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Senior Full-Stack Engineer Frontend & Web3

I design, build and ship modern web applications, from system architecture to production, with a focus on frontend and Web3, and AI in the loop, with Claude Code as my pair programmer.

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Holographic portrait of Max Leroux (AI-stylised from his photo)
02 / 06 About

Engineer, end to end

Senior full-stack web engineer with 15+ years of experience designing, building, and shipping modern web applications. I specialize in frontend technologies (TypeScript, SvelteKit, React) and Web3, with a strong backend background and true end-to-end ownership of products, from system architecture to production.

I'm self-taught, a fast learner, and adaptable, with an autonomous working style. I enjoy taking responsibility, ramping up quickly in new environments, and solving complex problems. I bring a strong ownership mindset, care deeply about code quality and performance, and collaborate across teams to turn ideas into reliable, scalable products.

How I work

  • Self-taught
  • Fast learner
  • Adaptable
  • Autonomous
  • Ownership mindset
  • Code quality & performance
Portrait of Max Leroux
ID · Max Leroux

Senior Full-Stack Engineer Frontend & Web3

Geneva · CH
Since 2008 15+

Years designing, building and shipping for the web

5

Years teaching bachelor-level web development

SAE Institute · 2017 – 2022
3+

Years shipping Web3 to production

EverdreamSoft · Bitcoin & EVM

Languages

  • French Native
  • English Proficient

Based in

Geneva

Switzerland

46.20° N · 6.14° E
03 / 06 Skills

The honeycomb

Four clusters, one mindset: pick the right tool, then master it.

01 · 10 cells

Frontend

Modern TypeScript interfaces, component frameworks and interactive graphics.

Hover or select a cell

Also UI/UXResponsive designSEO & performanceBuild toolsUnit & end-to-end testing
02 · 6 cells

Web3

Bitcoin transaction construction and EVM dApp architecture, wallet to contract.

Hover or select a cell

Also Non-custodial flowsOn-chain user flowsToken staking & claimsdApps
03 · 9 cells

Backend & Data

Node.js services, real-time APIs and databases tuned for scale.

Hover or select a cell

Also Large-scale query optimizationProduction architecture
04 · 12 cells

DevOps & AI Tooling

Shipping pipelines, containers, and AI-assisted, agentic development.

Hover or select a cell

Also AI-assisted developmentAgentic coding workflowsFeature-based deliveryTechnical mentoring & code qualityInternal technical documentation
04 / 06 Selected work

Curated projects

Production platforms I designed, built and shipped.

01 / 03 Bitcoin (Counterparty) marketplace

ORBital

Built at EverdreamSoft

A decentralized assets marketplace enabling users to create, buy and sell digital assets secured by the Bitcoin blockchain.

My contributions

Development of the frontend application using Svelte and TailwindCSS and the backend with FeathersJS and MySQL. Integration with Bitcoin using Web3 PSBT transaction flows to mint assets and place or accept orders in a fully non-custodial way.

Scope · Full-stack architecture, frontend, backend, wallet integration, and database performance at scale.

  • Svelte
  • TailwindCSS
  • FeathersJS
  • MySQL
  • Bitcoin
  • Counterparty
  • PSBT
orbital.market
ORBital collection page for Spells of Genesis, with volume, market cap and a grid of card assets.
ORBital buy panel for an asset, showing quantity, price, expiration and Bitcoin fee selection.
02 / 03 Web3 certification protocol

Wakweli

Built at EverdreamSoft

A Web3 certification protocol designed to fight fraud at scale and ensure the authenticity of digital information.

My contributions

Development of the frontend application using Svelte and TailwindCSS. Integration with EVM smart contracts on Base. Implementation of user authentication, certification issuance processes, certificate reviews, staking and claims of $WAKU. Creation of a Chrome browser extension for easy certificate verification.

Scope · Frontend development, API integration, and smart contract interaction.

  • Svelte
  • TailwindCSS
  • EVM
  • Base
  • Smart contracts
  • Chrome extension
mainnet.wakweli.com
Wakweli user pool dashboard with token holdings, claimable rewards and certificates overview.
Wakweli home page: "Protocol of Certification for a Secure Tokenized Future", with latest requests and reviews.
Wakweli certificate details for a Counterparty asset, marked as granted, with locked and guaranty balances.
03 / 03 CRM & invoicing web application

Expensa

Built at nammu.ch

A CRM and invoicing web application for freelancers and small businesses. It allows users to manage clients, create and send invoices, manage stock, and monitor financial reports efficiently.

My contributions

Development of the frontend application using Svelte and TailwindCSS and the backend with FeathersJS and MySQL.

Scope · Full-stack development: business logic, database, user interface, and deployment.

  • Svelte
  • TailwindCSS
  • FeathersJS
  • MySQL
Private application
Expensa invoice editor with reminders, payments and invoice lines (client data blurred).
Expensa client record screen with contact details and the client’s invoice history (client data blurred).
Expensa cash book report for a month, with opening and closing balances and credit entries.
05 / 06 Career

Experience

  1. 11/2022 — 03/2026

    Full-Stack Developer

    EverdreamSoft (opens in a new tab) Geneva, Switzerland

    • Led the design and delivery of full-stack Web and Web3 applications, covering frontend, backend, databases, and production architecture.
    • Built modern frontends with TypeScript (Svelte) and Tailwind CSS, focused on performance, usability, and maintainability.
    • Developed backend services in Node.js (FeathersJS) with REST APIs and WebSocket real-time features.
    • Implemented Bitcoin/Counterparty and EVM integrations: wallet connectivity, transaction flows, UTXO/PSBT signing, and smart contract interactions.
    • Optimized large-scale MySQL databases, improving query performance and overall reliability.
    • Delivered frontend-heavy Web3 features and on-chain user flows for production applications.
    • Contributed to internal tools and public-facing web platforms supporting blockchain-based products.
  2. 09/2017 — 08/2022

    Lecturer / Supervisor

    SAE Institute (opens in a new tab) Geneva, Switzerland

    • Designed and delivered bachelor-level web development courses, covering both frontend and backend fundamentals.
    • Created course materials, practical exercises, and evaluations for PHP (OOP), MySQL, and web application architecture.
    • Taught modern JavaScript frameworks including React and React Native, with a focus on real-world use cases.
    • Delivered backend courses on Node.js, MongoDB, REST API design, and WebSocket-based communication.
    • Supervised student projects from technical design to final delivery, ensuring code quality and architectural consistency.
    • Evaluated student work and provided technical mentoring, guidance on best practices, and professional feedback.
  3. 2008 — 12/2025

    Full-Stack Developer / Independent

    Ran in parallel

    nammu.ch (opens in a new tab) Geneva, Switzerland

    • Co-founded and ran a B2B web development studio, delivering custom digital products.
    • Designed and built end-to-end web applications (frontend, backend, databases), from concept to production.
    • Developed business-oriented platforms and dashboards.
    • Led the full delivery cycle: requirements, architecture, development, deployment, and maintenance.
    • Implemented SEO fundamentals and performance best practices.
    • Worked directly with clients to define needs, deliver solutions, and provide ongoing support.
06 / 06 Contact

Let's build something

Have a product to build, a team to join or a Web3 flow to untangle? Drop me a line.

Open to opportunities Geneva, Switzerland

Looking for a permanent role as Senior Full-Stack or Frontend Engineer, remote or in Geneva.