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Python / Django / AI

Kirill
Strelnikov

I build AI chatbots, SaaS platforms, and automation tools that grow your revenue. 15+ commercial projects delivered. Based in Barcelona, working worldwide.

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About

Kirill Strelnikov — Python/Django developer

I build products that
solve real business problems

I'm a backend developer specializing in Python and Django. My focus is not technology for technology's sake, but building commercial products that deliver real value — automating routine tasks, increasing sales, and reducing operational costs.

Over the years I've grown from classical backend development to full-cycle product creation — from business requirements analysis to deployment and ongoing support. I work with AI integrations, Telegram bots, payment systems, CRM, and e-commerce solutions.

Every project is first and foremost a business challenge. The tech stack is chosen to fit the specific problem, not the other way around.

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Commercial projects
0
Years of experience
0
Case studies
0
Tech stacks mastered
Time in development

What I do

Types of problems
I solve

01

AI integrations & chatbots

Embedding artificial intelligence into existing business workflows. Chatbots for support and sales, content generation, recommendation engines, OpenAI and other AI service integrations. Telegram bots with paid models and billing.

02

Backend development

Designing and building server-side systems with Python and Django. REST APIs, microservice architecture, task queues, WebSocket, third-party integrations. Clean, testable, scalable code.

03

Business process automation

CRM integrations, automatic triggers and notifications, loyalty systems, cross-platform data synchronization, catalog import/export, Google Shopping and marketplace integrations.

04

SaaS & product development

Building SaaS platforms from scratch: multi-tenant architecture, billing, admin panels, role-based access, reporting. Platforms for e-commerce, real estate, HoReCa, and other industries.

05

CRM setup & customization

CRM configuration, pipeline setup, data import, custom fields, automations, email sequences, and reporting dashboards. Migration from legacy systems.

06

Google Ads setup

Campaign setup, keyword research, ad copy, conversion tracking, remarketing, A/B testing, and ongoing optimization. From initial launch to scaling strategy.

07

Shopify customization

Theme customization, Liquid templates, app integrations, checkout optimization, and custom Shopify app development. Headless Shopify with API integrations.

08

Any customization

Custom integrations between any services, API connections, webhooks, data sync, workflow automation with Zapier/Make, and bespoke solutions for unique business needs.

Selected work

Case studies

01

AI chatbot for an online clothing store

Challenge

An online clothing store was losing customers due to the lack of personalized recommendations and slow response times. Managers couldn't keep up with the volume of inquiries, and browse-to-purchase conversion remained low.

Solution

Built a Django system with an OpenAI-powered chatbot: personalized recommendations based on catalog and conversation history, automatic product description generation, intelligent session handling. The bot replaced first-line support and became a sales tool — no manager required.

Django OpenAI API REST API PostgreSQL Recommendation engine
02

Telegram bot — AI aggregator with monetization

Challenge

Users were juggling dozens of AI services for text, image, and video generation. Each required a separate subscription and interface. A single convenient access point with a clear payment model was needed.

Solution

Created a Telegram bot unifying multiple AI models in one interface. Implemented a credit and billing system, admin panel for managing models and users, and a scalable architecture with task queues. The project reached monetization within the first month.

Python Telegram Bot API OpenAI Celery Redis Billing
03

SaaS time-tracking system for HoReCa

Challenge

A chain of cafes and restaurants tracked employee hours on spreadsheets and paper. Payroll errors, no real-time oversight, and losses from overtime and idle shifts were the norm.

Solution

Built a SaaS platform with shift management, employee roles, automated payroll calculations, and detailed reports. Manager dashboards and employee portals. The system cut operational costs and eliminated calculation errors.

Django PostgreSQL REST API Docker SaaS
04

Real estate platform with automated import

Challenge

A real estate agency published listings manually, spending hours filling out property cards. The site's SEO structure couldn't generate organic traffic, and filtering was primitive — clients left for competitors.

