Case studies

Case studies: Django backends, automation, and AI products

Each case study is written around the business goal, the constraints, and the measurable outcome. Backend engineering is the means, not the point.

Available now

I currently have 20 hours a week for B2B contracts: Django backend work, LLM/RAG integrations, technical consulting, and GEO / AI visibility audits (the audits mainly for Polish B2B companies, through AiVisible.pl).

Describe your project

Terms

  • Rate: from 150 PLN/h net (+VAT)
  • Availability: 20h/week
  • Work model: remote, based in Katowice, Poland
  • Invoicing: VAT invoice, B2B contract
B2B terms

Prefer e-mail? contact@rafalfuchs.dev

AiVisible.pl is the AI visibility agency I founded and run: it audits, improves, and monitors how B2B brands appear in answers from ChatGPT, Gemini, Claude, and Perplexity.

PythonDjangoPostgreSQLdata automationAPI integrations

Business value: A B2B company gets a clear answer whether AI assistants recommend it, who wins the competitive shortlist, and which changes improve visibility beyond classic SEO.

Outcome: An agency combining AI Visibility audits, GEO/AEO implementation, monitoring, education through a blog and knowledge base, and technical infrastructure for repeatable diagnostics.

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An AI assistant for parents taken from MVP to a live subscription SaaS: Django/DRF backend, Stripe billing, and OpenAI-powered conversations.

PythonDjangoDjango REST FrameworkPostgreSQLRedis

Business value: A monetizable digital service launched quickly: subscriptions worked from day one and the architecture allowed adding AI and content features without rework.

Outcome: Operational SaaS product with a predictable revenue model and secure data handling.

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Backend for Useme Plus, a membership product that lets freelancers settle work without registering a business: cost calculator, Autenti e-signatures, and automated membership validation.

PythonDjangoDjango REST FrameworkPostgreSQLCelery

Business value: A new revenue line for the platform, faster member onboarding, and a customer-service team relieved of manual validation.

Outcome: Functional Useme Plus product with cost calculator, electronic document flow, and automated membership validation.

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Rebuilt job and freelancer search on Useme, a marketplace with thousands of active jobs a month: full filtering, an SEO tag system, a denormalized read model, rolled out under feature flags.

PythonDjangoDjango REST FrameworkPostgreSQLCelery

Business value: Simpler search for users, faster page loads through a denormalized read model, more Google visibility from a larger SEO tag base, and rollouts with no service interruption.

Outcome: Rebuilt search engine with full filtering by categories, tags, and phrase, SEO tag system with CSV import, and secure deployment process.

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A daemon that scans KAS and tax-office listing pages every 2.5 seconds, detects new sale offers, prepares the e-mail application from the listing data, and reports every step to Discord.

PythonPlaywrightSQLitesystemdHTTP scraping

Business value: In this process seconds decide: whoever detects a listing first can file the purchase request first. The team learns about a new listing within seconds instead of checking pages by hand.

Outcome: A monitoring service running near continuously: deduplicated detection, e-mails generated per listing type, Playwright fallback for protected pages, and full operational visibility in Discord.

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A data pipeline for a services company that collects, normalizes, validates, and schedules outbound lead data so campaigns start without manual clean-up.

PythonDjangoPostgreSQLautomation workflowsintegrations

Business value: More qualified leads at lower operational cost and with higher data quality.

Outcome: Repeatable lead acquisition and handling process, ready for campaign volume scaling.

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A Django automation suite connecting partner and internal APIs with asynchronous orchestration and SLA reporting, for an organization whose critical workflows ran across disconnected tools.

PythonDjangoAPI integrationsasynchronous processingdata automation

Business value: Shorter process cycle time and fewer manual errors in business-critical workflows.

Outcome: Predictable operational workflows with clear reporting and data quality control.

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