Sr. Full Stack React Js Developer

Job Title

Senior Associate, eXperience Technology

As a Senior Experience Technologist, you’ll be working as part of an agile team with other passionate, driven, and talented people, creating innovative solutions for our clients. Your primary responsibilities will include developing interactive web-based, mobile, and/or desktop applications using Sapient as well as industry best practices to deliver high value and quality to Publicis Sapient clients.

What are we looking for in you?

• Technical end-to-end design for stories by collaborating with business analyst/product owner, technical architect and clients
• 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 the story level
• Automates testing at unit, module and integration level as needed using tools relevant for the platform (e.g. Jasmine, Jest, Karma, Webdriver.io etc.)
• 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 decision making
• 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 / Now.sh / Gitlab)

Key Requirements:

• 4-9 years’ experience
• Excellent hands-on knowledge of HTML5, CSS3, JavaScript
• Hands-on experience working with Object Oriented JavaScript (OOJS), JavaScript - and practical uses in building complex interactive experiences, primarily with ECMAScript 2015+. You should be up-to-date with new specifications (different stages), and also, using transpilers like Babel to use features from all stages
• Good understanding of creational and structural design patterns in JavaScript
• Hands-on experience with Functional Programming (FP)
• Experience working with Single Page Applications (SPA) with universal rendering capabilities.
• Good understanding of React.js, its core principles - lifecycle methods, virtual DOM etc. and at least 6 – 12 months hands-on experience with the same
• Understanding of one-way data flow and the Flux architecture.
• Understanding of stateful (container) vs stateless (presentational) components and how to break down the application page into components
• Core understanding of how React’s state management works out of the box. Understanding of different libraries available to better manage application state like Redux/MobX. The difference in the way each library works (pure functions vs observables etc.) and the workflows as well as best practices
• 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 (version 2+). Experience with configuring Webpack from scratch is a plus. Experience with Rollup, Parcel is a plus.
• Good understanding of the Web Components standard.
• 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.
• Hands-on experience working with server-side JavaScript frameworks like Express, Koa, Hapi etc. (based on Node.js
• Good understanding of REST APIs and Microservices. Should have an understanding of how resources are organized and how an application should align based on the same. You are expected to have an understanding of how CRUD operations map to HTTP methods for a well-designed service.
• Logically understands relational databases like MySQL and non-relational databases like MongoDB and can manage to work with it.
• Hands-on experience with GraphQL is a big plus.
• Hands-on experience working with client-side templating languages like Handlebars, Mustache, etc.
• Hands-on experience working with frontend build systems and automating the same using any task runner
• Understanding of SEO and accessibility and making it part of the development workflow
• Moderate to Strong graphics manipulation/optimization skills using Photoshop is a plus.
• Understanding of hybrid vs native mobile apps – and pros/cons with respect to PWA.

Education:

Bachelors in Computer Science or equivalent education covering Math, Algorithms, Data Structures, Networking, Databases, Operating Systems, Graphics.

About us:
At Publicis Sapient, we enable our clients to thrive in Next and to create business value through expert strategies, customer-centric experience design, and world-class product engineering.  The future of business is disrupting, transforming, platforming, and becoming digital to the core.  We see it in every major industry, from financial services to automotive, consumer products, retail, energy, and travel.  We are looking for people who have the courage to break out of what has always been to go do what will be.  If you have an optimism that says there is no limit to what we can achieve in this exciting time, then we should talk.  Our work is fueled by challenging boundaries, multidisciplinary collaboration, highly agile teams, and the power of the newest technologies and platforms.  Our people thrive because of the belief that it’s both our privilege and responsibility to usher our clients and the world into Next. We are seeking those deeply skilled, bold, collaborative, flexible, and who want to reimagine the way the world works to help businesses improve the daily lives of people, and the world. This is the world-class engineering team where you should build your career.