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François K.FK

François K.

Trading • Crypto • Dex / Exchange • Tradingview

€450/day
Lille, FR
15+ years
Trading
TradingView
Exchange
Cryptocurrency
Crypto

Average response time: 1 hour

Freelancer profile translated to English.
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About François

Software architect specialized in Trading, Crypto, and financial platforms.

For over 15 years, I have been supporting the design and evolution of platforms with high constraints on performance, availability, and security.

I work on topics related to crypto exchanges, trading platforms, market API integration, strategy automation, analysis tools, and real-time financial data exploitation.

My expertise notably covers:

• Development of Trading & Exchange platforms
• Integration of Binance, Bybit, Kraken, Coinbase, OKX, etc. APIs
• TradingView, Pine Script, and automated alert systems
• Trading bots and algorithmic execution
• Cloud & high availability architecture
• Security, DevSecOps, and observability
• Real-time processing and low-latency systems

I support both Web3 startups and companies wishing to develop or industrialize their products related to trading and digital assets.
Banking and Financial Services
Digital and IT Services
Facility Services and Security

  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Lille (up to 50km), Paris (up to 50km)

Experience

  • UAB Palanteer
    Lead Full Stack Developer — Crypto Fintech Infrastructure
    PRIVATE EQUITY
    January 2023 - May 2026 (3 years and 4 months)
    Lille, France
    Design and development of acloud-native and microservices-oriented crypto fintechinfrastructure in a highly secure and regulated environment (VASP Lithuania).

    Development of a modern serverless architecture with a strong focus on security, scalability, and regulatory compliance.

    Key responsibilities:
    - Cloud architecture andmicroservicesdesign for the platform
    - Frontend development with Nuxt.js
    - Development ofserverless APIs with AWS Lambda, API Gateway, and CloudFormation
    - Development of Node.js backend tools forfintech and cryptooperations
    - Integration of VASP regulatory requirements: audit trail, KYC, AML reporting, and operational security
    - Implementation of monitoring and error detection systems withSentry, AWS CloudWatch, and AWS X-Ray
    - Securing client funds and treasury viaFireblocksand cold wallets
    - Development of automated trading strategies and automated fund deployment to various strategies
    - Collaboration with a small technical team in a full remote environment and agile organization

    Technical environment:
    AWS Lambda, API Gateway, CloudFormation, Node.js, Nuxt.js, microservices, serverless, DevSecOps, fintech, crypto, monitoring, CI/CD.
    Node.js Amazon Web Services DevSecOps Agile methodology Microservices
  • Doji Finance Limited
    Senior Lead Developer — Fintech & Automated Trading
    PRIVATE EQUITY
    January 2020 - December 2022 (2 years and 11 months)
    Hong Kong, Hong Kong SAR China
    Evolution of a legacy fintech SaaS platform towards modern cloud architectures focused on automation, crypto trading, and real-time processing.

    Key responsibilities:
    • Progressive migration of legacy systems to Node.js and modern cloud architectures
    • Integration of APIs from major crypto exchanges: Binance, Bitfinex, FTX, Kraken, etc.
    • Development of automated trading systems and secure management of client funds
    • Integration of Stripe for payment and subscription management
    • Implementation of CI/CD pipelines with GitHub Actions
    • Deployment and improvement of DevOps / DevSecOps practices
    • Service monitoring, observability, and application performance improvement
    • Management and coordination of a small team of developers in a full remote setting
    • Agile organization: sprint planning, daily meetings, technical roadmap, code reviews, and product tracking

    Technical environment:

    Node.js, REST/WebSocket APIs, GitHub Actions, CI/CD, AWS, DevOps, DevSecOps, Stripe, fintech, crypto exchanges, monitoring.
    Node.js DevSecOps Github Actions Stripe
  • Doji Finance Limited
    Lead Full Stack Developer — Real-time Trading Platform
    EDUCATION AND E-LEARNING
    January 2016 - December 2020 (4 years and 11 months)
    Hong Kong, Hong Kong SAR China
    Development of a real-time community platform for traders with advanced collaborative features: messaging, audio/video, and screen sharing.

    The platform was used for several years by several thousand users before a gradual migration to Discord.

    Key responsibilities:
    • Development of a real-time multi-user trading room
    • Implementation of real-time messaging systems based on WebSockets
    • Development of audio/video rooms and screen sharing with Janus WebRTC Server
    • Optimization of real-time performance and infrastructure stability
    • Significant work on UX and user workflows
    • Technical leadership of a small agile team in a full remote environment

    Technical environment:
    WebRTC, Janus WebRTC Server, WebSockets, Node.js, real-time, SaaS, UX/UI, scalable architectures.
    WebRTC Websocket Agile methodology Tech Lead Amazon Web Services
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Education

  • Bachelor's degree in Mathematics and Computer Science
    Université de Lille
    2007
    Licence Mathématiques et informatique

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