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Nezzar K.NK

Nezzar K.

Fullstack Dev

€450/day
9 projects
Toulouse, FR
8-15 years
React Native
React.js
Web3
Solidity

Average response time: 1 hour

Freelancer profile translated to English.
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About Nezzar

Full-Stack Developer: React, Next.js, Node.js, TypeScript

Developer with 8 years of experience, specializing in the design of complete web applications: React/Next.js/TypeScript frontends, Node.js backends, databases, and third-party integrations. I work across the entire chain, from technical scoping to production deployment, with complementary expertise in onchain applications (Solidity smart contracts, indexing, SDKs).

My background combines startups (Theodo, Sismo), freelancing (Peanut Protocol, Superfluid), and entrepreneurship. I have designed and delivered complete web applications, payment systems, business dashboards, and blockchain protocols in production.

Strengths:

  • End-to-end Full-stack: frontend, backend, database, API, SDK, MCP
  • Software Architecture: design of robust systems, integration of third-party services and protocols
  • End-to-end autonomy, from technical scoping to production deployment
  • Rigorous about code quality, pragmatic about deadlines
  • Clear communication, accustomed to working with non-technical profiles
  • Quick ramp-up on new environments and stacks
  • Team and solo experience, comfortable working remotely
  • Complementary specialty: onchain development (Solidity, Foundry, proxies/factories/beacon, The Graph)


**Stack**: React, TypeScript, Next.js, Node.js, PostgreSQL. Web3 side: Solidity, Foundry, The Graph, Viem, Wagmi


Based in Toulouse, available remotely or hybrid. I am looking for missions where I can quickly add value: web application development, MVPs, technical refactoring, blockchain integration, or team reinforcement.
Air Transportation and Tourism
Biotechnologies
Health and Wellness
Aerospace
Large Retailers

  • English

    Native or bilingual

  • French

    Native or bilingual

Can work on-site
Toulouse (up to 10km)

Experience

  • Superfluid
    Fullstack Developer
    SOFTWARE PUBLISHING
    January 2024 - December 2025 (1 year and 11 months)
    Toulouse, France
    Superfluid: Full-Stack Developer (Freelance)

    Overall effort to improve the Developer Experience around ERC20 streaming via Superfluid: SDK development, data dashboard setup, and technical documentation writing.

    Internal development of a Farcaster application.

    As part of the Frontier Guild (incentive program), design and delivery of full-stack blockchain applications: smart contracts and complete applications covering web, backend, and SDK.
    Ethereum Next.js Blockchain Expo Solidity
  • Futures Factory
    Blockchain Developer
    SOFTWARE PUBLISHING
    May 2022 - June 2023 (1 year and 1 month)
    Paris, France
    Futures Factory: Lead Developer

    • Design and deployment of an onchain reputation system.
    • Development and production deployment of 3D asset collectibles (smart contracts and frontend).
    • Integration of interactive 3D model display in an onchain marketplace.
    • Technical leadership of the team and architectural choices.
    Typescript Solidity Next.js Node.js Google cloud
  • SISMO
    Fullstack Developer
    SOFTWARE PUBLISHING
    October 2021 - April 2022 (7 months)
    Paris, France
    Development & design of applications communicating with smart contracts on the Ethereum blockchain. Subgraph deployment.
    Typescript Node.js React.js Blockchain Ethereum
Check out Nezzar's experience

Reviews

5.0

Out of 3 ratings

H

Hadrien

ABL

Reviewed on 10/20/2021

Nezzar completed his mission with quality and autonomy. It was a pleasure working with him.
M

Matthieu

Theodo

Reviewed on 1/19/2021

We worked with Nezzar on a long-term mission in agile mode using React / Typescript and Serverless technologies. Nezzar brought his expertise in React and delivered the frontend features on time and to the quality standards set by the team. Nezzar also quickly ramped up on the backend and delivery methodologies (scrum, git flow, etc.). Nezzar is focused, attentive, and very humble; we would definitely hire him again for future missions.
Show all 3 reviews

Recommendations

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Former user and 2 other people have recommended Nezzar

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Education

  • Software Engineer
    Wild Code School
    2018
  • Health Biology License
    Catholic University of Lille
    2015
Check out Nezzar's education

Skill set

Ethereum
Expo
Amazon Web Services
AWS Amplify
Node.js
redux
Serverless
JavaScript
MongoDB
Express
CSS3
Flutter
Graphql
Typescript
Subgraph Dev
Next.js
Fullstack
Vercel
React Testing Library
Redux.js
styled-component
Appolo
Jest
Chai
NFT
Smart Contract
Viem
EVM
Blockchain
Google cloud

Categories