Jobs and Careers

Principal Software Engineer (Payment Solutions)

Overland Park, United Statesfull_timeVerifiedPosted 6 Aug 2025

About the role

Company Overview Shamrock Trading Corporation is the parent company for a family of brands in transportation services, finance and technology. Headquartered in Overland Park, KS, Shamrock is frequently recognized among the “Best Places to Work” in Kansas City and Chicago and was most recently recognized as one of America’s top 100 “Most Loved Workplaces” by Newsweek. We also have offices in Atlanta, Chicago, Dallas, Ft. Lauderdale, Houston, Laredo, Nashville, Philadelphia and Phoenix. Overland Park is a great place to live, work and play, being conveniently located within driving distance of everything Kansas City has to offer. Housed within the heart of Overland Park, our offices include 4 gorgeous towers on the East and West sides of Metcalf Ave. With a heavy community presence and a winning culture, Shamrock is a great place to work in Overland Park! With an average annual revenue growth of 25% over several decades, Shamrock’s success is attributed to three key factors: hiring the best people, cultivating long-term relationships with our customers and continually evolving in the marketplace. Responsibilities Shamrock Trading Corporation is looking for a Principal Software Engineer to join our Payment Solutions Engineering team. This role is responsible for designing, developing, and implementing scalable, efficient, and maintainable Fintech and payment software systems that meet the business needs of the organization. As a key technical leader, the Principal Software Engineer will mentor engineers and provide guidance on application architecture, interface with enterprise architecture, design, and best practices across multiple software projects and teams. The ideal candidate will have expertise in multiple programming languages and technologies, with a strong understanding of software engineering principles, cloud computing,containerization, and Agile practices. This role is crucial for driving innovation, improving technical processes, and delivering high-quality software products to customers.

Provide both technical expertise and inspiration, fostering an environment where complex problem-solving and creative engineering flourish
Lead the design, architecture, and implementation of complex software systems, ensuring alignment with business goals, enterprise systems and industry best practices
Drive innovation by researching, prototyping, and implementing modern technologies, tools, and methodologies that enhance our software development processes
Provide mentorship and guidance to software engineers and other technical team members, fostering a culture of continuous learning and professional growth.
Work closely with cross-functional teams to deliver high-quality software solutions
Establish and enforce coding standards, best practices, and code reviews to ensure the delivery of clean, maintainable, and efficient code
Design and implement scalable, high-performance, and resilient software architectures that meet the demands of our growing user base
Tackle complex technical challenges and provide strategic solutions that address both current and future needs of the business
Create and maintain comprehensive technical documentation, including system architecture, design patterns, and development guidelines
Champion continuous improvement initiatives, including process optimization, automation, and the adoption of modern development practices

Qualifications

Bachelor's or Master’s degree in Computer Science, Software Engineering, or a related field
8+ years of experience in Fintech and/or modern payment solutions software engineering, with at least 3 years in a senior or lead engineering role
Strong proficiency in JavaScript, React, React Native, microservices architecture, and containerization. Experience with cloud platforms such as AWS, Azure, or Google Cloud Expertise building and working with APIs
Strong technical knowledge, with hands-on experience building Fintech and/or BaaS payment solutions platforms; knowledge or relevant technology, tools, and middleware is critical covering compliance, onboarding, KYB/KYC and fund flows
Proven experience leading and mentoring software engineering teams, with a record of accomplishment delivering high-quality Fintech software products
Deep expertise in payment solutions, specifically including bank payment rails such as ACH, Fed wires, RTP, Fed Now, and/or API Payment Integrations
Expertise building high-volume transactional proce