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Jérémy Combe

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Building scalable and reliable web applications.From the mountains of Savoie, France.

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// About Me

Passionate about
building great software

Born and raised in the mountains of Savoie, France, I've always been drawn to solving complex challenges. My journey into tech started early and led me through diverse experiences across France, Canada, and Switzerland.

I specialize in full-stack development — from backend architecture and DevOps to polished frontend interfaces. I love building robust systems that scale and deliver real value.

When I'm not coding, you'll find me contributing to open-source projects, exploring new technologies, or hiking in the Alps.

10
Years Coding
4+
Years Contract Work

// Current Role

Active

Claynosaurz / Popkins

Working full-time as a Full Stack Developer at Otomoro on Claynosaurz, a digital entertainment franchise blending world-class animation, gaming, and merchandise with emerging blockchain technology. Originally built on Solana, the team also launched Popkins on the Sui blockchain.

otomoro.comcollect.claynosaurz.com

Achievement System — 40k+ Users

Built an NFT badge achievement system across Solana and Sui collections. Badges are evaluated via a node-based engine analyzing NFT attributes per user. Also built a Solana indexer to track collection events in real time (sales, transfers, burns, minting).

Infra, DevOps & Caching

Designed infrastructure with CI/CD pipelines, Redis caching, and Docker. Built monitoring with Prometheus, InfluxDB & Grafana.

Payments & Auth

Integrated card payments via onramp providers with gas sponsoring for seamless UX. Secured API with Dynamic XYZ authentication.

Performance Testing

Conducted load testing with K6 and Grafana dashboards to ensure scalability under high traffic during mint events.

// Tech Stack

Tools & Technologies

{ }

Languages

TypeScriptSolidityPythonC
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Frontend

React.jsNext.jsHTML/CSSTailwind
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Backend

Node.jsExpressREST APIsGraphQL
db

Databases

PostgreSQLMongoDBInfluxDBTypeORMDrizzle
0x

Blockchain

SolidityEthers.jsHardhatDeFi
ops

DevOps

GitCI/CDTerraformGrafanaDocker
AI

AI

ClaudeMCP ServersLLM APIsFigma MCPPlaywright MCP
app

Software & Tools

VS CodeFigmaPlaywrightVitestJestK6

// Career Path

Work Experience

NOW
Contract

Full Stack Developer

Active

Otomoro — Client: Claynosaurz / Popkins

Jul 2025 - Present

Lyon, France

Otomoro is a web agency. Claynosaurz is a digital collectibles and gaming brand originally built on Solana with 40k+ active users. The team also created Popkins, a new collection on the Sui blockchain.

  • Built an achievement system serving 40k+ users — badges minted as NFTs on Sui, evaluated via a node-based engine analyzing NFT attributes per user
  • Designed and built infrastructure: DevOps, CI/CD pipelines, Redis caching system for performance optimization
  • Developed a secured API with Dynamic XYZ authentication system
  • Integrated card payment via Coinflow interacting with a Seedplex smart contract for fundraising, and managed gas sponsoring for seamless UX
  • Built a monitoring stack with Prometheus, InfluxDB, and Grafana dashboards
  • Conducted performance testing with K6 and Grafana to ensure scalability under load
  • Developed a Solana indexer with Helius to read and decode on-chain transactions, updating parsed data in the database in real time
  • Collaborated with a remote team based in Romania for Sui smart contract development
TypeScriptNext.jsSolanaSuiRedisPrometheusGrafanaK6Dynamic XYZDockerCI/CDClaude CodePlaywrightFigma MCP
OtomoroClaynosaurz
2024
Contract

Full Stack Developer

Smardex / RA2Tech

Apr 2024 - Jul 2024

Montreux, Switzerland

Smardex is a decentralized exchange protocol. RA2Tech is the development company behind it, based in Switzerland.

