, and generative AI.

Volunteer Principal Full Stack Engineer to lead and contribute across frontend and backend (React/React Native, Node.js, MongoDB). Own feature development, mentor engineers, collaborate with product/design, ship scalable code, and support CI processes. Must commit 4+ hours weekly and attend a weekly standup; first task includes launching a fundraising campaign.

Define technical direction for hyperscale Azure Storage components; architect, develop, test, and support highly scalable, secure, compliant, and highly available cloud services. Lead multiple engineering projects, improve reliability, scalability, performance, consistency, and observability, and apply AIOps for incident detection, root-cause analysis, and operational excellence.

Leads the enterprise architecture practice and owns the organization’s three- to five-year technology vision, strategy, governance, and roadmaps. Advises executives and the board on technology investments, risk, architecture, and major partnerships. Oversees architecture standards, cross-domain decision-making, technology evaluations, due diligence, and platform strategy. Mentors architects across application, data, infrastructure, security, and enterprise domains while advancing organizational architecture maturity, scalability, compliance, security, and cost efficiency.

Volunteer senior developer to design, build, and maintain a cross-platform medical scheduling app (web, iOS, Android). Participate across the full development lifecycle: design, coding, testing, CI, deployments, code reviews, production support, incident management, and platform architecture. Attend weekly standups and commit at least four hours per week.