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Full-stack developer · Founder

Hi, I’m Martin Michalka.

I’m a young full-stack developer who builds complete business systems, fast. CRM, operations software, integrations, AI and the servers they run on: I design it, build it and ship it myself, with a small team when the project needs one.

  • Based in Slovakia
  • Software company agencia.sk for Slovakia & Czechia
  • Open to international projects

Who I am

I run agencia.sk, a custom software company serving businesses in Slovakia and the Czech Republic. Company Maxxing is how I work with clients internationally. Same person, same team, same way of working, in English.

I’m a generalist on purpose. One person who understands the business process, the database, the interface, the integrations and the server catches problems that get lost between specialists, and moves much faster.

What I can do

  • Full-stack web apps: TypeScript, Node.js, Next.js, React, PostgreSQL, Python.
  • Business systems: CRM, ERP-style operations tools, HR and shift planning, client portals, booking and inventory.
  • Integrations: accounting systems, Google, Microsoft, Meta, payment providers, telephony and any system with an API or an export.
  • AI: assistants over company data, AI phone receptionists, document processing and automated workflows.
  • Infrastructure: Linux servers, deployments, backups, monitoring and security hardening.
  • Mobile and video: mobile apps for field teams and programmatic video with Remotion.

How fast I work

I use AI-assisted development and a library of components I’ve already built and tested in production. That means a working prototype on your real process in days, not months, and a first production release in weeks.

  • Day 1–3: we talk through the process and I come back with a clickable prototype.
  • Week 1–4: first working release for one team, on your data.
  • After that: weekly releases, each one reviewed and accepted by you.

Speed never replaces the basics: backups, access control, tested deployments and documentation are part of every release.

Systems I’ve built

A selection of real projects. I don’t publish client names or screenshots without permission, so here is what each system does.

  • Multi-branch real estate CRM
    Leads from portals and the website, property, owner and buyer records, viewings, commission rules and dashboards per branch and agent. Running in production for a real estate network.
  • Operations system for a security services company
    Guards, sites, shifts, attendance, incidents and client reporting in one system with mobile access for staff in the field.
  • Sales CRM on top of an accounting system
    A sales CRM connected to existing accounting data, with an AI assistant that answers questions over customer and sales records.
  • Role-based operations for a renovation company
    Projects, crews, purchasing, recruiting and sales handoffs, with each role seeing only its own tasks and management seeing the whole pipeline.
  • AI phone receptionist
    A voice assistant that answers calls, qualifies the request, books follow-ups and writes the result into the CRM.
  • Property valuation app
    An online valuation tool for a real estate agency that turns visitors into qualified seller leads delivered to the team instantly.
  • Company database for Slovakia and Czechia
    A warehouse of registered companies with industry, size and contact data, used for market mapping and targeted outreach.
  • Automated ad and content engine
    Programmatic video and image ads rendered from templates, with publishing and reporting through the Meta API.
  • Legislation tracker
    A monitor that follows new laws and amendments and flags the ones that affect specific types of companies.
  • Booking and accommodation manager
    Reservations, availability and guest communication for accommodation providers.
  • Chat-driven CRM
    A CRM where users create records, ask questions and run reports by typing a sentence instead of clicking through forms.
  • Server security incident response
    Containment, clean rebuild and hardening of compromised production servers, with services moved to a new trusted host.

International projects

I work remotely with clients anywhere, in English, on European time. Fixed-scope projects, longer builds and ongoing development are all welcome. If you have a system to build, a project another vendor left unfinished or a process stuck in spreadsheets, send me a short brief.

Start with one workflow

Bring the process. We’ll discuss the scope.

Tell us where work gets stuck, which systems are involved and who needs the result. We’ll use the first conversation to assess fit, data readiness and the next step. Collaboration is primarily in English.

Discuss your project →