Top Senior C# Jobs

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.

Designs, customizes, updates, and releases software applications using C++ in a Linux environment. Collaborates with stakeholders, QA, and cross-functional teams to deliver reliable solutions; analyzes performance metrics, manages technical documentation, mentors junior engineers, and participates in peer programming, design, and prototyping sessions. Requires independent judgment and may involve nights, weekends, and variable schedules.

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.

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.

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 operate core networking software for a massive AI datacenter fabric. Responsibilities include routing and traffic-engineering algorithms, reliable real-time switch software, architecture and code reviews, prototyping, full-cluster experimentation, development tools, deployment systems, data analysis, testing, monitoring, and continuous software releases. The role focuses on distributed systems, high-performance networking, and low-latency infrastructure at large scale.

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.

Lead the design, development, testing, debugging, and maintenance of high-performance C++ software for Linux-based machine-control and commissioning systems. Own complex technical problems, contribute to architecture, lead design reviews, mentor engineers, and improve software quality and reliability. Collaborate with product, architecture, QA, and distributed engineering teams to deliver embedded and real-time solutions for earthmoving automation.

Designs and maintains high-performance C++ software and Windows user-mode components. Responsibilities include DLL injection, API hooking, Windows security protocol integration, crash dump analysis, BSOD investigation, and troubleshooting complex system issues involving memory, synchronization, RPC, DCOM, authentication, and directory services.

Develops, integrates, tests, and debugs C/C++ software for real-time embedded systems and hardware-in-the-loop environments. Responsibilities include algorithm integration, hardware/software integration, low-level development, documentation, software lifecycle activities, and supporting laboratory integration. The role requires Linux and real-time systems expertise, active DoD Secret clearance, U.S. citizenship, and on-site work in Dallas laboratories.

Develop and modernize large C/C++ software systems on Linux, focusing on modular builds, legacy code assessment, CI/CD pipeline improvements, automated testing, and resolving technical debt. Collaborate with cross-functional stakeholders to ensure software quality, evaluate architecture and tradeoffs, and integrate shared CI/CD capabilities. The role also involves designing software, debugging, documentation, and applying engineering standards throughout the development lifecycle.

Build and support complex features across C#/.NET back-end services and React front ends. Responsibilities include technical design, API and data modeling, secure and tested coding, production troubleshooting, code reviews, mentoring, documentation, and improving engineering practices. Collaborate with Product, QA, DevOps, Technical Leads, and architecture teams while balancing delivery, maintainability, performance, accessibility, observability, and security.

Design, develop, and maintain cloud-based software using .NET and C#. Collaborate with international teams throughout the software development lifecycle, including architecture, coding, testing, deployment, feature development, and bug fixes. Apply clean-code principles and pragmatic design practices. Support containerized deployments with Docker and Kubernetes, and coordinate effectively across multisite development teams.

Design and implement high-performance middleware, runtime services, tooling, and foundational software for Shield AI’s EdgeOS and Hivemind autonomy systems. Develop across Linux, real-time operating systems, and resource-constrained embedded platforms. Contribute to interface definition languages, debugging and observability tools, automated testing, documentation, architecture, code reviews, technical guidance, and mentorship while collaborating with autonomy, systems, simulation, and test engineering teams.

Design and optimize high-performance C++/CUDA libraries for GPU-based data processing. Improve multi-node GPU communication (UcxExchange), optimize Presto GPU query performance, and lead enhancements across Presto, Velox, and cuDF projects for efficient DataFrame and database acceleration.

Design, develop, support, and optimize LensCore, Snap’s C++ AR engine for Specs, Snapchat Lenses, and Lens Studio. Collaborate with teams to deliver features to Lens creators, participate in planning, and create technical specifications. The role requires strong C++ development, rendering or 3D engine experience, AI-assisted development, and familiarity with scripting, Linux, and command-line tools.

Develop and maintain C#/.NET applications using Angular and SQL Server. Responsibilities include designing solutions, writing clean code, debugging, resolving technical issues, supporting stakeholders, contributing to planning and agile project teams, and reporting project status. The role requires experience with large menu-driven business systems, data-intensive transactions, screens, and reports. Candidates must work onsite in Richmond, Virginia as needed, with limited remote work after the first month.

Design, build, and maintain high-throughput, low-latency C++ systems for symbol resolution. Develop scalable APIs, participate in design/code reviews, monitor and troubleshoot production, champion best practices, and mentor teammates.

Design, develop, and support high-performance equities OMS and electronic trading systems. Build low-latency C++ solutions, FIX connectivity, market data integrations, exchange interfaces, routing, execution, and risk controls. Collaborate with traders, product, operations, and risk teams; lead architecture and code reviews; optimize reliability and performance; and resolve production issues. The role also involves mentoring developers and advancing AI-assisted engineering practices.

Develop and maintain resilient banking applications using C# and .NET within SDLC standards. Responsibilities include requirements analysis, application design, coding, pull request and code reviews, source control, deployment, Azure modernization, data migration, stakeholder collaboration, and technical documentation. The role supports application stability, risk controls, audits, and regulatory requirements, while participating in Agile teams and an on-call rotation.