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Eli FainsteinEF

Eli Fainstein

Supermalter

TypeScript (Next, Nest) and Java Developer

€550/day
3 projects
Tours, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Eli

Developer for 7 years, I specialize in JavaScript/TypeScript and Java. On the front-end, my preferred technologies are React.js and Next.js. On the back-end, Nest.js and Spring.

I have worked in both the private sector (ESN: Open, Apside) and the public sector (Ministry of Ecological Transition, Prime Minister's services).

In a delivery context, I enjoy writing readable and maintainable code to create the best possible product. From a cross-functional perspective, I am committed to quality, both in code principles (tests, TDD, clean architecture) and in collaborative practices (benevolent code reviews, equitable sharing of technical tasks). I am also passionate about the product and the value that code can bring to it, with a pragmatic approach that respects UI/UX.
  • French

    Native or bilingual

  • English

    Fluent

  • Russian

    Native or bilingual

Can work on-site
Tours (up to 10km), Paris (up to 50km)

Experience

  • Freelance
    JavaScript/TypeScript and Java Developer
    January 2023 - Today (3 years and 5 months)
    Paris, France
    I help companies build their products with maintainable code over time ✨

    Front-end, back-end, or full-stack, depending on the company's needs.

    Front-end: Pug, ES6, TypeScript, React, Next
    Back-end: NodeJS, ExpressJS, Java, Spring
    Testing: Jest, JUnit, Mockito
    BDD: PostgreSQL, MongoDB
    TypeScript Node.js SQL MongoDB Java
  • Wonderbly
    Freelance Software Engineer
    July 2023 - September 2023 (2 months)
    London, England, United Kingdom
    Using code to generate wonderful books : https://www.wonderbly.com/pages/personalized-astrology-books

    - ES6, Sass, Pug
    - Implementing quality tests with Jest
    - Passionate about creating delightful storytelling experiences
    Pug Jest ES6 JavaScript English
  • ADEME
    Full Stack TypeScript Developer
    ENVIRONMENTAL
    September 2024 - October 2025 (1 year and 1 month)
    Full Stack Developer | Team of 7

    Building of www.territoiresentransitions.fr, a public service product used by 1200+ collectivities.

    Key responsibilities:
    - Develop and maintain a web application using Next.js for the frontend and Nest.js for the backend
    - Design PostgreSQL database schemas and complex SQL queries
    - Implement comprehensive testing strategies
    - Collaborate closely with team members to deliver features and improvements
    - Participate in code reviews and technical discussions to ensure code quality
    - Work in an agile environment following modern development standards

    Tech stack:
    - Frontend: Next.js, React, TypeScript
    - Backend: Nest.js, Node.js
    - Database: PostgreSQL, SQL
    - Testing: Vitest
    - Cloud: Supabase, Koyeb
    - Version Control: Git
    TypeScript NestJS Next.js PostgreSQL Unit Tests

Recommendations

Frederic ArnouxFA
NV
Frederic Arnoux and 1 other person have recommended Eli

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Education

  • Java - Java EE developer (POEC), Programming
    M2i Formation
    2017
    Java - Java EE developer (POEC), Programming
  • Master's degree, Instructional design
    Université Paul Valéry - Montpellier 3
    2018
    Master's degree, Instructional design

Skill set

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