senior javascript engineer

Confiz

<div><p>We&rsquo;re looking for a skilled <b>Senior React Engineer</b> to join our front-end team and help build high-quality, scalable, and accessible web applications. The ideal candidate has hands-on experience working with modern component libraries, design systems, and understands how to translate design concepts from Figma into reusable, performant UI components.</p>
<p><b>Key Responsibilities</b></p>
<ul><li>Develop and maintain scalable, reusable React components and front-end features.</li>
<li>Work closely with designers to translate Figma designs into interactive, pixel-perfect UI.</li>
<li>Implement and contribute to the company&rsquo;s <b>design system</b> using libraries such as <b>Chakra UI, Material UI, or custom-built solutions</b>.</li>
<li>Manage <b>design tokens</b> and maintain consistency between design and code through Figma integration.</li>
<li>Ensure compliance with <b>web accessibility (WCAG)</b> standards and best practices.</li>
<li>Build responsive, cross-browser compatible interfaces.</li>
<li>Optimize performance and maintainability of front-end code.</li>
<li>Collaborate with backend developers and product teams to define API requirements and integration flows.</li>
<li>Participate in code reviews, ensuring code quality and adherence to best practices.</li>
</ul>
<p><b>Required Skills &amp; Qualifications</b></p>
<ul><li><b>3+ years</b> of professional experience developing front-end applications using <b>React.js</b> and modern JavaScript (ES6+).</li>
<li>Strong understanding of <b>React Hooks</b>, <b>Context API</b>, and component-driven architecture.</li>
<li>Experience working with <b>Chakra UI</b>, <b>Material UI</b>, or <b>custom component libraries/design systems</b>.</li>
<li>Knowledge of <b>design tokens</b> and how to integrate them with design tools such as <b>Figma</b>.</li>
<li>Good understanding of <b>WCAG accessibility standards</b> and <b>responsive design principles</b>.</li>
<li>Familiarity with <b>TypeScript</b>, <b>Redux Toolkit</b>, or <b>React Query</b> is a plus.</li>
<li>Experience using <b>Git</b>, <b>CI/CD pipelines</b>, and modern build tools (Vite, Webpack, etc.).</li>
<li>Strong collaboration and communication skills.</li>
</ul>
<p>We have an amazing team of 700+ individuals working on highly innovative enterprise projects &amp; products. Our customer base includes Fortune 100 retail and CPG companies, leading store chains, fast-growth fintech, and multiple Silicon Valley startups.</p>
<p>What makes Confiz stand out is our focus on processes and culture. Confiz is ISO 9001:2015, 27001:2013 &amp; 20000-1:2018 certified. We have a vibrant culture of learning via collaboration and making the workplace fun.</p>
<p>People who work with us work with cutting-edge technologies while contributing success to the company as well as to themselves.</p>
<p>To know more about Confiz Limited, visit: https://www.linkedin.com/company/confiz-pakistan/</p></div>

