


- Previous experience working as a node.js developer.
- Extensive knowledge of JavaScript, web stacks, libraries, and frameworks.
- Knowledge of front-end technologies such as HTML5 and CSS3.
- Superb interpersonal, communication, and collaboration skills.
- Exceptional analytical and problem-solving aptitude.
- Great organizational and time management skills.
- Availability to resolve urgent web application issues outside of business hours.

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Job Title : Lead Web App Developer – Frontend
Experience : 10+ Years
Location : Bengaluru
Work Mode : Hybrid (3 days in office)
Role Overview :
We are seeking a Lead Frontend Engineer to build and maintain responsive, cloud-based web applications. This role involves developing efficient user interfaces using React.js, collaborating closely with UX and backend teams, and ensuring high-quality code.
Key Responsibilities:
- Frontend Development: Create and maintain web applications using React.js, HTML, CSS, and JavaScript/TypeScript.
- Collaboration: Work with UX designers to deliver excellent user experiences and ensure seamless backend integration.
- Code Quality: Write clean, efficient, and maintainable code while staying updated with modern practices.
- Build & Deployment: Manage build pipelines with Jenkins, deploy to CDNs, and leverage GCP for scalable solutions.
- Technical Expertise: Implement JavaScript frameworks and libraries for web analytics and use Git for version control.
Requirements:
Technical Skills:
- Proficiency in React.js, HTML, CSS, JavaScript/TypeScript, and Node.js frameworks.
- Strong debugging and problem-solving skills.
- Exposure to RDBMS and SQL (preferred).
Soft Skills:
- Excellent communication and collaboration abilities.
- Leadership skills to guide and inspire a team of developers.
- Education: Bachelor's/Master’s in Computer Science or related fields.
Notice Period: 30 days preferred
Interview Process:
- Technical Round: Online technical assessment (1 hour).
- Face-to-Face Interview: In-person interview with the team at the Bengaluru office (3 hours).
- Final Round: Online interview with the CEO (30 minutes).
Additional Information:
- Candidates from Bengaluru or willing to relocate are preferred.
- F2F interview attendance on a weekday is mandatory.

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Experience Level: Min 2+ years
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JavaScript and react.
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RESTful API’s, basic HTTP knowledge, GET/POST.
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Experience using technologies like React, Redux, TypeScript, modern CSS frameworks and web pack.
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Good Communication Skills


Responsibilities:
• Design, develop, and maintain user interfaces for the internal product suite.
• Collaborate closely with product managers and backend engineers to understand
requirements, translate them into user-friendly interfaces, and ensure a consistent
user experience across all products.
• Champion the technical feasibility of our UI/UX designs, ensuring seamless user experiences.
• Write clean, maintainable, and well-documented code adhering to best practices and coding standards.
• Conduct unit and integration tests to ensure code quality and functionality.
• Stay up-to-date with the latest UI development trends and technologies.
• Take initiative and ownership of assigned tasks, ensuring they are completed efficiently and to a high standard.
Requirements/Qualifications
• Bachelors in any Computers stream or related fields
• Minimum 1+ years of experience as a UI Developer.
• Proficiency in Javascript,Node.js & any one of (Angular, Nextjs or React.js)
• Experience with unit and integration testing frameworks.
• Excellent communication and collaboration skills.
• Ability to work independently and as part of a team.
• A passion for modern web development practices and a drive to deliver high-quality
work.
• Good to have the Experience with responsive design and cross-browser compatibility.

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
Key Requirements:
• 4-9 years’ experience
• 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
• 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 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+).
• 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.
• 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.
Knowledge & experience of the below skills will earn additional brownie points:
• Logically understands relational databases like MySQL and non-relational databases like MongoDB and can manage to work with it.
• Hands-on experience with GraphQL.
• Hands-on experience working with client-side templating languages like Handlebars, Mustache, etc.
• Hands-on experience with Functional Programming (FP)
• Hands-on experience working with frontend build systems and automating the same using any task runner
• Understanding of hybrid vs native mobile apps – and pros/cons with respect to PWA.
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.
• 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)
• Experience with configuring Webpack from scratch and working knowhow of Rollup / Parcel.
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.

