Senior Software Engineer / .NET / React / FinTech

Motion Recruitment; Philadelphia (Philadelphia County); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical, Dental, Vision Coverage

Life Insurance

Retirement Plan with Company Match

Commission Sharing Plan

Parental Leave Programs

Job summary

Motion Recruitment is seeking a Senior Software Engineer for an industry-leading platform company. You will work with .NET, SQL Server, React, Angular, TypeScript, and modern web technologies to build enterprise software supporting organizations across industries.

This role balances hands-on development with architectural influence, driving maintainable practices and secure coding in a performance-focused, transaction-heavy environment. Collaboration across teams and mentoring are valued.

Qualifications

• 7+ years of software development experience using .NET and SQL Server.
• Strong web development experience with ASP.NET MVC and jQuery.
• Deep understanding of SPA architectures including React, Angular, Redux, TypeScript, MicroUI's, and state management.
• Experience designing secure API layers and working with JWT authentication.
• Expert-level understanding of HTML, CSS, JavaScript, and web technologies.
• Strong knowledge of web performance, accessibility, and localization best practices.
• Experience breaking down monolithic applications into reusable components.
• Exposure to Agile software development methodologies.
• Strong SQL Server development skills.
• Understanding of secure coding practices.
• Experience using Git.
• Strong analytical, planning, and problem-solving skills.
• Effective written and verbal communication skills.

Responsibilities

• Demonstrate hands-on development across front-end, back-end, and database layers.
• Contribute to architectural discussions to shape platform evolution.
• Drive maintainable engineering practices and secure coding standards.
• Collaborate across disciplines to deliver scalable enterprise software.
• Troubleshoot performance, reliability, and security issues in a transaction-heavy environment.

Skills

.NET

SQL Server

React

Angular

TypeScript

JWT authentication

HTML/CSS/JavaScript

Web performance

Agile methodologies

Git

Security best practices

Tools

Git

Job description

An industry-leading platform company is seeking a Senior Software Engineer. This full-time opportunity offers the chance to work with .NET, SQL Server, React, Angular, TypeScript, and modern web technologies while developing enterprise software solutions that support organizations across retail, hospitality, healthcare, financial services, and other major industries.

This role is ideal for an engineer who enjoys balancing hands-on development with technical influence. Beyond building new features and enhancing existing applications, you'll contribute to architectural discussions, drive maintainable engineering practices, and help shape the evolution of a platform operating in a highly secure, transaction-heavy environment. The team is looking for someone who enjoys solving complex problems, collaborating across disciplines, and working on software where performance, reliability, and scalability matter every day.

Required Skills & Experience

• 7+ years of software development experience using .NET and SQL Server
• Strong web development experience with ASP.NET MVC and jQuery
• Deep understanding of SPA architectures including React, Angular, Redux, TypeScript, MicroUI's, and state management
• Experience designing secure API layers and working with JWT authentication
• Expert-level understanding of HTML, CSS, JavaScript, and web technologies
• Strong knowledge of web performance, accessibility, and localization best practices
• Experience breaking down monolithic applications into reusable components
• Exposure to Agile software development methodologies
• Strong SQL Server development skills
• Understanding of secure coding practices
• Experience using Git
• Strong analytical, planning, and problem-solving skills
• Effective written and verbal communication skills

Desired Skills & Experience

• Experience designing large-scale enterprise software solutions
• Experience with micro-frontend architectures
• Experience contributing to software standards and development best practices
• Experience influencing application architecture and technical direction
• Experience mentoring or guiding other developers
• Knowledge of payment processing or financial technology platforms
• Experience working within highly transactional systems
• Passion for continuous improvement and software craftsmanship

What You Will Be Doing

Tech Breakdown

• 40% Front-End Development (React, Angular, TypeScript)
• 35% Back-End Development (.NET, C#, APIs)
• 15% SQL Server Development
• 10% Architecture, Performance & Process Improvement

Daily Responsibilities

• 80% Hands-On Engineering
• 10% Technical Leadership & Architecture
• 10% Team Collaboration & Agile Ceremonies

The Offer

• Competitive Compensation
• 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.