Top C# Jobs

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.

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, 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 cross-platform C++ and Qt software for network device discovery, monitoring, and data collection across Windows and Linux. Build high-performance, concurrent, asynchronous systems that communicate with thousands of devices using SNMP, SSH, ICMP, WMI, and related protocols. Own testing, troubleshoot issues across application, operating-system, and network layers, optimize reliability and performance, and collaborate with backend, UI, QA, and product teams.

Develop and optimize LensCore, Snap’s augmented reality engine for Specs, Snapchat Lenses, and Lens Studio. Responsibilities include designing C++ features, improving engine performance, collaborating with cross-functional teams to deliver creator-facing capabilities, and contributing to technical planning and specifications. The role requires rendering, 3D engine, computer vision, sensor, or machine learning experience, with preferred experience in modern C++, developer APIs, Qt, and relevant graphics libraries.

Design, develop, test, deploy, and support features for a distributed, event-driven avionics SaaS platform using C#, Azure, microservices, containers, and DevOps practices. Responsibilities include implementing automated unit, functional, contract, and canary tests; diagnosing production issues; and participating in occasional off-shift support. The role requires collaboration within an agile software engineering team and is based in Phoenix, Arizona, on a hybrid schedule.

Designs, builds, and optimizes highly scalable C++ backend and advertising delivery systems. Responsibilities include AWS infrastructure, Kubernetes-based container orchestration, distributed systems, performance optimization, security, software releases, troubleshooting, documentation, and technical leadership. The role collaborates with global engineering and product teams, supports mission-critical applications, evaluates new technologies, and mentors junior engineers.

Leads software engineering efforts within an agile team, designing, developing, testing, debugging, and operating secure, scalable applications. Builds full-stack solutions using C#/.NET, Java, React, Angular, APIs, relational and NoSQL databases, CI/CD, and cloud technologies. Guides architecture evaluations, automation, operational stability, software quality, and adoption of approved AI-assisted development tools. Coaches engineers on responsible AI use, secure coding, testing, and validation practices while contributing to technical communities and team culture.

Develop and maintain PLM and digital engineering applications using C# and .NET. Lead software design, requirements gathering, SDLC planning, coding, testing, code reviews, and technical problem-solving. Collaborate with engineers, business analysts, architects, administrators, and business representatives to deliver application solutions. Improve development quality through automated testing, peer reviews, and development standards while mentoring and guiding team members.

Develop scalable C++ software that defines and enforces endpoint behavior across millions of managed Windows endpoints. Responsibilities include implementing features, improving platform performance, shipping production code, designing new systems, writing architecture documents, defining subsystem contracts, and collaborating with server, UI, product, and design teams. The role requires deep Windows systems and kernel-driver expertise, with preferred experience in WHQL, minifilter or WFP drivers, macOS Endpoint Security, and Linux kernel development.

Leads complex software optimization initiatives from design through implementation and validation. Builds cloud-native services, data pipelines, dashboards, automation, and AI-enabled forecasting solutions. Analyzes cloud costs, resource utilization, reliability, capacity, and engineering productivity while partnering with Engineering, Finance, Product, Data, Platform, and SRE teams. Ensures scalable and secure integrations, testing, observability, financial data quality, and measurable savings. Provides technical leadership and mentorship to junior engineers without direct people-management responsibilities.

Design, develop, optimize, deploy, and maintain high-performance market data and automated trading systems. Process raw market data feeds, implement CME and Cboe exchange protocols, and optimize concurrency, throughput, scalability, and ultra-low-latency performance. Collaborate with traders, quantitative researchers, analysts, and engineers while supporting critical applications, automated testing, peer reviews, and best practices. Coach junior engineers and take ownership of projects from design through maintenance.

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.

Develops, tests, troubleshoots, and maintains secure, stable, and scalable software components in a Linux C/C++ environment. Responsibilities include system design, application development, technical problem-solving, SDLC execution, automation, CI/CD, resiliency, security, and responsible use of AI-assisted development tools. The engineer collaborates within an agile team and analyzes data to support reliable application development.

Develop and test high-performance C++ applications for trading platforms. Collaborate with traders and senior engineers to translate requirements into efficient solutions, while monitoring, profiling, troubleshooting, and improving system reliability. Gain hands-on experience across the full trading-system development lifecycle in an on-site, highly collaborative environment.

Design, develop, and maintain high-performance C++ trading platform applications. Partner with traders and quantitative researchers to translate business needs into efficient technical solutions. Lead profiling, performance optimization, testing, code review, and release improvements while owning features from design through production support.

Build and optimize low-latency C++ systems for market data processing, exchange connectivity, and order execution. Analyze performance across application, memory, CPU, networking, and operating-system layers. Collaborate with traders, FPGA engineers, and infrastructure teams, while owning production systems through design, testing, deployment, and real-time support.

Architect and develop Packet Forwarding Features for PTX Series Routers, engage with customers, work with test teams, and sustain existing features.

As a Sr. Software Engineer at Bloomerang, you will lead technical direction, mentor engineers, and enhance SaaS solutions while utilizing .NET and AI tools. You will ensure scalable, maintainable applications, advocate for Agile workflows, and focus on quality outcomes in software development.

Develop and maintain scalable build, regression, and release infrastructure for chip designers. Build user-facing services for scheduling, tracking, and triaging workflows, along with tools for monitoring and visualizing build and deployment metrics. Apply CI/CD practices, maintain reliable tooling, and support evolving chip design architectures. The role requires production-quality software development using compiled and scripting languages, with opportunities to work on AI/ML, distributed systems, build systems, and full-stack development.

Develop and support Veeam Backup for Microsoft 365, collaborate across product development, and help plan and implement product features. The role requires strong C# expertise, knowledge of algorithms and data structures, relational database development, and public cloud experience. Familiarity with Windows, Linux, Exchange, SharePoint, Office 365, event-driven systems, and commercial software products is advantageous.

Develop and support the Geneva portfolio management platform and related systems for an asset management business. Responsibilities include building Windows and console applications in C# and .NET, integrating APIs and downstream applications, supporting SQL Server databases, testing deployments, documenting work, resolving production issues, and collaborating with business users on requirements. Financial services, Geneva, trade flow, and hedge fund experience are valuable.

Build and lead large-scale distributed, API-driven systems using C# and .NET. Develop AI-powered agents, intelligent workflows, automation, and observability capabilities across CoStar’s data platform. Design robust software, data models, and integrations with SQL Server and cloud services. Collaborate with Product, Research, and Data teams, establish engineering standards, conduct code reviews, and apply telemetry to improve reliability and operational efficiency.

Develops C++ ingest processing and mission software, C-based micro plugins, circuit and packet processing systems, and streaming data functionality. Troubleshoots network issues, modifies processing parameters and configurations, and supports data and VoIP processing for an Intelligence Community mission. The role is onsite at Fort Meade and requires an active TS/SCI clearance with Full Scope Polygraph.

Develop and maintain C++ components for a low-latency middle-office trading system. Responsibilities include integrating third parties, owning modules, implementing enhancements and bug fixes, optimizing latency, scale, and resiliency, debugging production systems, and supporting deployment and client rollouts. The role requires collaboration with distributed engineering and client-facing teams, knowledge of financial trading data, and proficiency in Linux-based C++ development.