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Paul DejeanPD

Paul Dejean

Full Stack Developer Typescript / Rust

€600/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Paul

FullStack Developer for over 7 years, I have worked in large groups and startups to develop web applications in typescript and rust

The skills I can bring you:

Languages: Typescript, Javascript, Rust
Frontend: Next, React, VueJS, Nuxt
Backend: Express, NestJS, Serverless, GraphQL
Testing: Jest
Databases: Mysql, PostgreSQL, MongoDB, Redis
Infra: AWS, GCP, docker, Kubernetes
CICD: GitLab, Github, AWS CodePipeline
  • French

    Native or bilingual

  • English

    Native or bilingual

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

Experience

  • Flowdesk
    Senior Backend Developer
    TECH
    June 2025 - Today (1 year and 2 months)
    Paris, France
    • Opening a new revenue stream for the OTC desk by launching Flowdesk's credit/loan platform in Rust, with full ownership of the backend, from zero to production — now used by over 90 institutional counterparties since its launch in January 2026.
    • As the sole technical lead, isolating the OTC trading platform on a dedicated stack (compute, network, messaging, cache, storage), eliminating the inter-product "blast radius" and protecting institutional flows from upstream incidents.
    • End-to-end implementation of Flowdesk's RFS gateway in TypeScript, including a FIX protocol parser built from scratch, now used by over 10 institutional clients (real-time price streaming and order management).
    • Integrating Flowdesk into Binance's RFQ OTC platform as a market maker, with co-development of the integration's backend services.
    • Expanding exchange coverage in spot and perpetual markets: building the Hyperliquid integration from scratch in Rust within the aggregation engine, contributing to integrations for other major venues (Binance, MEXC, etc.), and working on TWAP and LimitPegged execution strategies.
    Rust Typescript NATS Back-End development DevOps
  • Skeat
    Senior Full Stack Developer
    November 2023 - March 2025 (1 year and 4 months)
    Paris, France
    • Integrating a Point of Sale (POS) API to onboard Skeat's first Belgian client, meeting local market requirements.
    • Developing a mobile money payment integration that enabled onboarding Skeat's first African client.
    • Replacing polling with WebSocket subscriptions across the entire order flow, eliminating update delays and allowing operators to react to incoming orders in real-time.
    • Creating reporting dashboards providing restaurateurs with a comprehensive view of their business: orders, sales, inventory, and payments.
    Typescript React.js MongoDB GraphQL Apache Kafka
  • Monisnap
    Senior Full Stack Developer
    May 2021 - October 2023 (2 years and 5 months)
    Paris, France
    • Redesigning the mobile phone top-up application with Vue.js, TypeScript, and Serverless, reducing purchase errors by 30% and increasing revenue by 50% in two months.
    • Building CI/CD pipelines deploying 30 microservices to ECS, AWS Lambda, and Kubernetes.
    • Implementing Datadog monitoring and alerts across the entire microservice fleet.
    • Contributing to 100% compliance with AWS Security Best Practices v1.0.0 and PCI DSS v3.2.1.
    • Responsible for core payment and subscription microservices: functional scoping and implementation.
    Typescript Vue.js Amazon Web Services (AWS) Serverless

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Education

  • Master of Engineering
    Centrale Lille
    2018
    Master's degree, Engineering

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