Specializations · B2B

Scope of services

Four things I do well: I rescue production, modernize old systems, automate processes, and build applications from scratch.

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Projects typically start around 5,000 PLN net. The exact quote always follows a conversation, within 48h. What drives the price →

4 specializations B2B / contract Remote + on-site
01
01

Production System Stabilization

I join systems that "work, but..." — critical financial bugs, access control gaps, failing integrations. Including no-code/low-code platforms where the vendors say "impossible". I isolate the root cause, not patch symptoms.

Fixing critical financial bugs (payouts, settlements, double-charging)
Access control and security (OAuth, RBAC, permission audits)
Workarounds for no-code platform limits (external microservices, webhooks)
Monitoring and automated data audits (nightly reports, Telegram alerts)

Typowe rezultaty

18,080 CHF payout: from ~126 s (crashing) to 3.9 s
6 deploys in 8 weeks for a Swiss studio
Node.jsDenoPostgreSQLSupabaseTelegram API
02
02

Legacy System Modernization

Previous developer vanished with the code, but the system still runs the business? The database and network traffic are documentation enough to rebuild the backend — cheaper and faster than a full rewrite.

API reverse-engineering from HTTP traffic and the database schema
Backend replacement without touching the frontend (same API contract)
Zero-downtime database migrations with a rollback plan
Move to modern infrastructure (HTTPS, off-site backups)

Typowe rezultaty

Order printout time: from ~15 s to <1 s
Production cutover in 14 minutes, zero data loss
Node.jsExpressMySQLCaddyDockerHetzner
03
03

Process Automation + AI

LLM pipelines on real client data, not demos. I automate the processes that eat a salary every month — and I say it straight when something is not worth automating.

Classification and scoring of documents, tickets, listings (multi-phase pipelines)
Transcription and audio processing (Whisper + hallucination cleanup)
Lead-qualifying chatbots on your own company data
AI integration with existing systems via API

Typowe rezultaty

100 job listings analyzed in 2 min for <$0.30
Lead-qualifying chatbot built in 2 days
PythonClaude APIWhisperNode.jsSupabase
04
04

Applications from Scratch / MVP

From spec to production in weeks, not months. Instead of three separate apps (Android, iPhone, desktop) — often one that runs everywhere, at a fraction of the price. A real quote upfront, no "phase 2".

Architecture and technology choices for the real problem (not the invoice)
One app for phone and desktop — home screen icon, works offline too
Payments (Stripe), multi-company accounts, roles and permissions
Deployment, CI/CD and post-launch supervision

Typowe rezultaty

SaaS booking core: 9/9 E2E tests on production
One app instead of three separate ones — ~1/3 the price
Next.jsAstroTypeScriptSupabasePostgreSQLStripe
05

Got a system that "works, but..."?

Describe the problem Prefer to write directly?