Bartolomej Kozorog

Background

About

Senior Software Engineer & Zero-to-One Product Builder with 5+ years of experience turning early-stage ideas into shipped products across AI, blockchain, and developer tooling. Hands-on across the stack, from architecture and backend systems to product design and user experience, with practical experience spanning programming languages, language models, blockchains, and cloud infrastructure.

Work Experience

Co-Founder, Taluna
Jan, 2025 - Present
Co-founding and leading engineering for Tanula, building AI-powered talent search product.
- Built the initial proof of concept within a week and expanded it into a working MVP
- Researched and co-authored the first version of a whitepaper
- Responsible for the initial design and implementation of the core system
- Leading NLP engineering using LLMs (data preperation, evaluation, fine-tuning)
- Working closely with the team on product, design, testing, and go-to-market.
Software Engineer (outside collaborator), Flow blockchain
Jan, 2024 - Jan, 20251 year
Contributed to the Flow blockchain ecosystem as an external collaborator focused on Cadence tooling and security.
- Built the official Cadence code formatter under Flow’s grants program.
- Discovered a high-severity security vulnerability in the Cadence compiler and published a detailed technical report describing impacted areas, potential resolutions, and reproducible code.
- Collaborated with Flow’s core team on language tooling, bug fixes, and open-source contributions.
Co-Founder / Lead Engineer, Flowser
Jan, 2022 - Jan, 20242 years
Co-founded and led engineering for Flowser, a suite of developer tools in the Flow blockchain ecosystem.
- Won the Flow hackathon in 2022 with the initial Flowser GUI dev tool, kick-starting the product.
- Led the development and maintenance of the Flowser developer tools.
- Participated in various Flow hackathons and community events/calls.
- Contributed to many core and community-built tools in the Flow ecosystem.
Software Engineer, Kazm
May, 2022 - Dec, 20242 years 7 months
Backend and integrations engineer for Kazm’s membership-building platform.
- Designed and led development of key features for Kazm’s membership-building platform.
- Built and maintained integrations with blockchain networks, Zapier, and a public REST API.
- Collaborated closely with product and design teams to define user experience and technical direction.

Skills

Go
Go

Blockchain developer tools

Programming language formatter

Backend systems
Blockchain
Blockchain protocols

Blockchain applications

Blockchain developer tooling
TypeScript
TypeScript

JavaScript
Programming Languages
Compilers

Programming languages

Parsers

Lexing
Developer Tools & DX
Developer tools

Programming clients

APIs

Developer experience

Documentation
Machine Learning & AI
Machine learning fundamentals

Large language models

RAG

Agentic systems

Domain adaptation

Education

Computer Science, Bachelor, University of Ljubljana
Jan, 2020 - Jan, 2023
Computer Science, High School, Technical school Nova Gorica
Jan, 2016 - Jan, 2020

Awards

High-severity security vulnerability reward , Flow blockchain
Awarded on: Jan 01, 2024
Discovered and reported a high-severity DoS security vulnerability in flow-go and received a responsible disclosure reward.
Flow FLIP-fest hackathon winners , Flow blockchain
Awarded on: Jan 01, 2021
As a team of three (monikaxh, jgololicic, and Bartolomej), won the FLIP-fest two-month hackathon hosted by Flow blockchain with the submission "Flowser Block Explorer GUI", which later evolved into a comprehensive suite of developer products under the Flowser brand.
EESTech challenge hackathon 2022 winners , Endava
Awarded on: Jan 01, 2022
As a team of three (jakic12, ployjon, and Bartolomej), won the Endava NLP4GOOD challenge with the project bitter-blocker.