Top C# Jobs

Designs, develops, tests, debugs, and integrates compiler and systems software enhancements. Leads software engineering projects, collaborates with internal and outsourced development teams, resolves complex technical issues, and provides guidance to less-experienced engineers. The role requires hybrid work averaging two days per week in an HPE office.

Design, develop, test, deploy, and maintain high-performance C++ systems, services, libraries, and platforms. Solve complex challenges involving performance, latency, concurrency, scalability, and distributed systems. Collaborate with engineers and investment professionals, build new systems, optimize production platforms, contribute to architecture and developer tooling, and own technology throughout its lifecycle.

Develop and maintain commercial scientific visualization software in modern C++ on Windows. Build desktop features across backend engines and user interfaces, improve performance for large datasets, and expand automation, scripting, APIs, and system extensibility. Collaborate with product managers and engineers on architecture, feasibility, code reviews, technical debt, and cross-codebase initiatives while improving customer workflows and software quality.

Ten-week paid software engineering internship developing, testing, and deploying C++ solutions for a proprietary trading platform. Interns work with large datasets, network programming, multithreaded applications, AI coding tools, and cross-functional technologists and researchers. The role includes mentorship, complex problem-solving, collaboration, and opportunities for full-time employment after graduation.

Develop and support C++ features for Lens Engine and Lens Studio, enabling augmented reality experiences across Snapchat and Specs. Contribute to agentic development tooling, architecture, technical roadmaps, code reviews, and cross-functional engineering efforts. Improve code quality, reliability, performance, testing, maintainability, and developer productivity while integrating AI-assisted workflows and systems.

Design, develop, and support high-performance C++ backend services for a video advertising platform. Responsibilities include system design, concurrency and performance optimization, software releases, cross-functional collaboration, mentoring junior engineers, documentation, reliability monitoring, QA partnership, and technical innovation. The role requires Linux profiling and debugging, distributed service architecture knowledge, and occasional work on machine learning inference systems.

Lead software engineering for JPMorganChase’s eTrading team by designing, developing, testing, debugging, and operationally stabilizing secure, scalable C and C++ applications. Provide technical direction, influence architecture and product decisions, promote software development lifecycle practices, and serve as a subject matter expert. Drive responsible adoption of AI-assisted engineering tools, including code review, testing, troubleshooting, and automation, while ensuring security, correctness, and performance.

Principal Software Engineer responsible for modernizing enterprise developer tooling and improving developer productivity. Designs and codes software solutions, supports C#, Java, Python, Node.js, frameworks, plugins, and extensions, and leads adoption of development technologies. Builds reference architectures, reusable solutions, Inner Source contributions, automation, and AI-assisted development capabilities. Provides technical leadership, solves complex engineering problems, evaluates releases, reduces developer workflow friction, and guides development teams.

Develops and maintains .NET applications using C#, Microsoft SQL Server, unit and integration testing. Responsibilities include building features, fixing bugs, debugging across the application stack, making maintainability and performance decisions, researching solutions, communicating design choices, and collaborating with engineering peers. The role requires approximately 2–3 years of C# and MSSQL experience, Agile development experience, and a bachelor's degree or equivalent practical experience.

Design and build scalable Go or Rust backend services and data pipelines for asset discovery, recognition, and enrichment. Solve distributed-systems challenges involving concurrency, fault tolerance, and high-throughput processing. Integrate AI and ML capabilities, use AI-assisted development tools, contribute to architecture and technical standards, mentor engineers, and participate in code reviews and continuous improvement.

Develop high-performance C++ systems for systematic investing, including real-time data processing, low-latency trading execution, and machine-learning inference tools. Design scalable distributed systems and resilient data pipelines, maintain critical production platforms, and build greenfield solutions in collaboration with quantitative researchers. Ensure software correctness, reliability, performance, and fail-safe operation in live-market environments while aligning technical work with business value.

Leads development of secure, scalable, low-latency C++ software for an eTrading technology team. Provides technical direction, designs and reviews production code, resolves complex engineering problems, and influences application functionality and technical processes. Promotes software development lifecycle best practices and responsible use of AI-assisted engineering tools, including code review, testing, troubleshooting, and automation. Requires strong cloud-native experience, advanced C and C++ skills, and 10+ years of applied software engineering experience.

Design and develop scalable, concurrent C++ software for HPE’s enterprise storage platform in Linux environments. Responsibilities include building storage services and distributed systems features, debugging performance and reliability issues, developing automated tests, participating in architecture and code reviews, integrating technologies, and mentoring engineers.

