You will get Full Stack Developer React Node | Web Apps & Real-Time Systems
Rising Talent
Rising Talent
Project details
As a full stack developer React Node, I deliver high-performance web applications and real-time systems. Specializing in React Next.js Supabase architectures, I build scalable platforms that grow with your business.
I combine React Node backend expertise with modern frontend optimization. Whether scaling a startup MVP or rebuilding legacy systems, my approach ensures clean code, fast delivery, and zero technical debt.
Core Services:
React Next.js Supabase implementations with real-time sync
Full stack developer solutions: frontend + backend + database
MERN stack architecture for scalability
API design (REST, GraphQL) and integrations
Authentication, payments, and security
Performance optimization and DevOps
Experience with: Laravel Vue and Ruby on Rails migrations when modernizing existing systems.
Perfect for: SaaS platforms, MVPs, marketplaces, dashboards, internal tools, and real-time applications.
Tech Stack: React Node, React Next.js Supabase, PostgreSQL, TypeScript, Stripe
I combine React Node backend expertise with modern frontend optimization. Whether scaling a startup MVP or rebuilding legacy systems, my approach ensures clean code, fast delivery, and zero technical debt.
Core Services:
React Next.js Supabase implementations with real-time sync
Full stack developer solutions: frontend + backend + database
MERN stack architecture for scalability
API design (REST, GraphQL) and integrations
Authentication, payments, and security
Performance optimization and DevOps
Experience with: Laravel Vue and Ruby on Rails migrations when modernizing existing systems.
Perfect for: SaaS platforms, MVPs, marketplaces, dashboards, internal tools, and real-time applications.
Tech Stack: React Node, React Next.js Supabase, PostgreSQL, TypeScript, Stripe
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Localization, Performance OptimizationWhat's included
| Service Tiers |
Starter
$50
|
Standard
$1,000
|
Advanced
$5,000
|
|---|---|---|---|
| Delivery Time | 1 day | 10 days | 20 days |
Number of Revisions | 0 | 0 | 0 |
Number of Pages | 0 | 1 | 5 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | |
Source Code | - |
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Oleksandra R.
May 3, 2026
React Native | Mobile App | Support & Maintenance
Ishtvan is a Clear communicator and consistently Solution-oriented in React Native mobile app support and maintenance.
Komiko Software Agency is professional and Collaborative, works well with the team, and are fully Accountable for outcomes.
They are Committed to quality, highly Reliable, and very Detail-oriented when handling updates, bug fixes, and improvements.
Komiko Software Agency is professional and Collaborative, works well with the team, and are fully Accountable for outcomes.
They are Committed to quality, highly Reliable, and very Detail-oriented when handling updates, bug fixes, and improvements.
YL
Yulia L.
Apr 23, 2026
JavaScript developer needed for web app development and cloud migration
Ishtvan K. is a Clear communicator and consistently Solution-oriented JavaScript developer who handled our web app development and cloud migration.
They are Professional and Collaborative, work great with the team, and are clearly Accountable for outcomes, owning their tasks from start to finish.
They are Committed to quality, highly Reliable, and very Detail-oriented in both implementation and testing.
Definitely can recommend Komiko Software Agency.
They are Professional and Collaborative, work great with the team, and are clearly Accountable for outcomes, owning their tasks from start to finish.
They are Committed to quality, highly Reliable, and very Detail-oriented in both implementation and testing.
Definitely can recommend Komiko Software Agency.
OR
Oleksandra R.
Apr 14, 2026
Technical Assistant — Mobile Development (React Native / Expo) 🔧📱
Ishtvan K. is a Clear communicator who keeps the team aligned and informed.
They are consistently Solution-oriented and Professional in every interaction.
Working with Komiko Software Agency feels truly Collaborative, and they are clearly Accountable for outcomes, owning tasks end-to-end.
They are Committed to quality, highly Reliable, and very Detail-oriented in React Native / Expo mobile development work.
They are consistently Solution-oriented and Professional in every interaction.
Working with Komiko Software Agency feels truly Collaborative, and they are clearly Accountable for outcomes, owning tasks end-to-end.
They are Committed to quality, highly Reliable, and very Detail-oriented in React Native / Expo mobile development work.
YL
Yulia L.
Apr 6, 2026
Full Stack Developer for Notification Preferences (Mobile & Email)
Ishtvan K. has been a truly Reliable full stack developer on our project for building notification preferences for mobile and email.
They are clearly Committed to Quality, delivering clean, well-structured code and thoroughly tested features.
Their mindset is very Solution-Oriented — instead of just flagging problems, they always propose practical options to move forward.
They are highly Detail-Oriented, carefully thinking through edge cases around subscription states, frequency controls, and per-channel preferences.
Throughout the collaboration, Ishtvan K. stayed Professional in communication and attitude, even when requirements evolved.
They are very Responsive, answering questions quickly and providing regular progress updates.
I found them of Komiko Software extremely Communicative - explaining technical decisions in a way that is easy to understand for non-technical stakeholders.
They are also Proactive - anticipating potential issues in the notification flow and suggesting improvements before they become problems.
Ishtvan K. consistently Meets Deadlines, which helped us keep the overall roadmap on track.
Overall, they are very Easy to Work With, and I would gladly hire them again for future full stack work.
They are clearly Committed to Quality, delivering clean, well-structured code and thoroughly tested features.
