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Qiwei H.QH

Qiwei H.

Smart Contract / Blockchain / Crypto

€280/day
1 project
Paris, FR
8-15 years

Average response time: 24 hours

Freelancer profile translated to English.
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About Qiwei

Full-stack developer, CTO of a startup.
- Trading Application developer
- Blockchain developer, NFT project expert
- AR/VR development specialist
- Web/Mobile development expert
- Backend development expert
- Devops development specialist
- AI application development

Originator of an NFT sale of over 120 ETH in the primary market with a secondary market of 297 ETH on Opensea.
  • English

    Fluent

  • Chinese

    Native or bilingual

  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Flowdesk
    FullStack developer
    BANKING AND INSURANCE
    November 2025 - Today (9 months)
    Paris, France
    Designed and implemented core trading infrastructure with a strong focus on risk management, execution, and scalability:
    - Leading the end‑to‑end build and integration of Flowdesk’s market‑making services for Binance OTC RFQ

    - Contributed components of a high‑performance matching engine, including:

    - Order book aggregation and indexing
    - Trade generation and execution
    - Order generation and execution pipelines

    - Order management service implementation

    - Designed and implemented automatic hedging mechanisms to manage market and inventory risk

    - Defined per‑client trading exposure limits with blocking mechanism

    - Contributed to credit and loan management projects

    - Contributed and maintained RFS management workflows
    Blockchain Trading Trading Systems Rust
  • BNP
    Full Stack Blockchain Developer
    BANKING AND INSURANCE
    November 2022 - November 2025 (3 years)
    Pantin, France
    - Develop, test, and deploy Smart Contracts on Ethereum Blockchain and Hyperledger Besu, primarily focusing on creating and managing security tokens.

    - Develop the Cross Chains Swap feature, enabling token exchange between different blockchains.

    - Develop functionalities for encoding and decoding transaction data.

    - Conducted research on rollups and Layer 2 solutions (ZK-rollup and Optimistic rollup).

    - Utilize testing tools like Echidna, Slither, and Mythril for contract testing.

    - Implement a solution for EIP-2771 to send meta-transactions.

    - Test Canton Blockchain, create Templates (Contracts) in DAML.

    - Study and implement Threshold Signature Scheme (MPC, Schnorr, BLS).

    Technical Environment: NodeJs, ethers.js, Hardhat, Chai, Spring Boot, Web3j, Angular, Mythril, Echidna, Slither, DAML
  • Zama
    Hackathon Zama - 1st place
    SOFTWARE PUBLISHING
    July 2024 - September 2024 (2 months)
    Paris, France
    Participation in a Zama Hackathon

    Design and development of the following product:

    T-Rex token protocol integrating FHEVM (Fully Homomorphic Encryption Virtual Machine) technology. This protocol aims to enhance the privacy of token transactions by masking transferred amounts, balances, and the total supply of T-Rex tokens.

    https://github.com/QiteBlock/fhevm-hardhat-t-rex

Reviews

5.0

Out of 1 rating

H

Hz

SCALEX HOLDING

Reviewed on 2/7/2022

Qiwei has all the experience of a CTO who has successfully taken charge of our problem and brought our project to fruition.

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Education

  • Computer Science
    Ensimag
    2017

Certifications

Skill set

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