solid-principles jobs in San Diego

Senior Software Engineer responsible for developing and maintaining C++ software for instrument communication and GUI applications at a quantum technology startup. You will design reliable software components that interact with hardware devices, implement Qt-based graphical interfaces, write unit tests using Google Test, and manage build configurations with CMake.…See more This is a hands-on role requiring 5+ years of C++ experience, modern C++ proficiency (C++14/17/20), Qt 6 expertise, and familiarity with instrument communication protocols (SCPI, FTDI USB, Ethernet, Serial).

Design, develop, and optimize modem firmware and software for 5G-Advanced and early 6G protocol stacks on Qualcomm's Snapdragon chipset. Work across L1/L2/L3 protocol layers to implement 3GPP-compliant features, develop real-time scheduling and resource management algorithms, and use custom scripting to dynamically reconfigure modems based on network conditions and AI-driven signals.…See more Requires strong C/C++ embedded systems expertise, real-time OS experience (RTOS), wireless communication principles, and the ability to debug complex field issues and optimize performance in latency-critical environments.

Design, develop, and optimize modem firmware and real-time embedded software for 5G/6G protocol stacks (L1/L2/L3) on Qualcomm's Snapdragon chipset, implementing 3GPP-compliant features and real-time scheduling algorithms. Work across protocol layers to develop adaptive algorithms that respond to network conditions and AI-driven optimization signals, and architect frameworks enabling OEM and operator partners to deliver differentiated wireless experiences.…See more Debug complex field issues using protocol logs and trace tools, write and maintain unit and integration tests, and collaborate with systems, architecture, and hardware teams on modem bring-up and performance optimization. Requires strong C/C++ foundation, deep wireless communication principles knowledge, embedded systems expertise, and familiarity with real-time operating systems.

Develop FPGA-based solutions using hybrid C/C++ and HDL architectures, designing component interfaces to analog/digital converters and microcontrollers. Build robust data acquisition and analysis systems for health monitoring, perform integration and verification testing, and collaborate across firmware, hardware, and software teams.…See more Requires 2+ years of FPGA/embedded development experience, proficiency in C/C++, Xilinx Vivado/Vitis, and device communication protocols (SPI, I2C, Ethernet, Serial). This role requires access to export-controlled information and U.S. person status.

Principal Software Engineer leading architecture and development of fleet management, robotics data management, and manufacturing execution systems (MES) in C++ and Python. You will design software for station monitoring, configuration management, telemetry, logging, and specs/results tracking while setting technical direction for how the automation stack integrates with higher-level management systems.…See more The role requires mentoring engineers, driving architectural decisions on system interfaces and data flow, and maintaining rigorous code quality and engineering practices across a cross-functional team.

Senior Principal Software Engineer leading the Robotic Automation team at Monarch Quantum, responsible for architecting and maintaining complex distributed software systems that manage robotic hardware and manufacturing execution. Requires 10+ years of software engineering experience with 8+ years of professional C++ development and strong Python expertise, including experience designing fleet management, data management, or manufacturing systems.…See more The role combines hands-on coding and code/design review leadership with strategic planning, mentorship, and technical risk mitigation across C++ and Python codebases. Requires U.S. person status due to export-controlled information access.

Design, develop, and optimize modem firmware and software for 5G-Advanced and early 6G protocol stacks, working across L1/L2/L3 layers to implement 3GPP-compliant features. Develop real-time embedded software on proprietary RTOS (QuRT) with strict latency and throughput constraints, and architect frameworks for resource management and AI-driven optimization.…See more Collaborate with systems, architecture, and hardware teams on modem integration, performance optimization, and field issue resolution using protocol logs and debugging tools.

Design, develop, and optimize modem firmware and software for LTE, 5G-Advanced, and early 6G protocol stacks, implementing 3GPP-compliant features and real-time scheduling algorithms. Develop embedded software on proprietary RTOS (QuRT) with strict latency and throughput constraints, collaborate on modem bring-up and performance optimization, and resolve complex field issues using protocol logs and debugging tools.…See more The role requires strong C/C++ design skills, deep understanding of wireless communication principles (OFDM, MIMO, channel coding), real-time embedded systems expertise, and familiarity with AI/ML optimization techniques for adaptive modem behavior.

Develop FPGA-based solutions using hybrid C/C++ microprocessor and HDL fabric architectures, designing robust component interfaces to ADCs, DACs, and microcontrollers. Design and develop complex data acquisition and analysis systems for system health monitoring, perform integration and verification testing of integrated hardware and firmware platforms, and collaborate with cross-functional teams.…See more Requires 2+ years of FPGA/embedded development experience, proficiency in C/C++, Xilinx Vivado/Vitis, digital logic, computer architecture, and device-level communication protocols (SPI, I2C, Ethernet, Serial).

Senior iOS Engineer responsible for actively shipping production code for Speechify's iOS app (#18 productivity app in App Store). You'll lead engineering and product decisions, maintain complex app architecture, and participate in product discussions to shape the roadmap.…See more Required skills include Swift, SwiftUI, multithreading, CI/CD, Fastlane, SOLID principles, and Git; you should have a track record scaling products to large user bases and strong product thinking.

Senior Software Engineer building C++ desktop and embedded software at a quantum computing startup. You'll develop instrument communication applications using Qt for GUI, design hardware-interactive components, write unit tests with Google Test, and manage builds with CMake.…See more The role requires 5+ years of C++ experience, expertise in Qt 6, multi-threaded programming, and familiarity with instrument protocols (SCPI, FTDI, Ethernet, Serial); you'll work in an agile environment, collaborating with firmware and hardware teams while maintaining documentation and engineering best practices.

Junior to mid-level .NET developer role building enterprise web applications with C# and ASP.NET Core in Fremont, California (onsite). Responsibilities include developing and maintaining REST APIs, building responsive Angular UIs, designing microservices, optimizing SQL queries, and integrating caching (Redis) and event-driven messaging (Kafka).…See more Requires 3–5 years of .NET experience with enterprise applications and distributed systems.