ReactJS Developer

Required Skills and Experience:

• 5 - 11 years of experience in front-end development, with a strong focus on React.js.
• Proven experience with React.js and related technologies (e.g., Redux, React Router, Hooks, Context API).
• Strong proficiency in JavaScript, HTML5, CSS3, and modern front-end build tools (e.g., Webpack, Babel, etc.).
• Hands-on experience with RESTful APIs, Server Sent Events, WebSocket's
• Hand’s on experience with web components, micro frontends
• Deep understanding of browser apis like history, intersection observer, event handling, virtual panes, drag and drop etc
• Ability to work on a complex and fast moving code base.
• Familiarity with TypeScript and its integration with React applications.
• Strong problem-solving skills and attention to detail.

Job Summary:

We are looking for a passionate Frontend Engineer with 2 to 4 years of experience to build high-quality, scalable, and user-friendly web applications. You will work closely with cross-functional teams to bring ideas to life using modern JavaScript frameworks, maintaining best-in-class UI standards, performance, and code quality.

Website: https://www.thealteroffice.com/about

Key Responsibilities:

• Develop and maintain modern, high-performance, and responsive web applications using JavaScript frameworks such as React, Vue, or Next.js.
• Translate product designs from tools like Figma into pixel-perfect, accessible, and consistent UI components.
• Build reusable components and contribute to shared design systems or UI libraries.
• Manage state effectively using tools like Redux, Zustand, or Context API.
• Ensure applications are responsive, cross-browser compatible, and adhere to accessibility standards (WCAG).
• Optimize frontend performance using tools like Lighthouse, Web Vitals, and browser profiling.
• Use TypeScript to write type-safe and scalable code.
• Write unit, integration, and E2E tests using frameworks like Jest, Testing Library, Cypress, or Playwright.
• Work with backend teams to design APIs and ensure efficient, secure frontend-backend integration.
• Implement frontend security best practices, such as XSS protection and CSP.
• Use tools like Tailwind CSS, Framer Motion, and Styled Components for rapid, modern UI development.
• Contribute to CI/CD workflows, version control using Git, and deploy applications using platforms like Vercel, Netlify, or Firebase.
• Participate in code reviews, share knowledge, and help drive technical excellence across the team.

Requirements:

• 2 to 4 years of experience building and shipping frontend applications in a professional setting.
• Proficiency in JavaScript (ES6+), HTML5, and CSS3, with a strong understanding of modern frontend architecture.
• Hands-on experience with at least one JavaScript framework/library (React preferred).
• Strong knowledge of TypeScript and state management tools.
• Solid understanding of UI/UX best practices, including responsive design, performance, and accessibility.
• Experience with testing methodologies and automation tools.
• Familiarity with design systems, component libraries, and modern build/deployment tools (Webpack, Vite, Vercel, etc.).
• Comfortable working in agile teams, collaborating with designers, product managers, and backend engineers.

What does the role look like?

Software Development Engineers FE will be responsible to participate in all stages of the software product development life cycle. This will include analyzing system and user requirements, designing software flowcharts, creating user interfacing applications (Web Or Mobile) , troubleshooting bugs, and running tests to improve system functionality.
An ideal candidate would be someone who has proficiency in Flutter and JavaScript frameworks, good analytical skills, the ability to anticipate issues and frame remedial actions, and excellent teamwork skills.

What will you be doing?
● Write simple, efficient, and maintainable code.
● Design, develop, scale and maintain User Application written in JS or Dart.
● Manage individual priorities, deadlines, and deliverables.
● Validating the functionality and security of the application.
● Function well in a fast-paced, rapidly changing environment
● Ensuring best coding standards and practices to improve and maintain quality.
● Meeting with the engineering and product team to discuss project definitions and goals.

