Senior Software Engineer / Cloud Middleware / Device Integration

Motion Recruitment; Philadelphia (Philadelphia County); On-site; USD 130,000 - 170,000; Full time

Benefits offered by this job

Medical, Dental, and Vision Coverage

Life Insurance

Retirement Plan with Company Match

Commission Sharing Plan

Parental Leave Programs

Bonus Eligible

Job summary

Motion Recruitment seeks a Senior Software Engineer to design and implement middleware and integration solutions, with heavy emphasis on backend systems using .NET/C#. You will work on hardware integrations, REST services, and cloud-based transaction processing across multiple industries.

The role targets backend engineers who enjoy solving complex integration challenges, operating close to systems that drive critical business operations, and delivering scalable platforms with a focus on

Qualifications

• 7+ 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, HTTP, HTTPS, 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.

Responsibilities

• Develop middleware and integration solutions for high-scale environments.
• Collaborate on device and hardware integration efforts.
• Build backend components using .NET/C# and REST services.
• Contribute to cloud technologies and secure transaction processing.
• Document interfaces for third-party consumption and ensure security practices.

Skills

C#

ASP.NET

.NET Framework 4.6.2+

REST APIs

High-throughput systems

Distributed systems

Multi-threaded

Hardware integration

Networking (TCP/IP, HTTP, SSL)

Agile/Scrum

Security/compliance

Tools

Git

VS 2019+

Job description

A 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 & Experience

• 7+ 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, HTTP, HTTPS, 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 & Experience

• Experience 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 Offer

• Bonus 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.