React.js Developer

About the Role:

We are hiring a Senior Frontend Engineer to build high-performance, scalable, and visually refined web applications. This is a hands-on engineering role focused on architecture, performance, and crafting exceptional user experiences.

You will work closely with design, product, and backend teams to build robust frontend systems, define engineering standards, and ship production-grade features that scale.

Responsibilities:

- Build scalable, modular frontend applications using React, Next.js, and TypeScript

- Architect component-driven UI systems and reusable design libraries

- Implement robust state management using Redux, Zustand, or similar

- Optimize Core Web Vitals, performance, and accessibility (WCAG)

- Translate Figma/design specs into pixel-perfect, production-grade interfaces

- Improve build systems, CI/CD pipelines, and developer tooling

- Implement testing strategies — unit, integration, and E2E (Jest, Cypress, Playwright)

- Mentor junior engineers and define engineering standards

- Collaborate with backend teams to design API contracts and integrations

Must Have:

- 5+ years of experience in frontend engineering

- Strong expertise in JavaScript/TypeScript and React/Next.js

- Experience building scalable frontend architecture from scratch

- Deep understanding of browser rendering, performance, and optimization

- Strong grasp of responsive design and accessibility best practices

- Experience with state management — Redux, Zustand, or similar

- Ability to write clean, maintainable, production-ready code

Good to Have:

- Experience building design systems or component libraries

- Familiarity with SSR/SSG and performance-driven architectures

- Experience with micro-frontends or large-scale frontend systems

- Exposure to cloud deployment workflows and frontend observability

- Three.js or WebGL experience

Tech Stack:

JavaScript / TypeScript · React · Next.js · Tailwind · Redux / Zustand · Webpack / Vite · Jest · Cypress · Playwright · GraphQL · REST APIs

Work Details:

- Location: HSR Layout, Bengaluru (Work from Office)

- Working Days: 6 days/week (Mon-Fri WFO, Sat WFH)

- Employment Type: Full-time

Compensation:

- Competitive salary

- Stock options with 4-year vesting

- Performance-based incentives

To Apply:

Share your resume, GitHub profile, portfolio or live product links, and a short note on a challenging frontend problem you solved.

Mandatory Requirements:

• Strong knowledge of HTML5, JavaScript ES6 and above.

• Expertise in styling with CSS3.

• In-depth experience with React or a similar front-end framework. Candidates with only hands-on experience will not be considered.

• The ability to design and create reusable UI components.

• Willingness to complete an online coding exercise as part of the interview process.

• Ability to write clean, maintainable, and testable code.

• Understanding of accessibility standards and experience implementing accessibility solutions.

• Experience with Git and version control practices.

• Good communication and collaboration skills.

Desirable Skills:

• Familiarity with Storybook.

• Knowledge of Sass/CSS in JS.

• Experience in developing a UI library with standalone components using React.

• Experience with modern front-end build tools such as Webpack and Babel.

• Knowledge of state management solutions – Context, Redux, Zustand.

• Understanding of server-side rendering and experience with related technologies such as Next.js.

• Familiarity with Agile development methodologies.

The ideal candidate will be responsible for designing, developing, testing, and debugging responsive web and mobile applications for the company. Using JavaScript (React), HTML, and CSS, this candidate will be able to translate user and business needs into functional frontend design. Someone with prior experience with Gatsby, Hasura, Redux, etc and live projects to showcase will get prioritised.

Responsibilities

• Designing, developing, and testing UI for mobile and web applications
• Build reusable code and libraries for future use
• Accurately translate user and business needs into functional frontend code

Qualifications

• Bachelor's degree or equivalent in Computer Science
• 2+ years' experience in frontend development
• Familiarity using Scrum/Agile development methodologies
• Experience building object oriented web applications in JavaScript, HTML5, and CSS3

• You have 4-8 years of experience  in Frontend for web based applications with strong understanding of HTML, CSS, JavaScript, Frameworks like Angular  or React
• You love building things, and have built complex consumer web applications in the past.
• You have a sound understanding of data structures and algorithms.
• You are an expert in HTML, CSS, JavaScript and jQuery.
• You are an expert in at least one JavaScript framework, such as Angular 7+, React or Vue.
• You understand how website-backend interacts with frontend as well as external APIs.
• You enjoy mentoring others and helping them solve challenging problems.

Job Type: Full-time

Salary Offer: 3L PA - 5.4L PA

Job Location: Remote for 6-12 months due to the pandemic, then Mumbai, Maharashtra

Required experience:

1-2 years and above experience in developing frontend UIs using HTML5, CSS, Javascript with ReactJS. Candidate must have experience with data binding and state management (Redux/MobX)

Key Skills required :

1. Proficiency in HTML5 development

2. Proficiency in CSS Frameworks like Bootstrap ⅘

3. Strong understanding of Javascript

4. Hands on experience in building and implementing UIs in ReactJs including experience in building components, observables, state management and data binding

5. Strong expertise in building Responsive Websites

6. Experience fixing performance issues using tools like GTMetrix and Pagespeed Insights

7. Working experience in maintaining code versioning by committing to Git repositories

KRAs includes :

1. Understanding the scope of work and arriving at timelines

2. Frontend UI development using Reactjs, HTML5, Javascript and CSS

3. Implementing media queries and following Responsive Web Design principles for responsive websites

4. Implementing state management, databinding and mocking APIs

5. Unit testing prepared web applications and HTML pages

6. Coordinating with the testers to resolve any bugs

7. Reporting on daily and weekly progress

8. Optimization and performance tuning of code

Responsibilities:

• Build React Native apps from scratch that'll be used globally.
• Architect App infrastructure systems like caching, state manager, common validation framework, etc.
• Launch the apps in different app stores like Apple, Google, etc.
• Create custom reusable Component Library
• Create data visualizations like charts, tables, dashboards, etc.
• Write well tested, beautiful, performant and bug free code.
• Thrive in a collaborative team environment and work with challenging timelines.
• Establish and advocate front-end coding guidelines.
• Mentor team members and help resolve any critical blockers.

