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Software Engineer, Ruby on Rails

🌐 Remote💼 Full-time💰 $149,000–$149,000🗓 2026-06-24

Core

Junior engineer building features for transactions and payments systems in the trucking industry.

Role type

Junior IC backend engineer (Ruby on Rails)

Builds

Transaction and payment features for a marketplace serving truckers and fuel partners

Domain

Fintech / Trucking logistics

Deliverable

production ML models | product features

Required skills

Ruby on Rails, SQL (joins, indexes), Git, REST APIs, Postgres, AWS, ECS, CircleCI

Preferred skills

Financial technology, payment systems

Technologies

Ruby on Rails, Postgres, AWS Aurora, Vue.js, Swift, Kotlin, AWS, ECS, CircleCI

Responsibilities

Build features for transactions and payments systems, Implement APIs and endpoints, Write clean and tested code, Debug and fix issues, Collaborate in code reviews, Document work, Take ownership of small to medium features

Seniority

Junior, hands-on IC

Rewrite
## About the role Mudflap serves the $800B trucking industry, the backbone of the U.S. economy. Our market-leading payment products help truckers save thousands of dollars on fuel (their #1 business expense), while providing our fuel stop partners with access to new, hard-to-reach customers. We're a fast-growing marketplace business looking for a new exceptional junior engineer to join our transactions and payments team. ## Work Location This can be a fully remote position. While we operate across multiple time zones, most collaboration happens during Pacific Time working hours. Candidates should be able to work a schedule aligned with the PT time zone. ## Expectations (In this role, you will) - Build features for our transactions and payments systems using Ruby on Rails - Implement APIs and endpoints following established patterns and guidance - Write clean, well-tested and maintainable code with attention to edge cases - Debug and fix issues within your area of responsibility - Collaborate in code reviews to improve your skills and learn best practices - Document your work to support knowledge sharing - Take ownership of small to medium features from implementation to deployment - Learn our domain-specific knowledge in payments and transaction processing - Be flexible and adapt to the changing needs of a startup environment ## Experience (What we look for) - 1-2 years of professional software development experience - Bachelor's or Master's degree in Computer Science or equivalent - Familiarity with Ruby on Rails or similar web frameworks - Ability to work with SQL databases, including writing queries with joins and understanding indexes - Knowledge of Git version control workflows - Strong problem-solving skills and attention to detail - Eagerness to learn and grow as a software engineer - Good communication skills and team collaboration abilities - Interest in financial technology and payment systems is a plus ## Our Stack - Backend/API -- Ruby on Rails - Database -- Postgres / AWS Aurora - Web -- Vue.js and REST - iOS -- Native (Swift) - Android -- Native (Kotlin) - Hosted on -- AWS, deployed as containers on ECS - CI/CD -- CircleCI pipeline ## Perks and Benefits (What we offer) - Competitive salary and equity in a high-growth startup - Multiple health benefit options - Responsible Time Off - 401(k) matching - Opportunities and support for major career growth - Annual Company offsite event (Mudfest!) ## Company overview (Who we are) Mudflap is on a mission to transform the trucking and logistics industry by leveling the playing field for owner operators and small fleets. Backed by top-tier venture investors, including QED, Matrix Partners, Commerce Ventures, NFX, and 500 Startups and included in the Forbes Fintech 50 list, Mudflap offers fleet fuel management solutions. Our core team hails from Disney, Uber, Procore, DoorDash, Google, Meta, Capital One, Affirm and Brex. ## Core values Here are the core values that we believe in and look for in new teammates: - Be Customer Obsessed: We deeply understand customer needs and put our customers at the center of everything we do - Make it Count: Act like an owner by focusing on the impact of your work - Find a Way: Be a creative problem solver who pushes past roadblocks to win for our customers and our teammates - Sweat the Details: We keep our standards high and achieve them by paying attention to every detail - Be Curious: Use a growth mindset to question assumptions, take calculated risks and stretch the boundaries of what's possible
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