For the best experience, view on desktop or download PDF.
Photo

Gldywn

Senior Full-Stack Engineer | Blockchain & Web3

TL;DR

Solidity (Foundry or Hardhat), Node.js (TypeScript), .NET Core (C#), React, Next.js, Vue.js, Angular, React Native, Expo, Ethers, Wagmi, WalletConnect, Azure, Google Cloud, Vercel, CircleCI, GitHub Actions, SQL, NoSQL, K-V Stores, etc.

Francegithub.com/gldywnhello@gldywn.devt.me/gldywn

Work Experiences

Co-founder & Engineer

Napoleon
Node.jsTypeScriptNext.jsExpoVercel
May 2025 – Nov 2025·6 months
Remote
  • Development of the mobile application using React Native and Expo, integrating Apple's Screen Time API to privately monitor usage on user-selected social media apps
  • Design and development of the project's landing page, communicating the unique value proposition and attracting 100+ alpha testers
Related Works
Mobile App for Napoleon
Co-founded Napoleon and developed its mobile MVP, an app that uses financial incentives to help users reduce screen time by leveraging Apple's Screen Time API.
+2

Senior Blockchain & Web3 Engineer

Arianee
SolidityNode.jsTypeScriptAngularGoogle Cloud
Apr 2022 – Mar 2025·3 years
Hybrid
  • Architecture and development of the "Full-Privacy" protocol extension, which enables brands to manage on-chain assets (ERC721) anonymously using ZKPs, intents and a relayer network
  • Development of the Arianee Protocol v2, rearchitecting the entire smart contract suite in a Foundry-based repository, making all contracts upgradable (Transparent Proxy w/ ERC7201), delivering new protocol features, adding 200+ new tests, and adding Foundry support for the "Full-Privacy" extension with `ProverFfiHelper`
  • Development of an NFTs exchange platform for a famous hypermarket brand (offers matching carried out off-chain)
  • Realization of different "crypto e-commerce" solutions in order to onboard major brands in the Web3 space (token gated sales, physical products sales for crypto, NFTs memberships sales for fiat, etc.)
  • Feasibility study and architectural design for Cycle, a next generation DePIN protocol integrating Arbitrum rollup, EigenLayer AVS and Threshold Network (TACo)
Related Works
Protocol v2 for Arianee
Led the migration of Arianee's core smart contracts to a modern, upgradable architecture, introducing new protocol features and implementing the Transparent Pro ...
ZKP-based Full Privacy Protocol Extension for Arianee
Architected and implemented a zero-knowledge privacy layer for the Arianee Protocol, enabling brands to anonymously manage Digital Product Passports (ERC-721) o ...
+3
Protocol Design for Cycle
Led the feasibility study and architectural design for Cycle, a next-generation DePIN protocol integrating EigenLayer, Arbitrum, and Threshold Network for Ether ...
Web3 Storefront for Lacoste UNDW3
Developed a full-stack, token-gated storefront for Lacoste's UNDW3 community, integrating a headless CMS with a crypto payment gateway.
+5
Web3 Loyalty Platform for YSL Beauté
Developed the full-stack Web3 loyalty platform and Solidity smart contracts for YSL Beauté's multi-phased NFT loyalty program, powering a token-gated experience ...
+5
NFT Marketplace for Leader Price Le Club
Developed the Solidity smart contracts and off-chain backend for an NFT exchange, introducing a new layer of gamification and tradability to Le Club Leader Pric ...
+6

Co-founder & Engineer

Zaap.exchange
SolidityNode.jsTypeScriptReactVercel
Sep 2023 – Mar 2024·6 months
Remote
  • Development and deployment of Solidity smart contracts to handle cross chain swap routing, orchestrating a flexible sequence of actions and managing on chain fees, including Permit2 approval, conditional Uniswap swaps, and Stargate bridging
  • Design and implementation of a cross chain routing engine in TypeScript that finds the optimal path by selecting the best bridgeable asset and planning the full sequence from optional source chain swap to the Stargate bridge to an optional destination chain swap
  • Forking and extending the Uniswap interface to make it multi chain and add real time status tracking for cross chain swaps
Related Works
Cross-Chain Swap for Zaap.exchange
Co-founded Zaap.exchange and developed its MVP, a cross-chain swap solution unifying Uniswap and Stargate into a seamless, one-click experience.
+5

Senior Blockchain & Web3 EngineerFreelance

Coord.market
Node.jsTypeScriptNext.jsVercel
Feb 2023 – Jun 2023·4 months
Remote
  • Architecture and development of an Ordinals (Bitcoin NFTs) marketplace enabling non custodial trading via PSBT atomic swaps
  • Integration of Magic Eden `msigner` and the 2-Dummy UTXO algorithm to protect the Ordinal inscription during swaps
Related Works
Ordinals Marketplace for Coord.Market
Developed a full-stack, trustless Bitcoin Ordinals marketplace using an open-source PSBT signing library for secure and non-custodial atomic swaps.
+2