What will you need ?
● Bachelor/Master degree in CS or related field from a reputed college
● Sound knowledge of JavaScript or Flutter technologies.
● Solid grip on the programming basics like DS and algorithms, OOPS.
● Understanding & experience with restful APIs and microservice architecture
● Prior experience in start-ups or health-tech will be a plus

• Possesses a high degree of technical competency to design and develop digital applications using cutting-edge tools and technologies
• Collaborative working with the client's technology and business staff day to day
• Proactive and willing to go above and beyond to satisfy the client and deliver on project goals
• Codes, tests, debugs, implements, and documents complex applications
• Prepares for, and actively facilitates hand-off at project completion to ensure a smooth transition to the larger organization
• Extensive experience in Angular (i.e., designs new templates, tests styles or sheets, fixes bugs; collaborates heavily with core team members (especially UX and Design))
• Integration knowledge and experience with exposed services (e.g. REST, SOAP, etc.)
• Familiar with common security and performance pattern (e.g.: OATH)
• Additional Requirements for Application Platform: Angular
• Level of expertise with Angular SSR applications
• Knowledge of Micro Frontends or Micro UI
• Interaction paradigm with UI elements
• Exposure to CSS and Javascript

• Programming Languages: Java, Objective-C, C++, JAVASCRIPT, NodeJS
• Web Technologies: Angular 9/10, ReactJS, ES6, NgRx, Redux, HTML5, CSS3, BOOTSTRAP, JQuery, PHP, AJAX, PolymerJS
• Web Services: REST, SOAP
• Web Service Protocols: HTTP, XML, WSDL, UDDI, SOA
• Databases: MySQL, Oracle, MongoDB

• Solid knowledge of HTML5 and CSS3 web standards
• Solid knowledge of JavaScript as well as Browser APIs
• Angular 2+
• RxJS, Typescript, JQuery.
• Experience writing unit tests
• Webpack, Babel
• Familiar with SASS and Responsive Design
• Experience using any CSS naming convention
• Experience debugging using JavaScript-based tools like Chrome Developer Console
• Solid understanding of Git
• Good understanding of SEO principles
• You are self-organized and can work autonomously
• Strong analytical, problem-solving, written and verbal communication skills

• Develop reusable, maintainable cross-platform HTML, CSS, and JavaScript for front-end web application components while adhering to web and team standards.
• Write unit tests to provide sufficient testing coverage for each developed component.
• Constantly review and improve frontend performance of the web application.
• Work with creative and business partners to understand, build and adjust web application functionality and visual presentation to support business goals.
• Work with server-side, infrastructure, and 3rd party technology partners to build, integrate and deploy web application functionality and visual presentation to support business goals.
• Work with project technical lead and/or FE architect to create technical designs and implementation plans.
• Ensure accuracy and attention to detail throughout the development process.
• Remain curious and current with new developments in the FE web development industry.

QUALIFICATIONS:

• Demonstrated 3-5 years of practical front-end web development experience.
• Expertise in writing and testing valid, web standards-based HTML, CSS, JS.
• Fluent in fundamentals of computer science such as:
• Object-Oriented Programming, Data Structures, Coding Patterns.
• Deep understanding and experience with the following standards and technologies is essential:
• DOM, JSON, AJAX, HTML5 Video, WCAG 2.0 AA, Git.
• Strong verbal and written communication skills are preferred.
• Bachelor’s Degree is preferred.
• Sample portfolio (code or public-facing web build) is a plus.
• Experience working for high-end brands or another environment with very high standards for the presentation layer is a plus; Ecommerce experience is a plus

We are looking for a great JavaScript developer with 4+ years of experience who is proficient with React.js. Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality products are very important.

Responsibilities

● Developing new user-facing features using React.js

● Building reusable components and front-end libraries for future use

● Translating designs and wireframes into high-quality code

● Optimizing components for maximum performance across a vast array of web-capable devices and browsers

Skills

● Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model

● Thorough understanding of React.js and its core principles

● Experience with popular React.js workflows (such as Flux, Redux, or Redux Saga)

● Familiarity with newer specifications of EcmaScript ● Knowledge of Node.js is considered a big plus

● Knowledge of D3.js is considered a plus

● You are always mindful of quality attributes like maintainability, performance, security, scalability, usability, and testability. As a result, you have successfully contributed to the architecture and UI/UX proposals and decisions.

● Strong experience creating pixel perfect and responsive designs

● Strong CSS skills (SCSS / Styled-components)

● Experience with data structure libraries (e.g., Immutable.js)

● Knowledge of Reactjs functional components and react hooks.

● Familiarity with RESTful APIs

● Knowledge of modern authorization mechanisms, such as JSON Web Token

● Familiarity with modern front-end build pipelines and tools

● Experience with common front-end development tools such as Babel, Webpack, NPM, etc.

● Ability to understand business requirements and translate them into technical requirements

● A knack for benchmarking and optimization

● Familiarity with code versioning tools (such as Git)