Senior Product Engineer-React js

Job Summary

We are seeking a skilled Frontend Developer with expertise in React.js and React Flow to design and implement dynamic, interactive user interfaces. You will be responsible for building scalable web applications and visual workflows that empower users to interact with complex data and processes intuitively.

🛠️ Key Responsibilities

• Develop responsive and high-performance web applications using React.js
• Design and implement interactive flow-based UIs using React Flow
• Collaborate with UX/UI designers to translate wireframes into functional components
• Optimize components for maximum performance across devices and browsers
• Integrate RESTful APIs and manage application state using tools like Redux or Zustand
• Write clean, maintainable, and well-documented code
• Participate in code reviews, testing, and continuous integration processes

✅ Required Skills

• Strong proficiency in JavaScript (ES6+) and React.js
• Hands-on experience with React Flow for building node-based editors or workflow diagrams
• Familiarity with state management libraries (Redux, Zustand, Recoil)
• Experience with HTML5, CSS3, and modern CSS frameworks (e.g., Tailwind, Styled Components)
• Understanding of component lifecycle, hooks, and functional programming
• Knowledge of Git, CI/CD pipelines, and agile development practices

💡 Preferred Qualifications

• Experience with TypeScript
• Familiarity with backend integration (Node.js, GraphQL, etc.)
• Exposure to data visualization libraries (D3.js, Chart.js)
• Understanding of accessibility and performance optimization

• Build performant frontend features using React and Next.js.
• Drive UI architecture decisions to support A/B testing and analytics tracking.
• Implement pixel-perfect designs in collaboration with Design and Product teams..
• Contribute to performance baselining and monitoring for web/mobile platforms.
• Ensure seamless experiences across browsers and devices.
• Own CI/CD workflows for frontend deployment and observability.

Senior developers only

Min 5 years of real experience 

Front End/Web react.js

Remote work

(We prefer individual developers over agencies or IT providers)

We Anju Siima Technologies Private Limited are looking for a Flutter developer who is proficient with dart programming language. Your primary focus will be on developing user interface components and implement them following well known Flutter workflows.

Responsibilities:

• Develop new user interfacing features using Dart / Flutter framework
• Building reusable widget components and front-end libraries/packages for future use
• Maintain existing codebase on repositories
• Translate design and wireframes into high quality code
• Optimising widget components for maximum performance across mobile devices
• Stay updated with emerging technologies and implementing them into the current code base.
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Skills:

• Strong skills in Dart & Flutter
• Experience with understanding of Mobile Application Development Lifecycle
• Familiarity with third party libraries and its integration
• Experience with GIT
• Familiarity with RESTful API’s
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Toplyne is a global SaaS product built to help revenue teams, at businesses with a self-service motion, and a large user-base, identify which users to spend time on, when and for what outcome. Think self-service or freemium-led companies like Figma, Notion, Freshworks, and Slack. We do this by helping companies recognize signals across their - product engagement, sales, billing, and marketing data.

Founded in June 2021, Toplyne is backed by marquee investors and angels (we'll be happy to tell you how much we've raised, and from whom on call). We are building out our founding team as we speak and we'd love to chat with you!

You taking a lot of pride in writing scalable, readable & maintainable code. You have a product bent of mind. You like working in a fast paced environment and ship code most days of the week. You enjoy working cross functionally in a collaborative environment with designers, PM's to build the best product possible. You don't mind getting on customer calls to understand their perspective to build a better product or help them with issues they might be facing.

You're hungry, ready to hustle, and keen to learn!

As a founding member of the core engineering team, you will:

• Work with the founders in co-creating the product with early believers (read: customers)
• Develop massive, complex software systems that scale globally.
• Build and own a substantial part of the product and help build the culture of engineering within Toplyne

• Strong first principles
• Hustle! We're young, lean, and in our early days. You'd have to set up your own shop, work with design customers to find generalisable use cases, and build them out.
• Ability to collaborate with cross-functional teams to build and ship new features
• 2-6 years of experience
• Good understanding and experience working with javascript frameworks such as React.
• Work closely with developers and UX designers to ensure that the presentation layer is implemented in accordance with best above best practices and UX specifications.

• Not looking for a 10x engineer. We are ok if you are 1x but are really good at what you, a good human being & work well in a team.

Senior Front End Engineer (React.js & React Native - Mobile Experience)

Job description

Fulfil’s software engineers develop the next-generation technologies that change how millions of customer orders are fulfilled by merchants. Our products need to handle information at a massive scale. We're looking for engineers who bring fresh ideas from all areas into our technology.

As a Front End software engineer, you will work on the ReactJS & React Native (Mobile Experience) powered user interface used by Fulfil merchants to manage their back-office operations. This is mission critical software and your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux) & React Native (Mobile Experience). You will ensure that these components and the overall application are robust and easy to maintain. In this role, you will be collaborating closely with the rest of the team working on different layers of infrastructure in an international environment. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality are important.

What You’ll Do:

• Collaborate with a small yet extraordinarily talented team of engineers to implement front-end technologies
• Develop new user-facing features using React.js & React Native (Mobile Experience)
• Work closely with the Design and Product teams to translate complex technical workflows into delightful user experiences
• Define how Fulfil builds user interfaces and ensure that we’re utilizing and keeping up with modern web standards
• Continually test, measure, and iterate on the results of your work in the spirit of continuous improvement
• Write clean, reusable, and well-tested front-end code
• Help to bridge the responsibilities of the Product and Engineering teams, spending time with both on the way to launching new products
• Architect efficient and reusable front-end abstractions and systems that drive complex web applications
• Build and contribute to open source projects
• Build reusable components and front-end libraries for future use
• Optimize components for maximum performance across a vast array of web-capable devices and browsers

Requirements

We’re Looking for Someone With:

• 5+ years of experience as an engineer
• Experience in building large-scale web applications in a fast-moving team environment
• A strong understanding of UX and UI design standards
• The perfectionist’s touch on a pragmatist’s deadline: you strive for pixel-perfection and intuitive functionality
• Strong proficiency in JavaScript (2-4 Years of experience), including DOM manipulation and the JavaScript object model
• Thorough understanding of React.js & React Native (Mobile Experience) and its core principles, with experience in popular React.js workflows (such as Flux or Redux) 
• Experience with common front-end development tools such as Babel, Webpack, NPM, etc
• The ability to bring any design to life with HTML and CSS, with cross browser compatibility and accessibility
• Smarts, humility, communication skills, and equal willingness to teach and learn
• Familiarity with RESTful and GraphQL APIs
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• Experience in developing large client side JavaScript applications
• Familiarity with code versioning tools like GIT
• Experience with Javascript testing tools and test automation

Nice to Haves:

• Prior experience at a growth stage Internet/Software company
• Demonstrated work beyond the front-end, experienced in integrating with a wide array of back-end technologies and services (e.g. experience with Python, AngularJS)
• Experience developing large client-side applications and optimizing them for performance
• You can straddle client and server development, creating APIs that drive web apps
• You understand the intricacies of timezones
• Web optimization, performance tools, and load testing
• You maintain or contribute to an open-source project