- Designing and developing user interfaces using angularJS best practices.
- Adapting interface for modern internet applications using the latest front-end technologies.
- Writing JavaScript, CSS, and HTML.
- Developing product analysis tasks.
- Making complex technical and design decisions for AngularJS projects.
- Developing application codes and unit tests in AngularJS, Java Technologies, and Rest Web Services.
- Conducting performance tests.
- Consulting with the design team.
- Ensuring high performance of applications and providing support.

About Dev Technosys
About
"Dev Technosys is a leading custom software development company known for its bespoke services in the field of custom web development and mobile app development across multiple industry verticals and business niches. It follows the central principle “Bringing IT to Life.” Since its inception, the company has been serving custom-made digital solutions for enterprise setups and SMBs with B2B and B2C solutions."
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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.
- Previous experience working as a node.js developer.
- Extensive knowledge of JavaScript, web stacks, libraries, and frameworks.
- Knowledge of front-end technologies such as HTML5 and CSS3.
- Superb interpersonal, communication, and collaboration skills.
- Exceptional analytical and problem-solving aptitude.
- Great organizational and time management skills.
- Availability to resolve urgent web application issues outside of business hours.
. 3.5+ years of work experience on React.JS framework
· Has expertise in following front- end optimization techniques:
· Lazy Loading
· Asynchronous Module Definition
· Image Compression and Minification
· Other front-end tooling using Grunt / Webpack and NPM
· Familiarity with NodeJS, Jasmine / Karma and other unit testing frameworks
· Foundation data structure – Arrays, dictionaries, sets and lists
· Proficient in evaluating front end performance and measure accordingly
· Strong appetite to learn industry trends and new & emerging technologies
About the company:
NowPurchase is transforming the 140B$ Metal Manufacturing industry. The metal industry forms the backbone of the economy and the fundamental block of the physical world - be it transportation, construction and every machinery. NowPurchase is building a rich, digital marketplace where Metal Manufacturers can procure high quality raw materials in a trusted manner. At the same time we are building the OS (Operating System) that will supercharge their productivity and processes to ultimately make procurement autonomous. Now Purchase raises USD 2.4 million in Nov 2021, led by Orios Venture Partners, InfoEdge Ventures.
About you:
We are looking to add an immensely talented Senior Front End Engineer that will help us invent, design, refine and deliver products that will meet our vision. Expect to build a lot of web interfaces and dashboards both for the browser as well as native IoT enabled terminals that will be placed at the manufacturers' premises. You need to lead the front end team to make sure they are delivering high quality code and are constantly inspired to experiment with tools to push out MVPs.
Roles & Responsibilities:
- You are empowered to work directly with leadership and the product team to make decisions about your code and future of the product.
- Deliver high quality modular code deployed over web, mobile and native IoT enabled terminals that leverage REST-based services and real time sockets.. This would include visual dashboards and real time optimizations that are critical for the manufacturing process.
- Have a strong emphasis on shipping features quickly without sacrificing code quality. Be ready to build a lot of MVPs that will go through iteration or be completely scrapped depending on the outcome at the customer end.
- Own your Agile projects and lead the team from software design to implementation and deployment. Maintain sprints, delivery timelines and contribute to better managing the engineering team.
- Transform UI designs and mockups into pages and flows using CSS3 and JavaScript frameworks. Be ready to do the mockups yourself sometimes.
- Build a culture of simplicity and pragmatism, which is reflected in your elegant code that other developers emulate and you ensure through thorough code reviews and processes.
- Have an exceptional understanding of asynchronous request handling, partial page updates, and service workers and command over the internals of JavaScript, React and Redux.
- Continuously evaluate existing engineering processes and recommend improvements.
Required Skills and qualification:
- 4+ years’ experience developing rich UI/Front-end for user-facing web applications.
- Strong experience with React or similar frameworks, TypeScript, SSR (Server Side Rendering), SPA (Single Page Application), PWA (Progressive Web application), OOP (Object Oriented Programming), Reactive programming, and Unit tests.