Senior React Engineer

Washmen

<div><div><b>We&rsquo;re looking for a Senior React Native engineer (7+ years) who&rsquo;s solved real mobile platform challenges in </b><b>production.</b></div><div></div><div><br>
At Washmen, our customer app isn&rsquo;t just another e-commerce interface&mdash;it&rsquo;s a high-volume, multi-service platform processing thousands of daily orders with complex orchestration requirements. We need someone who&rsquo;s already debugged production memory issues with native profilers, built custom bridges when off-the-shelf solutions failed, and made architectural decisions that scaled.</div><div></div><div><b><br>
What we&rsquo;re NOT looking for:</b> Junior developers eager to learn React Native, or web developers transitioning to mobile.</div><div></div><div><b><br>
What we ARE looking for:</b> Engineers who&rsquo;ve shipped apps with published App Store/Play Store experience, can immediately contribute to discussions around performance optimization, native module development, and mobile-specific constraints.</div><div></div><div><br>
If you&rsquo;ve led mobile architecture decisions in production environments and have battle scars from React Native at scale&mdash;let&rsquo;s talk.</div><div></div><div><b><br>
Job Description:Responsibilities</b></div><div>
Design and build high-performance mobile applications using React Native for iOS and Android.</div><div>
Build and maintain custom native modules in Swift/Objective-C (iOS) and Kotlin/Java (Android) when JavaScript isn&rsquo;t enough.</div><div>
Debug and optimize native-level performance issues using Xcode Instruments and Android Studio Profiler. Handle crashes, memory leaks, and platform-specific problems.</div><div>
Integrate third-party native SDKs and handle OS updates across both platforms.</div><div>
Manage API integration (REST/GraphQL) and state management using React Query, with focus on caching and error handling.</div><div>
Translate designs into pixel-perfect UIs that work seamlessly on both platforms.</div><div>
Write testable code with unit, integration, and E2E tests (Jest, Appium).Mentor teammates through code reviews and pair programming.</div><div></div><div><b><br>
Required Skills</b></div><div><b>
Native Expertise (Critical):</b></div><div>
Solid iOS (Swift/Objective-C) and Android (Kotlin/Java) fundamentals</div><div>
7+ Experience building custom native modules and React Native bridges</div><div>
Deep understanding of React Native architecture (New Architecture, JSI, Turbo Modules)</div><div>
Strong debugging skills with native profilers and crash analysis tools</div><div></div><div><b><br>
React Native:</b></div><div>
Expert-level React Native development</div><div>
TypeScript, React Query, and modern state management</div><div>
Performance optimization and memory management</div><div>
Mobile-specific constraints (battery, network, memory)</div><div><b>
Other:</b></div><div>
API integration (REST/GraphQL)</div><div>
Testing frameworks (Jest, React Testing Library, Detox)</div><div>
Design implementation from Figma</div><div>
App Store/Play Store release process</div><div>
Security best practices (OWASP, secure storage)</div>
<p>
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.</p></div>

