Senior ReactJS developer

Position Overview: Front-End Developer (Next.js)

We are seeking an experienced Front-End Developer with strong hands-on expertise in Next.js and React.js. The ideal candidate will build and maintain scalable, responsive web applications using modern front-end technologies and best practices in performance, SEO, and rendering techniques.

Key Responsibilities

• Develop and maintain responsive, scalable web applications using React.js and Next.js
• Implement CSR, SSR, and SSG using Next.js best practices
• Build reusable, modular UI components following clean front-end architecture
• Integrate and manage REST APIs for data retrieval, caching, and error handling (React Query or similar)
• Optimize applications for performance, SEO, and accessibility
• Collaborate with backend engineers and UI/UX designers to deliver high-quality user interfaces
• Debug, test, and document code to ensure maintainability and scalability

Required Skills

• Strong knowledge of Next.js fundamentals (routing, rendering techniques, API routes)
• Proficiency with React Hooks and understanding of component lifecycle
• Solid experience integrating REST APIs and handling errors effectively
• Familiarity with state management libraries such as React Query, Redux, or Zustand
• Strong skills in JavaScript (ES6+), HTML5, and CSS3
• 7–10 years of front-end development experience

JOB DESCRIPTION FOR FRONTEND DEVELOPER ROLE 

Company Overview 

Boolment Software Development Pvt. Ltd. is a fast-growing technology company delivering innovative software solutions across diverse industries. Our mission is to empower businesses through scalable and high-quality technology products. We foster a culture of innovation, collaboration, and continuous learning, providing employees with opportunities to work on cutting-edge technologies and projects. 

Job Title : Front Developer  

Department: Software Development 

Location: Gurgaon, Haryana 

Employment Type: Full-Time / Internship (3 months) 

Working Mode: On-site 

Shifts: 6 Day (9:30 AM – 6:30 PM)  

Reporting To: Manager 

Vacancies: 3–5 

Experience: 0–3 years (Freshers eligible) 

Salary Range: ₹3 LPA – ₹6.5 LPA | Internship Stipend: ₹0–₹15,000/month 

Job Summary 

We are seeking a skilled Frontend Developer to join our dynamic team. The ideal candidate will be responsible for designing, developing, and maintaining responsive and high-performance web applications. You will work closely with UX/UI designers, backend developers, and product teams to deliver exceptional user experiences. 

Key Responsibilities 

UI/UX Implementation: 

• Implement modern, responsive, and interactive user interfaces based on wireframes, mockups, and prototypes. 
• Collaborate with UX/UI designers to translate designs into functional and visually compelling interfaces. 
• Ensure web accessibility and usability best practices. 

Frontend Development: 

• Develop scalable, maintainable, and reusable components using modern JavaScript frameworks and tools such as Angular, Bootstrap, and Thymeleaf and JSP (JavaServer Pages). 
• Write clean, modular, and efficient code in HTML5, CSS3, JavaScript (ES6+), and jQuery. 
• Use CSS Preprocessors such as SASS, LESS, and CSS methodologies like BEM for maintainable styling. 
• Work with JSP (Java Server Pages) and Thymeleaf templates to integrate frontend interfaces with backend systems. 
• Optimize applications for speed, responsiveness, and overall performance across devices. 
• Implement lazy loading, bundling, and code-splitting for enhanced performance. 
• Integrate frontend components with backend services via RESTful APIs. 
• Perform cross-browser and cross-device testing to ensure consistent UI. 
• Participate in code reviews, provide constructive feedback, and follow version control best practices using Git. 
• Ensure cross-browser and cross-device compatibility across web and mobile platforms. 
• Collaborate with cross-functional teams to deliver innovative and high-quality web solutions. 
• Contribute documentation, reusable components, and design systems for long-term maintainability. 

Testing & Debugging: 

• Write unit and integration tests for frontend components. 
• Debug and resolve performance and compatibility issues. 

Continuous Learning & Innovation: 

• Stay up-to-date with the latest trends in front-end development, frameworks, and web technologies. 
• Recommend new tools, libraries, and approaches to improve development efficiency and user experience. 

Must-Have Skills 

• Core Frontend: HTML5, CSS3, JavaScript (ES6+), jQuery 
• Frontend Frameworks/Libraries: Bootstrap, Angular, JSP, Thymeleaf 
• CSS Preprocessors & Methodologies: SASS, LESS, Tailwind CSS, BEM 
• Responsive & Mobile Design: Media Queries, Flexbox, Grid, Mobile-First Design 
• APIs & Data Handling: RESTful Services 
• Version Control & Collaboration: Git, GitHub/GitLab/Bitbucket, Branching & Merging Strategies 
• Frontend Testing & Debugging: Jest, Chrome DevTools 
• Problem-Solving & Analytical Skills: Debugging UI issues, optimizing performance, identifying bottlenecks 
• Cross-Browser & Cross-Device Testing: BrowserStack, Lighthouse 

Good-to-Have Skills / Trending Skills: 

• TypeScript for type-safe JavaScript development. 
• UI libraries/frameworks like Tailwind CSS, Material-UI. 
• Testing frameworks such as Jest, Cypress, or Selenium. 
• Experience with CI/CD pipelines and cloud deployments. 
• Knowledge of micro-frontends architecture or modern web development trends. 

Qualification & Soft Skills 

• B.Tech / BE / MCA / Equivalent degree in Computer Science, IT, or related field. 
• Strong verbal and written communication skills. 
• Ability to explain technical concepts to non-technical stakeholders. 
• Collaborative, adaptable, and open to learning. 
• Attention to detail with a creative problem-solving mindset. 

