Top C# Jobs

Build and optimize low-latency C++ systems for market data processing, exchange connectivity, and order execution. Responsibilities include performance tuning across application, network, and operating-system layers; developing lock-free components; collaborating with traders, FPGA engineers, and infrastructure teams; and owning production systems through design, testing, deployment, and real-time support.

Develop and test high-performance C++ applications for trading platforms. Collaborate with traders and 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 full trading-system development lifecycle, including production support.

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.

Designs, develops, and maintains reliable C# integration applications, including backend services and client-facing components. Translates use cases into functional software, creates reusable code and libraries, integrates SOAP and REST APIs, designs database schemas, and optimizes application performance. Identifies and resolves bugs and bottlenecks, supports code quality and automation, collaborates with business and application teams, and may provide extended-hours support during financial close periods.

Develop and maintain mission-critical web applications and backend services using C#, .NET, ASP.NET, Entity Framework, and SQL Server. Responsibilities include feature development, system integration, testing, deployment, defect resolution, performance tuning, vulnerability remediation, code reviews, and source control with Git/GitLab. The role collaborates with senior developers and architects and requires onsite work at a government facility in Washington, D.C.

Develop and verify cloud-based public safety software, focusing on backend systems, automated testing, API certification, deployment pipelines, databases, and performance troubleshooting. Collaborate across engineering teams to scale mission-critical applications, identify interface issues, improve deployment processes, and deliver sprint commitments. The role requires experience with C#, .NET Core, REST, WebSockets, Angular, Azure, containers, Linux, SQL/NoSQL databases, security remediation, and automated testing across cloud and on-premises environments.

Leads full-stack software engineering for financial technology products, including architecture, design, development, testing, deployment, operations, and maintenance. Builds C#/.NET and Azure-based microservices, REST APIs, SPAs, event-driven systems, and Kubernetes deployments. Provides technical leadership, conducts code reviews, applies security and reliability practices, optimizes SQL performance, and supports CI/CD. Requires strong financial industry knowledge, particularly in CLO, capital markets, or alternative investments.

Develops and implements C++ software solutions under direct supervision. Responsibilities include requirements analysis, software design and coding, troubleshooting with debuggers and testing infrastructure, and resolving routine technical issues in collaborative Agile teams. The role may support modeling and simulation frameworks, large codebases, and CI/CD technologies. Candidates must be able to obtain a Secret clearance and be scheduled to complete a bachelor’s degree by Fall 2026.

Develop and expand cloud-connected IoT lighting controls and building management applications using C#.NET and Angular. Responsibilities include full software development lifecycle participation, web and backend development, requirements definition, architecture, collaboration with cross-functional teams, cloud deployment, technology research, and development of reliable software components and services.

Design, develop, deploy, maintain, and upgrade software for ultrasonic rail inspection products. Responsibilities include architecting a new product line, translating requirements into applications, planning workflows and estimates, and supporting the full software development lifecycle. The role requires collaboration, independent work, multitasking, and development using C#/.NET, SQL Server, Visual Studio, and version-control tools.

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.

The Senior Software Engineer will design, develop, test, and maintain high-performance real-time visualization software for Medtronic’s cardiac mapping and ablation system. Responsibilities include desktop UI development, network and serial device communications, asynchronous integration, performance optimization, fault recovery, automated testing, documentation, and cross-functional collaboration with hardware, QA, and DevOps teams. The engineer will also participate in pre-clinical in-vivo system evaluations and work onsite at least four days per week.

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.

Develop, test, maintain, and support enterprise applications using C#, .NET, ASP.NET Core, Web API, Entity Framework Core, SQL Server, Git, and automated testing. Responsibilities include translating requirements into maintainable code, integrating databases and external services, participating in code reviews, troubleshooting production issues, improving performance, and collaborating with product, architecture, QA, and operations teams in an Agile environment.

Design, build, and operate low-latency C++ services for real-time market-data ingestion, normalization, price indexing, and trading infrastructure. Optimize Linux systems for latency, throughput, memory use, and reliability; develop off-chain and on-chain integrations; improve observability; and own services through deployment and production operations. Collaborate with protocol, trading, and infrastructure teams while maintaining rigorous testing, documentation, and code quality.

Develop and lead embedded C++ software for Navy weapon and combat systems. Responsibilities include designing embedded control systems, extending state-machine architectures, managing the full software lifecycle, debugging in Linux, integrating hardware and software, testing, deployment, and mentoring junior engineers. The role involves cross-functional collaboration, applied research, technical leadership, and occasional travel in support of classified defense programs.