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$
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I will develop a custom telegram bot or mini app
Sergei Sidorov
About this gig
Need a custom Telegram bot or Mini App that actually does the job? I build reliable bots and Mini Apps on Node.js, from a simple assistant to a full product inside Telegram.
I'm a senior full-stack developer with 10+ years of experience, including 5 years leading development at one of the largest banks. I run my own products on this stack, so you get proven patterns, not experiments.
What I can build: bots with commands, menus and notifications; order handling and payments; CRM and API integrations; Telegram Mini Apps with a real backend; AI/GPT features and smart replies; admin panels and analytics.
How I work: I start with your goal, ship a working demo fast, then move to full build and deployment. Clean, documented code, clear scope and fixed pricing.
Tell me what your bot should do and I'll reply with an honest estimate and a plan.
Get to know Sergei Sidorov
Sergei Sidorov
Fullstack Architect
- FromSwitzerland
- Member sinceApr 2026
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 I need anything before ordering?
Just a clear idea of what the bot should do. I can register the bot with BotFather for you, or use your existing bot token. Message me first and I'll help you scope it.
Do you provide hosting and deployment?
Yes. I deploy your bot or Mini App to production on your VPS or cloud. Full server setup (domain, SSL, process manager) is available as the Deploy & hosting extra.
Will I get the source code?
Yes. Every package includes clean, documented source code with full ownership. You can host it anywhere and any developer can continue the work.
Can you add AI features to my bot?
Yes - AI/LLM integration (GPT, Gemini, DeepSeek) is included in every package: smart replies, AI assistants and automation. Answers based on your own data (RAG) are included in Premium.
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.
