Top Senior C# Jobs

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.

Senior C#/.NET developer role to design and implement enterprise-level, scalable microservices using AWS. Work with MS SQL/PostgreSQL and React.js, mentor developers, overlap multiple time zones, and grow into technical leadership in a fully remote environment.

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.

The Senior C# Developer will lead AI enablement by transforming APIs into an Agent Mesh using C# and the MCP, ensuring secure AI interactions through Gravitee management.

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.

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.

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.

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.

Design, develop, test, and maintain enterprise C#/.NET applications and RESTful APIs. Optimize SQL Server and PostgreSQL databases, troubleshoot production issues, perform code reviews, mentor developers, and collaborate with QA/DevOps on CI/CD, containerization, and deployments within an Agile team.

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.

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.

Design, architect, and build payment and transaction processing applications using C#/.NET. Lead cross-functional meetings, produce high-quality optimized code, implement web services, and collaborate with teams to deliver scalable, maintainable solutions.

As a Senior Software Engineer, lead the development of real-time machine control systems for 3D metal printing platforms, influencing system performance and reliability. Mentor engineers, define software standards, and drive initiatives for system robustness and scalability.

Design and implement real-time machine control software for 3D metal printing systems while collaborating with multidisciplinary engineering teams to enhance system reliability and performance.

Design, implement, test, and operate SaaS features using C#/.NET across backend and frontend teams. Debug complex systems, automate testing and CI/CD, apply DevOps ownership, and incorporate AI-assisted SDLC practices to deliver secure, high-quality customer solutions.

Develop high-performance client-side systems in C++/WebAssembly, optimize multiplayer protocols, and collaborate on impactful features for Figma's design platform.

Develop, verify, and deploy mission-critical flight software/configurations for Dragon crewed and cargo vehicles. Build tools for automated deployment and verification, analyze test results and bugs, troubleshoot flight hardware/software with interdisciplinary teams, plan and execute vehicle testing, support mission operations as flight software specialist, and roll out software changes to the vehicle fleet. Occasional travel required.

Develop scalable and efficient geocoding algorithms and APIs while optimizing C++ code for performance and memory consumption. Collaborate with engineers on geocoding solutions.

Develop and maintain C++ machine control and data analysis software for advanced mask inspection systems. Collaborate with multidisciplinary teams to define system requirements, optimize performance, support integration and testing, and resolve customer escalations. Work in Linux environments and leverage RPC/REST APIs, containerization, and modern UI frameworks as needed.

Develop C++ software components for a 3D geospatial mapping platform. Collaborate on architecture, design, and implement algorithms and systems for data optimization and rendering.

Lead the design and development of core software infrastructure for 4D LiDAR products, optimizing for performance, scalability, and reliability while mentoring teams.