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You will get FullStack | Web & Apps | React.JS | Ruby on Rails | Angular | NodeJS | Java

Denis Y.Status: Offline
Denis Y. Denis Y.
4.9
Rising Talent
Preview imagePreview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Denis, priced and ready to go.
Denis Y.Status: Offline
Denis Y. Denis Y.
4.9
Rising Talent
Preview imagePreview imagePreview imagePreview image

Let a pro handle the details

Buy Web Application Programming services from Denis, priced and ready to go.

Project details

I am Denis, CEO of Faster Than Light (fasterthanlight.me) and FullStack Web Developer & Software engineer with over seven years of experience. I help you make your perfect website or meet any custom requirements.

Services:-
- React, Angular, Ruby on Rails, Node, Java
- MySQL, PostgreSQL, Oracle, MongoDB, Redis
- Docker
- AWS, Google Cloud Services, Heroku, digital ocean
- REST, SOAP, OAuth
- Travis, Jenkins, CircleCI
- Apache, Nginx
- Rspec, Capybara, Cucumber
- Different integrations: Slack, Stripe, AWS, Intercom, and others.

I am open to any requests. Contact me if you have any ideas and want to make a perfect website/app.
Programming Languages
HTML & CSS, JavaScript, Ruby/Ruby on Rails
Coding Expertise
Performance Optimization, Security, Design
What's included
Service Tiers Starter
$500
Standard
$1,500
Advanced
$4,000
Delivery Time 10 days 20 days 30 days
Number of Revisions
UnlimitedUnlimitedUnlimited
Number of Pages
51025
Design Customization
Content Upload
-
Responsive Design
Source Code
Optional add-ons You can add these on the next page.
Fast Delivery
+$800 - $5,000
4.9
9 reviews
100% Complete
(9)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)

EH

Emily H.
5.00
Mar 26, 2026
Full stack engineer for Project Globe Superb team

CM

Christian M.
5.00
Feb 19, 2026
Chatbot and website developer

AA

Anastasia A.
4.55
Jul 6, 2021
Brexit development work Denis was very professional and polite. Overall, I was satisfied with the general quality of work. One thing that could have been improved is timing estimates. We were suggesting leaving more time for development at the planning stage, but Denis reassured us that this was unnecessary. In the end, we didn't complete the project on time. Nonetheless, we enjoyed working with Denis.

DT

Dima T.
4.85
Jan 21, 2021
Full-stack developer

AA

Anastasia A.
5.00
Aug 5, 2020
Full-stack developer
Denis Y.Status: Offline

About Denis

Denis Y.Status: Offline
React Developer Node.js Full Stack Developer React Native
100% Job Success
4.9  (9 reviews)
Davie, United States - 10:36 pm local time
Hey! I am a CEO, Full Stack Developer, and React Developer with over 12 years of commercial experience. My journey began with deep back-end engineering, but naturally evolved into full-cycle product development - from architecture planning to deployment and support. As a React Developer, I treat every interface as a product decision, not just a visual layer.

What I do

My work as a React Developer covers the full stack - from crafting fast, clean React interfaces to designing AWS infrastructure and API orchestration. With 5,800+ hours logged on Upwork and 100+ projects delivered, I take full ownership. That is what the role of a React Developer means to me: accountability for the entire user-facing layer, not just the components. Thinking like a React Developer means making deliberate decisions at every layer - from component architecture to state management and API design.

My Front-End Development work combines React, JavaScript, TypeScript, HTML, HTML5, CSS, and CSS 3 to create fast, maintainable interfaces where performance and Responsive Design work together.

My technical stack

React Developer experience means mastering the entire frontend layer. I build with React.js, Next.js, TypeScript, JavaScript, HTML, HTML5, CSS, CSS 3, Bootstrap, Tailwind CSS, Astro, Angular, and Vue.js. I also work with Redux for predictable state management.

For mobile, my background as a React Native Developer means I apply the same component-driven discipline across platforms - working with React Native (Expo), Flutter, Swift, and Kotlin. Every stack decision is guided by performance, maintainability, and scalability - values I bring to every project as a React Developer.

My experience also covers Web Design and responsive interfaces, where visual structure, usability, and technical constraints work together. The goal is an intuitive experience backed by reliable implementation.

On the back end, I work with Node.js, Python (FastAPI, Django), Ruby on Rails, Go, and Java. My Software Development experience spans APIs, integrations, business logic, databases, and scalable architecture, including MongoDB.

My cloud infrastructure expertise spans AWS Lambda, S3, and CDK/SST - the foundation a serious React Developer build demands. Bridging frontend precision with back-end reliability is what separates a strong React Developer from someone who only knows one side of the stack. That balance is something every experienced React Developer has to earn and I have.

I also work with PHP and jQuery when modernizing web applications, extending legacy systems, or introducing new Front-End Development workflows.

What I build

Having worked as a React Developer across Fintech, HealthTech, SaaS, AI and Automation, Real Estate, and Event Management, I know what it takes to build products that scale, including HIPAA-compliant data handling, audit logging, and role-based access control.

The range I have delivered as a React Developer includes AI-driven MVPs, C2C marketplaces, PropTech platforms, responsive web products, and complex enterprise systems with high concurrency requirements.

Each engagement starts with the business problem, not the ticket. I think system-wide and stay involved from architecture to deployment. Clean logic, performance optimization, Responsive Design, and secure data handling are standards every React Developer should hold.

React Developer instincts, built over 12 years, mean I can spot performance bottlenecks and architecture risks before they become expensive problems. Whether the challenge is a modern React application, a Vue.js interface, a Node.js backend, or an existing PHP and jQuery codebase, I focus on the product outcome rather than the technology for its own sake.

Why clients hire me

Clients return to me as their React Developer because I bring more than technical skill - I bring the mindset of a CEO who has built and shipped real products. Hiring a React Developer with that perspective means you get someone who understands what it costs when a system breaks, what it takes to scale under pressure, and what users need from a frontend.

My React Developer background spans over a decade of production systems built for real users at real scale. From Front-End Development and Web Design to backend engineering and cloud infrastructure, I stay involved across the product lifecycle.

Finding the right React Developer for a complex product matters. I have helped businesses modernize legacy systems, migrate to AWS, and launch products from zero to production. Whether it is a greenfield SaaS build or a rescue engagement, I bring structure, reliability, and full-stack depth as a React Developer. That combination defines my React Developer practice.

The strongest React Developer stays involved until the product ships and performs. If you are looking for a React Developer who thinks beyond the ticket, I would be glad to connect. Let's build something great.

Steps for completing your project

After purchasing the project, send requirements so Denis can start the project.

Delivery time starts when Denis receives requirements from you.

Denis works on your project following the steps below.

Revisions may occur after the delivery date.

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