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I'm a full-stack Rails developer with a focused, thoughtful approach and a strong interest in clean, maintainable code. Before I got into programming, I studied classical guitar — and that training still shapes how I work: with patience, care, and an eye for detail. I enjoy understanding systems deeply and building software that’s simple, useful, and built to last.

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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.

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Building your next great thing with 12+ years of Ruby on Rails experience

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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.

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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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I help founders to boost customer retention by reducing the number of bugs that make it through to customers

Hello! Here's how I helped a client: Brendon requested help with developing new features for his SaaS, that helps schools build their websites Solution When I started working on the project, I realised that there was no acceptance test suite. I could easily break parts of the SaaS, while adding features, so I proposed adding acceptance tests first. Brendon agreed with that. I used RSpec to cover the app with an acceptance test suite (Ruby on Rails feature tests), and introduced a CI to run the test suite on pushed Github code. Outcome Brendon got a safety net of a test suite and CI. That allowed to: * Catch introduced bugs, before they reached customers. * Gave Brendon a sense of safety, while making changes to his SaaS. Testimonial Before working with Dmitry, our application had no test suite due to time constraints. I always knew we needed tests, but Dmitry helped put things into action. He created a set of unit and integration tests that mean we can now make code changes with confidence. I found Dmitry's critical thinking helpful. An example of this was his encouraging us to use Continuous Integration (CI). Now our tests run automatically each time we push any changes to Github. I definitely recommend Dmitry’s Technical Debt Rescue service for anyone looking to reduce development time by prioritising testing and/or refactoring. Dmitry is a very careful coder and I could definitely trust in his work. Brendon Miur Founder at Spike@school What it's like to work with me: - I work autonomously and isolate you from most problems I encounter during work. You convey the outcomes you want, and I work on delivering them for you. As a result, if your management style leans toward micro, we probably aren't a good fit. - I need descriptions of the outcomes you want (for example, via Kanban tickets), and resources necessary for me delivering those outcomes (git repo access, documentation, etc). - If I see an inefficiency cropping up, I create a system to mitigate it. For example, users were reporting the same type of bug over and over, taking the team's valuable time to address each report. I suggested implementing a bug reporting template written with these reports in mind. The template ensured the users were giving us the information we needed to make the report immediately actionable. In many cases, it actually prevented the reports in the first place since it revealed to the user what they were doing wrong. What my clients say: Dmitry's services are excellent. Dmitry helped us refactor our application and his knowledge of Ruby and Rails architecture is excellent. I highly recommend Dmitry to any project or business that is finding their development efforts slow or hard due to a large amount of technical debt. His approach is deliberate and informative, and all members of the team will benefit from his thorough explanations and guidance. Rob Zolkos CTO/Senior Ruby on Rails developer 💎 Back end: Ruby on Rails, RSpec, Sidekick, PostgreSQL,MySQL 🌨️ DevOps: shellscript (bash), Docker, Linux, Gitlab CI, AWS EC2/S3/CloudWatch, Terraform, Python 🖥 Front end (auxiliary): HTML5, CSS, Sass, JavaScript ES6, Vue (I can make changes to Vue frontend, but I won't take full responsibility for it.), jQuery, Mocha

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I'm a full-stack software engineer with more than six years of professional experience developing web and mobile applications for small and large-scale businesses through effective global remote collaborations.

My latest work experience is at one of the largest online food delivery platforms, where I worked on backend systems that millions of customers use daily. Here are some of my recent achievements: Help reduce the waiting time of couriers at the pick-up stores by more than 15 minutes, develop geofencing controlled pick-up, business order notifications, and 3D secure verification bypass into the order processing workflow on MRSOOL. Improve the quality of courier service and help generate monthly recurring revenue by developing a penalty module that charges couriers a fee for challenges they brought about, for example, delayed delivery, wrong orders, missed items, etc. Refactor a large codebase using best practices and modern techniques to improve the response time on APIs by up to 22 seconds. 💼 I look forward to joining a highly collaborative, multicultural, and fast-paced environment that fosters growth and feedback and where egos don't have a place in the workplace. ⚽ I am an ardent supporter of Arsenal and the English Premier League, and you will usually find me on the weekend catching football games. 🛠️ Ruby on Rails | Ruby | RSpec | Sidekiq | Node | Express | MySQL | PostgreSQL | HTML | CSS | React | REST | Third party API Integration | Docker | GIT | GitHub | Asynchronous work | Written communication | Cross-cultural Collaboration | Virtual Collaboration Please send me an email 📬: yusif.badmus@gmail.com Schedule a one-on-one meeting: https://calendly.com/ybadmus

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