React Developer

Job Summary: Wissen Technology is hiring a React Developer to join our dynamic team. The ideal candidate will be responsible for developing and implementing user-centric features on web platforms to enhance overall experience and usability.

Experience: 7+ years

Location: Pune

Mode of Work: Hybrid

Key Responsibilities:

• Develop and implement user-centric features on web platforms to enhance overall experience and usability.
• Collaborate with designers, backend engineers, and product teams to deliver cohesive and scalable products.
• Solve diverse technical and integration challenges by building efficient solutions that connect with automation systems.
• Apply best practices to create reusable, testable, and maintainable components and frameworks.
• Optimize application performance and ensure responsive and adaptive design across multiple devices and browsers.

Qualifications and Required Skills:

• Strong understanding of modern front-end development frameworks and architecture.
• Hands-on experience building interactive, high-performance web applications.
• Proficiency with:
• React, Redux, HTML, CSS, JavaScript
• Build tools like Vite, CSS preprocessors such as Less/Sass
• Solid grasp of UI/UX principles, responsive design, and accessibility standards.
• Experience integrating front-end solutions with REST APIs or automation systems is a plus.
• Strong problem-solving skills and a collaborative mindset.

Wissen Sites:

• Website: www.wissen.com
• LinkedIn: https://www.linkedin.com/company/wissen-technology
• Wissen Leadership: https://www.wissen.com/company/leadership-team/
• Wissen Live: https://www.linkedin.com/company/wissen-technology/posts/feedView=All
• Wissen Thought Leadership: https://www.wissen.com/articles/

If you have any more details to add or need further assistance, feel free to contact

Job Description – Java Developer

Role: Java Developer

Location: Pune / Mumbai

Experience: 5 to 10 years

Required Skills:

We are looking for an experienced Java Developer with strong expertise in Core Java, Spring, Spring Boot, and Hibernate. The candidate should have solid experience in designing, developing, and deploying enterprise-grade applications, with strong understanding of OOPs concepts, data structures, and algorithms. Hands-on experience with RESTful APIs, Microservices, and Database technologies (MySQL/Oracle/SQL Server) is essential.

The ideal candidate should be well-versed in version control systems (Git), build tools (Maven/Gradle), and CI/CD pipelines (Jenkins). Exposure to cloud platforms (AWS/Azure/GCP) and containerization (Docker/Kubernetes) will be a strong plus.

Key Responsibilities:

• Design, develop, and maintain scalable and high-performance applications.
• Write clean, reusable, and efficient code following best practices.
• Collaborate with cross-functional teams to deliver quality solutions.
• Perform code reviews, debugging, and performance tuning.
• Ensure application security, reliability, and scalability.

Good To Have Skills:

• Knowledge of front-end technologies (JavaScript, Angular/React).
• Familiarity with Agile/Scrum methodologies.
• Strong problem-solving and analytical skills.

We are seeking a highly skilled React JS Developer with exceptional DOM manipulation expertise and real-time data handling experience to join our team. You'll be building and optimizing high-performance user interfaces for stock market trading applications where milliseconds matter and data flows continuously.

The ideal candidate thrives in fast-paced environments, understands the intricacies of browser performance, and has hands-on experience with WebSockets and real-time data streaming architectures.

Key Responsibilities

Core Development

• Advanced DOM Operations: Implement complex, performance-optimized DOM manipulations for real-time trading interfaces
• Real-time Data Management: Build robust WebSocket connections and handle high-frequency data streams with minimal latency
• Performance Engineering: Create lightning-fast, scalable front-end applications that process thousands of market updates per second
• Custom Component Architecture: Design and build reusable, high-performance React components optimized for trading workflows

Collaboration & Integration

• Work closely with traders, quants, and backend developers to translate complex trading requirements into intuitive interfaces
• Collaborate with UX/UI designers and product managers to create responsive, trader-focused experiences
• Integrate with real-time market data APIs and trading execution systems

Technical Excellence

• Implement sophisticated data visualizations and interactive charts using libraries like Chartjs, TradingView, or custom D3.js solutions
• Ensure cross-browser compatibility and responsiveness across multiple devices and screen sizes
• Debug and resolve complex performance issues, particularly in real-time data processing and rendering
• Maintain high-quality code through reviews, testing, and comprehensive documentation

Required Skills & Experience

React & JavaScript Mastery

• 5+ years of professional React.js development with deep understanding of React internals, hooks, and advanced patterns
• Expert-level JavaScript (ES6+) with strong proficiency in asynchronous programming, closures, and memory management
• Advanced HTML5 & CSS3 skills with focus on performance and cross-browser compatibility

Real-time & Performance Expertise

• Proven experience with WebSockets and real-time data streaming protocols
• Strong DOM manipulation skills - direct DOM access, virtual scrolling, efficient updates, and performance optimization
• RESTful API integration with experience in handling high-frequency data feeds
• Browser performance optimization - understanding of rendering pipeline, memory management, and profiling tools

Development Tools & Practices

• Proficiency with modern build tools: Webpack, Babel, Vite, or similar
• Experience with Git version control and collaborative development workflows
• Agile/Scrum development environment experience
• Understanding of testing frameworks (Jest, React Testing Library)

Financial Data Visualization

• Experience with financial charting libraries: Chartjs, TradingView, D3.js, or custom visualization solutions
• Understanding of market data structures, order books, and trading terminology
• Knowledge of data streaming optimization techniques for financial applications