Solution

Created a Django platform with automatic synchronization and import from external sources, advanced filters, and an SEO-optimized URL and page structure. Automated publishing cut time costs and increased lead flow through organic search.

Django Celery PostgreSQL SEO Data import
05

Loyalty systems & CRM integrations

Challenge

An e-commerce business lacked customer retention tools. No loyalty program, fragmented CRM data, manual Google Shopping catalog uploads, and no automated triggers — all dragging down repeat sales.

Solution

Developed custom loyalty systems with point accrual, event-based automatic triggers, CRM integration via API, product feeds for Google Shopping and Telegram channels. Custom meta fields for flexible per-business configuration. Result: higher repeat sales and reduced customer churn.

Django CRM API Google Shopping Telegram Automation
06

TrendForU — fashion e-commerce platform

Challenge

A Barcelona-based fashion brand needed a full-featured online store with weekly product drops, a loyalty program, and real-time social proof — all built from scratch without relying on Shopify or other third-party platforms.

Solution

Built a custom Django e-commerce platform: product catalog with categories and image galleries, user accounts with authentication, shopping cart and wishlist, a loyalty points system, weekly drop scheduling, and live purchase notifications for social proof. Responsive design with animations and a custom cursor system.

Django PostgreSQL REST API E-commerce Loyalty system
View project →
trendforu.store
TRENDFORU
Fashion E-commerce · Barcelona
07

IQTag — blockchain brand protection platform

Challenge

Brands were losing revenue and reputation to counterfeit products. Existing anti-counterfeiting solutions were expensive, hard to integrate, and offered no direct channel for customer engagement after purchase.

Solution

Built a platform that secures products with blockchain-backed dual QR codes — a public one for product details and a hidden one for authenticity verification upon purchase. Customers scan with a smartphone to instantly verify products and mint exclusive NFTs as proof of ownership. Includes an analytics dashboard for brands and a reward system to drive customer loyalty.

Django Blockchain NFT QR Code Analytics
View project →
iqtag.io
IQTAG
Blockchain Brand Protection · Prague
08

Winessy — wine investment platform with NFT tokenization

Challenge

Access to premium Bordeaux en primeur wines was limited to importers, wine shops, and wholesalers. Individual investors had no way to buy Grand Cru Classé futures directly, and the market lacked transparency in pricing and storage.

Solution

Built a platform where investors purchase fractional wine ownership as NFTs — starting from a single bottle. Each token is backed by a real bottle stored in Bordeaux City Bond with full insurance. Features include real-time pricing analytics, sommelier evaluations, a secondary market for token trading, and the option to claim physical delivery. Integrated with Stripe for payments and blockchain for provenance tracking.

Django Blockchain NFT Stripe Investment platform
View project →
winessy.com
WINESSY
Wine Investment · NFT Tokenization
09

CorgiCafe — multi-location employee time tracker

Challenge

A chain of 5 cafes in Barcelona (Sagrada, Gótico, Gracia, Muntaner, Arc de Triomf) tracked employee hours on paper and spreadsheets. Each location operated independently — no unified system for work logs, overtime, or payroll. Managers spent hours reconciling data, errors were frequent, and there was zero real-time visibility into who was on shift.

Solution

Built a multi-tenant SaaS time-tracking platform with complete data isolation per cafe using PostgreSQL schema-per-tenant architecture. Each location gets its own workspace with employee management, real-time check-in/check-out, automatic work-hours calculation with overtime detection, and paid/unpaid holiday tracking. Role-based access separates admin dashboards (full control, employee CRUD, log editing, Excel export) from worker portals (personal schedule, clock in/out). Advanced filtering by date ranges (today, week, month, custom) and one-click Excel report generation for payroll processing. The system eliminated manual errors and gave owners instant visibility across all 5 locations.