Senior Blockchain & Web3 EngineerFreelance

Kryxivia
SolidityC#ASP.NET CoreAzure
Jan 2022 – Aug 2023·1.5 years
Remote
  • Architecture and development of a backend layer composed of several APIs and background jobs to sync in game and on-chain data via Nethereum, to be consumed by Unity game servers
  • Development, testing and deployment of Solidity smart contracts including Kryxivia NFTs (ERC721), Kryxivia Staking and Kryxivia Loot Boxes (using Chainlink VRF for randomness)
Related Works
Web3 Game for Kryxivia
Developed the core smart contracts and backend services for the Kryxivia Web3 MMORPG, from managing player assets and rewards to the APIs and indexers connectin ...
+5

Senior Full-Stack EngineerFreelance

Navier
C#ASP.NET Core
Oct 2021 – Feb 2022·4 months
Remote
  • Optimization of real time mining monitoring dashboards by refactoring core components and queries to improve load times and responsiveness
  • Restructuring of backend data aggregation services to increase resilience and scalability
Related Works
Mining Dashboard for Navier
Optimized and enhanced real-time data dashboards for Navier's large-scale mining operations, improving the visualization of performance and maintenance metrics.

Senior Full-Stack Engineer

European Society of Cardiology
C#ASP.NET CoreVue.jsAzure
Oct 2019 – Sep 2021·2 years
Hybrid
  • Architecture and development of a high availability virtual congress platform handling 10k+ concurrent users during live events
  • Implementation of several microservices through Azure Functions
  • Development of an on site congress ticketing and badge self printing solution
Related Works
Live Congress Platform for the ESC
Developed a high-availability virtual congress platform for the European Society of Cardiology, built on Vue.js and ASP.NET Core, supporting over 10,000 concurr ...
+6

Back-end Engineer

Air France
JavaC++
Sep 2018 – Sep 2019·1 year
Onsite
  • Reverse engineering of the legacy C++ system and databases to recover business rules, dependencies, and establish migration scope
  • Rebuilding of services in Java EE with a modular architecture and test coverage, within SAFe for validation, integration, and deployment with Air France teams
Related Works
Technical Migration for Air France
Migrated legacy C++ backend services to a modern Java EE stack, preserving critical business logic while improving system reliability and maintainability.

Education

Master MIAGE (INTeNSE)
Campus Sophi@Tech
2016 – 2019
France

Languages

French
Native or Bilingual Proficiency
English
Full Professional Proficiency
Serbian
Elementary Proficiency
Japanese
Elementary Proficiency

Skills

BackendFrontendArchitectureSmart ContractsWeb3MigrationReverse EngineeringScalingDevOpsAgileSAFeOpen Source

Technical Skills

Full Stack
Node.jsTypeScript.NET CoreC#JavaGoReactNext.jsVue.jsAngularLitASP.NET CoreSpring BootExpoXamarin
Blockchain & Web3
SolidityFoundryHardhatEthersWagmiNethereumWalletConnectPrivyDfnsCircom
Cloud & Edge
AzureGoogle CloudVercelFirebaseCloudflareAkamaiK6
Datastores
MongoDBPostgreSQLMSSQLSQLiteOracleRedis
Misc
CircleCIGitHub ActionsAzure DevOpsPrometheusGrafanaDocker

Open Source

Gldywn/hardened-https-agent
A security-first https.Agent for Node.js with advanced certificate validation: Custom CA, Certificate Transparency (CT), OCSP, and CRLSet.
github.com/Gldywn/hardened-https-agent
Gldywn/sct.js
SCT.js is a low-level TypeScript library for Node.js that parses and verifies Signed Certificate Timestamps (SCTs).
github.com/Gldywn/sct.js
Gldywn/crlset.js
CRLSet.js is a lightweight CRLSet parser and verifier in TypeScript for Node.js.
github.com/Gldywn/crlset.js
Gldywn/phala-cloud-oracle-template
This repository is a template for building high-integrity oracles on Phala Cloud with Node.js (Typescript).
github.com/Gldywn/phala-cloud-oracle-template
Arianee/arianee-contracts
This repository is housing the smart contracts powering the Arianee Protocol v2.
github.com/Arianee/arianee-contracts
@arianee/privacy-circuits
This repository contains the circuits and libraries used to generate and verify the proofs of the "Full-Privacy" version of the Arianee protocol.
npmjs.com/@arianee/privacy-circuits