Senior React Native Engineer

myZoi

<div><span style="font-size: 11px;"><b>The Role</b></span></div><div><span style="font-size: 11px;"><br></span></div><div><span style="font-size: 11px;">You will be forming a squad with a mission to build and deliver a world class application to our global customer base. You will be challenged to deliver software that is highly functional yet simple, feature rich yet low latency and overall best of breed using typescript and react native. You will experiment with TS, JS, React, SSR, styling and delivery techniques to challenge and improve our application and delivery across diverse regional requirements. You will be fully agile and fully empowered. You will be an innovator and a mentor. You will work with a hybrid local and overseas team with best-in-class tools and processes.</span></div><div><span style="font-size: 11px;"><br></span></div><div><span style="font-size: 11px;"><b>Responsibilities</b></span></div><div><span style="font-size: 11px;"><br></span></div><div><span style="font-size: 11px;">Build, deliver and support React and React native applications for a new and exciting product</span></div><div><span style="font-size: 11px;">Build and test components that are reusable and accessible</span></div><div><span style="font-size: 11px;">Build component libraries to empower engineers to provide first class branded experiences</span></div><div><span style="font-size: 11px;">Optimise the application delivery - size, latency, reliability</span></div><div><span style="font-size: 11px;">Maximise compatibility and network considerations</span></div><div><span style="font-size: 11px;">Collaborate with the team to architect, review and propose solutions</span></div><div><span style="font-size: 11px;">Work on continuously improving the application delivery processes</span></div><div><span style="font-size: 11px;">Be an awesome member of the team, have fun and enjoy social events</span></div><div><span style="font-size: 11px;"><b><br></b></span></div><div><span style="font-size: 11px;"><b>About You</b></span></div><div><span style="font-size: 11px;"><br></span></div><div><span style="font-size: 11px;">You are a skilled, creative and inquisitive engineer with a passion for quality and delivery</span></div><div><span style="font-size: 11px;">You have hands on experience of front end and mobile development using react native</span></div><div><span style="font-size: 11px;">You have an appreciation of high quality shared components, styling and presentation</span></div><div><span style="font-size: 11px;">You have knowledge across build tools, optimisation techniques and modern frameworks</span></div><div><span style="font-size: 11px;">You have strong communication skills, curiosity and are a quick learner</span></div><div><span style="font-size: 11px;">You enjoy a creative fast paced agile world</span></div><div><span style="font-size: 11px;">You enjoy mentoring and teaching other developers to create a world class cohesive team</span></div><div><span style="font-size: 11px;">You enjoy making friends, having fun</span></div><div><span style="font-size: 11px;"><b><br></b></span></div><div><span style="font-size: 11px;"><b>Skills</b></span></div><div><span style="font-size: 11px;"><br></span></div><div><span style="font-size: 11px;">Advanced modern React native experience across Android, iOS, Huawei</span></div><div><span style="font-size: 11px;">React framework and tools, Redux, RTK</span></div><div><span style="font-size: 11px;">Strong Typescript and Javascript experience</span></div><div><span style="font-size: 11px;">Swift, Java, Kotlin</span></div><div><span style="font-size: 11px;">Skilled in Styling techniques</span></div><div><span style="font-size: 11px;">Appreciation of building quality shared components</span></div><div><span style="font-size: 11px;">Working experience in Javascript, Typescript, Android, iOS build and deployments through to production and app stores</span></div><div><span style="font-size: 11px;">Experience with responsive and adaptive design</span></div><div><span style="font-size: 11px;">Server Side Rendering Techniques, package and delivery optimisation for adverse scenarios</span></div><div><span style="font-size: 11px;">Unit, End-to-end and UX testing frameworks and techniques</span></div><div><span style="font-size: 11px;">Appreciation of high application security and compliance</span></div><div><span style="font-size: 11px;">Great design and communication skills and a team player</span></div><div><span style="font-size: 11px;">Knowledge of agile delivery</span></div><div><span style="font-size: 11px;">Bonus Skills</span></div>

Senior Frontend and Mobile Engineer

tabby

<div><span style="font-size: 13px;">We re looking for a </span><strong style="font-size: 13px;">Senior FullStack Engineer</strong><span style="font-size: 13px;"> to help scale the systems behind Tabby s core products. You ll work on high-impact projects in a high-growth environment, alongside a world-class remote engineering team spread across 20+ countries.</span></div> <ul> <li> Strong Backend coding ability (ideally with Golang); however, we are open to any language as long as you are open to learn Golang.</li> <li> 5+ years as a Backend or Fullstack Engineer at a fast-growing product company</li> <li> 2+ years of experience with ideally both Golang and TypeScript with React</li> <li> Solid experience with SQL DBs</li> <li> Profound experience with partner APIs integration and product development</li> <li> A passion for writing clean and testable code</li> <li> Fluent English level (B2+)</li> <li> And, of course, you should be proactive, enthusiastic, and independent.</li></ul>

