Profile
Full-stack developer, Co-Founder, and CTO of Digitay.pl. Running my own agency and simultaneously managing over 50 clients has forged my ability to thrive under immense pressure and a constant avalanche of tasks. I am highly committed, stress-resistant, and capable of maintaining exceptional focus even in the most demanding, fast-paced environments. My day-to-day reality requires flawless time organization and the resilience to balance high-level technical architecture, active company growth, and hands-on development.
I merge clean engineering with deep product thinking and business understanding. Taking personal responsibility for the success of dozens of businesses has taught me to prioritize measurable outcomes over theoretical perfection. Whether it's architecting scalable Next.js and Django applications, resolving critical technical debt, or coordinating a development team, I deliver reliable solutions regardless of the pressure.
Experience
CTO & Co-Founder
2023 to PresentAs Co-Founder and CTO of my own digital agency, I lead the company's technical vision, actively manage our development team, and organize complex project workflows. Taking immense personal responsibility for the success of 50+ individually managed clients, I ensure we deliver advanced, measurable results. My core focus spans driving the company's active growth, architecting scalable solutions, and managing end-to-end project delivery.
- Build and deliver custom websites and online stores for clients using Next.js, Django, and CMS platforms (WordPress, Sellstick)
- Optimize and fix existing WordPress and CMS-based e-commerce stores: page speed improvements, technical debt resolution, conversion-oriented UX
- Plan and execute SEO strategies: technical audits, on-page optimization, keyword research, SEO-friendly blog content writing
- Create and manage Google Business Profiles: optimizing local visibility, review management, accurate business information
- Direct client consulting: translating business goals into technical requirements, maintaining long-term relationships
- Team management: code reviews, task delegation, sprint planning, quality assurance, and mentoring developers
- Implemented analytics stacks (GTM, GA4), conversion tracking pipelines, and Google/Meta Ads campaigns
- Orchestrate development and deployment cycles under high pressure, maintaining flawless delivery for 50+ clients simultaneously
- Manage end-to-end project delivery from discovery to deployment on VPS infrastructure with Nginx
Key Projects
Katalogo.pl
Lead Developer & ArchitectFull-stack business directory platform and the largest verified business database in Poland with 71,000+ listed companies and 250K to 300K monthly visitors.
- Architected the entire platform from scratch: database schema, API layer, SSR/SSG rendering, component system
- Built a multi-tenant data pipeline with automated deduplication and category mapping across 4,900+ industry categories
- Implemented SEO-first architecture: dynamic sitemaps, JSON-LD structured data, semantic HTML, optimized meta tags
- Designed scalable search with PostgreSQL full-text search, city + category compound filtering, server component rendering
- Created the 'Strefa Partnera': business self-registration, profile editing, photo uploads, promoted listings
- Performance-optimized for Core Web Vitals: lazy loading, image optimization, Prisma query tuning
AI Trainer
Developer & ML EngineerCustom AI model for image recognition and object detection. Built as a vision backbone for automation bots and intelligent agents.
- Developed a cascade classifier training pipeline using OpenCV: dataset collection, labeling, supervised learning
- Built HSV color-space filtering and edge detection modules for real-time object detection
- Created a real-time window capture system for live screen analysis, frame-by-frame processing
- Modular architecture: separate vision, filtering, and capture layers pluggable into any automation framework
C++ Algorithms & Data Structures
DeveloperA collection of 7 standalone C++ projects exploring core CS fundamentals: sorting algorithms, queue data structures, file processing, and time logic.
- Implemented Bubble Sort, Bucket Sort, and general-purpose sorting toolkits with manual memory handling
- Built custom queue (FIFO) data structures: standalone and integrated with sorting for priority-based processing
- Developed a Linux file sorting utility using C++ I/O streams and POSIX interfaces
- All raw implementations (no STL sort, no external dependencies) focused on algorithmic internals
Technical Skills
Frontend
Backend & Infrastructure
CMS & E-commerce
AI & Data
Analytics & Marketing Tech
Workflow & DevOps
Languages (Programming)
Core Competencies
Education
Self-taught & Continuous Learning
Practical expertise built through real-world project delivery for 50+ clients, taking direct responsibility for their business outcomes. Supplemented by open-source contributions, technical documentation study, and structured online learning across full-stack development, machine learning, DevOps, and digital marketing.
Languages
Polish
Native
English
Professional
Contact
Website
digitay.plGitHub
github.com/Maciejowskii