📍 Location: Paris, France
📧 Email: bellamine.seddik@gmail.com
📱 Phone: +33699416914
💼 LinkedIn: in/sbenlamine
🎂 Born: January 29, 1995

Dynamic Full Stack Blockchain Engineer with extensive experience in deploying production-grade blockchain solutions and developing cutting-edge applications. Skilled in TypeScript, Solidity, and Rust, with strong experience in SDK development and building scalable backend and frontend systems. Adept at leveraging Agile methodologies to deliver innovative and efficient solutions in fast-paced environments while championing documentation and user-centered design.

Lyon, France | September 2021 - Present

Key Achievements:

• Represented iExec as a mentor and judge at international Web3 hackathons (ETHLisbon 2022, ETHRome 2024, ETHSofia 2024, ETHBelgrade 2025, ETHRome 2025), providing technical guidance to teams building privacy-preserving and decentralized applications
• Actively participated in company-wide OKRs (Objectives and Key Results), aligning personal contributions with business goals
• Helped shape internal blockchain strategies to drive RLC token adoption

Major Projects:

Migration to Arbitrum:

• Contributed to migrating all development tools to Arbitrum Sepolia and Arbitrum Mainnet

@iexec/web3telegram SDK:

• Led the Engineering of the Web3Telegram SDK in TypeScript, allowing developers to build private telegram messages sending Dapps using TEE (Trusted Execution Environment)
• Led documentation efforts, ensuring ease of adoption and developer integration
• Developed and deployed to production a telegram bot private message sending service in Rust

Privacy Pass Product:

• Led the architecture, technical design, and implementation of PrivacyPass, a product enabling users to monetize the usage of their email addresses (for every email received the user gets rewarded in RLC)
• Scaled PrivacyPass to 45,000+ users, supporting 10+ marketing campaigns
• Developed a NestJS-based metadata categorization API using Postgres, also implemented monitoring using Grafana and setup DB backup
• Contributed to the React Vite frontend on Vercel, optimizing UX/UI and improving frontend performance

@iexec/web3mail SDK:

• Engineered the Web3Mail SDK in TypeScript, allowing developers to build private email sending Dapps using TEE (Trusted Execution Environment)
• Conducted extensive testing to ensure stability before production release
• Led documentation efforts, ensuring ease of adoption and developer integration
• Developed a React-based Web3Mail use case demo, showcasing product capabilities

@iexec/dataprotector SDK:

• Contributed to the Development of the SDK (allowing developers to build Data Protection and governance Dapps) from scratch in TypeScript
• Done feedback-based enhancements and kept it up to date, incorporating robust unit tests and end-to-end tests using Jest
• Integrated the Ethers library for blockchain interactions
• Wrote comprehensive SDK documentation
• Contributed to the sandboxes that showcase the usability of the SDK
• Developed CI/CD pipelines using Drone, then migrated to GitHub Actions

CETIM POC (External Client):

• Designed and implemented smart contracts for CETIM (client POC) using Hardhat, from testing (unit, integration and e2e) to production deployment

Oracle Factory Product:

• Implemented cross-chain interoperability in Oracle Factory v2.0, enabling usage across Polygon, Mainnet, Goerli, and Mumbai
• Transitioned the backend from Spring Boot to NestJS using MongoDB
• Developed and released Oracle Factory v1.3 & v1.4, using ReactJS, Redux Saga (frontend) and Spring Boot (backend)
• Built iExec Material UI-based UI Kit, to be reused for other products

Tunis, Tunisia | November 2020 - September 2021

• Deployed a production-grade Kubernetes blockchain private network on Google Cloud platform
• Contributed to smart contracts development using Solidity
• Contributed to Phygia dApp development using ReactJS

Tunis, Tunisia | February 2020 - September 2020

• Defined project functionalities, actors, workflows, and data structures
• Configured and deployed Hyperledger Fabric blockchain network for eight organizations on AWS EC2
• Developed chaincode in Go Lang and designed API using Express.js for Hyperledger interaction
• Created mobile client application using Flutter for user-friendly access to the system

Software Engineering
Higher Institute of Applied Science and Technology of Sousse
Sousse, Tunisia | August 2018 - July 2019

Specialized Web Development Diploma
Northampton Community College, Bethlehem, Pennsylvania, USA
Thomas Jefferson Scholarship Program | August 2018 - July 2019

Technologies: Hardhat, Foundry, TheGraph, IPFS, Pinata, Ethers, Infura

Database Management: SQL (PostgreSQL, MySQL), NoSQL (MongoDB)

Web Libraries & Tools: ReactJS, Vite, WebPack, Parcel, Rollup, Vercel, Redux, Redux Saga, Cypress, ESLint

Tools & Technologies: Git, Docker, Drone, GitHub Actions CI/CD, npm, Node.js, NestJS, Jest

Methodologies: Agile Scrum

• 🇹🇳 Arabic - Native
• 🇬🇧 English - Proficient (TOEFL score 537)
• 🇫🇷 French - Proficient (TCF B2)
• 🇪🇸 Spanish - Poor

• 🎪 Events organization
• 🎻 Violinist

Feel free to reach out if you'd like to collaborate on blockchain projects or discuss Web3 technologies!

📧 Email: bellamine.seddik@gmail.com
💼 LinkedIn: in/sbenlamine

Last updated: January 2025