Senior Fullstack Engineer

Stella Stays

This is a remote position.Who we areAt Stella Stays, we re not just another hospitality brand - we re building the future of living. We ve reimagined what it means to feel at home, creating tech-driven, beautifully designed spaces that people actually want to live in, whether for a few days or a few months.We started in 2019 with a bold vision, and in just a few years, we became leaders in the space, disrupting traditional hospitality with a fresh, forward-thinking approach. Our fully furnished homes across MENA are seamlessly bookable online, ready for instant move-in, and packed with everything from high-speed WiFi to world class amenities. No paperwork, no hassle - just modern, effortless living.Behind this vision is a team of ambitious, fast moving people who thrive in a high-growth environment. We think big, move fast, and build what s never been built before - together.If you re looking for a place where you can make things happen, grow your career, and be part of something truly game-changing, you ve found it. Welcome to the future. Welcome to Stella Stays.At Stella Stays, you will:We're on the lookout for a Senior Frontend Engineer who lives and breathes React.js. You ll be joining a product-driven, design-loving team that thrives on crafting seamless experiences across devices and platforms. This isn t just another feature factory, we care deeply about usability, maintainability, and performance. What you ll do: Build modern, elegant, and responsive UIs using React.js, working closely with design and backend teams Create reusable components and front-end libraries for speed, scalability, and sanity Turn wireframes and mockups into high-performance, pixel-perfect code Optimize everything, from page load time to dropdown on mobile Write clean, testable, and maintainable code (and help others do the same!) Drive code reviews, mentor junior devs, and be a key voice in technical decisions Collaborate with stakeholders and team members across time zones and functions Constantly hunt for improvements in performance, UX, and developer experience Requirements Solid command of JavaScript, the DOM, and React.js (including internals) Experience with Redux (or other modern state management), TypeScript, and Next.js A deep understanding of RESTful APIs, and bonus points if you re handy with GraphQL Git mastery and comfort working with modern front-end build tools like Webpack, Vite, or Babel An eye for design and the little details that make big UX differences Strong understanding of frontend architecture, security best practices, and performance Experience writing unit/integration tests and care about code quality Comfortable switching contexts and juggling priorities without breaking a sweat Bonus points if: You ve worked in fast-paced startups or global remote teams You can show us a portfolio, GitHub profile, or a side project you're proud of You ve got opinions about frontend frameworks and aren t afraid to back them up We re reinventing living spaces across the world, beautifully designed, tech-enabled, and ready for modern living. We re a team of builders, dreamers, and disruptors. If you re ready to code with purpose and see the real-world impact of your work, let s chat.

Senior Front End Engineer

Bit Canny Technologies Pvt. Ltd.