Compensation & Benefits 

• Competitive salary (based on experience). 
• Health & Medical Insurance, Gratuity, and Retirement Benefits. 
• Paid Leaves, Travel Reimbursements, and Performance Bonuses. 
• Access to training programs, certifications, and mentorship. 
• Cross-functional exposure and opportunities for career growth and advancement. 

About Our Client

Our client is a Currency Exchange in India. Built with user experience and security in mind, Our Client provides instant fiat to crypto conversions with zero fees, so that users can have access to a diverse suite of financial products and services that are backed by industry-leading security processes and insurance protection. Our Client aims to be the global gateway to cryptocurrencies. Its proprietary liquidity aggregation model provides its users with access to liquidity from leading global crypto exchanges. Our Client is recognized and awarded for its contribution to the Indian emerging tech space.

Why Our Client?

Cryptocurrency Traders are looking for a strong global platform that can help them trade faster, better and smarter. We are building a platform that can solve their needs. The opportunity is big, and the journey is tough. Now that’s a challenge that needs to be addressed. You do that. You are phenomenal in solving these complex challenges. You help our team do more.


As a Front End Developer - Angular, you do all of the above and more. You make a difference.

What will I do?

• Delivering a complete front end application
  • Ensuring high performance on mobile and desktop
  • Writing tested, idiomatic, and documented JavaScript, HTML, and CSS
  • Coordinating the workflow between the graphic designer, the HTML coder, and yourself
  • Cooperating with the back-end developer in the process of building the RESTful API
  • Communicating with external web services
  • Ensure high-quality graphic standards and brand consistency
  • Stay up-to-date on emerging technologies
  • Write functional requirement documents and guides

What skills should I have?

- Must have 7+ years of experience in frontend development with an internet startup.
- Deep knowledge of Angular practices and commonly used modules based on extensive work experience
- Proficiency with JavaScript and HTML5
- Extensive knowledge of CSS and JS methods for providing performance visual effects and keeping the frame rate above 30fps at all times
- Thorough understanding of the responsibilities of the platform, database, API, caching layer, proxies, and other web services used in the system
- Creating custom, general use modules and components which extend the elements and modules of core Angular
- Ability to understand business requirements and translate them into technical requirements

Do you love React / Javascript / Frontend?

Like solving different problems, up for learning new stuff every day? Do you Like frontend but also like full stack? Like JavaScript but also like other languages? We are looking for the constantly curious and willing-to-try-new things type of people! 

We are mostly React but not only, but we do also push into all types of strange and common.

Typical tools in our toolbox are:

React
Typescript
Redux (RTK toolkit)
Recoil
Create React App
React-Router
CSS / Sass
a lot of vanilla JS
Figma
Git

Great, if you are familiar with:

• 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.

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 or Redux)

● Familiarity with newer specifications of ECMAScript

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

● Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.

● Experience with user interface design.

● Knowledge of isomorphic React is a plus

● Familiarity with RESTful APIs

• Develop web-based application for analytics using Angular
• Integrate and extend Python REST APIs and create visually stunning UI experiences for analysts and users.
• Create flexible dashboards and reports (using plotly, d3, etc) and  leverage open source technology to create various components.
• Create a flexible UI for data analytics and big data usecases which can be used by Large Tier banks as well as smallscale agile startups
• Write unit tests and functional tests for the component using tools like Jasmine, Karma, Cypress, etc.
• Follow software development practices with continuous testing, development and integration (CD/CI)
• Write and maintain technical design documents and new-feature documents
• Collaborate closely with developers, engineers, testers, and product managers
• Participate in peer-based code reviews and design reviews
• Follow agile methodology and encourage collaboration with tools such as GIT, Confluence and Slack applications
• Undergraduate degree or above in computer science preferred

Required Qualifications

• Knows SPA and frontend technologies well
• Has used atleast 1 web framework: Angular / React / Vue / etc. and comfortable with Javascript/Typescript.
• Experience with styling (CSS / SCSS / others) frameworks like bootstrap, material, foundation, tailwind, etc. is a plus
• Knowledge on visualization frameworks like D3, plotly, highcharts, chart.js, etc. to make customizable dashboards.
• Has used testing libraries like karma, jest, jasmine, cypress, selenium, etc.
• Familiar with with frontend processes like State management (Redux), Reactive programming (rxjs), Authentication methods (JWT, SAML) etc. 
• Basic knowledge about APIs (flask, django, nodejs) and worked on deploying web applications (nginx or apache or cloud technologies like AWS, GCP, docker, etc.) will be beneficial.

• Design and code features for the website application as per the specifications provided by the Product and Design teams.
• Ship features in fast-moving agile sprints.
• Work closely with Backend, Product Design, and Product Management teams to brainstorm and chalk out details of features.
• Ability to build a feature from scratch & drive it to completion

Must have:

• Good understanding of Javascript and Clean architecture.
• Good understanding of asynchronous programming, callback, and closures.
• Strong experience with Javascript frontend framework/libraries like ReactJS
• Understanding of stateless application
• Good knowledge of CSS and its pre-processors like SASS/LESS
• Good understanding of server-side templates.
• Experience with creating cross-browser compatible web apps
• Should be Strong in MySql / Postgres database.
• Stronghold in Data structure and processing JSON

Good to have

• Basic knowledge of CI, CD
• Intermediate knowledge in any cloud services(AWS, GCP)
• Familiar with testing frameworks like Mocha, Cypress

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