Mariusz
Tarnaski

• Training
• AI Workflows
• BMad

End-to-end AI adoption for development teams. I define AI agent workflow standards, establish code review practices, prompt patterns and guardrails, select tools, and build daily workflows. Developers in these companies prove every day that AI is capable of delivering ambitious projects.

• Open Source
• macOS
• Swift
• DevTools

A free macOS app I wrote for myself and published openly. Claude Code and Codex only ever show the account you happen to be logged into, so with a dozen subscriptions, finding one that still has room means switching and checking over and over. Headroom polls every account at once and shows, in a single panel, how much is left in each limit window and when it comes back.

• SaaS
• Web App
• Mobile
• STT
• AI Assistant

A platform that works on both sides of a service job. Service companies manage clients, facilities, work orders, and recurring maintenance with a full repair history. The technician in the field simply dictates notes into their phone, and AI transcribes the audio and video, then uses it to suggest which parts to order from a supplier. The supplier keeps working in their own email inbox, enhanced with a management layer: assigning emails to people, statuses, and deadlines. AI analyzes each inquiry and proposes ready-to-send reply drafts with prices from the product catalog, and technicians can search that same catalog themselves right from the Helpi app.

• FinTech
• Web App
• MCP Server
• SaaS

A web tool for planning major life decisions by modeling your finances for years ahead. You enter income and expenses, and the app shows projected cash flow and balances up to 10 years ahead. You compare “what if” scenarios and get alerts about months when things may get tight. You can talk about your finances in natural language in your favorite AI tool thanks to MCP integration.

• Computer Vision
• OCR
• Automation

Visual content recognition system for product label photos, built for an international standardization organization on behalf of the UAE government. The system identifies the product, class, manufacturer, composition, and certifications from photos, then automatically fills registration forms. A process that took days was reduced to minutes.

• RAG
• Embeddings
• Vector DB

A knowledge search engine that processes gigabytes of technical documentation for an industrial robotics manufacturer. The system delivers precise answers to engineers' questions based on internal company databases, drastically reducing information lookup time.

• Persona AI
• RAG
• Voice
• TTS

A platform for creating virtual avatars of well-known personalities. Based on materials from YouTube, TikTok, and other platforms, we build the psychological profile, speaking style, and knowledge base of each person. Users chat with the avatar, which replies like the real influencer, with their knowledge and personality. Every response can also be listened to in a generated voice of that person. An ideal tool for learning from authorities in any field.

• Go
• Rust
• Open Source
• CLI

An intelligent assistant that supervises and coordinates multiple AI programming tools simultaneously. Manage Claude Code, Codex, and other tool sessions by voice or from your phone, even when away from your computer. Nupi automatically assigns tasks, monitors progress, and reports results.

• Open Source
• ACP
• E-commerce
• PHP

The world's first PHP library for OpenAI's Agentic Commerce Protocol. It enables selling products directly in ChatGPT and other AI tools. A new customer acquisition channel that will revolutionize the market.

• Computer Vision
• Mobile
• ML

The fastest way to find the cheapest deal on a LEGO set. Just point your phone camera at the box on a store shelf, and the app recognizes the set in under 2 seconds and compares online prices. The ML model runs locally on the phone, with no internet connection required.

• Desktop App
• Gmail
• SaaS

A desktop app that lets you comfortably work with multiple Gmail accounts in one place. No more juggling dozens of browser tabs, all your accounts are at hand. With the multi-panel view you can easily work with multiple emails at the same time. Instant switching between accounts, system notifications, global keyboard shortcuts, and system tray integration. Available on macOS, Windows, and Linux, in 37 languages.

• Open Source
• macOS
• Swift
• CoreAudio

A free macOS app I wrote for myself and published openly. In macOS 26 Tahoe the system volume overlay moved to the top-right corner, which on a wide or multi-display desk means hunting for it. Centered Volume draws its own panel in the middle of the screen, above the dock, and lets you switch output with one click instead of a trip to Settings.

• LEGO
• Hobby
• Collection
• Fan Site

A site made out of passion, dedicated to the LEGO BrickHeadz series, which I collect and love. I tracked down many details about how the series came to be, the designers' behind the scenes work, and the later stories of individual sets. The site features a catalog of over 200 figures, trivia about rare sets, news, a microblog, and my complete collection.

• SaaS
• Docker
• Tunneling
• DevTools

A tool for securely sharing local projects over the internet. With a single Docker command, you create a tunnel that lets clients, testers, or other developers see your local service at a public URL. Ideal for demos, mobile testing, webhooks, and team collaboration without deploying to a server.

• Docker
• Course
• DevOps
• Education

A Docker course designed together with Łukasz Lach, Poland's first Docker Captain. 13 hours of video content, 227 lessons. Modules tailored to specific technologies: PHP, Python, Node.js, MySQL, PostgreSQL, MongoDB, Nginx, Redis, and more. Each lesson includes ready-to-use configurations for your own projects.