Senior React Developer
Publicis Sapient
Lublin, PL
1 d. temu
source : Just Join IT

ReactJS (advanced)

Functional Programming (advanced)

JavaScript (advanced)

HTML5 (advanced)

Your primary responsibilities will include developing interactive web-based, mobile, and / or desktop applications using Publicis Sapient as well as industry best practices to deliver high value and quality to Publicis Sapient clients.

Responsibilities will include several of the following :

  • Technical end-to-end design for stories by collaborating with business analyst / product owner, technical architect, and clients.
  • Design and implement stories end-to-end, which includes Frontend, Backends for Frontend (BFF), Caching and also service orchestration in some cases, using best engineering practices like test-driven development, SOLID principles, and consideration of non-functional requirements like performance, scalability, security, or cloud readiness (as applicable) at a story level.
  • Focus on quality by implementing best practices like logging, calling out technical debt, meeting KPIs using code quality tools like SonarQube, ESLint (customize and sync with Sonar), Stylelint / Sasslint, and so on.
  • Hands-on with automating redundant work, like common component structure, both in terms of scaffolding as well as using the right design patterns / creating abstractions.
  • Mentor junior engineers in helping review code, guiding on technical decisions.
  • Hands-on with DevOps pipeline and able to tweak / change build / deployment pipeline as needed in the context of a module (e.

    g. Jenkins / Travis / / Gitlab).


  • Excellent hands-on knowledge of HTML5, CSS3, JavaScript, CSS Modules / CSS in JS, SASS.
  • Hands-on experience with Functional Programming (FP).
  • Hands-on experience working with Object Oriented JavaScript (OOJS), JavaScript - and practical uses in building complex interactive experiences, primarily with ECMAScript.
  • Good understanding of creational and structural design patterns in JavaScript.
  • Experience working with Single Page Applications (SPA) with universal rendering capabilities and ( or Microfrontends) .
  • Solid understanding of React.js, its core principles - lifecycle methods, virtual DOM etc. and at least 6 12 months of hands-on experience with the same.
  • Understanding of one-way data flow and the Flux architecture.
  • Nice to have experience of implementing Security features in frontend applications, which includes adding the right security headers, CSP policies, protection against XSS click jacking etc.
  • Understanding of React Hooks, Suspense, Memo etc.
  • Different middleware implementations available for async actions in Redux like redux-thunk, redux-saga, redux-observable etc.
  • Hands-on experience with at least one.

  • Understanding of different CSS architectures that go hand-in-hand with React.js application development. Pros and cons of component-level CSS vs global and where to apply each.
  • Thorough understanding of Webpack bundler. Experience with configuring Webpack from scratch is a plus. Experience with Rollup, Parcel is a plus.
  • Hands-on experience with building Progressive Web Apps (PWAs) on any framework.
  • Hands-on experience with Frontend Performance Optimization especially in a React application with respect to resource loading strategy, CPU / Memory profiling on the browser.
  • Hands-on experience with test-driven development using Jest or equivalent. Familiar with snapshot testing, code coverage.
  • Experience working with utilities like Enzyme.

  • Experience using fluid grids, and building responsive / adaptive websites using Bootstrap etc.
  • Excellent speaking and writing skills for effective communication. Any demonstrated ability with blogs, speaking at conferences / meetups is a plus.
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