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

Kelly Services; Philadelphia (Philadelphia County); On-site; USD 130,000 - 140,000; Full time

Benefits offered by this job

Competitive salary incentives

Medical, dental, vision coverage

Life insurance

Retirement plan with company match

Paid leave and wellness benefits

Job summary

Motion Recruitment Partners is seeking an experienced software engineer to join a rapidly growing, global commerce technology organization. You will build enterprise-grade solutions across .NET, SQL Server, and modern front-end frameworks like React and Angular, in a secure, Agile environment.

You will contribute to payment, security, identity, and data analytics capabilities across web, mobile, and in-store platforms, with emphasis on performance, accessibility, and scalable architecture.

Qualifications

• 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.

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.

Skills

.NET

MVC

JavaScript

React

Angular

Redux

TypeScript

API security

JWT

SQL Server

SPA architectures

Agile/Scrum

Git

Web performance

Tools

Git

CI/CD

REST APIs

Job description

$130000 - $140000

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

Motion Recruitment Partners (MRP) is an Equal Opportunity Employer. All applicants must be currently authorized to work on a full-time basis in the country for which they are applying, and no sponsorship is currently available. Employment is subject to the successful completion of a pre-employment screening. Accommodation will be provided in all parts of the hiring process as required under MRP’s Employment Accommodation policy. Applicants need to make their needs known in advance.