Jacky V.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I’m a senior full-stack Ruby on Rails engineer with 15+ years of experience building, improving, and maintaining web applications across SaaS, healthcare, real estate, e-commerce, and automation. I help businesses turn product requirements into reliable software. My work includes backend and API development, database design, third-party integrations, production troubleshooting, performance improvements, and user-friendly interfaces. I write clean, maintainable, well-tested code with security and scalability in mind. I’ve also led engineering work and collaborated with distributed teams, so I’m comfortable taking ownership of a feature or working closely with your existing team. How I can help: - Build and maintain Ruby on Rails applications - Design APIs and integrate third-party services - Improve application performance and troubleshoot production issues - Develop full-stack features with React or Angular - Write automated tests with RSpec or Minitest - Support cloud deployments and DevOps workflows - Build Shopify apps and data collection tools Core skills Ruby, Ruby on Rails, PostgreSQL, Redis, MongoDB, React, Angular, JavaScript, HTML, CSS, RSpec, Minitest, AWS, DigitalOcean, Docker, Git, API development, Shopify apps, and web scraping. If you need an experienced engineer who can take ownership, communicate clearly, and deliver dependable work, let’s discuss your project.