hello

Lev Kowalski

Fullstack Developer

Software engineer with a strong interest in problem solving, functional programming, test driven development, performance and web accessibility.

Professional history

  • Nomadic Labs

    Front End Developer
    - Current

    Currently working on Tezos wallets within the Umami core team.

    • Built a Tezos wallet for iOS/Android using Rescript and React Native (Umami Tezos on iOS app store).
    • Implemented NFT galleries, transaction simulations, transaction history, Tezos domains, Tezos profiles, support for tokens with multiple standards.
    • Implemented new features on the Desktop application, namely transaction batching.
    Stack:
    • ReasonML -
    • Rescript -
    • OCaml -
    • React Native

  • Anotherbrain

    Front End Developer
    -

    Built the UI for PHOSPHOR®, a quality control solution powered by AI image analysis performed by a Python backend.

    • Used React and Canvas API to build a user interface that runs QC scenarios and enables users to draw annotations on images.
    • Implemented quality control scenarios with real time feedback.
    • Charts and dashboards to summarize recorded inspections.
    • Performance optimizations with React profiling tools.
    • Built a robust test harness with React Testing Library and accessibility roles.
    Stack:
    • React -
    • Node -
    • React testing library -
    • Material-UI -
    • Python -
    • PyTorch

  • Kering

    Full Stack Developer
    -

    Worked on projects for Kering IT with worldwide scaling. Built an in store payment solution for Kering brands that is deployed on tablets in physical stores (Saint Laurent, AMQ…).

    • Payment is done through Cybersource APIs
    • Item stock queries and updates are done with through OMS APIs (Manhattan Order Management).

    Built a pricing solution that enables brand sales administrators to edit item prices and create sales campaigns.

    • Price updates transit to SalesForce front ends through Kafka.
    • Implemented prod monitoring Kibana Dashboards.
    Stack:
    • React -
    • Jest -
    • Enzyme -
    • Node -
    • NestJS -
    • Typescript -
    • AWS -
    • SQS -
    • Kibana -
    • ELK -
    • ECS -
    • Terraform -
    • Postgres -
    • MongoDB

  • Neurochain

    Full Stack Developer
    -

    Built an MVP for product traceability in supply chains using React and IBM Hyperledger blockchain.

    • Enables viewing the detailed course of products from the factory to retail stores.
    • Uses Hyperledger as an immutable database.
    • Product origin certification documents generated and then saved in IPFS with their hash saved in Ethereum.
    • OAuth authentication for different users roles.
    Stack:
    • React -
    • Node -
    • Jest -
    • Typescript -
    • Emotion -
    • Hyperledger -
    • Ethereum

  • Publicis

    Front End Developer
    -

    Worked on the Front End of food retail firm Intermarché's new online store.

    • Collaborated with stakeholders during development processes to confirm creative proposals and design best practices.
    • Built eCommerce elements such as a store locator, a payment funnel and product descriptions forms.
    • Worked with designers using Figma and a Storybook component catalog.
    • Integrated a headless CMS for advertisement campaigns.
    Stack:
    • React -
    • Node -
    • SASS -
    • Contentfull

  • Santech

    Front End Developer
    -

    Built a front end CMS for insurance company Mondial Assistance France using the Angular Framework.

    The application enables administrators to manage client insurance contracts and services.

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

  • Kelly Deli

    Full Stack Developer
    -

    Worked on a food stock management application used in store by vendors.

    • Enables real time stock and sales tracking as well as production planning.
    • Use of MQTT to allow the front ends to operate through low reliability network connections.
    Stack:
    • Angular -
    • Typescript -
    • Node -
    • MongoDB -
    • GraphQL -
    • MQTT

  • M6 GROUPE

    Software Developer
    -

    Within the IT department of M6 media group, worked on projects infrastructure and business related.

    • Built an Angular application to consult advertisement prices and audiences.
    • Wrote Perl scripts for triggering and reporting the status of jobs across production servers.
    Stack:
    • Angular 1 -
    • Python -
    • Bootstrap -
    • JBoss -
    • Tomcat

  • Chambre de Commerce et d’Industrie, Paris

    Web Developer
    -
    • Developed features and maintained the sites of the French Chamber of Commerce (PHP, Drupal, WordPress).
    • Provided front end website development using WordPress, Drupal and other editing software.
    • Adhered to SEO best practices while designing sites.
    • Oversaw technical issues and troubleshooting requests to resolve user problems.
    Stack:
    • CSS -
    • HTML -
    • Javascript -
    • Webtrends

  • BULL (ATOS)

    Systems Engineer
    -
    • Shell scripting and UNIX systems administration.
    • Optimized networked software and operating systems by applying updates and patches.
    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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