Principal Software Engineer (Payment Solutions)

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.

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
  

• 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 processing and cloud first/native distributed systems
  
• Exceptional analytical and problem-solving abilities, with a focus on strategic thinking and innovative solutions
  
• Excellent verbal and written communication skills, with the ability to articulate complex technical concepts to diverse audiences
  
• Strong understanding and experience with Agile development practices, including Scrum and Kanban
  
• Proven experience integrating payment technologies, such as Plaid, Finicity, Stripe, Paypal
  
• Experience delivering solutions requiring banking standards such as NACHA and card processing certifications PCI and ISO 8583
  
• Strong experience building exception-based operational workflow automation, alerting, and frontend tools
  

At Shamrock we hire bright, ambitious people and give them the tools they need to be successful. By investing in training and development, we hope to become a long-term career for employees, where there are always opportunities for advancement. Shamrock also offers a premier set of benefits for employees and their families:*

• Work-Life Balance: Competitive PTO and paid leave policies
  
• Financial: Generous company 401(k) contributions and employee stock ownership after one year
  
• Wellness: Onsite gym and discounted membership to select fitness centers. Jogging trails available at Overland Park offices
  

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