Hire mid-level freelance Ruby on Rails developers in United States

1500+ Ruby on Rails developers looking for their next gig. Juniors to seniors and everyone in between, you'll find them all here.


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Senior Full Stack Software Engineer

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I'm Dallas Hart, a Senior Full-Stack Software Engineer with over a decade of experience building scalable, secure, and AI-integrated applications across fintech, healthcare, and e-commerce. My career has been driven by a passion for solving real-world problems through clean architecture, intelligent automation, and collaborative product development. My journey began with a love for building things that make people's lives easier — starting from early scripting projects to leading cloud-native application rollouts used by thousands. I’ve architected HIPAA-compliant health portals, PCI-secure payment platforms, and AI-powered fraud detection engines — all while optimizing for performance, reliability, and user experience. Whether I’m modernizing legacy systems or deploying microservices on AWS Lambda, I keep my focus on delivering measurable business outcomes. One of my proudest achievements was leading the development of a patient portal that reduced admin workload by 30%, while also integrating third-party AI to personalize content and drive engagement. I also designed a fraud detection system that cut chargebacks by 26% — blending ML with real-time Kafka and GraphQL. I bring a rare combination of deep technical expertise, strong product sense, and cross-functional collaboration. I thrive in environments where I can work closely with stakeholders and turn ambiguous business needs into robust systems that scale. If you're looking for someone who can own the full stack, drive AI integration, and push for engineering excellence — I’m your guy.

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Contract work welcome | 8 years experience | Rails | React | Hotwire

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Hi! I'm Liz 👋🏼 I'm about as full-stack 🥞 as they come. I started as a QA and automation engineer and now I'm a senior full-stack engineer focusing on Rails and React. Early on as a QA I worked on projects from writing SQL scripts to check data, to automation engineering, to React Native applications, and even helping implement Kafka instances and a team transition to Kubernetes. Then I moved on to development, mostly focusing on Rails / React stacks. I also am very comfortable working in Python. Now I've been a full stack developer for a few years, always carrying my QA mindset with me. I love exploring the ins and outs of a problem, and figuring out where I can pick it apart and expose weaknesses. I'm really great at building relationships with stakeholders, establishing trust and cooperation so that we can all move forward with a project in a very pragmatic way. Pairing with coworkers is always very enjoyable for me. I like the collaboration, but I really value the mentorship the most. Teaching juniors git has become a mainstay for me, as well as coaching them to maintain a calm mindset while debugging, encouraging them to move through issues in a systematic way. And of course I always fit in robust testing, showing folks how to create test suites and pipeline automation that will improve their workflow. Let's talk about how I can contribute to your team and stack 🙌🏻

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Full Stack Web Developer | Ruby, Hotwire & React

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I have over five years of experience working with Ruby on Rails and have developed a strong proficiency in utilizing the framework to build scalable, robust, and high-performance web applications. Throughout my career, I have developed a solid understanding of the fundamentals of Ruby on Rails, including building & maintaining large codebases by adopting appropriate design patterns and modularization. Additionally, I’m adept with testing frameworks such as RSpec & Minitest, ORMs such as ActiveRecord, Sequel, DataMapper & ROM, RESTful and GraphQL API services (including integrating external APIs and services), working with front-end technologies like HTML, CSS, and JavaScript/Typescript and frameworks like ReactJS and Hotwire + Stimulus + Turbo, and managing databases and data storage solutions. I am comfortable and adept at finding & fixing bugs using debugging tools, and identifying performance bottlenecks and issues using performance profiling tools. I have also collaborated with cross-functional teams, including product managers, designers, and other developers, to build new features and maintain existing applications. My experience has taught me the importance of writing clean and maintainable code, documenting code and project processes, and utilizing agile development methodologies to manage projects effectively. Overall, my experience with Ruby on Rails has equipped me with the skills and knowledge necessary to contribute to the development of complex web applications and work effectively within a team environment.

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