Senior Software Engineer, Integrations

A little about us…Fleetio is a modern software platform that helps thousands of organizations worldwide manage their fleet operations. Transportation technology is a hot market, and we’re leading the charge with raving fans and new customers signing up every day. We raised $450M in our Series D funding round in March of 2025 and are on an exciting trajectory as a company. Fleetio is also a proud founding member of the Rails Foundation ! More about our team and company: Fleetio overview video: https://www.youtube.com/watch?v=YoXyXTFWbkg Our careers page: https://www.fleetio.com/careers Description Fleetio is seeking a Senior Software Engineer to join our Integrations team. In this role, you’ll work across the stack to deliver thoughtful, reliable solutions—building intuitive partner-facing experiences while supporting the backend systems and integrations that power them. You’ll play an important role in improving usability and design quality across the product, while also helping scale data flows and integrations with external partners. This is a remote opportunity open to candidates in the United States, Canada, or Mexico. Who You Are You’re a senior, product-minded engineer who enjoys working across frontend and backend systems and cares deeply about how software is experienced by users. You bring a strong foundation in modern web development and a thoughtful approach to UI, usability, and design consistency. You’re comfortable navigating complex domains that involve integrations, external systems, and large datasets, and you balance user experience considerations with scalability, performance, and maintainability. You communicate clearly, collaborate well with cross-functional partners, and take pride in writing high-quality, well-tested code. Our Team Fleetio’s Engineering team is organized into cross-functional pods focused on delivering meaningful customer value. As part of the Integrations team, you’ll work closely with engineers, designers, and product managers to build reliable, easy-to-use tools that support our partners’ success. We value collaboration, clear communication, and continuous improvement, and we aim to create an environment where engineers can do their best work. Your Impact Collaborate closely with Product Managers, Designers, and Engineers to deliver high-quality solutions for Integration Partners. Build and evolve partner-facing user experiences with a focus on clarity, usability, and design consistency. Develop and maintain backend functionality that supports integrations, workflows, and data processing. Help design and implement new integrations with external partner systems and data sources. Work with complex and high-volume data to ensure reliability, performance, and accuracy. Contribute to technical and architectural decisions within the Integrations team. Deliver well-tested, maintainable, and performant code across the stack. Provide thoughtful code reviews and mentorship to help raise the quality and consistency of the team’s work. Participate actively in planning, discovery, and iterative improvement of features. Your Experience 5+ years of professional experience building production software with Ruby on Rails. 2+ years of experience building modern, user-focused web applications with React and TypeScript. Strong understanding of frontend best practices, including component architecture, state management, and performance considerations. Experience working closely with designers and translating designs into polished, accessible user interfaces. Experience building and consuming APIs and working with external integrations. Comfort working with data-intensive systems and complex business logic. Experience writing unit, integration, and UI tests. Familiarity with relational databases (PostgreSQL preferred). Strong written and verbal communication skills. Be sure to mention “coffee” in your application so we know you actually read this. Considered a Plus Exp ... (truncated, view full listing at source)