Top Senior C# Jobs in Phoenix, AZ

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.

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.

Leads the architecture, design, integration, verification, and technical oversight of spacecraft Command and Data Handling electrical systems. Responsibilities include flight computers, data buses, telemetry, command systems, harnesses, requirements, interface documentation, design reviews, risk mitigation, manufacturing coordination, cost and schedule development, and hardware/software integration. The role provides technical leadership across avionics, software, GNC, and mission operations while mentoring engineers and supporting program execution.

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.

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.

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.

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.

As a Sr. Software Engineer at Bloomerang, you will lead technical direction, mentor engineers, and enhance SaaS solutions while utilizing .NET and AI tools. You will ensure scalable, maintainable applications, advocate for Agile workflows, and focus on quality outcomes in software development.

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.

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.

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.

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