You will get Estimate for MVP/SaaS project Node.js | React | Express | AI integration
Top Rated
Project details
PLEASE DO NOT ORDER BEFORE HAVING A DISCUSSION.
With us YOU will get a professional technical estimate directly from an experienced CTO and his engineering team. We specialize in full-stack development using React, Node.js, TypeScript, PHP, Python, and AWS, helping startups and enterprises turn complex ideas into reliable, scalable products.
You’ll receive a detailed project evaluation based on real engineering logic, not guesses. We’ll break down your scope, highlight technical risks, propose architecture options, and give you realistic delivery timelines and cost estimates.
Our clients appreciate our clarity, speed, and high-quality execution. Expect productive collaboration, transparent communication, and a team that treats your product like their own.
Whether you’re building a SaaS platform, MVP, marketplace, or enterprise solution, we’ll help you plan it right from day one.
Thanks,
Sergey Koval
CTO at Rezet team
With us YOU will get a professional technical estimate directly from an experienced CTO and his engineering team. We specialize in full-stack development using React, Node.js, TypeScript, PHP, Python, and AWS, helping startups and enterprises turn complex ideas into reliable, scalable products.
You’ll receive a detailed project evaluation based on real engineering logic, not guesses. We’ll break down your scope, highlight technical risks, propose architecture options, and give you realistic delivery timelines and cost estimates.
Our clients appreciate our clarity, speed, and high-quality execution. Expect productive collaboration, transparent communication, and a team that treats your product like their own.
Whether you’re building a SaaS platform, MVP, marketplace, or enterprise solution, we’ll help you plan it right from day one.
Thanks,
Sergey Koval
CTO at Rezet team
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Security, DesignWhat's included
| Service Tiers |
Starter
$500
|
Standard
$750
|
Advanced
$1,000
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 5 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 2 | 3 | 5 |
Design Customization | |||
Content Upload | - | - | - |
Responsive Design | - | ||
Source Code |
23 reviews
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SD
Shelomo D.
Oct 25, 2024
Full Stack Developer
Working with Sergey has been a great experience. His commitment and professional attitude ensure that every project is done well and on time. Sergey consistently provides clear and organized ideas, which improve our teamwork and lead to excellent outcomes. His skill in aligning with our goals makes him an essential partner. I highly recommend Sergey and can't wait to collaborate with him again.
SD
Shelomo D.
Jan 11, 2023
Fullstack Developer
Sergey has shown excellent technical skills and a solid understanding of software development principles. Their coding is clean and well-organized, with a focus on maintainability and scalability. He works well in a team, and are able to effectively communicate and collaborate with other team members. He has also shown a strong ability to learn new technologies and adapt to changing requirements.
YB
Yonatan B.
May 31, 2021
Full Stack | React & Node.js
Sergey is an absolute asset. Dedicated, communicative and highly professional developer. It was a pleasure working with him for so long. We hope to extend our work in future projects. We highly recommend Sergey as a full stack developer.
YB
Yonatan B.
Nov 30, 2020
Full Stack Needed | React & Node.js
Sergey has proved himself to be one of the best developers we ever worked with. Communication is great, execution is stellar and the quality of work is amazing. Would highly recommend hiring him for complex projects. Looking forward to our next project!
RS
Ruslan S.
Nov 2, 2020
Senior JavaScript Developer
Sergey is a responsible and professional developer who moved us to the next level in terms of code quality and architecture, thank you!
About Serhii
Senior AI Full-StackDeveloper | Next.js, Node.js | SaaS, AI agents
100%
Job Success
Zaporizhzhya, Ukraine - 11:33 am local time
With 12+ years of engineering and 100+ delivered projects, I build robust Next.js and NestJS systems that don't break under heavy traffic.
Whether you need a rock-solid Next.js frontend, a NestJS modular backend, or secure Stripe subscription billing logic, I build systems that perform from day one. No fluff, no endless project management layers - just direct engineering execution.
What I build & scale:
Full Stack SaaS apps: React, Next.js, Node.js, and TypeScript architectures.
AI & RAG pipelines: custom AI agents, LangChain integrations, smart model routing, and vector databases.
Payment orchestration: Stripe subscriptions, multi-provider routing, idempotency, and webhook handling under load.
Backend performance: PostgreSQL, MySQL, AWS, and Redis caching layers with strict security boundaries.
📊 Proven track record:
AI-powered CRM & SaaS: Shipped a custom React app in 6 weeks, handling 500K+ enterprise documents inside an optimized pgvector/langChain pipeline while cutting infrastructure costs by 40%.
B2B E-commerce & FinTech: executed seamless payment migrations and built Stripe graduated pricing subscription architectures with 0% transaction failure rates.
100+ Successful Deliveries: backed by 12+ years of hands-on engineering experience and a 100% success mindset.
Let's build your scalable MVP or perform a thorough security and performance pass.
Send a message or hit Invite to schedule a quick introduction chat today.
Steps for completing your project
After purchasing the project, send requirements so Serhii can start the project.
Delivery time starts when Serhii receives requirements from you.
Serhii works on your project following the steps below.
Revisions may occur after the delivery date.
You complete the project following the steps.
We will analyze your details, specification, business logic and prepare a detailed estimate according to your needs. You can also expect for 1 round of revision to fine-tune the final result.