<p><b>Job Title :- Senior React JS Developer</b></p><p><b>Location :- </b>Lords Building, Lords Sinha Road, Kolkata &ndash; On-site (Monday to Friday)</p><p><b>Employment Type :- </b>Full Time (Office Hours: Monday to Friday)</p><p><b>Experience Required :-</b> Minimum <b>3 years</b> of professional experience in front-end development with React.js (or equivalent) required.</p><p><b>Role Summary :-</b></p><p>We are looking for a highly skilled and motivated Senior React JS Developer to join our team at our Kolkata office. In this role you&rsquo;ll be responsible for developing robust, scalable and high-quality web applications using React.js. You&rsquo;ll collaborate closely with product, UX/UI, backend teams and assist in building user-facing features, reusable components, and optimizing performance and user experience.</p><p><b>Key Responsibilities :-</b></p><ul><li>Design, develop, test and deploy web applications and features using React.js and related front-end technologies (JavaScript/ES6+, HTML5, CSS3).</li><li>Build reusable UI components and front-end libraries for future use.</li><li>Translate design wireframes and prototypes into high-quality code with optimal performance across devices and browsers.</li><li>Collaborate with backend engineers to integrate RESTful APIs or GraphQL endpoints.</li><li>Work with UX/UI designers and product managers to conceptualise and implement intuitive user interfaces.</li><li>Optimize application performance (rendering, load time, responsiveness) and ensure best practices in front-end architecture.</li><li>Conduct code reviews, provide constructive feedback to other developers, mentor junior team members.</li><li>Maintain and improve existing code base: refactor, debug, resolve performance bottlenecks.</li><li>Stay up to date with latest front-end trends, tools, frameworks, and propose improvements to the tech stack and workflow.</li><li>Participate in agile development process: sprint planning, stand-ups, retrospectives.</li></ul><p><b>Required Skills &amp; Qualifications :-</b></p><ul><li>Bachelor&rsquo;s degree in Computer Science, Engineering or a related discipline &ndash; or equivalent professional experience.</li><li>Minimum of 3 years of experience in front-end development, with substantial hands-on experience using React.js.</li><li>Strong proficiency in JavaScript (ES6+), including DOM manipulation, object model, functional programming concepts.</li><li>Solid experience with React core concepts (components, state, props, hooks, context, lifecycle).</li><li>Experience with state management patterns/libraries such as Redux, Context API or equivalent.</li><li>Skilled in HTML5, CSS3 (including preprocessors such as SASS/LESS) and responsive/adaptive design.</li><li>Familiarity with build tools and bundlers (Webpack, Babel, npm/yarn) and version control (Git).</li><li>Experience integrating front-end with RESTful APIs (or GraphQL) and working with JSON.</li><li>Good understanding of cross-browser compatibility, performance tuning, web accessibility (WCAG) and responsive design best practices.</li><li>Excellent problem-solving skills, attention to detail, ability to work independently and as part of a team.</li><li>Strong communication skills and ability to work with cross-functional teams.</li></ul><p><b>Preferred (Nice to Have) :-</b></p><ul><li>Experience with TypeScript in a React environment.</li><li>Familiarity with testing frameworks/tools such as Jest, React Testing Library, Cypress.</li><li>Experience with UI component libraries (Material-UI, Ant Design, Tailwind CSS) or design systems.</li><li>Understanding of CI/CD pipelines, agile methodologies (Scrum/Kanban).</li><li>Knowledge of Node.js or backend fundamentals, micro-frontends, SSR (Next.js).</li><li>Previous experience mentoring or leading a small team.</li></ul><p><b>Work Schedule &amp; Location Notes :-</b></p><ul><li>This is an on-site role at our Kolkata office (Lords Building, Lords Sinha Road).</li><li>Work days: Monday to Friday.</li><li>Standard office hours; however, occasional flexibility during project deliveries may be required.</li></ul><p><b>What We Offer :-</b></p><ul><li>Opportunity to work on meaningful projects in a collaborative environment.</li><li>Professional development&mdash;we encourage staying updated with trends/tech and will support learning.</li><li>A dynamic team and office location in central Kolkata (Lords Sinha Road).</li><li>Competitive compensation (to be discussed) and benefits as per company policy.</li></ul><p>Job Types: Full-time, Permanent</p><p>Pay: From &#8377;40,000.00 per month</p><p>Work Location: In person</p>

Senior React JS Developer

Binance

<div> <b>Responsibilities</b> <ul> <ul> <li>Design, develop, and maintain frontend applications for exchange platforms to ensure optimal user experience.</li> <li>Work closely with design, backend, and product teams to understand business requirements and translate them into actionable frontend solutions.</li> <li>Design and implement security and performance optimizations to ensure stable operation of the exchange platform.</li> <li>Work with Web3 frameworks and libraries such as Ethers.js , Web3.js , or Wagmi.</li> <li>Stay updated on trends in DeFi, DEXs, on-chain trading technologies</li> </ul> </ul> </div> <div> <b>Requirements</b> <ul> <ul> <li>Master of JavaScript and NodeJS.</li> <li>5+ years of designing and implementing JavaScript frameworks and libraries. </li> <li>Master of server-side NodeJS framework development and server-side rendering.</li> <li>Deep understanding of the underlying mechanism of popular UI rendering frameworks, such as React or Vue.</li> <li>Deep understanding of Web performance optimization and error monitoring.</li> <li>Developing toolkits to improve frontend dev efficiency and quality, deep understanding of ESbuild, Webpack, Parcel, Vite, etc.</li> <li>Experience with blockchain-related frontend libraries (e.g., Web3.js , Ethers.js ).</li> <li>Understanding of blockchain technology, Ethereum ecosystem, and smart contract interactions.</li> <div>Preferred qualifications:</div> <li>Core developer of some popular open-source projects.</li> <li>Have experience of building Web3 App and on-chain trading</li> </ul> </ul> </div>

Senior Frontend Engineer - Cloud

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