Top 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.

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.

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.

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 test high-performance C++ applications for trading platforms. Collaborate with traders and experienced 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 complete trading-system development lifecycle, including production support, performance tuning, multithreaded programming, and real-time systems.

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.

Design, implement, and optimize foundational CUDA C++ libraries, parallel algorithms, utilities, and runtime abstractions. Own features across design, implementation, testing, profiling, benchmarking, documentation, and maintenance. Collaborate with compiler, Python, and Rust teams, engage with users on performance and correctness, and improve developer productivity through diagnostics, tooling, and CI integration.

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.

Build and maintain distributed, API-driven software for CoStar’s real estate data platform. Responsibilities include developing AI-powered solutions, integrating agents and intelligent workflows, improving observability and diagnostics, designing telemetry-driven systems, and delivering robust C#/.NET applications. The role also involves data modeling, code reviews, emerging technology evaluation, and collaboration in an agile environment.

Develop and maintain macOS systems software using modern C++, Swift, and Objective-C++. Work with process models, IPC, Endpoint Security, Network Extension, security and cryptography APIs, device and storage frameworks, packaging, deployment, and MDM tooling. Profile and debug performance using Instruments, LLDB, os_log, and os_signpost, while creating tests with XCTest, sanitizers, fuzzing, and xcodebuild CI. Support shared codebases across macOS, Windows, and Linux.

Develop and maintain cross-platform macOS systems software using modern C++, Swift, and Objective-C++. Work with IPC, daemons, system extensions, network and endpoint security, device and storage APIs, code signing, packaging, and deployment. Profile and debug performance issues, build automated tests and CI pipelines, and support Apple Silicon and Intel systems. Nice-to-have experience includes SwiftUI, AppKit, macOS beta testing, and shipping EDR, antivirus, network security, or device-management products.

Develop and maintain trading, risk, and operations applications using C#, .NET, and SQL. Support solution design, automated testing, code reviews, web UI development with TypeScript and React, Python scripting, and production issue investigation. The intern will work with systems including trade booking, FIX connectivity, market data, P&L services, risk reporting, gRPC services, and internal business applications while collaborating with senior engineers.

Design, implement, test, and modernize backend services and integrations (TypeScript/Node.js and C++). Lead large projects, write technical specifications and API contracts, enforce coding standards, coach engineers, and drive legacy-to-modern migrations within online banking and core systems.