Nice-to-Have Skills

Domain Expertise

• Prior experience in stock market, trading, or financial services - understanding of trading workflows, order management, risk systems
• Algorithmic trading knowledge or exposure to quantitative trading systems
• Financial market understanding - equities, derivatives, commodities

Technical Plus Points

• Backend development experience with GoLang, Python, or Node.js
• Database knowledge: SQL, NoSQL, time-series databases (InfluxDB, TimescaleDB)
• Cloud platform experience: AWS, Azure, GCP for deploying scalable applications
• Message queue systems: Redis, RabbitMQ, Kafka, NATS for real-time data processing
• Microservices architecture understanding and API design principles

Advanced Skills

• Service Worker implementation for offline-first applications
• Progressive Web App (PWA) development
• Mobile-first responsive design expertise

Qualifications

• Bachelor's degree in Computer Science, Engineering, or related field (or equivalent professional experience)
• 5+ years of professional React.js development with demonstrable experience in performance-critical applications
• Portfolio or examples of complex real-time applications you've built
• Financial services experience strongly preferred

Why You'll Love Working Here

We're a team that hustles—plain and simple. But we also believe life outside work matters. No cubicles, no suits—just great people doing great work in a space built for comfort and creativity.

What We Offer

💰 Competitive salary – Get paid what you're worth

🌴 Generous paid time off – Recharge and come back sharper

🌍 Work with the best – Collaborate with top-tier global talent

✈️ Adventure together – Annual offsites (mostly outside India) and regular team outings

🎯 Performance rewards – Multiple bonuses for those who go above and beyond

🏥 Health covered – Comprehensive insurance so you're always protected

⚡ Fun, not just work – On-site sports, games, and a lively workspace

🧠 Learn and lead – Regular knowledge-sharing sessions led by your peers

📚 Annual Education Stipend – Take any external course, bootcamp, or certification that makes you better at your craft

🏋️ Stay fit – Gym memberships with equal employer contribution to keep you at your best

🚚 Relocation support – Smooth move? We've got your back

🏆 Friendly competition – Work challenges and extracurricular contests to keep things exciting

We work hard, play hard, and grow together. Join us.

About RARA NOW

Not just a delivery company

RARA NOW is revolutionizing instant delivery for e-commerce in Indonesia through data-driven logistics.

RARA NOW is making instant and same-day deliveries scalable and cost-effective by leveraging a differentiated operating model and real-time optimisation technology. RARA makes it possible for anyone, anywhere to get same-day delivery in Indonesia. While others are focusing on - one-to-one- deliveries, the company has developed proprietary, real-time batching tech to do - many-to-many- deliveries within a few hours. RARA is already in partnership with some of the top eCommerce players in Indonesia like Blibli, Sayurbox, Kopi Kenangan, and many more.

We are a distributed team with the company headquartered in Singapore, core operations in Indonesia, and a technology team based out of India.

Future of eCommerce Logistics:

Data-driven logistics company that is bringing in same-day delivery revolution in Indonesia

Revolutionising delivery as an experience

Empowering D2C Sellers with logistics as the core technology

About the Role:

3+ years of experience in frontend technologies and progressive web applications development

Expert in using of design patterns, data structures and algorithms

Should have sound understanding of design architecture and principles, coding frameworks like react.js, angular.js, vue.js, node.js, next, js, express.js etc.

Experience with popular JS libraries like Ember, Babel, Typescript, Webpack, Socket etc.

Solid understanding of object-oriented design and programming concepts, core JavaScript concepts like scope/closures, the event loop and asynchronous callbacks, promises

Strong proficiency in JavaScript, AJAX, HTML5 CSS3 JSON, including DOM manipulation and the JavaScript object model

Translating designs and wireframes into high-quality code

Knowledge of Redux, React.js and its core principles

Good experience on Web Service Integration ( REST, JSON, XML), Cloud technologies - AWS, FCM

Proficient with debugging and testing tools to troubleshoot and optimize the UI

Exposure to scm tools like git, CI/CD of android systems, code coverage tools like SonarQube, etc.

Good to know hybrid platforms like Cordova, Ionic, React Native, Flutter, etc

Bachelor degree in Computer Science or related discipline preferred

As someone who will be a part of our team, your understanding of the product and our customers will be incredibly valuable.

Skills Required

• Thorough understanding of React.js and its core principles.
• Experience with popular state management tool -Redux
• Experience with HTTP based packages like Axios.
• GIT experience is a plus

About You

• You take initiative and ownership to see things through to completion. If it needs doing, you do it.
• You’re eager to take on challenges. When you don’t know something, you embrace the chance to grow and get better.
• We work together as a team, and that means we encourage each other to improve as a team. You are self-sufficient and love the challenge of solving problems and learning new things

As a React.js Developer, you will be involved from conception to completion with projects that are technologically sound and aesthetically impressive.

Benefits:

• Food allowance
• Leave encashment
• Paid sick time

• Determining the structure and design of web pages.
•  Building reusable and efficient code for future use.
•  Ensuring web design is optimized for smartphones.
•  Use markup languages like HTML to create user-friendly web pages.
•  Maintain and improve the website.
•  Optimize applications for maximum speed.
•  Collaborate with back-end developers and web designers to improve usability.
• Stay up-to-date on emerging technologies.