csharp jobs in San Diego

Design and build an on-premises AI server system focused on privacy for defense applications, with end-to-end ownership from planning through deployment and production support. You will make all technical decisions and own the system's quality and performance.…See more Required skills include a backend language (Go, Rust, Python, C#/.NET, or Node.js), frontend experience (React or Vue with HTML/CSS/JavaScript), Linux/Docker expertise, and AI/GPU knowledge including LLM and image generation models. U.S. citizenship and ability to obtain a DoD security clearance are mandatory.

Join Aphantic as a Software Engineer to design and develop web-based applications that integrate with custom embedded systems using AI-assisted coding tools. You'll write requirements and test documentation, execute testing, and interface with customers on requirements and design reviews.…See more The role requires 2+ years of professional software engineering experience, proficiency in Python, JavaScript/TypeScript, Go, C/C++, or Rust, Linux systems knowledge, and web-based UI development skills including TLS/HTTPS networking.

Senior Automation Engineer supporting the development, maintenance, and operation of complex custom automation systems in a biotech environment. Responsibilities include understanding system requirements, developing scripted protocols, supporting system integration across hardware and software, troubleshooting failures, and ensuring compliance with FDA regulations and GxP principles.…See more The role requires proficiency in C#, experience with robotics, motion control, machine vision, and strong problem-solving skills to maintain system uptime in a regulated biotech setting.

Associate Software Engineer will develop embedded software for real-time control of advanced tactical radio equipment, applying computer science and mathematical analysis across the full SDLC including requirements, design, implementation, integration, and test. The role requires proficiency in multiple programming languages (C++, C#, C, Java, Python, etc.) and real-time operating systems (VxWorks, Linux, QNX, Integrity, Windows CE) on various processor architectures.…See more Key responsibilities include hardware-software interface development, test procedure creation, modeling and experimental testing, and peer code reviews. Candidates must be pursuing or have recently completed a Bachelor's degree in computer science, computer engineering, software engineering, electrical engineering, or related field.

Senior Embedded Firmware Engineer responsible for designing, developing, and maintaining embedded software for medical and life-science products. You will contribute to firmware architecture, hardware/software interface definition, and participate in code reviews, testing, and design reviews while working with multidisciplinary teams.…See more The role requires strong embedded C/C++ proficiency, experience with formal software development processes, and hands-on debugging across real hardware systems. You'll also provide technical mentorship and help improve software engineering practices within Agile environments.

This role focuses on SQL Server database engineering, including schema design, stored procedures, query optimization, and administration. The engineer will develop business automation solutions using MS Access, VBA, and T-SQL, participate in code reviews, and communicate with technical and non-technical stakeholders.…See more Key responsibilities include ETL and reporting work, Access database development with linked SQL Server tables, and SQL Server Reporting Services and Integration Services implementation.

Design, develop, test, and maintain RPG and CL applications on the IBMi platform, collaborating with business users and IT teams to deliver technical solutions. Responsibilities include developing service programs, stored procedures, and prototypes; troubleshooting and optimizing data-centric applications; resolving production issues; and mentoring junior developers.…See more Strong experience with RPG (all versions), CLLE, service programs, binding directories, and modular RPG design is required, with familiarity with web technologies (HTML, CSS, JavaScript, Node.js, PHP, .NET, Java) preferred.

This R&D internship focuses on designing and implementing automated QA and regression testing frameworks for complex engineering software. The intern will develop test automation solutions integrated with Jenkins CI/CD pipelines, create functional and integration test suites, analyze results, and collaborate with development teams to improve product quality and development efficiency.…See more Required skills include proficiency in modern languages (C#, Python, Java, or C++), understanding of software testing concepts, Git version control, and strong problem-solving abilities.

