Senior Software Engineer / .NET / React / FinTech

By myKelly | October 12, 2026

Senior Software Engineer / .NET / React / FinTech

Apply On Motion Recruitment Applied

Job ID: mrp-892256

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Philadelphia, ,

Information Technology

Full Time,

$130000 - $150000

On-site

Other/Non Classified

Philadelphia, ,

$130000 - $150000

Full Time,

Other/Non Classified

On-site

Information Technology

Apply On Motion Recruitment Applied

Job details

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.

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As part of our promise to talent, Kelly supports those who work with us through a variety of benefits, perks, and work-related resources. Please note: The following benefits reflect Kelly's general offerings. Eligibility may vary by assignment, location, and job type. Kelly offers eligible employees voluntary benefit plans including medical, dental, vision, telemedicine, term life, whole life, accident insurance, critical illness, a legal plan, and short-term disability. As a Kelly employee, you will have access to a retirement savings plan, service bonus and holiday pay plans (earn up to eight paid holidays per benefit year), and a transit spending account. In addition, employees are entitled to earn paid sick leave under the applicable state or local plan. Click here for more information on benefits and perks that may be available to you as a member of the Kelly Talent Community.



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