Top C# Jobs in San Diego, CA

Designs cloud solutions for federal customers, leads technical proposal development, translates agency requirements into architectures, and builds cloud proofs of concept. Responsibilities include infrastructure as code, containers, Kubernetes, CI/CD, data and AI/ML pipelines, technical workshops, cloud cost modeling, compliance with FedRAMP and ATO requirements, customer presentations, and transitioning successful prototypes to delivery teams.

Leads the design, development, deployment, maintenance, and optimization of scalable full-stack software systems. Responsibilities include coding, debugging, code reviews, API development, cloud-native deployment, testing, monitoring, performance optimization, production support, incident response, technical mentoring, and establishing development standards. The role collaborates cross-functionally, drives API-first and AI-enabled engineering practices, and participates in on-call support.

Develop scalable, secure, performant web applications and data pipelines for healthcare technology. Partner with engineering, product, and business stakeholders on technical roadmaps, use Agile practices, improve observability and reliability, and mentor junior engineers through coaching and code reviews. Responsibilities include database querying, technical decision-making, API development, data ingestion, cloud technologies, containerization, CI/CD, and handling sensitive data.

Own full-stack features end to end, including system design, implementation direction, testing, deployment, production operations, and incident response. Use agentic AI to generate code, tests, and reviews while validating quality and security. Build production APIs, data models, authentication, schemas, migrations, and scalable SQL. Collaborate with Product, Design, and DevOps, and apply secure coding practices. Bonus experience includes RAG, LLM evaluation and observability, or TypeScript frontend development.

Designs, builds, and maintains scalable backend services, APIs, databases, data flows, and infrastructure. Leads complex features from design through deployment while improving performance, observability, security, testing, and reliability. Integrates third-party platforms, supports cloud infrastructure and CI/CD practices, and mentors engineers through technical guidance and knowledge sharing.

Develops, tests, maintains, and enhances software applications throughout the production lifecycle. Responsibilities include coding, performance testing, debugging, documentation, project planning, code reviews, mentoring, end-user training, and researching development technologies. The role supports cloud-native, API-first, microservice, CI/CD, and DevOps practices while collaborating with IT teams and business stakeholders.

Designs scalable, production-grade architectures for enterprise applications, distributed systems, cloud platforms, APIs, integrations, and data flows. Defines architectural standards, evaluates technology trade-offs, and guides cloud engineering, modernization, CI/CD, infrastructure as code, observability, security, and reliability practices. Provides technical leadership through design reviews, mentoring, client collaboration, solution shaping, and technical planning while supporting scalable and maintainable software delivery.

Leads and mentors the AgentMate application development team while remaining hands-on with C#/.NET development. Owns engineering execution, application security, PCI compliance, reliability, quality, observability, technical debt, and production support. Partners with Product, Delivery, Infrastructure, Security, QA, and business stakeholders to deliver secure, scalable applications. Responsibilities include architecture and coding, threat modeling, vulnerability remediation, CI/CD improvements, incident resolution, technical planning, documentation, hiring, and team development.

Owns end-to-end development and support of the Sage 300 ERP ecosystem, including customizations, .NET and Python applications, legacy VB6 maintenance, third-party integrations, SQL Server database design and optimization, reporting, and BI solutions. Collaborates with business and technical stakeholders, contributes to architecture, mentors junior developers, improves processes, documents solutions, and resolves production issues.

Develop and maintain high-volume, mission-critical enterprise web applications using C#/.NET, ASP.NET MVC, AngularJS, and SQL Server. Responsibilities include full lifecycle development, architecture and design participation, troubleshooting, performance and scalability improvements, AI-assisted workflow development, Agile collaboration, technical mentoring, and supporting multi-tier systems.

Lead end-to-end design, development, deployment, testing, and production support of enterprise web applications. Build scalable client/server architectures, ensure security and data governance, mentor team members, collaborate with product and business stakeholders, and own timely delivery and quality of solutions. Analyze data patterns and support reporting and selection workflows.

Designs, develops, and sustains secure REST APIs, ETL pipelines, middleware, event-driven integrations, and data validation services for DoD modernization. Optimizes schemas and data workflows, manages API gateways, monitors performance, troubleshoots synchronization issues, and ensures interoperability across IL2-IL5 cloud environments. Collaborates with cybersecurity, database, and Agile teams to meet DoD RMF, STIG, Zero Trust, and data governance requirements while maintaining integration documentation and supporting deployment validation.

