Senior Software Engineer / Cloud Middleware / Device Integration

Philadelphia, PAHybridFull Time$140k - $160kA market-leading technology firm is hiring a Senior Software Engineer. This full-time opportunity offers the chance to work with C#, .NET, REST services, SQL, cloud technologies, and hardware device integrations while developing high-performance middleware solutions that support secure, large-scale transaction processing environments across multiple industries.This role is ideal for a backend engineer who enjoys solving complex integration challenges and working close to the systems that power critical business operations. You'll work directly with hardware devices, cloud middleware, and secure transactional services while helping expand a highly scalable platform. The team is looking for someone who enjoys technical problem-solving, systems integration, and building solutions that operate behind the scenes but play a critical role in the overall customer experience.Required Skills & Experience7+ years of software development experience Strong experience with .NET Framework 4.6.2+ and Visual Studio 2019+ Strong C# and ASP.NET development experience Strong object-oriented design and programming skills Experience building REST services and distributed applications Experience developing multi-threaded, high-throughput transactional systems Direct experience integrating with hardware devices Experience building and documenting interfaces for third-party consumption Strong understanding of software architecture, coding standards, source control, and testing best practices Working knowledge of networking technologies including TCP/IP, SSL, SSH, WiFi, and socket programming Experience with Agile/Scrum methodologies Knowledge of data security, encryption, compliance, and privacy requirements Strong communication, troubleshooting, and problem-solving skills Ability to manage multiple priorities in a fast-paced environment Desired Skills & ExperienceExperience with SQL Server, SQLite, and relational database technologies Familiarity with Git, Wireshark, and other development and troubleshooting tools Experience with Java, Kotlin, or additional object-oriented programming languages Working knowledge of Linux, virtualization technologies, and containerization platforms Experience with cloud environments including Azure, AWS, or GCP Experience supporting high-volume transactional systems Experience within payment processing, financial services, or commerce-related industries What You Will Be Doing Tech Breakdown 40% Middleware & Integration Development 25% Device & Hardware Integrations 20% Backend Development (.NET/C#) 15% Cloud Technologies & Transaction Processing Daily Responsibilities 80% Hands-On Engineering 10% Team Collaboration 10% Planning, Testing & Technical Standards The OfferBonus Eligible You will receive the following benefits: Medical, Dental, and Vision Coverage Life Insurance Retirement Plan with Company Match Commission Sharing Plan Parental Leave Programs Applicants must be currently authorized to work in the US on a full-time basis now and in the future.