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Top freelance Ruby on Rails developers available to hire

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Freelance Ruby on Rails Developer - Wayne Liu
Freelance Ruby on Rails Developer5.0 (5 reviews)

GitHub: https://github.com/waynel LinkedIn: https://www.linkedin.com/in/wwwayneliu/ Note: For the past 2 years, I've been heavily focused on AI Engineering and AI-augmented Software Engineering - building features that use large language models (data entry automation, retrieval augmented generation and text-to-SQL chatbots) and experimenting with AI tools to improve my engineering workflow. I've been working as a software engineer for 12+ years that has been mainly focused on web application development and some systems development, in NYC and Boston. Have had full-time roles at 4 startups and 1 corporation. I come from a strong computer science background, having graduated from Carnegie Mellon University. My experience lies both in computer science fundamentals and shipping projects end-to-end as a full stack generalist - frontend, backend, data, and SRE. Having worked at startups, I've learned to be versatile, doing some minor product and project management as well. In addition, I've launched 3 full stack side projects. With 5 years of experience mentoring other engineers, I've conducted 50+ technical interviews and have been interviewed 20+ times. I enjoy helping others - it's fulfilling to help others level up while also helping my own continuous learning! Some potential areas I can help with: - brushing up on computer science fundamentals - preparing for software engineering interviews (data structures and algorithms coding problems, system design, behavioral) - pair programming on a project, recommending best practices for frontend, backend, data, and SRE - code review - debugging - testing - resume review - career strategy consultation

Freelance Ruby on Rails Developer - Mark Nyon
Freelance Ruby on Rails Developer5.0 (10 reviews)

I’m a Technical Lead and Full-Stack Developer with 17+ years of experience delivering robust web applications and SaaS platforms. I have led engineering teams through complex projects, balancing hands-on development with mentoring and process improvements to consistently meet aggressive deadlines. Notably, I helped scale infrastructure and improve performance for SaaS products used by tens of thousands of users. I excel at driving feature delivery end-to-end—whether implementing APIs, optimizing workflows, or guiding teams—as a dependable executor and problem solver.

Freelance Ruby on Rails Developer - Carlos Aguilar
Freelance Ruby on Rails Developer4.9 (67 reviews)

I’m a senior mobile + backend engineer with 20+ years in software (PHP since 2002; professional since 2005) and 10+ years building mobile apps. I help teams ship and stabilize real products—especially apps that are “almost done” but stuck on crashes, performance, flaky networking, or release blockers. What I can help you with (fast, practical): • iOS (Swift, SwiftUI, UIKit): crash fixes, performance/memory, concurrency issues, architecture cleanup • Flutter (iOS/Android/macOS): reliability, state consistency, networking/retry behavior, release readiness • Backend stability (PHP/Laravel or custom, Python/Django, Rails): idempotency, queues, DB performance, webhook safety • Firebase + mobile reliability: Auth/Firestore rules, Cloud Functions patterns, analytics/instrumentation • Monetization + shipping: RevenueCat/IAP reliability, App Store Connect/Play Console, CI/CD, rejection handling Recent work includes taking a messy iOS codebase (CakeClub) to production-ready with a Firebase Cloud Functions v2 backend, stronger security patterns, CI/release automation, and RevenueCat integration; and delivering major cross-platform Flutter work (BillBlaster) including design refinements, admin tooling, and push notification features. If you come with logs/screenshots (Crashlytics traces, network errors, repro steps), I’ll give you a clear diagnosis and a prioritized fix plan—and if it makes sense, I can execute the fixes as a focused sprint.

Freelance Ruby on Rails Developer - Samir Habib Zahmani
Freelance Ruby on Rails Developer5.0 (446 reviews)
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So, you want to create a fancy website or web application. You *"embellished"* your resumé by saying you are a competent web developer, and now you've landed the job and don't know where to start. You keep hearing about cross-platform mobile apps, where writing a single piece of code gives you an Android AND an IOS app, but don't know much beyond that. You know the basics of HTML/CSS/JS but everyone keeps bugging you about React this, Fullstack that, and you have no idea what that is, and would like to change that. Or... you’re starting from zero and you simply wish to learn. If you fit in any of those categories (and others), I'm your man. If you’re feeling overwhelmed by the overabundance of tools, frameworks and fancy terms, don’t fret, **we’ve all been there**. And I’m here to make the process painless. We can take things one step at a time, no matter your level. Or maybe you just want help looking over your code, smoothing out bugs, or someone to accompany you while you bring your next idea to life. Not to worry; I can help. I have over **8 years** of experience as a Fullstack NodeJS developer, with a special focus on React and React-native, which is basically just fancy lingo for saying I make websites, apps and mobile apps very fast. I can accompany you on your journey from absolute beginner to expert level, if you'll give me a chance.

