Gabriel Marek

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.

About

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.

  • Joined November 2025

Languages

  • EnglishFluent

Industry experience

  • Software & Internet
  • Computers & Electronics
  • Professional Services

More experts

Projects · 1

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.

MailerLite Website - Built with Next.js
  • Front-End Developer
  • UI Designer

Work experience· 4 roles

Senior Software Engineer · BulcodeJan 2024 – Nov 2025 · 1 yr 11 mos

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 · Advania GroupDec 2023 – Dec 2023 · 1 mo

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 · SoftellarDec 2021 – Dec 2021 · 1 mo

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 · The Software HouseDec 2018 – Dec 2018 · 1 mo

Education

Bachelor's Degree in Computer Science · Silesian University of Technology2012 – 2015

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