Design, develop, and deliver software capabilities across the full delivery pipeline—from design through automated testing to production deployment—for secure, mission-critical DoD systems. Code in Python, Java, C#, Go, or C++; implement modern architectural patterns (Microservices, Event-Driven, Serverless); and apply DevSecOps principles with automated security testing (SAST, DAST, SCA, container scanners) as CI/CD quality gates.…See more Requires 5+ years of Agile software development, 2+ years of DevSecOps in regulated government/DoD environments, and 2+ years working with resilient architectures in DDIL and afloat/ashore PaaS environments including Cross-Domain Solutions integration.

Design, develop, and deliver software capabilities across the full delivery pipeline—from design through automated testing to production deployment—for secure, mission-critical DoD systems. Code in Python, Java, C#, Go, or C++, implement modern architectural patterns (Microservices, Event-Driven, Serverless), and manage Git-based workflows.…See more Participate in end-to-end delivery using Agile frameworks (Scrum, Kanban, SAFe) to Kubernetes, cloud, or virtualized environments. Apply DevSecOps principles, configuring automated security testing tools (SAST, DAST, SCA, container scanners) as CI/CD quality gates in regulated government/DoD environments, and maintain resilient architectures for DDIL and PaaS platforms with Cross-Domain Solutions integration.

Sr. Engineer responsible for designing, building, and deploying production-grade AI platforms and solutions centered on LLMs, RAG, and agentic workflows.…See more The role spans full-stack development—from backend services and APIs to cloud-native infrastructure on Kubernetes—with emphasis on enterprise search, retrieval optimization, and AI application integration. Must have strong programming skills across Python, Java, C#/.NET, Rust, TypeScript/JavaScript, and proven experience architecting and operating scalable, production-ready AI systems.

Design, develop, and expand a core SDK and Demo App ecosystem for identity document scanning hardware, embedding image processing, calibration algorithms, and data capture libraries (OCR, barcode decoding). Port the SDK across multi-device and networked environments (Windows, Linux, embedded systems, tablets), optimize low-latency image pre-processing pipelines, integrate third-party recognition libraries, and collaborate with firmware engineers on device-level communication protocols.…See more Write technical documentation and API references for B2B clients. Requires 3–5+ years of professional C++ and C#/.NET development with hands-on computer vision (OpenCV) experience.

Design, develop, and expand an SDK and Demo App ecosystem for identity document scanning hardware across Windows, Linux, and embedded systems. You'll architect core APIs integrating image processing, OCR, and barcode libraries, optimize low-latency image pipelines, and port solutions to cross-platform networked environments.…See more The role requires 3–5+ years of C++ and C#/.NET development with solid hands-on computer vision experience using OpenCV and hardware interface protocols (USB, Serial, PC/SC).

Lead OutSystems engineer responsible for designing, building, and delivering enterprise low-code applications in a banking environment. Provide technical leadership through code reviews, mentoring developers through OutSystems certifications, and acting as the platform SME for architectural decisions.…See more Manage application deployments via LifeTime and ODC Portal, collaborate with DevOps teams on CI/CD integration, and proactively resolve performance and security issues. Extend OutSystems with full-stack capabilities in .NET/C#, SQL, REST/SOAP integrations, and front-end frameworks while maintaining regulatory compliance.

Design, develop, and maintain a multi-platform SDK and demo application for identity document scanning hardware, with responsibility for core image processing pipelines, OCR/barcode integration, and hardware communication protocols. The role requires expertise in C++, C#/.NET, and embedded systems programming, including low-latency image pre-processing, cross-platform porting to Linux and edge devices, and RESTful/WebSocket network architectures.…See more You will work closely with firmware engineers on hardware interfaces (USB, Serial, PC/SC) and produce technical documentation for global B2B clients.

Lead Windows platform initiatives across System BIOS, UEFI, ACPI, drivers, and applications with responsibility for full software development lifecycle, from prototype to production. Act as technical expert on Windows OS architecture, security, power management, and PC ecosystem trends; independently research requirements and guide cross-functional teams.…See more Deliver hands-on software development, design reviews, and technical excellence while driving innovation and continuous improvement across the platform.

