Senior .NET Developer/Hybrid/Philadelphia/$140k

Join a rapidly growing global commerce technology organization that powers some of the world's largest enterprises. This full-time opportunity is ideal for a seasoned software engineer with deep expertise in .NET, SQL Server, and modern front-end frameworks such as React and Angular. Operating within a highly secure, enterprise-scale environment, you'll help build innovative payment, security, identity, and data analytics solutions that support omnichannel commerce experiences across web, mobile, and in-store platforms.
This employer offers the opportunity to work on mission-critical applications used by leading global brands while collaborating with talented Agile teams in a fast-paced, high-growth environment. The role provides significant exposure to modern web architectures, API ecosystems, cloud-connected commerce technologies, and large-scale enterprise software development. For professionals seeking technical challenges, career growth, and the ability to influence the future of a rapidly expanding platform, this is an exceptional opportunity. Required Skills & Experience

• 7+ years of software application development experience using .NET and SQL Server
• Strong experience building web applications using MVC, JavaScript, jQuery, HTML, and CSS
• Deep expertise in modern SPA architectures and frameworks including React, Angular, Redux, TypeScript, and state management patterns
• Experience developing and securing API layers using modern authentication and authorization practices (JWT tokens, API security, secure coding standards)
• Strong understanding of Micro Frontends/Micro UI architectures
• Experience with server-side rendering implementations
• Advanced knowledge of web performance optimization, localization, and accessibility best practices
• Experience decomposing monolithic applications into reusable, scalable components
• Strong SQL Server database development and optimization skills
• Hands-on experience working within Agile/Scrum development environments
• Familiarity with Git version control and collaborative development workflows
• Experience with accurate effort estimation, sprint planning, and task management
• Strong problem-solving and analytical skills with a focus on delivering maintainable solutions
• Excellent written and verbal English communication skills
• Proficiency with Microsoft Office applications
• Understanding of secure coding, application security, and software quality practices
• Ability to successfully pass criminal background and credit checks

Desired Skills & Experience

• Experience developing enterprise-scale commerce, payment processing, fintech, or transaction-based platforms
• Exposure to payment industry standards and PCI-compliant environments
• Experience designing reusable libraries and shared application frameworks
• Knowledge of WebSockets and real-time application development
• Experience collaborating across multiple product teams and stakeholders
• Familiarity with CI/CD pipelines and automated testing practices
• Experience mentoring developers and promoting software engineering best practices
• Strong technical documentation and architectural design experience
• Passion for learning emerging technologies and evolving platform architectures

What You Will Be Doing Tech Breakdown

• 40% Front-End Development (React, Angular, TypeScript, SPA Architecture)
• 30% Back-End Development (.NET, APIs, SQL Server)
• 15% System Design & Architecture
• 10% Agile Collaboration & Sprint Planning
• 5% Documentation, Process Improvement & Stakeholder Communication

Daily Responsibilities

• Participate in Agile Scrum ceremonies including sprint planning, estimation, story creation, and delivery
• Analyze business requirements and translate specifications into scalable system designs
• Apply systems thinking to develop solutions across multiple products and technology environments
• Influence application architecture, maintainability, and long-term platform stability
• Develop reusable libraries, frameworks, and software components
• Deliver high-quality, consistent, and secure software solutions
• Contribute to software standards, engineering best practices, and process improvements
• Define project deliverables, tasks, and release objectives
• Collaborate with QA teams to ensure comprehensive testing, coverage, and execution
• Partner with internal stakeholders to understand priorities and business goals
• Update and maintain technical documentation
• Continuously develop expertise in payment technologies, commerce platforms, and industry trends
• Adapt to evolving hardware, software, and payment processing ecosystems

The Offer

• Competitive base salary plus potential performance-based incentives
• Medical, prescription, dental, and vision coverage
• Life insurance benefits
• Retirement savings plan with company match
• Additional paid leave and wellness benefits