Top Remote C# Jobs

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.

Software Engineers at Citadel develop, maintain, and support high-performance trading platforms, focusing on custom software solutions and system stability.

Lead development of core client systems and engine-level infrastructure in Unity/C#. Diagnose and fix cross-cutting performance issues, upgrade third-party SDKs, evolve build tooling, produce design docs, scope multi-week infrastructure initiatives, mentor engineers, and drive profiling, optimization, and architecture changes to enable future features.

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

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.

Build and optimize high-performance C/C++ and Rust server applications and feed handlers for market data. Implement parsers, petabyte-scale processing tools, and low-latency, high-throughput optimizations. Collaborate on build/deploy/CI, monitoring, and ensure reliable feature rollouts.

Develop end-to-end low-level software features using C++ or C within Chromium and large-scale, real-time, cross-platform systems. Research enterprise security and productivity solutions, collaborate with product, web, security, and field engineering teams, and address customer challenges. The role requires expertise in systems internals, low-level design, and development across Windows, macOS, and Linux. Preferred experience includes network protocols, web security concepts, sandboxing, certificate handling, and Chromium or browser extension development.

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.

Seeking a Senior Software Engineer to design and implement multimedia data systems using C# and .NET Core. Responsibilities involve developing high-performance applications, collaborating with teams, and driving engineering excellence in an Agile environment.

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.

Develop software and enhance systems in C++ on Linux, while collaborating with analysts and engineers to create data processing tools.

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.

As a Displays Software Engineer, you'll design and build real-time user interface applications for automated aircraft systems, ensuring safety and usability across platforms.

As a Senior Full-Stack C#/.NET Engineer, you will fork and set up existing applications, implement architectural adjustments, and ensure deployment in Azure. The role requires close collaboration with stakeholders and troubleshooting legacy code.

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

As a Software Engineer, you will develop and maintain the Tally software stack, enhance robot navigation and autonomy, and support CI/CD processes.

Own and build features in a custom Flutter engine and Dart runtime fork using C++. Design, implement, ship, and support systems-level features (asset support, hot restart, crash reporting, profiling) while maintaining build infra and coordinating rebases and native tooling. Work remotely on a small team with high ownership and customer impact.

Lead re-architecture and modernization of a legacy C++ execution kernel, improve performance, memory and concurrency behavior, diagnose production issues, and provide technical leadership across design, code review, and cross-functional collaboration.

Evaluate AI coding-agent interactions for usefulness, correctness, engineering judgment, reasoning quality, and overall developer experience. Provide rigorous, opinionated feedback, distinguish response-quality levels, and help define standards for excellent interactions with tools such as OpenAI Codex, Claude Code, and Cursor. The role requires deep software engineering experience, familiarity with AI-assisted development workflows, and the ability to assess code and explanations without reviewing every line.

Build and enhance an exam development platform using Angular front-end and C# backend. Collaborate with product and design teams, ensure performance and responsive UX, follow CI/CD and automated testing best practices, perform code reviews, troubleshoot issues, mentor junior developers, and incorporate improvements including AI/ML retrieval-based solutions.

Build and test scalable SaaS features using ReactJS and C# .NET. Develop single-page applications, design REST API endpoints, create asynchronous backend services, and contribute throughout the SDLC. Collaborate with developers, product analysts, and UI/UX designers in an agile environment. Deliver code within sprint cycles, help define feature scope, solve complex problems, and support the transition from on-premise products to cloud-based architecture.

Develop and deliver new features for a SaaS document management platform. Build React single-page frontends, design and consume REST APIs, implement C# .NET backend services, participate in SDLC and two-week sprints, collaborate with product, QA, and designers, and contribute to cloud and mobile work when applicable.

Provide advanced customer-facing technical support for enterprise VDI solutions: diagnose and reproduce complex issues, perform root-cause analysis, collaborate with engineering/product/QA, document findings, drive product and supportability improvements, and participate in on-call rotations.

Remote backend C# developer to build and optimize a high-load spot-exchange matching engine. Improve performance and API throughput, implement business features, write unit and integration tests, work with .NET Core and PostgreSQL on AWS, and apply multithreading, async, and distributed systems concepts.

Join a talent community for C++ engineers to get priority access to future roles. Ideal candidates have strong modern C++ (C++11+) skills, experience in graphics/geometry or audio/image/video processing, performance optimization or cross-platform development, and familiarity with tools like Qt and CMake. Remote collaboration, strong problem-solving, and good communication are required; bonus for C++ integration with Python, JavaScript, Swift, Objective-C, AI, web, or mobile.