hello

Lev Kowalski

Fullstack Developer

Fullstack software engineer with a strong interest in problem solving, functionnal programming, test driven development, performance and web accessiblity.

Professional history

  • Nomadic Labs

    ReasonML/Rescript developer
    - Current

    Currently working on tezos wallets within the Umami Core team.

    Mobile wallet

    • Built the mobile app using rescript, React Native and the taquito tezos library.
    • Implemented and forked mobile specific cryptography libs to make Tezos work on mobile.
    • Performance tweaking.
    • Full support for Tez, NFTs and Tokens with multiple standards.
    • NFT galleries, transaction fee simulations.

    Deskop wallet

    • Implementation of a feature that enables batch transactions.
    Stack:
    • ReasonML -
    • Rescript -
    • OCaml -
    • React Native

  • Anotherbrain

    Front End Developer
    -

    Built the UI for Phophor, a quality control solution based on image analysis by AI.

    Used React, Material UI and Canvas API for defect annotation on images.

    • Implementation of quality control scenarios with real time feedback.
    • Charts and dashboards to summarize inspection reports.
    • Performace optimizations with the React profiler.
    • Unit testing with React Testing Library and accessibility roles.
    Stack:
    • React -
    • Node -
    • React testing library -
    • Material-UI -
    • Python -
    • PyTorch

  • Kering

    Full Stack Developer
    -

    Worked on numerous projects for Kering IT.

    PayByLink

    • An in store payment solution for Kering brands that uses React, Node and Cybersource APIs.
    • The app updates the stock warehouse with product sales and availiblity.
    • App in

    ERP

    • Built a custom ERP for price and product info administration.
    • Updates transit to the Salesforce front ends through Kafka.
    • Used React, Node and Postgres.
    • Implemented dashboards with the ELK stack for production monitoring.
    Stack:
    • React -
    • Jest -
    • Enzyme -
    • Node -
    • NestJS -
    • Typescript -
    • AWS -
    • SQS -
    • Kibana -
    • ELK -
    • ECS -
    • Terraform -
    • Postgres -
    • MongoDB

  • Neurochain

    Full Stack Developer
    -

    Buit an MVP for product traceability using React and IBM Hyperledger blockchain in the backend.

    • The product demos product tracing in a supply chain.
    • Use of Hyperledger as an imutable database.
    • Product origin certification documents generated and then saved in IPFS with it's hash saved in Ethereum.
    • OAuth authentication for diffrent user roles.
    Stack:
    • React -
    • Node -
    • Jest -
    • Typescript -
    • Emotion -
    • Hyperledger -
    • Ethereum

  • Publicis

    Front End Developer
    -

    Workd on a Front end application for food retail firm Intermarché.

    • Product forms
    • Store locator
    • Payment funnel
    • Storybook component inventory
    • CSS design
    • Headless CMS for adevertisemnt campains
    Stack:
    • React -
    • Node -
    • SASS -
    • Contentfull

  • Santech

    Front End Developer
    -

    Built a front end for a CMS used by Mondial Assistance France, an inssurance company, using Angular.

    The app enables administrators to manage client contracts and services.

    Css design.

    Stack:
    • Angular -
    • SASS -
    • Java -
    • Spring Boot

  • Kelly Deli

    Full Stack Developer
    -

    Application for in store sales of food products.

    The app enables real time stock and sales tracking in stores as well as production planning.

    Stack:
    • Angular -
    • Typescript -
    • Node -
    • MongoDB -
    • GraphQL -
    • MQTT

  • M6 GROUPE

    Software Developer
    -

    Within the IT department of M6 media group, worked on projets infrastrucure and business related.

    Built an Angular application to consult advertisement prices and audiences.

    Wrote Perl scripts for triggering and reporting the status of jobs accross production servers.

    Stack:
    • Angular 1 -
    • Python -
    • Bootstrap -
    • JBoss -
    • Tomcat

  • Chambre de Commerce et d’Industrie, Paris

    Web Developer
    -

    Developped features and maintained the sites of the French Chamber of Commerce (PHP, Drupal, Wordress).

    Stack:
    • CSS -
    • HTML -
    • Javascript -
    • Webtrends

  • BULL (ATOS)

    Systems Engineer
    -

    UNIX Systems administration.

    Shell Scripting.

    Stack:
    • AIX -
    • SHELL

Education

Institut Supérieur d'Electronique de Paris
Engineer's degree 2008
Computer Science
University Pierre et Marie Curie
Bachelor of Science 2007
Theoretical Physics
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