Design and develop scalable, concurrent C++ software for HPE’s Alletra enterprise storage platform in Linux environments. Responsibilities include building storage services and distributed systems features, debugging performance and reliability issues, developing automated tests, conducting design and code reviews, integrating technologies, and mentoring engineers. The role requires collaboration across engineering teams and expertise in systems architecture, multithreading, operating systems, data structures, and performance optimization.

Develop and test high-performance C++ applications for trading platforms. Collaborate with traders and experienced engineers to translate requirements into efficient solutions, while monitoring, profiling, and troubleshooting systems for reliability and stability. The role provides mentorship and exposure to the complete trading-system development lifecycle, including production support, performance tuning, multithreaded programming, and real-time systems.

Design, develop, test, deploy, maintain, and troubleshoot C#/.NET software applications, including WinForms kiosk solutions, web services, APIs, database integrations, and multithreaded systems. Write SQL, support Kafka and API integrations, manage source control, participate across the SDLC, document technical solutions, and collaborate with engineering teams in an onsite USPS R&D environment.

Develop and maintain C# full-stack software supporting aircraft maintenance detection and reporting for the Navy’s F/A-18 fleet. Responsibilities include building front-end interfaces, backend services, APIs, testing, debugging, and managing large datasets. The engineer will collaborate within an Agile team and travel to Navy sites for software deployment and troubleshooting. Candidates must hold a relevant bachelor’s degree, have 0–3 years of experience, reside near an approved location, be U.S. citizens, and obtain a Secret clearance.

Develop and optimize large-scale GPU supercomputing infrastructure for AI training and inference. Build low-level CUDA kernels using CUTLASS, Tensor Cores, and Nsight; profile and resolve performance bottlenecks across GPU memory, networking, filesystems, and multi-GPU systems; and collaborate with AI researchers to deliver scalable, production-grade compute performance.

Remote C development internship focused on reviewing and validating systems-code patches, handling backports, researching CVEs, fixing security issues, building RPM and DEB packages, and supporting code reviews. The role requires Linux, C, Git, shell scripting, algorithms, data structures, and critical use of AI coding assistants. RPM/DEB packaging, CVE research, GDB, and strace experience are preferred.

Deploys, integrates, hardens, and operates modular C-UAS data and software platforms in secure DoD environments. Builds data pipelines across classification boundaries and disconnected conditions, integrates mission systems, manages Kubernetes-based infrastructure, supports accreditation, and handles observability, incident response, upgrades, and backup recovery. The role also documents solutions, trains mission teams, represents field needs to engineering, and mentors junior forward-deployed data engineers. Most work is remote with occasional travel to restricted environments and SCIFs.

Develop software for semiconductor automation systems by gathering requirements, designing solutions, implementing C# and Python code, reviewing code, creating tests, integrating components, debugging system issues, documenting releases, and supporting customer adoption. The role follows formal software and product development processes and requires collaboration with project teams and peer engineers.

Develop, test, debug, enhance, and maintain software applications using .NET, C#, SQL, JavaScript, and HTML. Integrate designs and specifications, resolve hardware and software interface issues, research emerging technologies, create technical documentation, troubleshoot application problems, support customers, and report on project progress. The role requires an active Top Secret clearance with SCI eligibility and is performed onsite in Washington, DC.

Design and develop the onboard platform for Level 4 autonomous vehicles. Responsibilities include runtime architecture, process communication, fault detection, real-time performance optimization, cross-layer debugging, safety degradation, measurement systems, and deployment across vehicle and compute platforms. The role collaborates across autonomy, hardware, controls, and safety teams to improve fleet reliability and enable driverless operation.

Designs, builds, and owns production-grade full-stack services and UI features for Finastra’s Azure-hosted lending platform. Responsibilities include developing C#/.NET and Angular applications, REST APIs, background services, event-driven integrations, secure and testable code, and CI/CD pipelines. The role contributes to architecture, technical documentation, code reviews, and system operational readiness while mentoring engineers. Daily use of GitHub Copilot and AI agents is expected, with strong judgment applied to all generated output.

Develop and maintain C# and .NET software using object-oriented design, testing, CI/CD, automation, and modern engineering practices. Analyze requirements, troubleshoot complex applications, participate in Scrum ceremonies, conduct code reviews, document technical solutions, and contribute to distributed systems, REST services, microservices, containerization, and AI-enabled projects. Provide technical guidance, collaborate across teams, and continuously improve development processes.