Hire senior freelance Ruby on Rails developers

I am a software engineer with ten years of professional experience. I have a proven record of writing clean and maintainable code, delivering on company objectives in a timely manner, and providing effective code reviews, high-quality communication, and mentorship to team members and direct reports. My expertise lies primarily in backend API development in Python and Ruby. I am also experienced in frontend development and infrastructure management in AWS. Wherever I find myself in the stack, I always focus on delivering secure, performant solutions.

I started writing apps at 8 years old in Microsoft Access with my Dad. Then 3d games in BASIC, and finally in college PHP and MySQL web apps. Never looked back. Mid-Level/Senior Software Engineer capable of independently developing and assisting in the design of products loved by customers and associates, with many years of experience with full-stack technologies in a cloud environment, and back end technologies such as Java and C#. Great attention to detail with well-architected systems and enjoyable user interactions. Strong communicator with interpersonal savvy.

With more than 10 years of experience in Ruby and Ruby on Rails, I have a track record of delivering high-quality solutions that meet both functional and design requirements. Throughout my career, I have collaborated closely with product managers and UI/UX designers to scope, design, and implement complex projects. I have also worked with both back end and front end technologies, including React with TypeScript. In addition, I have some experience with a variety of other programming languages, including Go, Elixir, C++, Haskell, Python, and Java, as well as developing my own toy programming languages and DSLs. As a passionate learner, I am always looking for opportunities to work with like-minded people and build the best software possible. During my PhD, I worked on the open-source project Bohrium, which allows for automatic parallelization of NumPy and Ruby code written in C++. Additionally, my implementation of a CSP framework for Ruby benchmarked better than the Python implementation at the time. I am comfortable working remotely and believe that effective communication is key to successful collaboration. When I am not at my computer, I enjoy geocaching, playing board games, and cooking. Jokingly, I have made stickers for my own jam brand. I am committed to becoming the best version of myself and would welcome the opportunity to bring my skills and enthusiasm to your team.

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.

I’m a senior full-stack developer with over a decade of Ruby on Rails experience, having started with it back in 2012. I was immediately hooked by how quickly I could bring greenfield ideas to life using Rails, and despite experimenting with other stacks—like Go, TypeScript, and even Salesforce—I always find myself returning to Rails for its elegance, productivity, and ecosystem. What makes me unique is a strong focus on code maintainability and developer empathy. I’m deeply influenced by the SOLID principles and aspire to write clear, change-friendly code, taking inspiration from people like Sandi Metz. In recent roles, I’ve often been the person brought in to refactor legacy codebases, introduce design systems, and reduce complexity—turning code that others fear into something a team can iterate on confidently. I’ve worked remotely for companies across the US, Australia, and New Zealand, collaborating across time zones to ship features, reduce tech debt, and keep product momentum strong. I'm passionate about building tools that people enjoy using, and I leverage AI tools to improve my speed and consistency, giving me more bandwidth for creative problem-solving and mentoring.

I’m a software engineer with strong expertise in Ruby on Rails, having built multiple applications from the ground up and contributed to early-stage projects that are live and actively used. I worked at Intercom, where I contributed to AI-driven customer support features and helped improve production reliability in a high-scale SaaS environment. My experience spans full product development cycles, including deployment, production issue resolution, and close collaboration with designers and front-end developers to deliver seamless user experiences. I’ve worked on a play-to-earn football management game, developing tracking and daily reward systems, and am currently building a SaaS product with integrated payment functionality. I am familiar with deployment using Heroku. For project management, I'm most familiar with Linear, but I've also used other apps like Trello and Basecamp. Here are some of the technologies that I'm familiar with: - Ruby on Rails - HTML/CSS/Javascript - TailwindCSS - Hotwire (Stimulus & Turbo) - Haml - PostgreSQL - Redis - Sidekiq - Git - Heroku - RSpec/Minitest and Capybara - Bootstrap I have a strong passion for emerging technologies. I am a fast learner and love learning new things. So if your stack is slightly different to what I'm familiar with, it's not a problem as I can pick it up quickly. P.S. Check out my website to find out more about me.

Senior Full Stack Developer with 10+ years of experience delivering scalable, performant solutions across global enterprise and e-commerce platforms. I've led engineering efforts that directly improved business outcomes—cutting page load time by 96% for NinetyPercent.com, boosting form submission rates by 275% at Owens Corning, and reducing security vulnerabilities by 19.3% through large-scale refactoring. At Owens Corning via Toptal, I introduced a reusable geolocation service adopted by 9 datasets and built a multilingual translation engine that improved LATAM and Canadian outreach. My contributions consistently reduce costs, enhance UX, and modernize legacy systems with measurable results. Skilled in Ruby on Rails, React, Symfony, Postgres, Docker, Redis, and CI/CD pipelines, I thrive in remote, agile environments, leading teams with a balance of technical depth and collaborative mentorship.

Senior Software Developer with 10+ years of experience delivering robust full-stack software solutions. Extensive experience developing with Ruby, (Ruby on Rails, Sinatra), Python (Django, Flask, FastAPI), and Javascript. Proven track record architecting cloud-native applications, optimizing CI/CD pipelines, and orchestrating infrastructure. Deep understanding of testing software and continuous delivery systems. Adept at leading Agile teams and modernizing legacy systems to drive scalability, performance, and speed to market.

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Full Stack Software Engineer with over a decade of hands-on experience in full-stack development, specializing in Ruby on Rails. Proficient in managing end-to-end software solutions from backend to frontend and mobile applications, with a strong focus on scalable distributed systems including serverless architectures (AWS Lambda). As a Full Stack and Tech Lead at current small company Brightree, I work on different languages programming and tech stacks. My In-progress demos: https://github.com/nctruong/glassdoor Ruby on Rails GraphQL Elasticsearch NextJS https://github.com/nctruong/shopee NodeJS Kubernetes Microservices https://github.com/nctruong/smartnote NestJS & NextJS