Lead the design and development of an enterprise-grade payment hub and cash management platform for a wealth management client, architecting microservices, API-first, and cloud-native solutions. Drive end-to-end technical design including integrations with banking and fintech systems using middleware like PortX, ThoughtMachine, and API management platforms.…See more Provide technical leadership and mentorship to engineering teams, define architecture standards, and ensure security, scalability, and performance benchmarks across payment and treasury workflows.

Full-time software engineer to design, develop, and test AI-assisted web-based applications that integrate with custom embedded systems. The role requires proficiency in multiple programming languages (Python, JavaScript/TypeScript, Go, C/C++, Rust, C#), Linux systems, web-based UI development, and network software engineering (TLS/HTTPS).…See more Responsibilities include writing requirements and specifications, executing tests, and interfacing with customers on requirements and design reviews. Must be U.S. citizen able to obtain and maintain a DoD security clearance.

Senior Software Engineer role focused on developing and maintaining ServiceNow's server-side JavaScript engine and runtime systems. Responsible for optimizing execution engines, memory management, and performance at the systems level while owning code from design through production delivery.…See more Requires deep expertise in compiler and runtime systems, distributed systems, and backend programming, with opportunities to mentor colleagues and architect scalable, modular solutions for the platform.

Lead the support, maintenance, and enhancement of a cloud-hosted Master Data Management (MDM) application built on .NET technologies. Design, develop, and support REST APIs, reusable services, and enterprise integrations between MDM platforms and systems like Salesforce and ERP.…See more Provide L2/L3 production support, troubleshoot issues, perform root cause analysis, and drive timely resolution. Manage cloud-native solutions on AWS, oversee CI/CD processes, mentor developers, and establish technical best practices across the MDM ecosystem.

Senior Automation Engineer responsible for developing, maintaining, and operating complex custom automation systems in a biotech stem-cell therapy environment. The role requires designing scripted protocols, integrating hardware and software components, troubleshooting system failures, and ensuring compliance with FDA regulations and GxP principles.…See more Requires 5+ years in hardware design, automation, or biotech; proficiency in C#; and hands-on experience with robotics, motion control, sensors, and machine vision systems.

Senior Software Engineer role focused on developing and maintaining ServiceNow's server-side JavaScript engine and runtime systems. Responsibilities include owning code across the full lifecycle from design through production delivery, optimizing execution engines and memory management, and architecting modular systems for scalability.…See more Requires 3+ years of experience with Java or equivalent OO languages, deep knowledge of language internals and backend systems programming, and expertise in data structures, algorithms, design patterns, and performance optimization at scale.

Senior software engineer designing and developing CI/CD systems, enterprise tooling, and quality processes for thousands of developers at Qualcomm. Responsibilities include building front-end applications, backend services, databases, microservices, and middleware APIs; performing code reviews and automated testing; administering Linux environments; and integrating with SCM tools (GitHub, Gerrit, Perforce).…See more Requires 2+ years software engineering experience with a programming language (C, C++, Java, Python) and a bachelor's degree in engineering or computer science; preferred experience includes CI/CD automation, Python/C#/C tool development, and SCM tool workflows.

Entry-level software engineer supporting the development of modeling and data analysis software tools for national security applications. Responsibilities include designing and developing desktop, server backend, and web-based software; analyzing requirements and applying computer science and mathematical principles; and thoroughly testing and documenting software products.…See more Requires a Bachelor's in Computer Science, strong OOP knowledge including design patterns and algorithms, experience with software development and database design, and excellent analytical and communication skills.

Software engineer responsible for the full software development lifecycle in a maritime cybersecurity environment, from requirements gathering through deployment. Design and develop scalable, distributed applications using Java, C#, Python, C++, and serverless architecture while applying cryptography, network security, endpoint security, and computer network defense principles.…See more Write clean, well-documented code; test and debug applications; and collaborate with security specialists, clients, and technical stakeholders to deliver defensive capabilities and situational awareness tools.