Top C# Jobs

Design and implement complex low latency, high throughput software for financial data distribution, conduct testing, and improve software reliability.

Build and maintain cloud-native liquidity management platform features using Azure and .NET. Implement CI/CD, observability, and rigorous testing. Mentor engineers, drive technical design, participate in on-call rotation, and improve team practices to deliver scalable, resilient treasury solutions.

Develop and maintain the Java client library and high-performance C/C++ server applications. Implement message parsers and feed handlers, optimize for extreme throughput and low latency, build tools for petabyte-scale processing, collaborate on build/deploy/CI practices, monitor uptime, and support smooth feature rollouts.

Implement and maintain the C# client library and high-performance C++ server applications. Build message parsers and feed handlers, optimize for millions of messages/second and nanosecond latency, develop petabyte-scale data tools, collaborate on build/deploy/CI/CD, monitoring, and ensure reliable feature rollouts.

Design and implement large-scale distributed systems for a supercomputing cluster, optimize low-level performance across GPUs, kernel, networking, and filesystems, collaborate on hardware-software co-design, maintain scalable reliable codebase, and build productivity tools.

Design and implement high-performance 2D/3D GIS visualization software and real-time rendering features. Research and apply advanced graphics algorithms, diagnose and fix bugs and performance issues, handle large data visualization and I/O caching, and collaborate with cross-functional teams to deliver quality software in an agile environment.

Build, integrate, and stress-test full-stack applications and backend services that leverage advanced AI models. Develop production APIs, front-end features, databases, and cloud infrastructure; troubleshoot integrations; prototype rapidly and deliver high-quality code and documentation in fast-moving environments.

Develop and integrate C/C++ software for Naval projects (including SLBM systems) using Agile practices. Work on software development, analysis, problem solving, and team collaboration to meet schedule-driven goals. Support senior developers, interact with customers and engineers, and comply with security and site access requirements.

The Senior Software Engineer will design, develop, and maintain software applications, lead coding efforts, mentor junior staff, and collaborate with cross-functional teams to align solutions with business goals.

Develop, evaluate, and test safety-critical Orion GN&C flight software. Use MATLAB/Simulink/Stateflow/Autocode, Python, and C/C++ for analysis, simulation, integration, and build management. Improve software processes, perform deep-dive flight and simulation analyses, and collaborate with NASA and contractor teams.

Design, implement, and maintain low-latency C++ applications for trading strategy execution, optimizing performance, and collaborating with traders and engineers.

Develop, enhance, and maintain backend web applications and services using C#/.NET. Implement features with ASP.NET, Entity Framework, and SQL Server; write unit and integration tests; perform troubleshooting, code reviews, vulnerability remediation, and O&M tasks while collaborating with senior engineers and cross-functional teams.

Design, develop, test, deploy, and maintain enterprise applications and APIs. Analyze system flows, automate processes with scripting, create tests and architecture/data-flow diagrams, and work in an Agile team using DevSecOps and container orchestration to meet stakeholder requirements and tight deadlines.

The Lead Software Engineer will design and implement secure APIs, develop complex web front-ends, and mentor junior engineers while ensuring high-quality software development and customer satisfaction.

The Software Engineer II will design, develop, and maintain secure software solutions, focusing on smart card personalization products and HSM firmware development, while ensuring alignment with security standards.

The role involves developing and maintaining trading user interfaces, enhancing performance of C# components, and adapting to project changes while collaborating with teams.

Design, develop, and test high-fidelity real-time simulation software for SpaceX flight systems. Build core simulation infrastructure and models (fluids, electronics, multi-body physics), prototype designs, improve performance and reliability, and collaborate with engineering teams and users to add features and improve usability.

As a Software Engineer for Starlink, you'll develop reliable real-time software for satellite-based internet, participate in design reviews, and manage software testing.

Design, develop, and test high-fidelity, real-time simulation software for SpaceX flight systems. Build core simulation infrastructure and physics, fluids, and electronics models. Improve performance, reliability, and user features; prototype concepts; collaborate across engineering groups to support Falcon, Dragon, Starlink, and Starship missions.

Design, develop, optimize and maintain high-performance C++ fintech applications and distributed microservices. Build low-latency, secure services integrating via gRPC and REST, tune Oracle databases, deploy on RHEL and container platforms, automate CI/CD, troubleshoot production incidents, and mentor junior engineers while collaborating with cross-functional teams.

Develop and maintain C/C++ software for Naval weapon systems (SLBM), following Agile and DevSecOps practices. Collaborate on architecture, requirements, testing, and integration; use Git, Jira, and static analysis tools. Support cross-functional teams, perform problem solving, and sustain professional development while meeting program schedules.

Design, develop, and implement C++ software solutions within Agile teams. Solve and troubleshoot software issues, support requirements analysis and project tasks, use debuggers and testing infrastructure, and collaborate on complex codebases under direct supervision. Maintain solution architecture and provide expertise support.

C# developer for fixed income/commodities front-office technology. Full SDLC with support responsibilities; build and maintain trading systems, databases, and UIs using .NET, DevExpress, messaging middleware, SQL Server/Sybase. Requires strong debugging/triage and communication skills. Unit testing and meta-programming, OpenLink/ETRM, and trading product knowledge are desired.

Lead C#/.NET Developer to design and implement healthcare-focused software and integrations. Responsibilities include C#/.NET development, SOAP/REST services, PowerShell automation, HL7/CCD/CCR healthcare interchange, ETL/MDM using Informatica, Oracle/PLSQL work, merging very large datasets, and specifying/conducting system and user acceptance testing.

Develop, design, test, and maintain C# applications on a collaborative Scrum team. Work on new system development and enhancements, participate in implementations, and produce/update documentation. Full-stack skills and teamwork required; JavaScript experience preferred.