Freelance Ruby on Rails Developer - Muhammad Hassan
Freelance Ruby on Rails Developer

Greetings! My name is Muhammad Hassan and I am thrilled to be a **Full Stack** Engineer hailing from the beautiful city of Lahore, Pakistan. With five years of solid experience in the software development industry, I am eager to share my passion for technology and innovation with you. Currently, I am working as a **Frontend Engineer** for Stadim Data, where we are developing cutting-edge products and tools to digitalize the workflows for real estate valuation. I work **remotely**, but the work we do is as exciting as if we were in the same office! I am proud to have completed my Bachelor's degree in Computer Science from the renowned University of the Punjab. In my career, I have had the pleasure of working with a diverse array of companies, ranging from small to medium-sized businesses and startups, which has given me a broad perspective on the industry. Throughout my journey, I have honed my skills in various programming languages and frameworks, including the **React Js, Next Js, Node Js, Graphql, Typescript**, and many more. I look forward to sharing my expertise with you and working together to bring your innovative ideas to life!

Freelance Ruby on Rails Developer - Rodrigo Droguett
Freelance Ruby on Rails Developer

I'm a chilean developer with years of experience in web technologies.

Freelance Ruby on Rails Developer - Jon Chui
Freelance Ruby on Rails Developer

I'm Jon and I love mentoring junior engineers! For 10+ years I lived & breathed 📱mobile.. worked on top 10 App Store apps (Google Maps, Gmail, Google search) as well as a bunch that didn't see the light of day. The pressure took it's toll finally & I followed the "burnout track" and took 6 month sabbatical (that would later turn into almost 3 years). My family & I left the bay with 8 suitcases of all our belongings, and i thought tech would only be in my rear view mirror... I exchanged the standup desks & nap pods of silicon valley to serve families in the slums of Philippines & Cambodia. To my utter surprise and delight though, these families were happier than I was. Something was missing? We came back to the mainland & I tried my hand at using tech for good, by working on the "strava for sobriety" app and it was amazing. I was finally helping ppl again! But as w/ many startups, funding fell through... I then went to help a big, well-funded startup who's goal was "tech for good", specifically in non-profit church space. I was so excited! And somehow, in the midst of "strat sums" and super fun budgets I lost my way... I actually kind of lost heart.

Freelance Ruby on Rails Developer - Owais Jamil
Freelance Ruby on Rails Developer

Hey there! I'm Owais Jamil and I’m a software engineer with roots in New England and Austin, TX. Right now I’m enrolled as a master’s candidate at the University of Texas, most recently worked as a senior backend engineer at Edlink. I have experience working on mobile and web apps, and have tutored and taught others in the past.

Freelance Ruby on Rails Developer - Mikhail Pospelov
Freelance Ruby on Rails Developer5.0 (26 reviews)

An accomplished and high-motivated IT professional with 6+ years experience of IT leadership involved in web development, application development and System & Solution Architecture. My main competency is in building rich client-side applications, on both sides back-end and front-end. I strongly believe in TDD as the only way to build a bullet-proof code that makes everyone happy and it allows me to rest at night. Reaching 100% test coverage is my passion. **SKILLS:** ✅ Specialities: Computer Engineering, Software Engineer, Web Development, Mobile development, Open Source ✅ Languages:Ruby(6 years), Javascript(4 years), Nodejs(1 year), Elixir(1 year) ✅ Backend Frameworks: Ruby On Rails(6 years), Phoenix(1 year) ✅ Frontend Frameworks: AngularJS(4 years), ReactJS(2 years) ✅ Relational database:Postgresql(6 years), MySQL(6 years) ✅ NoSql databases:Elasticsearch(4 years), Redis(3 years), MongoDB(3 years) ✅ Other technologies:​Rabbitmq, Redux, Universal rendering, HTML, CSS, SCSS, BEM, Docker, AWS, Google Cloud Platform, Webpack, Git, Progressive web apps **LINKS:** https://github.com/mpospelov https://stackoverflow.com/users/2460416/mpospelov https://codementor.io/mpospelov https://www.upwork.com/o/profiles/users/_~0182077648cc549f21/ https://www.toptal.com/resume/mikhail-pospelov

Freelance Ruby on Rails Developer - Nick ottrt
Freelance Ruby on Rails Developer5.0 (20 reviews)

Senior software engineer with 5+ years of experience in backend web technologies including Ruby on Rails, Python, Go, and MySQL. Currently at Tesla, previously EasyPost. Bachelor's in Computer Science. Main strengths include architecting applications and backend API development, have also worked in fullstack roles. The best part of software engineering is that you never stop learning new things.

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Frequently asked questions

How long do Ruby on Rails projects normally take?

The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance Ruby on Rails project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance Ruby on Rails request on Codementor, check out our article.

How much does it cost to hire a freelance Ruby on Rails developer?

We don’t charge anything when you post a freelance hiring request for Ruby on Rails developers! You’ll have the chance to determine what the budget for your project is when you post the request. You’ll only need to pay the developer if you’re 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.

What makes Codementor Ruby on Rails developers different?

We do a comprehensive technical and communications screen of all Ruby on Rails developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing Ruby on Rails developers’ user satisfaction rates.

What happens if I’m not happy with the freelancer’s work?

As a platform, we strive to ensure you’re always happy with your Ruby on Rails project’s results. If you’re unsatisfied with the results, you can choose to get a refund for the project. Additionally, you can contact our support team should you need any further assistance with your project.

For more answers to frequently asked questions, see here.

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