Top Senior C# Jobs

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.

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.

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.

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.

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.

Designs and develops scalable cloud-native APIs and services using C# and ASP.NET Core on Microsoft Azure. The role modernizes legacy desktop applications into distributed, service-oriented solutions, implements secure and observable systems, and contributes to architecture, testing, CI/CD, Agile delivery, and engineering best practices. Responsibilities also include mentoring engineers, participating in code and design reviews, and supporting platform modernization initiatives.

Owns the full lifecycle of critical banking applications and services, including architecture, development, testing, deployment, modernization, production support, and retirement. Designs secure, resilient solutions using C#/.NET, APIs, databases, cloud platforms, containers, and DevOps tooling. Leads technical analysis, code and design reviews, incident response, resiliency improvements, regulatory compliance, and cross-team coordination. Mentors engineers and evaluates AI-assisted development tools while maintaining security, quality, and operational standards.

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.

Architect and implement core blockchain consensus and networking software in modern C++. Integrate zero-knowledge proofs, homomorphic encryption, MPC, and cryptographic primitives; optimize high-throughput transaction processing and low-latency P2P networking; maintain cross-platform CMake/Bazel builds; enforce memory safety and secure coding practices; and conduct rigorous security-focused code reviews.

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.

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.

Develop and deploy secure payer interoperability solutions using C#/.NET, HL7 FHIR, ASC X12, MongoDB, and Azure. Build APIs, claims and prior authorization workflows, cloud-native data exchange pipelines, and CI/CD deployments. Manage Azure storage, messaging, secrets, and API governance while collaborating with technical and business stakeholders to deliver scalable healthcare integration services.

Develop scalable full-stack applications, secure APIs, microservices, event-driven integrations, and production AI solutions. Build agentic workflows, semantic search, and conversational tools using modern AI frameworks. Deploy cloud workloads with CI/CD, containers, Kubernetes, and infrastructure as code while implementing security, compliance, governance, monitoring, and observability. Collaborate with product, architecture, data, security, and business teams to translate requirements into enterprise-grade financial technology solutions.

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

Build and maintain desktop digital experience applications and platforms for financial services customers. Develop end-to-end features in cross-functional teams, create prototypes, optimize performance and memory usage, and apply scalable software architecture. Use .NET, C#, XAML, WPF, MAUI, or Xamarin alongside APIs, microservices, CI/CD, automated testing, and DevOps tools. Contribute to product decisions, technical discussions, continuous learning, and customer-focused improvements.