Senior Software Engineer, Core

Fleetio

full-time

Posted on: 8/20/2025

Location: 🇺🇸 United States

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Senior

ElasticSearchGoPostgresReactRubyRuby on RailsTypeScript

About the role

Design and evolve mission-critical backend systems and frameworks that power features across Fleetio’s product verticals.
Collaborate with Product Managers, Designers, and Engineers in a highly async environment to consistently deliver high-quality software.
Build systems that are scalable, observable, and well documented, setting patterns and communicating best practices for the broader engineering org.
Mentor and support engineers through code reviews, async discussions, and technical guidance, raising the bar for engineering quality.
You will take part in planning, designing, and implementing solutions for our Core framework products.
Lead the design and architecture of new frameworks, ensuring reliability, maintainability, and long-term scalability.
You will engage in collaborative design and architecture of features.
You will produce well-tested, maintainable, and performant code.
You will research and implement prototypes and spikes as necessary to validate assumptions and technical feasibility.
You will express your opinions to help drive development and planning processes.
You will thoroughly review your peers' code to ensure quality, maintain consistency, and share knowledge

5+ years of experience with Ruby on Rails, with deep expertise in backend architecture and design patterns.
Experience with React and TypeScript, capable of contributing to full stack solutions.
Proven ability to ship and iterate quickly, moving fast while maintaining high technical quality.
Strong understanding of object-oriented programming and relational databases (PostgreSQL preferred).
Experience designing scalable, observable, and well-documented systems.
Clear, intentional communication skills with a track record of thriving in a highly async environment.
Experience with unit testing frameworks
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