Mathieu Bertin

Full Stack Developer

with 10+ years of development experience and exactly 0 professional design experience.

  1. Github
  2. LinkedIn

Technologies

  1. TypeScript logoTypescript
  2. Solidity
  3. PostgreSQL logoPostgresql
  4. Nextjs
  5. React LogoReact
  6. Nuxtjs
  7. Vuejs
  8. Tailwindcss

I make web3/blockchain

web applications

entirely from scratch.

Meaning I can provide value at every level of making a web application for your web3/blockchain business.

  1. Database Architecture Icon

    Database architecture and implementation.

  2. Smart Contract Icon

    Smart Contract auditing, development and deployment.

  3. Backend Systems Icon

    Developing backend services or designing intuitive RESTful APIs.

  4. React Logo

    Building beautiful, responsive, and performant frontends.

I've made token dashboards

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**Some of these project urls are not production deployments and may be moved, be partially broken, or completely down. Please notify me if you find any issues.**

Recent Work Experience

Senior Full Stack Web3 Developer

APACX · Remote [June 2025 – Current]

Tech utilized:

  1. TypeScript logoTypescript
  2. Hardhat Logo
  3. Nextjs
  4. PostgreSQL logoPostgresql
  5. Tailwindcss
  6. AWS Logo
  7. Vercel
  8. Solidity

Key Achievements

  1. Integrated Xave's Balancer V2 based FX Pools to the platform allowing our users to swap from PHT to USDT/USDC/XSGD with minimal slippage.
  2. Combined all of the repos to a single mono-repo with Turbo which enabled to share a lot of components and configuration, cutting down on a lot of duplication and dev time on maintenance.
  3. Opted for Dune.com instead of Subgraph which led to finishing our analytics and transparency page in 2 weeks when the latter was already on track to taking a month+.
  4. Immediately pushed for linting and formatting with prettier before commit with Husky leading to cleaner more maintainable code.

Senior Full Stack React/Web3 Developer

Balthazar DAO · Full-time [May 2024 - Present]

Tech utilized:

  1. TypeScript logoTypescript
  2. Hardhat Logo
  3. Nextjs
  4. PostgreSQL logoPostgresql
  5. Tailwindcss
  6. AWS Logo
  7. Vercel
  8. Solidity

Responsibilities

  1. Established immediately as a senior developer, acting as the main PR reviewer ensuring code quality for the entire organization.
  2. Wrote the frontend for our rewards platform from scratch and chose a Next.js, Tailwind, shadcn, wagmi, tanstack/query tech stack.
  3. Wrote, reviewed, and deployed solidity smart contracts for staking, governance, and vesting functionalities.
  4. Integrated these contracts with the frontend using viem, wagmi, and dynamic.xyz.
  5. Identified bottlenecks that could be solved with advanced blockchain indexing tools such as TheGraph, Dune.com, Goldsky, and Subsquid, eventually deciding on the latter.

Full Stack Web Developer

xx network · Full-time [Apr 2019 - Aug 2023]

The first and only quantum-resistant and privacy-focused blockchain ecosystem.

Urls

Tech utilized:

  1. TypeScript logoTypescript
  2. Javascript
  3. Nextjs
  4. Nuxtjs
  5. PostgreSQL logoPostgresql
  6. Tailwindcss
  7. Contentful LogoContentful
  8. AWS Logo
  9. Express Logo
  10. GraphQL LogoGraphQL

Responsibilities

  1. Designed a website integrated with Contentful CMS in Nuxt.js (Vue.js), enabling the marketing team to maintain consistent branding while posting promotional content.
  2. Engineered a dashboard using Nuxt.js (Vue.js), Express, and PostgreSQL to display performance metrics based on a database of approximately 200 million rounds.
  3. Provided 150+ node operators with essential support and comprehensive performance insights: https://dashboard.xx.network/
  4. Developed software allowing 300+ end-users to interact with the product, enabling them to utilize the company's financial services: https://wallet.xx.network/
  5. Created a messenger application using Typescript/React and in-house library XXDK, expanding access to private messaging and group chats for 500+ users: https://github.com/xxfoundation/elixxir-speakeasy-web/tree/dev