Flask PostgreSQL Multi-tenant SaaS Excel export
corgicafe.app
CORGICAFE
Time Tracking · 5 Locations · Barcelona

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Testimonials

What clients say

★★★★★

Kirill built our AI chatbot from scratch. It now handles 70% of customer inquiries automatically and boosted online conversion by 35%. Response time went from hours to seconds. Absolutely exceeded expectations.

Marco R.
E-commerce Owner, Barcelona
★★★★★

The time-tracking system Kirill developed cut our payroll processing time by 80% and saved over 15 hours per week. We went from spreadsheet chaos to a clean dashboard across all 5 locations. Professional and reliable.

Laura S.
Cafe Chain Manager, Barcelona
★★★★★

We needed a Telegram bot with billing and multiple AI models. Kirill delivered a polished product in record time — we hit 500 paying users within 3 months. The architecture is clean and easy to maintain. Already planning the next project together.

Dmitry K.
Startup Founder, Berlin

Technologies

Stack & tools

Hover to explore connections

Backend

  • Python
  • Django / DRF
  • REST API
  • Celery
  • FastAPI

Data

  • PostgreSQL
  • Redis
  • SQLite
  • Elasticsearch

AI / ML

  • OpenAI API
  • LangChain
  • Prompt engineering
  • AI agents

Infrastructure

  • Docker
  • Nginx
  • Linux / VPS
  • CI/CD
  • Git

Integrations

  • Telegram Bot API
  • Payment systems
  • CRM / ERP
  • Google Shopping
  • Webhook / API

Architecture

  • Microservices
  • SaaS / Multi-tenant
  • Task queues
  • WebSocket
  • Event-driven

How I work

Process

01

Discovery

Deep dive into the business problem. Define key requirements, constraints, and success metrics.

02

Architecture

System design: stack selection, data structures, API contracts, integration plan.

03

Development

Iterative development with regular demos. Clean code, test coverage, documentation.

04

Launch

Server deployment, monitoring setup, load testing, final review.

05

Support

Monitoring, optimization, feedback-driven improvements. Long-term project maintenance.

Pricing

Transparent pricing

Every project is unique, but here are typical starting points. Final price depends on scope, integrations, and timeline.

TELEGRAM BOT
from €1,000
  • ✓ Command handling & menus
  • ✓ Database integration
  • ✓ Admin notifications
  • ✓ Deployment & docs
Learn more →
POPULAR
AI CHATBOT
from €4,000
  • ✓ OpenAI / LangChain integration
  • ✓ Context-aware conversations
  • ✓ CRM / product catalog sync
  • ✓ Analytics dashboard
Learn more →
SAAS PLATFORM
from €7,000
  • ✓ Multi-tenant architecture
  • ✓ Subscription billing
  • ✓ Admin panel & roles
  • ✓ API & integrations
Learn more →
View all services

FAQ

Frequently asked questions

How much does a typical project cost?

A simple Telegram bot starts at €1,000. AI chatbots and mid-size backends range from €3,000–€8,000. Full SaaS platforms start at €7,000+. I provide a detailed estimate after a free discovery call, so there are no surprises.

How long does development take?

A bot or integration: 1–2 weeks. A mid-size web app: 3–6 weeks. A full SaaS platform: 6–12 weeks. I work in iterations with regular demos, so you see progress from week one.

Do you work with international clients?

Yes. I’m based in Barcelona and work with clients across Europe, the US, and worldwide. Communication in English, Spanish, or Russian. I use Telegram, WhatsApp, and email for project coordination.

Can you integrate AI into my existing system?

Absolutely. I specialize in embedding AI (OpenAI, LangChain) into existing business workflows — chatbots for support and sales, content generation, recommendation engines, and custom AI agents. Integration can be done without rebuilding your current system.

What happens after launch?

I offer ongoing support and maintenance. This includes monitoring, bug fixes, performance optimization, and feature updates based on user feedback. Most clients continue working with me after launch.

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Contact

Let's discuss
your project

Tell me about your challenge — I'll suggest a solution and estimate the timeline. I work with established companies and early-stage startups alike.

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