Their mindset is very Solution-Oriented — instead of just flagging problems, they always propose practical options to move forward.
They are highly Detail-Oriented, carefully thinking through edge cases around subscription states, frequency controls, and per-channel preferences.
Throughout the collaboration, Ishtvan K. stayed Professional in communication and attitude, even when requirements evolved.
They are very Responsive, answering questions quickly and providing regular progress updates.
I found them of Komiko Software extremely Communicative - explaining technical decisions in a way that is easy to understand for non-technical stakeholders.
They are also Proactive - anticipating potential issues in the notification flow and suggesting improvements before they become problems.
Ishtvan K. consistently Meets Deadlines, which helped us keep the overall roadmap on track.
Overall, they are very Easy to Work With, and I would gladly hire them again for future full stack work.
YL
Yulia L.
Feb 2, 2026
Full Stack Developer React Node | React Next.js Supabase | React Node
Ishtvan & commonsaltx team is a professional and reliable tech partner, as always
About Ishtvan
React Developer | Full Stack Developer React Node | Frontend React |PM
100%
Job Success
Lviv, Ukraine - 9:57 pm local time
🏆 8+ years hands-on engineering 🏆 $1M+ in delivered project value 🏆 47+ products shipped 🏆 React Node & Next.js core
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ABOUT ME
✔ React Developer - 8+ years of hands-on engineering, most of it built before I ever touched Upwork, across agency work and independent contracts on other platforms.
✔ Full Stack Developer React Node - $1M+ in combined project value across SaaS platforms, internal tools, and client MVPs.
✔ Frontend React specialist - part of 45+ shipped products, from early prototypes to systems still running in production today.
✔ React Developer and Full Stack Developer React Node - co-founder and CTO of Komiko, a senior team where clients work with the best engineers
✔ Frontend React - trained as a ux designer first, so a wireframe exists before a single component does, on every Full Stack Developer React Node engagement.
✔ React Developer - comfortable as a web developer patching a wordpress site, a react native developer shipping the mobile companion, or a python developer wiring the data pipeline.
✔ Full Stack Developer React Node - when a project needs stripe billing or backend muscle, that's still me, not a handoff.
✔ Frontend React - UI across 20+ of those shipped products is what clients see and judge first.
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WHERE I DELIVER
✔ As a React Developer - I built a subscription analytics dashboard that turned a spreadsheet reporting process into a live self-serve view the whole team could trust.
✔ As a Full Stack Developer React Node - I took a booking platform from a single script to a real mern stack build handling scheduling, payments, and reminders.
✔ As a Frontend React developer - I replaced an aging jQuery admin panel with a component library two other engineers picked up without a single handoff call.
✔ As a React Developer - I moved a slow storefront a previous wordpress developer built over to React, retiring a small vue widget and an old angular dashboard in the same sprint.
✔ As a Full Stack Developer React Node - I paired front end developer react components with a Node API for a healthcare intake flow, HIPAA-style handling built in from the first wireframe.
✔ As a Frontend React specialist - I rebuilt a real estate search tool's map filtering after the client's old webflow prototype couldn't keep up with demand.
✔ As a React Developer - I've supported a mobile app developer porting shared React Native components so a web product and its companion app never drift apart.
✔ As a Full Stack Developer React Node - I've untangled legacy laravel vue and ruby on rails backends and brought them forward without a client-facing outage.
✔ As a React Developer with a strong Frontend React focus - I mentor two junior engineers and review every pull request before it reaches a client's codebase.
✔ As a Frontend React developer - I cut a client's load time in half by trimming an old jQuery-and-Webflow hybrid down to a single clean React bundle.
✔ As a Full Stack Developer React Node - I turned a founder's spreadsheet workflow into a real mern stack tool their ops team now runs on daily.
✔ As a React Developer - I've reviewed Angular and Vue codebases for clients deciding whether a full React rebuild was worth the investment.
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TECH STACK
Frontend: React, Next.js, TypeScript, JavaScript, Tailwind CSS - Frontend React work that loads fast and holds up under real traffic.
Backend: Node.js, Express, GraphQL, REST APIs - the Full Stack Developer React Node backend logic that keeps the frontend honest, plus python for data pipelines and automation.
Database & Cloud: PostgreSQL, MongoDB, Firebase, AWS, Vercel, Docker.
Beyond the core Frontend React stack, also comfortable in angular, vue, laravel vue, and ruby on rails for legacy systems, plus wordpress, webflow, and stripe.
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HOW I WORK
Before writing code I sit down as a ux designer and sketch the user's actual path through the product - this is what keeps a Full Stack Developer React Node from unwinding bad decisions three weeks in. Scope is fixed up front, with no invoice surprise waiting at the end.
Working with a senior team means the react developer, the Frontend React work, and the full stack developer on your project run through me or Komiko's other co-founder. Need a react native developer, a mobile app developer, an app developer, or a software developer instead? Just text us.
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READY TO BUILD?
Message me with what your product needs to do, who it's for, and your timeline. I'll tell you honestly whether a Frontend React rebuild, a Full Stack Developer React Node build, or something smaller fits - as a React Developer who has to own the answer, not just sell it.
👉 Click "Invite to Job" and let's talk.
22.07.2026
Steps for completing your project
After purchasing the project, send requirements so Ishtvan can start the project.
Delivery time starts when Ishtvan receives requirements from you.
Ishtvan works on your project following the steps below.
Revisions may occur after the delivery date.
Development