Key aspects of this role:
• Meeting with the development team to discuss user interface ideas and applications.
• Reviewing application requirements and interface designs.
• Identifying web-based user interactions.
• Developing and implementing highly-responsive user interface components using React
concepts.
• Writing application interface codes using JavaScript following React.js workflows.
• Troubleshooting interface software and debugging application codes.
• Developing and implementing front-end architecture to support user interface concepts.
• Monitoring and improving front-end performance.
• Documenting application changes and developing updates.
To be the right fit, you'll need:
• Minimum 4+ years relevant experience in application development and React JS.
• Knowledge of React hooks such that use Context, use Reducer, use Effect.
• Knowledge of React props and state management (both functional and class component)
• Strong understanding of Error boundary concept of react.
• Work experience with any react based UI library or Redux is preferable
• Experience in building cross-browser layouts with CSS and HTML

Requirements:
- Previous experience working as a React.js Developer.
- In-depth knowledge of JavaScript, CSS, HTML and front-end languages.
- Knowledge of REACT tools including React.js, Webpack and Redux is a must.
- Experience with REST APIs
- Proficient understanding of code versioning tools
- Ability to translate designs into code
- Experience with browser-based debugging and performance testing software.
- Excellent troubleshooting skills.

What you will do:
- Build cross-browser compatible front-end applications using ReactJS, JavaScript, HTML and CSS.
- Develop fast and highly scalable and responsive applications.
- Work closely with cross-functional teams of product manager, backend developers, and UI/UX designers.
- Partner with product teams to ensure user interactions & features are well-designed and implemented.
- Manage individual project priorities, deadlines and deliverables.
Skills And Qualifications:
- 4+ years of work experience in frontend web development.
- Strong understanding of Core Javascript, ReactJS, React Native (desired), semantic HTML5 CSS, Flexbox and responsive development.
- Thorough understanding of Javascript design patterns
- Proficient understanding of web markup, including HTML5 CSS3
- Understanding of server-side CSS pre-processing platforms, such as LESS and SASS
- Proficient understanding of advanced JavaScript libraries and frameworks, such as ReactJS, AngularJS
- Good understanding of asynchronous request handling, partial page updates, and AJAX
- Preferably from a SaaS and web applications platforms background, and/or B2B applications.
- Proficient understanding of cross-browser compatibility issues and ways to work around them
- Proficient understanding of code versioning tools, such as Git
- Experience in building APIs / application backends using Node.js (good to have)
Understanding of UI / UX best practices and ability to collaborate with the Design team to implement functional and intuitive user experiences

Requirements
- 2-5 years of experience as a front-end developer
- Experienced in developing applications using JavaScript, ReactJS, Redux, Redux Saga, NodeJS, HTML5, CSS3/CSS4 and other UI technologies.
- Understanding and experience with ES6 concepts, asynchronous processing, partial page refresh, DOM traversal and manipulation.
- Experience with REST API construction, documentation, and architecture, including API description languages like Swagger.
- Comfortable writing Unit Test Cases (Enzyme/ Jest)
- Familiar with cloud services: AWS, Dev-ops such as Git, Jira, Confluence
- Good to have experience/knowledge of
- Spring (MVC, IOP/DI, REST, Security)
- Docker,
- Scala,
- Python
- Able to connect the dots between code and business value
Responsibilities
- Engage in high level conversations about business strategy and the role tech plays in it
- Write well-designed, testable, and efficient code that powers our application
- Write specs and do planning for everything we build
- Conduct application analysis, testing, and debugging
- Diligently document code to keep it clean and transparent
- Ensure cross-browser and device compatibility
You Are
- You believe it’s always on you to make sure anything you do is a success.
- You have the ability to make quick and effective decisions.
- In love with a challenge. You revel in solving problems and want a job that pushes you out of your comfort zone.
- Open to change. You’re inspired by the endless ways in which everything we do can always be improved.
Add-Ons/Interview Process
- You should be comfortable working in a Start-up for in-house product development.
- Will not be engaged with any Client, but with the internal team (in India & the US).
- Will be provided a hands-on exercise to complete and submit as a part of interview.


Responsibilities:
- Develop new user-facing features
- Build reusable code and libraries for future use
- Ensure the technical feasibility of UI/UX designs
- Optimize application for maximum speed and scalability
- Collaborate with other team members
You’ll be a good fit if you:
- Have 1+ years of experience developing user facing features
- Have a deep understanding of basic UI/UX/design principles
- Are self-motivated and can solve problems independently
- Experience leveraging web technologies like HTML, CSS, and Javascript(ES6)
- Experience using the latest CSS layout methods such as Flexbox and Grid
- Experience with CSS preprocessors like Sass or LESS
- Knowledge and hands-on experience with Node.js ecosystem and leveraging Javascript libraries / frameworks such as React, Angular or Vue
- Experience with testing frameworks (Jest) and writing unit tests
- Competency in building responsive layouts
- Practical knowledge of performance optimization techniques
- Collaboration in a GitHub repository with many contributors and comfortable with workflows like code reviews, forking, pull requests, etc.




