I'm Gabriel Marek, a Senior Blockchain & Full Stack Developer with 10 years of experience designing, building, and deploying secure, scalable dApps across multi-chain ecosystems. I excel at turning complex problems into robust solutions and I enjoy leading cross-functional teams through architecture, implementation, and delivery. I work across DeFi, NFT automation, staking, and multi-chain platforms with a strong emphasis on security, gas optimization, and performance. I love shaping product strategy, mentoring colleagues, and shipping high-quality code that stands the test of time.…

Gabriel Marek

I'm Gabriel Marek, a Senior Blockchain & Full Stack Developer with 10 years of experience designing, building, and deploying secure, scalable dApps across multi-chain ecosystems. I excel at turning complex problems into robust solutions and I enjoy leading cross-functional teams through architecture, implementation, and delivery. I work across DeFi, NFT automation, staking, and multi-chain platforms with a strong emphasis on security, gas optimization, and performance. I love shaping product strategy, mentoring colleagues, and shipping high-quality code that stands the test of time.…

Available to hire

I’m Gabriel Marek, a Senior Blockchain & Full Stack Developer with 10 years of experience designing, building, and deploying secure, scalable dApps across multi-chain ecosystems. I excel at turning complex problems into robust solutions and I enjoy leading cross-functional teams through architecture, implementation, and delivery.

I work across DeFi, NFT automation, staking, and multi-chain platforms with a strong emphasis on security, gas optimization, and performance. I love shaping product strategy, mentoring colleagues, and shipping high-quality code that stands the test of time.

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Skills

Experience Level

Python
Expert
Solidity
Expert
Ethereum
Expert
JavaScript
Expert
Node.js
Expert
Rust
Expert
Express
Expert
Ethers.js
Expert
Docker
Expert
TypeScript
Expert
Go
Expert
GraphQL
Expert
MetaMask
Expert
NFTs
Expert
Vue.js
Expert
MongoDB
Expert
SQL
Expert
Redis
Expert
PostgreSQL
Expert
MySQL
Expert
Kubernetes
Expert
Django
Expert
AWS
Expert
Selenium
Intermediate
Assembly
Intermediate
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Language

English
Fluent

Work Experience

Senior Software Engineer at Bulcode
January 1, 2024 - November 13, 2025
Led the development of DEX & CEX platforms with staking, P2P trading, and a FeeHandler system; designed multi-chain smart contracts for Ethereum, Binance Smart Chain, and Solana; implemented multi-signature wallets; led MetaSwap automation reducing token conversion time by 40% and increasing transaction efficiency by 25%; deployed tokens and registered on CoinGecko/Uniswap; contributed to scalable blockchain solution architecture with gas optimization and NFT marketplace automation; implemented testing with Chai, Mocha, Hardhat, and Anchor.
Software Engineer at Advania Group
December 31, 2023 - December 31, 2023
Led a team of 7 engineers in building a blockchain-based decentralized ticketing system with real-time validation, multi-chain support (Ethereum & BSC), secure wallet integration with multi-signature, and DeFi staking features; optimized backend with microservices and Rust components; improved system availability and performance.
Full Stack Developer at Softellar
December 31, 2021 - December 31, 2021
Designed automated trading algorithms for DeFi platforms, built secure token issuance with liquidity pool integration, and developed high-performance trading engines using Go and Rust; created a scalable backend for blockchain-based financial services; implemented Python data scraping for real-time price data feeding trading bots.
Backend Developer at The Software House
December 31, 2018 - December 31, 2018
Specialized in Python-based web scraping for market research; developed automated crypto-arbitrage bots and maintained full-stack apps with Flask, HTML, CSS, JS, and RESTful APIs; built automated data pipelines, improving processing efficiency and accuracy; utilized BeautifulSoup, Scrapy, and Selenium for large-scale data gathering.

Education

Bachelor's Degree in Computer Science at Silesian University of Technology
January 1, 2012 - January 1, 2015

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Computers & Electronics, Professional Services
    paper MailerLite Website - Built with Next.js

    This project involves the development of MailerLite’s website, which is a powerful email marketing platform. The site is built using Next.js, a popular React framework known for its fast performance and SEO benefits. The website is optimized for both desktop and mobile devices, ensuring seamless user experiences. The platform enables businesses to easily create and manage email campaigns, automate workflows, and analyze email performance.

    The project leverages server-side rendering (SSR) and static site generation (SSG) offered by Next.js, enabling fast page loads and improved SEO. It integrates various marketing tools and services to enhance user engagement, with clear call-to-action buttons guiding users to sign up and start their email campaigns.

    Some key features of the project:

    User-friendly interface for creating and managing email campaigns.

    Real-time performance analytics and reporting.

    Responsive design for mobile and desktop.

    Integration with popular email service providers.

    Utilization of Next.js for fast rendering and SEO optimization.