Requirements:

• A self-driven, hard-working Frontend engineer with an eye for detail.
• Bachelor's Degree or equivalent in Computer Science
• Minimum 4 years of overall experience with expertise in working in React Native, Redux and TypeScript
• Strong understanding and knowledge of Styling
• Experience in writing native code for Android and iOS
• Strong debugging skills for Android and iOS.
• Experience in launching apps in various App Stores.
• Experience with GraphQL is a plus.
• Familiarity with modern front-end build pipelines and tools

Spotnana is a stealth startup that is building the technology stack to solve the experience, trust, and transparency challenges that legacy players in a $1.8 trillion industry refuse to.  We were told it can’t be done - and now we’re doing it.

Based in the San Francisco Bay Area, our founding team consists of veterans from Google, Amazon, Twitter, Airbnb, Expedia, ThoughtSpot, FreshDesk, Goldman Sachs, Oyo, SAP, and Cohesity 

Join us to find out what Silicon Valley investors and early backers of Airbnb, Amazon, Facebook, LinkedIn, Brex, Palantir, Revolut, and Snowflake see in our mission.

Let's explore creating one of the best pieces of work ever made, together.

Senior Software Engineer, Frontend

https://www.alivecor.com/">AliveCor, the pioneer of the smartphone EKG, with millions of EKGs from a large and growing user base, seeks a Senior Software Engineer (Front-end Applications) to contribute to the Applications team. You will be an integral member of our engineering team, responsible for developing industry-leading web applications that transform the healthcare industry and affect the way consumers use, engage, and act on their health data.

• Passionate about User Experience.
• Has great verbal and written communication skills to engage directly with your peers.
• Understands and is thoughtful about engineering trade-offs
• Experience building web applications with cross-browser support and RESTful API integrations
• Commitment to delivering results.
• Passionate about continuous improvement.

• B.E in Computer Science or a related discipline, or related practical experience.
• 5-8 years of Frontend development experience with at least 2 years working as a React.js Developer.
• A strong grasp of software engineering and web application development fundamentals, including JavaScript (ES5, ES6), HTML and CSS.
• Aptitude to learn new technologies (e.g. ES.Next).
• Excellent troubleshooting skills.
• Familiarity with RESTful APIs to connect the Front-end applications to backend service
• Bonus points for:
• Publicly available web applications, portfolios, or examples available on a source repository (e.g. GitHub, GitLab, Bitbucket)
• An interest in data visualizations using JavaScript libraries such as D3, Highcharts, and others
• Experience managing front end tooling (e.g. gulp, grunt, webpack, post-CSS, service workers)
• Experience with performance analysis and tuning of web application
• Experience developing back end server APIs and/or server-side rendering

AliveCor is on a mission to define modern healthcare through data, design and disruption. We’ve pioneered the creation of FDA-cleared machine-learning techniques, transformed wearable medtech to put proactive heart care at everyone’s fingertips. Kardia is the most clinically validated mobile EKG technology. AliveCor was named as one of the Top 10 Most Innovative Companies in Health for 2017 by Fast Company as part of the publication’s annual ranking of the world’s Most Innovative Companies. AliveCor was awarded the 2015 Tech Pioneer by the World Economic Forum and one of the 50 Smartest Companies in 2015 by the MIT Technology Review. AliveCor recently announced a collaboration with Mayo Clinic that will result in new machine learning capabilities to unlock previously hidden health indicators in EKG data, potentially improving heart health as well as overall health care for a variety of conditions. AliveCor is a privately held company headquartered in Mountain View, CA.

AliveCor is an equal opportunity employer and will not discriminate against any employee or applicant on the basis of age, colour, disability, gender, national origin, race, religion, sexual orientation, or any other classification protected by federal, state, or local law.

Watch the following video demonstrating our product.

https://www.youtube.com/watch?v=8I9xosgA-Ig">KardiaMobile: How's your heart?
https://www.youtube.com/watch?v=8I9xosgA-Ig

Roles and Responsibilities

• Design and implement components of our web application, and admin panel
• Build a robust, lightweight, and high-performance client-side app
• Translating designs and wireframes into high quality code
• Write documentation and guides for web app & admin panel

Key Qualifications

• Expertise in ReactJS/Redux
• Working knowledge of TypeScript or Flow is a plus
• PURE experience of 1.5 Years and more in Frontend Development
• Expert-level knowledge of developing, shipping, and maintaining Javascript applications
• Knowledge of general software design patterns
• Deep understanding of Javascript
• Up-to-date on the latest build tools, and libraries such as ES6, Webpack, Babel
• Proficient in Javascript with strong object-oriented design skills
• Able to work independently and drive results

• You’ve got good experience working on web applications
• You have a clear knowledge and hands-on with ES6+ and you know AngularJS, Vue or React/React-Native
• Advanced knowledge in AngularJS, VueJS and CSS with material design styles guide
• Basic knowledge of NodeJS
• Basic understanding on Progressive Web Applications will be well appreciated
• Advanced knowledge in WebPack and other basic tools to work with Javascript nowadays (Git, npm, etc ...)
• Knowledge and experience in the development of unit tests for VueJS (no matter the library or framework)
• Good Knowledge on Optimizing performance and browser compatibility is always at the top of your mind

Skills Required:

VueJS, AngularJS, ReactJS, NodeJs, Webpack, CSS, HTML5