You will get Web & Mobile Application Development, Start to Finish
Top Rated
Top Rated
Project details
I build and scale web and mobile products from MVP to production, with experience across SaaS, FinTech, HealthTech, LegalTech, EdTech, and E-commerce. I’ve worked on platforms used by 800K+ users, improved dashboard performance by 2–3x, and helped reduce maintenance costs by 20–25%.
Using React, Next.js, React Native, Node.js, TypeScript, and PostgreSQL, I handle the full development cycle from architecture and core features to APIs, integrations, testing, optimization, and deployment.
Whether you need a single feature, a new MVP, or a complete product, I focus on building reliable, scalable software that is ready for real users and business growth.
Using React, Next.js, React Native, Node.js, TypeScript, and PostgreSQL, I handle the full development cycle from architecture and core features to APIs, integrations, testing, optimization, and deployment.
Whether you need a single feature, a new MVP, or a complete product, I focus on building reliable, scalable software that is ready for real users and business growth.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$400
|
Standard
$2,500
|
Advanced
$5,000
|
|---|---|---|---|
| Delivery Time | 5 days | 20 days | 30 days |
Number of Revisions | 2 | 3 | Unlimited |
Design Customization | - | ||
Content Upload | - | - | - |
Responsive Design | |||
Source Code |
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IM
Ildar M.
Aug 24, 2026
Presentation website for a TV channel with AI-generated news and voiceover (ElevenLabs API)
Great developer. The work was completed quickly and professionally. Communication was clear, and the result met all requirements.
KM
Klaudijus M.
Nov 4, 2025
Front-End Developer Needed for React Project Using Vite and Tailwind CSS
KR
Klaus R.
Sep 16, 2025
Software Engineer - Front-End React JS
Working with Ross has been a great experience from start to finish. He demonstrated deep expertise in React JS and modern front-end development practices throughout our project.
His technical skills are top-notch with clean, maintainable code with proper component architecture and state management. The attention to responsive design meant our application looks great across all devices.
The communication was excellent with proactively providing regular updates and asking thoughtful questions to ensure he understood requirements perfectly. Also the alignment with the backend developer was seamless. All milestones were delivered on time and were receptive to feedback, implementing revisions quickly and accurately.
I would absolutely hire Ross again and recommend him without hesitation to anyone looking for a skilled React developer. They're a true professional who delivers quality work and makes the collaboration process smooth and enjoyable.
His technical skills are top-notch with clean, maintainable code with proper component architecture and state management. The attention to responsive design meant our application looks great across all devices.
The communication was excellent with proactively providing regular updates and asking thoughtful questions to ensure he understood requirements perfectly. Also the alignment with the backend developer was seamless. All milestones were delivered on time and were receptive to feedback, implementing revisions quickly and accurately.
I would absolutely hire Ross again and recommend him without hesitation to anyone looking for a skilled React developer. They're a true professional who delivers quality work and makes the collaboration process smooth and enjoyable.
KM
Klaudijus M.
Aug 27, 2025
Front-End Developer Needed for React Project Using Vite and Tailwind CSS
SB
Stanislav B.
Jul 31, 2024
Payment Gateway Functionality Enhancement
About Rostyslav
Full Stack Developer (React/Node/Python) | SaaS, MVP & AI Features
100%
Job Success
Lviv, Ukraine - 1:15 am local time
Got a product that needs to ship, or an existing codebase that has become difficult to maintain? That's where I come in.
I build web and mobile products end to end from architecture and backend APIs to frontend, integrations, deployment, and ongoing improvements. I mainly work with React, Next.js, Node.js, and Python.
Startups hire me to turn ideas into working SaaS MVPs. Established teams bring me in when a product needs new features, better performance, cleaner architecture, or someone who can take ownership of a messy codebase.
I can also add AI where it creates real value, but the priority is always a reliable product that works for the business.
A few numbers from recent projects:
- 𝟏,𝟑𝟎𝟎+ businesses run on an enterprise platform I helped build
- 𝟏𝟎𝐌+ photos processed monthly by a mobile app I worked on
- 𝟖𝟎𝟎𝐊+ users on an AI-powered learning platform
- A LegalTech MVP that used to crash under load, now running as a stable production platform
- A B2B commerce system where order processing went from manual to fully automated
- Products shipped across 𝐅𝐢𝐧𝐓𝐞𝐜𝐡, 𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞, 𝐂𝐑𝐌, 𝐌𝐚𝐫𝐤𝐞𝐭𝐩𝐥𝐚𝐜𝐞, 𝐚𝐧𝐝 𝐄𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐒𝐚𝐚𝐒
A few things past clients keep mentioning:
- I read business context, not just tickets I ask why a feature matters before building it
- I can jump into someone else's codebase without months of hand-holding
- I flag a better technical approach even when nobody asked for one
- I stay involved from planning to the moment it's live, not just the coding part
- AI goes in when it solves a real problem, never just to check a box
𝐅𝐫𝐞𝐞 𝐭𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐜𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐭𝐢𝐨𝐧
𝐒𝐞𝐧𝐝 𝐨𝐯𝐞𝐫 𝐰𝐡𝐚𝐭 𝐲𝐨𝐮'𝐫𝐞 𝐰𝐨𝐫𝐤𝐢𝐧𝐠 𝐨𝐧 𝐚𝐧𝐝 𝐈'𝐥𝐥 𝐭𝐚𝐤𝐞 𝐚 𝐫𝐞𝐚𝐥 𝐥𝐨𝐨𝐤 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞, 𝐫𝐢𝐬𝐤𝐬, 𝐰𝐡𝐚𝐭'𝐬 𝐰𝐨𝐫𝐭𝐡 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐧𝐞𝐱𝐭, 𝐚𝐧𝐝 𝐰𝐡𝐞𝐭𝐡𝐞𝐫 𝐀𝐈 𝐢𝐬 𝐞𝐯𝐞𝐧 𝐫𝐞𝐥𝐞𝐯𝐚𝐧𝐭 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐜𝐚𝐬𝐞.
𝐍𝐨 𝐩𝐫𝐞𝐬𝐬𝐮𝐫𝐞 𝐭𝐨 𝐡𝐢𝐫𝐞 𝐦𝐞 𝐚𝐟𝐭𝐞𝐫𝐰𝐚𝐫𝐝. 𝐘𝐨𝐮'𝐥𝐥 𝐰𝐚𝐥𝐤 𝐚𝐰𝐚𝐲 𝐰𝐢𝐭𝐡 𝐚 𝐜𝐥𝐞𝐚𝐫 𝐧𝐞𝐱𝐭 𝐬𝐭𝐞𝐩 𝐞𝐢𝐭𝐡𝐞𝐫 𝐰𝐚𝐲.
𝐆𝐨𝐭 𝐚𝐧 𝐢𝐝𝐞𝐚, 𝐚 𝐥𝐢𝐯𝐞 𝐩𝐫𝐨𝐝𝐮𝐜𝐭, 𝐨𝐫 𝐚 𝐜𝐨𝐝𝐞𝐛𝐚𝐬𝐞 𝐢𝐧 𝐫𝐨𝐮𝐠𝐡 𝐬𝐡𝐚𝐩𝐞? 𝐌𝐞𝐬𝐬𝐚𝐠𝐞 𝐦𝐞.
Steps for completing your project
After purchasing the project, send requirements so Rostyslav can start the project.
Delivery time starts when Rostyslav receives requirements from you.
Rostyslav works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery
We talk through your product, goals, and current setup.
Technical Review
I dig into the architecture and figure out the right approach.