Leads Agile development and sustainment of secure data integration solutions for DoD systems. Responsibilities include RESTful API design, data migration and validation, database optimization, data pipelines, analytics dashboards, integration testing, DoD compliance, CI/CD support, documentation, and mentoring. The role collaborates with cybersecurity teams on RMF and STIG controls while guiding technical delivery and Agile ceremonies in AWS GovCloud environments.

Develop and sustain a secure enterprise Case Management System for DoD stakeholders. Responsibilities include building CMS components, microservices, API integrations, workflow automation, and AWS GovCloud software; implementing DevSecOps and CI/CD; conducting code reviews, testing, data validation, and documentation; supporting Agile delivery; ensuring DISA STIG and RMF compliance; and providing Tier 2/3 production support.

Lead end-to-end development of secure, scalable web applications and data solutions supporting clinical trial operations. Design frontend and backend components using C#/.NET, Angular, AWS, and relational or non-relational databases. Guide architecture, testing, deployment, CI/CD, security, cloud optimization, and regulatory compliance. Mentor developers, oversee technical delivery, troubleshoot complex issues, and lead migration and modernization of on-premises applications to AWS.

Designs and governs cloud architectures for a global software platform supporting scientific laboratory applications. Responsibilities include AWS architecture, security, DevSecOps, Terraform infrastructure as code, regulatory compliance, testing strategy, technical proofs of concept, stakeholder communication, engineering guidance, and mentoring. Requires strong C#/.NET Core and web development experience, AWS certification, architecture-framework knowledge, and familiarity with databases, application servers, and LC/LCMS systems.

The Quantitative Developer will assist with client onboarding, support, implement and maintain new functionality for portfolio compliance, and improve team documentation.

Develop, test, debug, and maintain game software for console, PC, and mobile platforms. Collaborate with artists, designers, and engineers to define and implement features, deliver systems to specification, provide ongoing technical support, and balance scope, quality, and development pace.

Supports Microsoft Dynamics 365 CRM and Power Platform administration, development, automation, troubleshooting, and user support. Builds and maintains Power Apps, Power Automate workflows, Power BI reports, dashboards, dataflows, and Fabric Lakehouse structures. Assists with requirements gathering, testing, documentation, data quality, and process improvement while collaborating with business stakeholders and senior technology staff. This remote role includes limited travel and focuses on improving organizational efficiency, reporting, customer experience, and business applications.

Lead architecture and hands-on development of the end-to-end video pipeline (live ingest, transcoding, storage, playback, and developer SDKs). Mentor engineers, collaborate across mobile/web/ML/platform teams, own monitoring and on-call support, and help scale video streaming and VoD capabilities for millions of streams and clips.

Design, develop, and field high-performance Ground Control Station and C2 software using C++/Qt/QML and QGroundControl. Lead architecture and technical direction, mentor engineers, define APIs/ICDs, debug integration/latency issues, support field tests, implement post-mission debrief tools, and ensure interoperability with C2 standards.

Develops software solutions using React and TypeScript, writes clean reusable code, contributes to major React projects, and uses Git for version control. The role supports a Navy customer in a digital transformation environment and may involve front-end and back-end technologies, Scrum practices, databases, and agile delivery. A US Secret security clearance must be obtainable.

Develop and maintain clean, reusable software using React and TypeScript. Contribute to front-end and back-end solutions, collaborate in an agile Scrum environment, use Git for version control, solve complex technical problems, and potentially lead development teams. The role supports a Navy customer and requires the ability to obtain a US Secret security clearance.

Evaluate AI coding-agent interactions for usefulness, correctness, engineering judgment, reasoning quality, and developer trust. Provide clear, opinionated feedback, distinguish response-quality levels, and help define standards for excellent interactions with tools such as OpenAI Codex, Claude Code, and Cursor. This contract role requires staff- or principal-level software engineering experience and familiarity with modern AI-assisted development workflows.

Develop Canvas and Model-Driven Power Apps for web and mobile, automate workflows with Power Automate, and integrate data from Dataverse, SharePoint, SQL Server, and external APIs. Build Power BI dashboards, troubleshoot performance and bugs, manage security roles, gather requirements, train users, and maintain applications. The role also involves Power FX and optional pro-code development using JavaScript, HTML, CSS, or C#.