You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Hela Ben KhalfallahHB

Hela Ben Khalfallah

IT Tech Lead

€600/day
Paris, FR
15+ years

Average response time: 1 hour

About Hela

I help organizations modernize and scale complex frontend ecosystems.

With 15+ years of experience, I work in production-critical environments (monorepos, multi-application platforms, CI/CD pipelines) to:
• Redesign frontend architectures (React, TypeScript, Next.js)
• Stabilize and optimize build systems (Vite, Webpack, Turbo, Nx)
• Rationalize and secure dependency management
• Lead incremental migration strategies (without risky rewrites)
• Institutionalize engineering quality: strict TypeScript, unified testing, static analysis, internal tooling


My approach favors structured evolution over abrupt transformation.

The goal: reduce technical entropy, improve developer productivity, and increase platform reliability at scale.

Core expertise:
React 16–18+, TypeScript (strict), Next.js 13+, Redux, TanStack Query, GraphQL
Vite, Vitest, Jest, ESLint, pnpm, monorepo tooling
Frontend architecture, FrontendOps, performance optimization, engineering governance

I can operate both hands-on and at strategic level: leading architecture decisions, mentoring engineers, and defining scalable technical standards.

Links:
  • French

    Native or bilingual

  • English

    Fluent

  • Arabic

    Native or bilingual

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

Experience

  • OVHcloud
    IT TECHNICAL LEAD
    TELECOMMUNICATIONS
    March 2025 - Today (1 year and 3 months)
    Porte de Clichy, Paris, France
    Led large-scale modernization of the OVHcloud Manager monorepo, a multi-application frontend ecosystem supporting Public Cloud, Bare Metal Cloud, Web Cloud, Telecom, and Hosted Private Cloud products.

    Monorepo & Dependency Architecture
    Led incremental migration of dozens of applications from Yarn to PNPM in a production-critical environment. Designed a hybrid package strategy enabling zero-downtime adoption. Built internal CLI and CI automation to scale migrations. Stabilized dependency graphs and lockfile integrity.

    Build Systems & CI Orchestration
    Re-architected task execution using Turbo/Nx incremental, cacheable pipelines. Reduced redundant CI work by attaching lint, test, and build processes to deterministic dependency graphs. Resolved concurrency bottlenecks and flaky GitHub Actions workflows. Consolidated fragmented pipelines into unified meta-check systems.

    Engineering Quality Platform
    Designed a centralized static analysis platform adopted across teams. Enforced TypeScript strict mode by default. Introduced type coverage, dependency analysis, duplication detection, bundle and accessibility checks. Integrated automated quality reporting into CI workflows.

    Developer Platform & Tooling
    Built reusable internal platforms: migration automation frameworks, shared Vite/Vitest configurations, unified test setup, and centralized static analysis tooling, enabling safer refactors, faster onboarding, and architectural consistency.

    Frontend Architecture Improvements
    Migrated routing from a JSON-driven system to a component-based architecture (lazy loading + Suspense). Modernized SWC, Vite, and Vitest infrastructure. Standardized React architecture and testing strategies.

    Impact
    Increased build determinism and CI stability. Institutionalized strict typing and quality governance at scale. Improved developer productivity through incremental, cacheable workflows. Established reusable engineering platforms supporting scalable growth.
    Architecture logicielle React.js FrontendOps Node.js DevTools
  • Ekino-Pantin-CDI
    Senior Frontend Expert
    TELECOMMUNICATIONS
    May 2024 - March 2025 (10 months)
    Pantin, France
    Frontend Platform & Tooling
    Designed and implemented internal project tracking tool (phTool) to provide visibility into project health, delivery status, and engineering progress.
    Built a code generator framework to standardize project scaffolding, enforce architectural conventions, and reduce setup time.
    Designed and deployed a framework centralizing linting, TypeScript configuration, dependency checks, and quality enforcement across teams.
    Established consistent frontend architecture standards and reusable configurations.

    Architecture & System Design
    Defined scalable frontend architectures (React, TypeScript, state management patterns).
    Led technical design decisions, balancing maintainability, performance, and scalability.
    Introduced modularization and clean architecture principles across projects.
    Contributed to performance optimization and bundle size reduction strategies.

    Developer Experience & Engineering Culture
    Acted as FrontendOps Engineer, improving build workflows, tooling reliability, and CI integration.
    Mentored developers on clean code, design patterns, and scalable frontend systems.
    Conducted code reviews and architectural reviews to raise engineering standards.
    Promoted knowledge sharing through internal sessions and technical discussions.

    Links:
    FrontendOps Software Craftsmanship Architecture logicielle React.js Développement Front-End
  • Société Générale - Fontenay-sous-Bois - CDI
    Web Solutions Engineer | Software Architect | Lead Dev
    BANKING AND INSURANCE
    December 2018 - May 2024 (5 years and 5 months)
    Paris, France
    Missions
    • Web Solutions Engineer
    • Software Architect
    • Senior Web Developer
    • Frontend Operations (FrontendOps) Engineer
    • Frontend Expert
    • Lead Web Developer
    • Software Craftsman

    Key Skills & Experience
    • Technical Design, Architecture & Development
    • Frontend Operations FrontendOps (Tooling, CLI, Generators, Performances Optimisation, Support)
    • UI Component Library Development
    • Design System Contribution
    • Technical Documentation & Code Review
    • Developer Culture & Mentorship
    • Community Building (React & JS)
    • Technology Watch & Learning

    Environment
    • Frontend: React (16/17/18+), Next.js (13+), Redux, Redux-Saga, TypeScript, HTML5, Styled-Components, CSS, SASS, Storybook, GraphQL (Apollo Client).
    • Backend: Node.js (16/18/20+), Express, MongoDB, Mongoose, GraphQL (Apollo Server).
    • DevTools: ESLint, Jest, Enzyme, React Testing Library, Webpack (4/5), Babel, core-js, npm, pnpm, pm2.
    • Other: TanStack Query, Functional Programming, Web Threads, Async, Chrome DevTools, React DevTools, Redux DevTools.

    Methodology:
    Agile (Scrum, Kanban, ScrumBan)

    Tools:
    Jenkins, Jira, Confluence, Storybook, Intellij, git, Github, shell.
    Node.js React.js Architecture logicielle FrontendOps Software Craftsmanship

Recommendations

Be the first to recommend Hela

Help this freelancer shine by sharing your experience working together.

These freelancer profiles also match your criteria

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Education

  • National Engineering Diploma
    INSAT, Institut National Des Sciences Appliquées Et De Technologie
    2010
    National Engineering Diploma (14.41)
  • Bachelor's degree
    Lycée 7 Novembre EL Mhamdia
    2004
    Bachelor's degree

Skill set

Categories