Hire mid-level freelance Ruby on Rails developers

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.

I’m a full-stack Ruby on Rails developer with 3+ years of real-world experience building and maintaining production software in a small, fast-moving team. Before becoming a developer, I trained and worked professionally as a classical guitarist—an experience that taught me patience, precision, and a commitment to lifelong learning. I now bring those same qualities to building clean, maintainable, and thoughtful software. My path into programming was driven by a passion for analytical thinking, which led me to study Mathematical Technical Software Development part-time. During my studies, I joined a small remote-first company, where I quickly moved from working student to full team contributor. There, I shipped features across the stack—writing tests, squashing bugs, and taking ownership of projects from planning to deployment. My day-to-day tools include Ruby on Rails, Hotwire, RSpec, PostgreSQL, Redis, Docker, and Vue.js. I enjoy diving into the internals of systems, not just getting things to work, but understanding why they work. I’m also active in open-source and maintain two Neovim plugins focused on improving Rails workflows. Currently, I’m building BudgetBuddy, a personal finance tool that puts my full-stack skills to the test. Whether collaborating in a team or building on my own, I value clear communication, craftsmanship, and continuous improvement.

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 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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I majored in mathematics at Penn State, where I worked on simulation and data modeling projects. I found myself drawn more to the coding side than the math itself, and after graduation I pivoted into software development with the goal of building tools that people actually use and rely on. I now work at Alpha Omega Integration on a USCIS project where we’re digitizing the asylum and refugee process. I’ve led a refactor that made our Rails architecture form-agnostic, which prevented a costly split into multiple systems. I also migrated our test suite to Playwright, cutting runtime by over 75 percent and helping us ship with more confidence. Rails has clicked for me because it encourages clean, readable code and rewards long-term thinking. I care about building systems that are easier to reason about, easier to maintain, and easier for others to step into. Whether through thoughtful refactors, clear conventions, or active collaboration, I try to make code better for everyone who works with it.

I'm a passionate and results-driven Ruby on Rails developer with over 2 years and 5 months of experience in building and maintaining scalable web applications. I specialize in backend development with a strong grasp of RESTful API design, ActiveRecord, PostgreSQL/MySQL, and RSpec testing.

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