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Fiverr Pro
English
$
USD
I will build a custom CRM, admin dashboard and web app
Sergei Sidorov
About this gig
Need a custom CRM, admin dashboard or internal web app that fits your business - not a template you have to fight?
I'm a senior full-stack developer with 10+ years of experience, including 5 years leading development at one of the largest banks. I build clean, scalable web apps on React/Next.js, Node.js and PostgreSQL.
What I can build: custom CRMs and admin panels (leads, orders, clients, workflows); dashboards, reports and analytics; client portals and internal tools; role-based access, authentication and integrations with your APIs and payments.
How I work: I start with your goal, not the code, and suggest the simplest way to get there. You get working demos along the way, clean and documented code you can grow later, a clear scope and a fixed price with no surprises.
Tell me about your project and I'll reply with an honest estimate and a plan.
Get to know Sergei Sidorov
Sergei Sidorov
Fullstack Architect
- FromSwitzerland
- Member sinceApr 2026
- Avg. response time1 hour
Languages
Russian, English
Senior full-stack developer with 10+ years of experience building SaaS products, high-load web apps, and complex frontend systems.
Core stack: React, Next.js, Node.js, PostgreSQL, MongoDB, AI (LLM integrations).
I help clients build scalable products from MVP to production, design system architecture, and integrate AI features.
I focus not just on code, but on business value and long-term solutions.
Let’s build something that actually works and grows.
My Portfolio
FAQ
Do you use templates or build from scratch?
Custom build on React/Next.js, Node.js and PostgreSQL, tailored to your workflows - no templates you have to fight. You get clean source code and full ownership.
Can you build on top of my existing app or database?
Yes. I can extend an existing React/Node app, integrate with your current database and APIs, or rebuild from scratch - whatever fits your case best.
Do you provide hosting and deployment?
Yes. I deploy your app to production on your VPS or cloud. Full server setup (domain, SSL, process manager) is available as the Deploy & hosting extra.
Can you migrate my data from spreadsheets or another system?
Yes. Import from Excel/Google Sheets or an existing CRM can be scoped into your package - message me with details and I'll include it in the plan.
What if my project doesn't fit a package?
Message me with a short description of what you need and I'll reply with an honest estimate and a custom offer, usually within a few hours.
