Wolken Software - UI Developer/Angular Lead - JavaScript/TypeScript

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.

• Experience on Angular 7+
• Experience of SCSS, Type script
• Knowledge of API integration
• Experience of npm package repository
• Experience of Git
• Experience of html, CSS, JS, JQuery and BootStrap

Note:- Angular developer with any combination will do for eg- Angular Dev with PHP, Angular Dev with Java or dotnet will also do. They should have worked on Angular 6 or any version above that

Responsibilities:
• Modify existing WordPress and partner portal sites to spec and design
• Build new website landing pages for marketing campaigns
• Update or integrate existing CRM or marketing automation systems within websites and portals
• WordPress administration including core, theme plugin, updates, testing etc.
• Manage all technical aspects of websites including optimal performance and security

LogiNext is looking for a technically savvy and experienced Engineering Leader to take up front-end development efforts. You will design and develop elegant interfaces that exceed client expectations in terms of value and benefit. You will collaborate on scalability issues involving visualizing massive amounts of data and information. You will identify, define and communicate best practices for front end.

You are passionate about building secure, high-performing and scalable front-end applications. Your design intuition inclines towards usability, elegance and simplicity. You are biased towards open-source tools and existing frameworks. You have demonstrated strong inter-personal and communication skills.

Responsibilities

• Lead and direct UI/UX team, define software architecture, collaborate with other teams to explore existing systems, determine areas of complexity and potential risks to successful implementation of advanced visualization products
• Define software architecture, collaborate with other teams to explore existing systems, determine areas of complexity and potential risks to successful implementation of advanced visualization products
• Translate wireframes into functional requirements, write well-abstracted, reusable, high-performance code for UI components
• Work closely with design, product management and development teams to create elegant, usable, responsive and interactive interfaces
• Contribute to continual improvement by suggesting improvements to user interface, software architecture or new technologies
• Optimize web applications to maximize speed and scale. Support diverse clients from high-powered desktop computers to low-end mobile devices
• Understand and coach/teach others, show a high level of ethics and team-work

 Requirements

• Bachelor/Master’s degree in Computer Science, Information Technology or a related field
• 10+ years of experience in developing responsive, elegant, efficient and cross-browser front-end applications
• Hands on experience on various MVC frameworks, UI libraries and tools such as Angular, ReactJS, HTML5, CSS3, D3.js
• Hands on experience on Map API’s like Google Maps, Openstreetmap and other powerful information-rich maps
• Familiar with UX processes and design
• Proven ability to drive large scale projects with deep understanding of Agile SDLC, high collaboration and leadership
• Excellent written and oral communication skills, judgment and decision making skills

Responsibilities:

• Work on design and develop scalable solutions using efficient Design Patterns
• Adept in handling Non-functional requirements (performance etc.)
• Excellent aesthetic capability with UX designing and development experience
• Have a good understanding of all aspects of the application like rendering big datasets, fetching data using and authentication.
• Identify improvement areas within the application and work to implement the same
• Flexibility in adapting to team requirements

Requirements:

• Comprehensive knowledge of UX and responsive UI design with an emphasis on intuitive design
• Ability to write cross-browser and standards-compliant code that meets flexibility, scalability, and performance requirements
• Highly skilled at front-end engineering using a client-side technology stack including AngularJS, JQuery, HTML, CSS
• 5+ experience in Angular developing responsive Single Page application
• Experience working with REST API
• Experience working with JSON
• Experience with SVN/Git, Node.JS
• Knowledge of Agile and/or SCRUM methodologies
• Dedicated, self-driven and willing to take responsibility and ownership of the application
• Strong Problem identifying and solving ability and excellent communication skills

Job Type: Full Time, Onsite

Recro is a developer-focused platform that was founded with the aim of seamlessly matching individual expertise with the right opportunities.

We empower talented developers by providing them with relevant experience at fast-growing startups based on technical competencies and aspirations. These opportunities have a significant impact on their career success and help them become their best self.

We are looking for a good JavaScript developer who is proficient with React.js. Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important.

Responsibilities

• Developing new user-facing features using React.js
• Building reusable components and front-end libraries for future use
• Translating designs and wireframes into high-quality code
• Optimizing components for maximum performance across a vast array of web-capable devices and browsers

Skills:

• 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 isomorphic React is a plus
• Familiarity with RESTful APIs
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• Familiarity with modern front-end build pipelines and tools
• Ability to understand business requirements and translate them into technical requirements
• A knack for benchmarking and optimization
• Familiarity with code versioning tools (such as Git, SVN, and Mercurial)

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

Hands-on experience in React.js  and Good understanding of core concepts

Hands-on experience in state management libraries like Redux.

Hands-on experience in HTML5 & CSS3 and JavaScript.

Experience integrating with Restful web services

Proficient with ES6/7/8 syntax and concepts

Proficient knowledge of cross-browser compatibility issues

Knowledge of modern authorization mechanisms, such as JSON Web Token

Experience with common front-end development tools such as Babel, Web pack, NPM.

• 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 for state management (such as Redux/Mobx)
• Familiarity with RESTful APIs 
• Knowledge of modern authorization mechanisms, such as JSON Web Token
• Familiarity with modern front-end build pipelines and tools
• Experience with common front-end development tools such as Babel, Webpack, NPM, etc. 
• Ability to understand business requirements and translate them into technical requirements 
• A knack for benchmarking and optimization 
• Experience in Python or Java/Kotlin development