@kkalamarski
Fullstack Javascript Developer @ Exlabs
🚀 CTO & Co-founder at Techfinity Studio — AI-driven software studio 👨💻 Full-stack developer, technical leader For the past 11 years, I’ve been building modern software solutions — today as the CTO and co-founder of Techfinity Studio, where we help companies build smart, efficient, and secure digital products. We use the right mix of technologies — from custom software to AI-driven solutions and low-code platforms — to deliver real business value. 💡 Key areas of expertise: • TypeScript, React, Next.js, Node.js, NestJS • AI integration & AI-driven apps • Security-first architecture • Functional Programming I’m passionate about building great software and helping organizations navigate the rapidly evolving tech landscape. Outside of work, I enjoy ♟️ playing chess and exploring the intersection of technology and creativity. 🌍 I work in an international environment. Languages: 🇵🇱 Polish (native) 🇬🇧 English (fluent) 🇪🇸 Spanish (fluent) 🇵🇹 Portuguese (good) 🇧🇬 Bulgarian (communicative) 🤝 If you’d like to connect to discuss: • building modern digital products • applying AI where it makes sense • designing secure and scalable architecture • or simply exchange ideas on technology Feel free to reach out!
🚀 Advisory & Consulting - AI-driven software solutions - Software architecture & security-first design - Modern full-stack development (TypeScript, React, Next.js, Node.js, NestJS) - Functional Programming in business applications 🤖 AI Strategy & Integration - Identifying real-world use cases for AI in your business - Prototyping and building AI-powered products - Leveraging AI in combination with custom code and low-code platforms 💼 CTO-as-a-Service - Supporting startups and scale-ups with technical leadership - Helping founders make strategic technology choices - Building and scaling engineering teams 🎤 Speaking & Content Collaboration - Talks on AI in real-world software - Security-first mindset in modern development - Functional Programming, TypeScript ecosystem - Chess & tech — lessons from the board to software 🌍 Networking & Partnerships - Co-innovation projects - AI & tech partnerships - International collaborations (languages: Polish, English, Spanish, Portuguese, Bulgarian)
Jun 11, 2025 · 3 min read · The longer I lead software projects, the more I see how critical it is to decide when you start thinking about security. Too often, teams adopt this approach:"Let’s build the system first, then we’ll see what needs to be secured."This mindset almost ...
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Oct 17, 2024 · 10 min read · As developers, we strive to deliver secure systems to our clients. However, with large applications and hundreds of potential vulnerabilities and attacks, performing manual security testing for each new release can be a daunting task. Fortunately, th...
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Dec 27, 2022 · 5 min read · Neovim is a powerful and highly customizable text editor that is well-suited for a wide range of programming and text editing tasks. If you are looking for a fast and reliable text editor, Neovim is definitely worth considering. However, using it may...
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Dec 9, 2022 · 9 min read · UPDATE 2025:Updated the text to mention immutable methods introduced to Javascript. Over my 10 years of working as a software engineer, I've tried many different programming languages. In my professional career, I started with PHP, later switched to...
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Aug 28, 2022 · 8 min read · This is the 4th part of the series where we build a virtual DOM from scratch. If you haven't already, you can check out the previous parts here: https://kkalamarski.me/series/virtual-dom What will we create So far, our virtual DOM library is capable ...
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