Senior Software Engineer

Flint Hills Resources; Green Bay, Wichita (WI, KS); On-site; USD 110,000 - 160,000; Full time

Job summary

KBX, a Koch company, seeks a Senior Software Engineer to design and deliver scalable AI-enabled software for transportation and logistics platforms. You will own substantial product components and work closely with product, engineering, and business partners to produce production-ready solutions across the stack.

You will contribute to architecture discussions, improve performance and observability, mentor engineers, and ensure high-quality deliverables while upholding engineering standards and

Qualifications

• Experience delivering production software with AI-powered development tools.
• Proficiency in .NET and modern application frameworks.
• Backend services, APIs, and data access patterns.
• Experience with modern front-end frameworks or technologies.
• Experience supporting applications through the full software development lifecycle.
• Ability to translate business requirements into technical solutions.

Responsibilities

• Use AI-assisted and agentic engineering practices across discovery, design, coding, testing, documentation, and support while maintaining accountability for solution quality, security, and supportability
• Collaborate directly with Product Managers, Product Owners, Technical Leads, and business stakeholders to clarify problems and requests, challenge assumptions, evaluate tradeoffs, and deliver valuable business outcomes
• Design, develop, and maintain scalable full-stack software applications and services, writing clean, efficient, and maintainable code across backend and user-facing components
• Design and implement complex backend services, APIs, integrations, core system components, and user-facing application features
• Participate in architecture discussions, technology strategy, technical decision-making, code reviews, and technical design discussions to ensure adherence to engineering standards and best practices
• Provide technical guidance and mentorship to software engineers while helping resolve complex technical challenges
• Improve application performance, scalability, reliability, and observability
• Support and maintain existing applications by troubleshooting and resolving production issues

Skills

AI-powered development

.NET & frameworks

Backend services & APIs

Frontend features

Code reviews & design

Mentorship

Observability & performance

Troubleshooting production issues

Lifelong learning

Tools

PostgreSQL

MongoDB

Docker

Kubernetes

AWS

Job description

At KBX, we use technology, market-based solutions, and operational excellence to create value for our customers and businesses. As a Senior Software Engineer, you will design and deliver scalable software solutions that support our transportation and logistics platforms. This AI-native product engineering role requires strong technical judgment, modern engineering practices, and ownership to turn ambiguous business problems into production solutions quickly, safely, and with fewer handoffs.

Our Team

We are the KBX Managed Freight Engineering team, focused on transforming freight management with innovative, AI-powered software solutions. Working closely with product, engineering, and business partners, we build and support scalable applications for shipment tracking, exception management, and carrier connectivity. Our collaborative, cross-functional team embraces modern engineering practices and empowers each member to take ownership and deliver meaningful business results.

What You Will Do

• Use AI-assisted and agentic engineering practices across discovery, design, coding, testing, documentation, and support while maintaining accountability for solution quality, security, and supportability
• Collaborate directly with Product Managers, Product Owners, Technical Leads, and business stakeholders to clarify problems and requests, challenge assumptions, evaluate tradeoffs, and deliver valuable business outcomes
• Design, develop, and maintain scalable full-stack software applications and services, writing clean, efficient, and maintainable code across backend and user-facing components
• Design and implement complex backend services, APIs, integrations, core system components, and user-facing application features
• Participate in architecture discussions, technology strategy, technical decision-making, code reviews, and technical design discussions to ensure adherence to engineering standards and best practices
• Provide technical guidance and mentorship to software engineers while helping resolve complex technical challenges
• Improve application performance, scalability, reliability, and observability
• Support and maintain existing applications by troubleshooting and resolving production issues
• Document code, technical designs, architectural decisions, and engineering processes
• Share reusable patterns, lessons, and practices that improve engineering speed and quality across teams

Who You Are (Basic Qualifications)

• Experience leveraging AI-powered development tools and solutions, including LLMs and agentic systems, while ensuring generated outputs meet standards for quality, security, maintainability, and business value
• Experience designing, developing, and maintaining software applications using .NET and related application frameworks
• Experience on backend services, APIs, integrations, data access patterns, and user-facing application features
• Experience developing user-facing application features using modern front-end frameworks or technologies
• Experience designing and developing APIs, integrations, service-oriented solutions, and translating business requirements into technical solutions
• Experience supporting applications through the full software development lifecycle
• Experience collaborating with product, engineering, and business stakeholders to deliver software solutions from discovery to production
• Experience delivering software through small, cross-functional teams with broad individual ownership and accountability for outcomes
• Experience leading technical activities including code reviews, complex designs, architecture discussions, and troubleshooting
• Experience mentoring or providing technical guidance to other engineers

What Will Put You Ahead

• Experience incorporating AI capabilities into enterprise software solutions
• Experience working on large software development teams delivering enterprise-scale applications
• Experience in transportation, logistics , supply chain, fleet management, or related industries
• E xperience using modern frameworks such as React, Angular, or Vue
• Experience designing and implementing microservices and distributed systems
• Experience with cloud-native development, containerization, and DevOps practices
• Experience with test strategy, test planning, and automated testing frameworks
• Experience improving system observability, monitoring, and operational excellence
• Experience with relational and document databases such as PostgreSQL and MongoDB

Hiring Philosophy

All Koch companies value diversity of thought, perspectives, aptitudes, experiences, and backgrounds. We are Military Ready and Second Chance employers. Learn more about our hiring philosophy here .

Who We Are

As a Koch company, KBX provides the global transportation, logistics and technology solutions that help our customers deliver life’s essentials to people all over the world. We develop and deploy cutting-edge technologies to deliver better solutions for increasingly complex supply chains. Our team of tenacious problem-solvers are driven to create real, long-term value for our customers.

At Koch, employees are empowered to do what they do best to make life better. Learn how our business philosophy helps employees unleash their potential while creating value for themselves and the company.

Our goal is for each employee, and their families, to live fulfilling and healthy lives. We provide essential resources and support to build and maintain physical, financial, and emotional strength - focusing on overall wellbeing so you can focus on what matters most. Our benefits plan includes - medical, dental, vision, flexible spending and health savings accounts, life insurance, ADD, disability, retirement, paid vacation/time off, educational assistance, and may also include infertility assistance, paid parental leave and adoption assistance. Specific eligibility criteria is set by the applicable Summary Plan Description, policy or guideline and benefits may vary by geographic region.

Equal Opportunity Employer, including disability and protected veteran status. Except where prohibited by state law, some offers of employment are conditioned upon successfully passing a drug test. This employer uses E-Verify.