Top Entry Level C# Jobs in San Diego, CA

Develop, debug, integrate, and test software and complex software/hardware systems for intelligence and defense customers. Work with Java, AI/ML services, software design, and agile multidisciplinary teams. Support requirements and regression testing, product demonstrations, software installation, and system testing, with possible business travel. Participate in a structured first-year engineering development and mentorship program.

Develop and maintain full-stack healthcare applications using C#, .NET, ASP.NET Core, JavaScript, and SQL Server. Design APIs, services, background jobs, database procedures, and responsive interfaces; troubleshoot across application and deployment layers; write automated tests; modernize legacy systems; build secure healthcare integrations; and protect sensitive data. Collaborate with product, QA, support, and implementation teams while participating in design reviews, code reviews, testing, and release validation.

Build small game projects and interactive scenes in a major game engine for AI assessment tasks. Create realistic gameplay bugs and multifaceted feature challenges, write clear task briefs and success criteria, develop reference solutions, and conduct thorough playtesting. Candidates should have game development experience, a strong portfolio, proficiency in Unity, Godot, or Unreal, familiarity with relevant scripting languages, debugging skills, and strong technical writing ability.

Designs and delivers Amazon Connect and Salesforce contact center solutions for enterprise customers. Leads discovery, technology assessments, ROI development, architecture, integrations, and cloud deployment discussions. Translates business requirements into contact center designs, oversees technical teams, manages stakeholder communications, and ensures projects meet quality, budget, and timeline goals. Provides customer training and documentation while guiding cloud infrastructure, automation, monitoring, security, and compliance practices.

As an AWS Solution Architect, you'll design and implement Amazon Connect solutions, improve customer processes, lead technical teams, and educate clients on AWS value.

Develop and maintain automated test scripts, execute manual and automated testing, analyze results, identify and track defects, and perform regression testing. Collaborate with developers and distributed teams throughout the software development lifecycle to ensure application quality and testability. The role also involves using and validating approved AI-assisted tools for coding, testing, debugging, documentation, and technical research.

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.

Build and support Ivanti’s global corporate website and digital experiences across the full web stack. Develop responsive, accessible front-end experiences and C#/.NET applications, CMS components, APIs, integrations, databases, and deployment pipelines. Collaborate with Creative and Marketing, implement analytics and privacy tooling, troubleshoot complex production issues, and manage projects from estimation through launch and support. Use AI coding tools while maintaining quality, security, performance, and maintainability.

Develop and maintain macOS systems software using modern C++, Swift, and Objective-C++. Work with process models, IPC, Endpoint Security, Network Extension, security and cryptography APIs, device and storage frameworks, packaging, deployment, and MDM tooling. Profile and debug performance using Instruments, LLDB, os_log, and os_signpost, while creating tests with XCTest, sanitizers, fuzzing, and xcodebuild CI. Support shared codebases across macOS, Windows, and Linux.

Develop and maintain cross-platform macOS systems software using modern C++, Swift, and Objective-C++. Work with IPC, daemons, system extensions, network and endpoint security, device and storage APIs, code signing, packaging, and deployment. Profile and debug performance issues, build automated tests and CI pipelines, and support Apple Silicon and Intel systems. Nice-to-have experience includes SwiftUI, AppKit, macOS beta testing, and shipping EDR, antivirus, network security, or device-management products.

Design and build complex customer-facing product features, own technical decisions, contribute to architecture and technical direction, uphold code quality, mentor engineers, and support production incidents. The role collaborates closely with Product and Design across a modern web stack including React, TypeScript, Node.js, .NET, relational databases, and Microsoft Azure.

Lead the engineering team building Arcnine, Tradeify’s real-time trading platform from development through launch. Hire and develop engineers, guide architecture, partner with Product and Design, remain hands-on with code, establish quality and delivery practices, and own reliability, observability, and incident response. The role also contributes to company-wide engineering standards and communicates progress, risks, and needs to founders and cross-functional stakeholders.

Own end-to-end deployments of Prividium for institutional financial customers, including integration code, permissioning, node topology, upgrades, and operational runbooks. Build reference applications for collateral, tokenized deposits, and settlement. Operate production infrastructure through an on-call rotation, troubleshoot incidents, and convert deployment learnings into platform improvements. Collaborate with product, sales, core engineering, and customer teams while working across regulated banking systems or crypto infrastructure.

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

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.

Lead the Windows engineering team responsible for ProPresenter desktop software. Own hiring, coaching, performance management, team health, delivery, throughput, cross-functional execution, and continuous process improvement. Provide technical judgment on C#/.NET desktop development and native interop while partnering with product, design, QA, support, and other engineering teams. Promote high-quality, maintainable software, effective AI-assisted development, and outcomes that serve live production operators.

Execute scheduled, ad hoc, and release-milestone software tests; review test cases; report defects in issue-tracking systems; communicate status in standups; and collaborate with software test managers and development teams. The role requires knowledge of QA methodologies, black-box, grey-box, and white-box testing, strong communication and organization, independent and team-based work, and participation in planning and professional meetings.

Perform civil/structural engineering and design tasks for power plant upgrades and new projects under senior supervision. Assist with calculations, modifications, equipment walkdowns, and design changes to improve plant performance, safety, and reliability. Work involves field and office duties, travel to client sites, and maintaining unescorted nuclear plant access.