Top C# Jobs in Minneapolis, MN

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.

Designs, develops, tests, operates, and maintains full-stack .NET software applications, APIs, and enterprise services. Responsibilities include writing production-ready code, creating scalable and reliable architectures, conducting code reviews, troubleshooting failures, improving operations, supporting production applications, and applying security, compliance, DevOps, and software reliability practices. The role requires collaboration with product, engineering, vendors, and business stakeholders.

The Senior Software Engineer will design, develop, test, and maintain high-performance real-time visualization software for Medtronic’s cardiac mapping and ablation system. Responsibilities include desktop UI development, network and serial device communications, asynchronous integration, performance optimization, fault recovery, automated testing, documentation, and cross-functional collaboration with hardware, QA, and DevOps teams. The engineer will also participate in pre-clinical in-vivo system evaluations and work onsite at least four days per week.

Designs, develops, and implements control systems for water and wastewater treatment facilities. Creates electrical drawings and schematics in AutoCAD, collaborates with multidisciplinary engineering teams, and ensures projects meet specifications, safety requirements, and quality standards.

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.

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.

Lead architecture and development of high-throughput document-processing services, primarily in Rust with C#/.NET support. Design distributed, highly available queue-driven systems; optimize performance, memory, concurrency, and reliability; evolve APIs and schemas safely; and operate services in production. Lead complex projects, mentor engineers, write technical designs, evaluate AI coding agents, collaborate across teams, and participate in on-call and incident response.

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.

Build and lead high-performance browser features in modern C++ and Chromium, including tracker blocking, subscription integrations, and responsiveness monitoring. Own complex projects from proposal through post-mortem, solve ambiguous technical problems, make architecture decisions, collaborate asynchronously with product and design, and use metrics to evaluate outcomes in a large-scale consumer codebase.

Build and maintain scalable, cloud-native APIs and high-value core system components using .NET and related technologies. Lead software architecture and testing discussions, enhance core offerings, collaborate cross-functionally, and ensure quality through code reviews, unit testing, functional testing, telemetry, and performance tuning. Mentor teammates and contribute to continuous technical and process improvement.

Leads the design, development, modernization, and support of high-performance, low-latency trading software using C++ and FIX. Integrates real-time market data, improves scalability and reliability, oversees testing, debugging, code reviews, deployment automation, documentation, and disaster recovery. Mentors engineering teams, collaborates with traders and analysts, provides technical leadership, and drives adoption of modern technologies and software development practices in a mission-critical trading environment.

Leads and develops a software engineering team while contributing hands-on to enterprise application design, coding, testing, code reviews, production support, and technical decisions. Builds scalable solutions using C#, ASP.NET, SQL Server, and modern web technologies; partners with product and business stakeholders; supports Agile delivery, CI/CD, troubleshooting, root cause analysis, and engineering best practices. The role also includes mentoring engineers, monitoring delivery and operational metrics, and driving continuous improvement.

Lead modernization of a 30-year-old Store Management System by reverse engineering EZC file-based platforms, migrating data and applications to PostgreSQL, and developing enterprise C/C++ software. Responsibilities include architecture, systems integration, APIs, ETL, performance optimization, troubleshooting, documentation, and maintaining business continuity. The role also applies AI-assisted development tools for code analysis, documentation, testing, and modernization while mentoring teams and supporting legacy and modern environments.

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.

Design and develop low-latency, high-throughput distributed database kernels for massively parallel analytics. Responsibilities include architecture, modern C++ development, MPI/OpenMP query execution, SIMD and hardware optimization, distributed networking, database internals, in-database machine learning, vector indexing, performance tuning, code reviews, mentoring, and resolving scalability issues across large-scale clustered systems.

Design and develop massively parallel distributed database kernels for real-time analytics at terabyte and petabyte scale. Responsibilities include low-level C++ development, MPP query execution, SIMD and hardware optimization, distributed communication using MPI and RDMA technologies, database internals, vector indexing, in-database machine learning, performance tuning, architecture reviews, mentoring, and resolving scalability issues.

Design and develop low-latency, high-throughput distributed database kernels for massively parallel analytics. Responsibilities include query execution, columnar storage, transaction management, cluster coordination, hardware-aware optimization, SIMD vectorization, RDMA networking, in-database machine learning, vector indexing, performance tuning, architecture reviews, code reviews, mentoring, and resolving scalability issues.

Design, implement, and maintain cloud-native, edge-connectivity, and distributed data services. Build performant, secure microservices and REST APIs, maintain CI/CD and DevOps tooling, debug integration/performance issues, and mentor teams within an Agile/SAFe environment.

The C# / .NET Developer will design and maintain middleware applications, build Shopify integrations, and support a mobile app backend in a remote work environment.

Develop user interface components for ArcGIS Pro using C# and WPF, work in an agile team, and design software solutions for raster and imagery processing.

PrivateID seeks a Principal C++ Engineer with at least 10 years of experience to lead complex systems and scale their platform in a remote-first environment.

You will develop and maintain components of the LLVM based toolchain, collaborating with the community while ensuring platform-specific optimizations and tests.

Design, develop, test, document, and implement C#/.NET applications per technical specifications. Interpret business requirements, produce architectural and technical documentation, create unit test plans and harnesses, estimate tasks, validate accessibility and secure coding, and collaborate with infrastructure/network/server teams to resolve application issues.

Develop and maintain C#/.NET applications and ETL processes using Pentaho and Oracle 11g. Work with XML, Excel/VBA, and TFS for data integration and automation. Collaborate with stakeholders, perform application development, and support BI/ETL solutions. Strong communication and local interview availability required.