  • Web application to analyze smart contract transactions and integrate a swap module for ERC20 tokens using Next.js, Docker, TypeScript, PostgreSQL, SSL/HTTPS
  • Updated libraries Viem 1.0 to 2.0 for Smardex alert package
  • Monitoring ETH/USD price with two oracle APIs (Pyth & Redstone) using Docker Compose, InfluxDB, Grafana, TypeScript, Node.js
  • Extracted data from InfluxDB to display with uChart in Next.js
  • CI/CD pipelines, Git workflow, pull requests, AWS LightSail, OpenTofu (Terraform)
Next.jsTypeScriptDockerPostgreSQLInfluxDBGrafanaAWSTerraform
RA2TechSmardex
2020
Contract

Backend Developer

Rebrain.ai

Oct 2020 - Apr 2023

Lyon, France

Fintech startup specializing in algorithmic trading and data analysis for cryptocurrency markets.

  • Built from scratch a unified trading library (similar to CCXT) in Node.js & TypeScript, connecting multiple centralized exchanges via REST & WebSocket to simplify and standardize order execution across platforms for trading signals
  • Proof of concept flash-loan strategies using Solidity and Node.js (Aave, Uniswap, SushiSwap, OpenSea)
  • Monitoring trading bots (EC2 AWS) and blockchain data — analysis of token volumes, prices, circulation, and tweets using InfluxDB & Grafana
  • Supervised an intern and managed pull requests
  • Setup JavaScript test suites with Jest
Node.jsTypeScriptSolidityAWS EC2InfluxDBGrafanaJest
Rebrain.ai
2020
Internship

Backend Developer

Pockero

Apr 2020 - Jul 2020

Montreal, Canada

Canadian startup building a task-reward platform with blockchain-based incentives.

  • Created smart contracts using Solidity (Ethereum) and C++ (EOS) to generate ERC20 tokens for the reward system
  • Built additional smart contracts to record completed task information on-chain
  • Developed an API-REST using Express and Firebase
  • Created a Node.js script to retrieve application data via smart contracts
  • Participated in a crypto EOS event in Montreal
SolidityC++EOSExpressFirebaseNode.js
2017
Education

Student — Software Engineering

42 Lyon

Oct 2017 - Oct 2020

Lyon, France

  • Peer-to-peer learning methodology with no formal teachers or classes
  • Intensive projects in C, C++, algorithms, networking, and web development
  • Completed internship at Pockero (Montreal) as part of the curriculum
CC++AlgorithmsUnixNetworkingWeb
42 Lyon
2017
Internship

Android Developer

Solti

Jan 2017 - Mar 2017

Grenoble, France

Software company specializing in inventory management and traceability solutions for businesses.

  • Developed a Java Android application (SoltiScan) for inventory management using QR code scanning
  • Application still actively used in production today
  • Ensured data transfer to a database or email post-process
  • Created a tutorial video for the application on YouTube
  • Worked autonomously on the full project lifecycle
JavaAndroidQR CodeMobile
SoltiSoltiScan (Play Store)
2016
Internship

Web Developer

Merci Creative

May 2016 - Jun 2016

Bourg Saint Maurice, France

Digital creative agency building websites and branding for local businesses in the Alps region.

  • Created a landing page for a catering client using HTML, CSS, and Apache PHP
  • Participated in pair programming sessions with the team
HTML/CSSPHPApache
Merci Creative
2015
Education

BTS SIO — Option Développement

Lycée

Sep 2015 - Jul 2017

France

  • Two-year technical diploma in IT services, specializing in software development
  • Completed internships at Merci Creative and Solti during the curriculum
JavaSQLHTML/CSSPHPAlgorithms

// Selected Work

Personal Projects

Current ProjectIn Progress

Past Projects

Decentralized GeoGuessr

On-chain GeoGuessr game using Fully Homomorphic Encryption (FHE) for privacy-preserving gameplay. Smart contract logic ensures fair play without revealing answers.

SolidityNext.jsFHEFhevm
GitHubDocs

Flashloan Trading NFT

Automated arbitrage bot leveraging flash loans to exploit price differences between SudoSwap and OpenSea NFT marketplaces.

SolidityEthers.jsFlash LoansDeFi
GitHub
View all projects on GitHub

// Contact

Let's Work Together

Got a project in mind? I'm always open to discussing new opportunities, creative ideas, or potential collaborations.

Say Hello