Top C# Jobs in Phoenix, AZ

Lead design, development, testing, and delivery of Thunderbolt platform embedded software. Collaborate with cross-functional teams, drive engineering best practices, support DO-178C Level A certification, and mentor engineers to deliver high-quality RTOS-based avionics solutions.

Design, develop, and integrate embedded avionics software for the Anthem Integrated Flight Deck. Support IMA systems integration, validation & verification, KPI tracking, requirements analysis, model-based development, integration testing, troubleshooting, and lab/on-aircraft testing to ensure performance and certification readiness.

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.

As a Backend Engineer, you'll improve Git and Gitaly by contributing features, bug fixes, and performance improvements, collaborating with the open source community, and participating in architectural discussions.

Develop C# desktop applications (WinForms) and MS Excel plugins, write scripts, collaborate with technical customers, follow Agile processes, implement functional modules, code to requirements, and track/resolve software defects.

Perform EMI/C engineering from component to system level: develop models and test apparatus, execute EMI/EMC and RF testing, analyze data, produce qualification procedures/reports, and support mitigation, troubleshooting, and design reviews. Occasional travel and classified program access required.

Lead EMI/C engineering activities from component to system level: define and tailor test requirements, model interference and shielding, perform emissions/immunity testing, design test apparatus, analyze results, generate procedures/reports, and support mitigation/troubleshooting. Occasional travel and off-shift work may be required.

Lead EMI/C systems engineering from component through system level: develop EMI/EMC test plans, perform and analyze emissions and susceptibility testing, design mitigation and test apparatus, generate qualification procedures/reports, and support troubleshooting, design reviews, and occasional travel for testing.

Develop customer-directed desktop applications using C# and C++, focusing on WinForms and Excel plugin development. Work in Agile teams to gather requirements, plan modules, write code, script automation, coordinate with other developers, and track/resolve defects. Exposure to EDA tools (Cadence Allegro, Mentor Graphics Expedition) is a plus. Position is a short-term (3 month) contract starting ASAP.

Design, build, test, and maintain full-stack web applications using .NET/C# and SQL. Optimize T-SQL, create technical documentation, write user stories, conduct unit testing, estimate work, and collaborate with users and teams for enhancements and issue resolution.

Develop and maintain .NET Core trading systems for Linux with service-oriented architecture and multi-threaded processing. Implement async, lock-free structures and distributed systems, write unit and integration tests, optimize SQL queries, design data structures and algorithms, and work with communication protocols (SignalR, gRPC, HTTP). Use PostgreSQL, Docker, and AWS in the deployment stack.

Contribute to and optimize the performance of ClickHouse, assist with debugging, collaborate with teams, and engage with the open-source community.

Design, implement, test, and maintain Windows software components using C, C++, and C#. Collaborate across QA, UX, product, and DevOps to evolve product architecture, support full-stack components (database, server, web), use source control and CI/CD, participate in Agile ceremonies, and apply generative AI tools throughout the development lifecycle.

Develop and optimize ultra-low-latency, high-performance trading infrastructure in modern C++. Implement and tune order execution, market data connectivity, multi-threaded systems, and risk modules. Profile and benchmark real-time systems, collaborate with quants and traders, and maintain robust, fault-tolerant continuous trading operations.

The Back End Software Engineer will design and build scalable services for a SaaS platform, collaborate with teams, and contribute to quality code and architecture discussions.

Lead design and delivery of complex backend features for a high-scale online banking platform. Own code from design to production, modernize legacy systems, develop microservices, design APIs, implement tests, ensure secure coding, use AI-assisted tools, troubleshoot issues, and document APIs while collaborating with product, QA, and front-end teams.

The role involves developing and maintaining C# and SQL code for healthcare EDI processes, focusing on client implementations and claims payment systems.

Design high-performance C++ libraries for automated PCB design challenges, mentoring peers and shaping technical direction while collaborating with experts in various fields.

Design and evaluate performance engineering tasks for AI training/evaluation. Optimize runtime, compilers, memory, CPU/GPU and concurrency. Produce documented solutions, evaluate AI-generated code, and build evaluation frameworks and scoring rubrics while collaborating with researchers and SMEs.

The C# / .NET Developer will design and maintain middleware applications, build Shopify integrations, and support a mobile app backend in a remote work environment.

Build and maintain scalable, cloud-native APIs using .NET. Enhance core platform components, lead architecture and testing discussions, optimize telemetry and performance, collaborate cross-functionally, conduct code reviews, and mentor team members.

You will develop and maintain components of the LLVM based toolchain, collaborating with the community while ensuring platform-specific optimizations and tests.

Develop user interface components for ArcGIS Pro using C# and WPF, work in an agile team, and design software solutions for raster and imagery processing.

PrivateID seeks a Principal C++ Engineer with at least 10 years of experience to lead complex systems and scale their platform in a remote-first environment.

Designs and develops complex applications, authors technical specs, mentors junior developers, implements UI and backend code, unit tests and debugs, ensures quality/security/compliance, and produces technical documentation.