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AI Systems Architect — Barcelona

AI systems that
cut costs 40%

I design and build AI-powered automation systems for European SMEs. From intelligent chatbots to full backend infrastructure — architected for measurable ROI.

Book AI Systems Assessment → See case studies ↓
Backend Systems AI Chatbots SaaS Platforms Automation Backend Systems AI Chatbots SaaS Platforms Automation
40% average cost reduction
70% support queries automated
3–6 weeks to first results
9 production systems shipped

The cost of doing nothing

€24,000/year lost

Your support team answers the same 50 questions every day. That's €2,000/month in salaries — and customers still wait hours for a reply.

AI chatbot solution

AI chatbot that handles 70% of inquiries instantly. Built in 3–6 weeks. Pays for itself in 2 months.

See how I did it →
€18,000/year in errors

You track employee hours in spreadsheets. Payroll takes 15 hours/week. Calculation errors and overtime leaks drain your margin silently.

SaaS platform solution

Custom SaaS platform with real-time tracking, role-based access, and auto-export. Running across 5 locations in Barcelona.

See how I did it →
€30,000+ agency quotes

You have a product idea but no technical co-founder. Agencies quote €30K+ and 6 months for something that should cost a fraction of that.

Production-ready system

Production-ready system with billing and users. 0 to 500 paying users in 3 months. Starting from €3,000.

See how I did it →

About

Kirill Strelnikov — AI Systems Architect, Barcelona

I architect systems that
eliminate operational waste

I'm an AI systems architect based in Barcelona, specializing in automation infrastructure for European SMEs. I don't write code for the sake of code — I design systems that eliminate operational waste and create measurable business value.

Over the years I've grown from classical backend development to full-cycle systems architecture — from business requirements analysis to deployment and ongoing optimization. I work with AI integrations, intelligent automation, 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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Systems delivered
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Years architecting systems
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Documented case studies
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Technology domains
Time in development

Systems & solutions

How I create
impact

01

Intelligent customer systems

Reduce support costs by 40–70% with AI-powered customer interaction systems. Chatbots for sales and support, recommendation engines, content generation, and Telegram bots with monetization — all integrated into your existing workflows.

02

Scalable backend architecture

Production-grade systems designed for growth. REST APIs, microservice architecture, task queues, WebSocket, and third-party integrations — built with Python and Django for reliability at scale.

03

Operational automation

Eliminate manual workflows that drain margin. CRM integrations, automatic triggers, loyalty systems, cross-platform data sync, catalog management, and marketplace integrations — all running without human intervention.

04

Product & platform engineering

From concept to revenue-generating platform. Multi-tenant SaaS architecture, billing, admin panels, role-based access, and reporting — for e-commerce, real estate, HoReCa, and other industries.

05

CRM & data infrastructure

Unified customer data, automated pipelines, and actionable insights. CRM configuration, data import, custom automations, email sequences, reporting dashboards, and migration from legacy systems.

06

Performance marketing systems

Data-driven acquisition systems with conversion tracking. Campaign setup, keyword research, ad copy, remarketing, A/B testing, and ongoing optimization — from initial launch to scaling strategy.

07

E-commerce optimization

Revenue-optimized store experiences. Theme customization, Liquid templates, app integrations, checkout optimization, and custom Shopify app development. Headless commerce with API integrations.

08

Custom integrations & workflows

Connecting your tools into a unified system. 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
70%inquiries automated
+35%conversion lift
3weeks to deliver
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
500paying users
3 moto monetization
6AI models
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
-80%payroll time
5locations
15hsaved per week
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
3xorganic leads
Autolisting sync
4weeks to deliver
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

Testimonials

What clients say

★★★★★
+35% conversion lift

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.

MR
Marco R.
E-commerce Owner, Barcelona
★★★★★
-80% payroll processing time

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.

LS
Laura S.
Cafe Chain Manager, Barcelona
★★★★★
500 paying users in 3 months

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.

DK
Dmitry K.
Startup Founder, Berlin

All systems are designed GDPR-compliant. Data processing and AI integrations follow European data protection standards.

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

Strategic fit call

We assess whether your business challenge matches my expertise and approach. No pitch — just an honest conversation about fit.

02

Systems assessment

Deep analysis of current workflows, bottlenecks, and automation potential. I map where time and money are being lost.

03

Architecture & roadmap

Detailed technical plan with timeline, milestones, and expected ROI. You know exactly what you're getting before development begins.

04

Implementation

Iterative development with weekly updates and milestone demos. Full transparency at every stage.

05

Launch & scale

Deployment, monitoring, optimization, and ongoing partnership. Your system grows with your business.

Contact

Start with a
strategic fit call

I work with a limited number of clients to ensure depth and quality. Not every project is accepted — but every accepted project gets my full attention.

✓ Strategic fit call ✓ Reply within 2 hours ✓ No commitment

Kirill's AI Assistant

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