- Demonstrated ability to function as a project leader as well as an individual contributor.
- Excellent communication and facilitation skills.
Tech Stack skills required:
- React/Redux
- Python/Django/Celery
- Git, AWS, ELB (Elastic Beanstalk), Netlify
- PostgreSQL/Redis/S3
Location:
On- site: Kolkata, West Bengal
Compensation & Benefits:
- Cash Compensation: As per industry standards & pedigree of candidate
- ESOPs: 10% of NowPurchase is dedicated to current & future team members. Your package would entail some ESOPs so that you own a part of the company and grow along with it.
- Medical Insurance: Benefits of group insurance of 3 lakhs for family including parents, spouse, children
- Generous leave structure and WFHs including Marriage, Maternity & Paternity leaves
- Complete Relocation Expenses: We are building a unicorn out of the city of Joy (Kolkata). We will pay for everything you spend to relocate here.
Company Link: https://nowpurchase.com">https://nowpurchase.com
LinkedIn: https://www.linkedin.com/company/nowpurchase/">https://www.linkedin.com/company/nowpurchase/
The ideal candidate will be responsible for designing, developing, testing, and debugging responsive web and mobile applications for the company. Using React Js, MySQL, JavaScript, HTML, and CSS, this candidate will be able to translate user and business needs into functional frontend design.
Responsibilities
- Must have
- Experience with React and Redux or similar programming
- Experience in Rest API integration
- Passionate about user experience
- Android and IOS development
- Other requirements
- Good knowledge of Javascript functions and operators
- Responsibility for major tasks and chores
- Willing to resolve technical debt in the early step
- Good understanding of sprint cycle in agile
- Can communicate with developers and non-developers
- Can work independently but a great collaborator
- Serverless API experience is not counted
- Good to have Git workflow knowledge
- Good to have Github collaboration experience
Qualifications
- Bachelor's degree or equivalent in Computer Science
- 2+ years experience in frontend development
- Familiarity using Scrum/Agile development methodologies
- Experience building object-oriented web applications in React Js, MySQL, JavaScript, HTML5, and CSS3
We are looking for talented front-end developers who can help us in enabling our customers deliver excellent experiences to end users. As a customer experience management firm , we are constantly enhancing user experiences in several of our customers' online platforms. The role of the front-end development team is crucial in realizing our design solutions without any loss in translation. We are looking for front-end leads who can build and deliver the best in class digital experiences through the right use of frameworks , technologies and code.
Responsibilities
Design and Develop web / mobile applications using front-end technologies such as React,
Angular, CSS , JS , HTML and many more.
Implement applications that have high standards of quality and the best of the performance.
Translate UX / UI designs from our design teams into high quality code without any loss in
translation.
Design and implement optimised components, modules and applications using best practises of front-end development and clean coding standards
Establish continuous quality reviews and best practises to maintain higher levels of coding
standards
Guide the team in building solutions with high standards of quality and performance through technical design reviews
Design API definitions optimised for front-end and work closely with backend team for
integration.
Deliver code with maximum coverage using unit-testing frameworks and testing practises such as TDD .
Optimise code continuously to improve quality , maintainability and performance
Work closely with solutions and architecture teams in solution design and contribute in exploring new frameworks, tools and products
Qualification and Experience
5 to 8 years of experience in front-end development of web / mobile applications with at least 2 yrs as a lead. Experience in backend technology stacks will be an advantage
Requirements
Strong proficiency in JavaScript .Strong skills in HTML , CSS , SCSS and any CSS Frameworks .
Thorough understanding of any front-end frameworks like React , Angular or any other along with its core principles
Experience with data structure libraries , state managements, functional / reactive programming .
Experience with newer specifications of ES6. Experience with RESTful APIs integration
Knowledge of modern authorisation 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. A knack for benchmarking and optimisation
About Moonraft
We are here to advance the human experience through design-driven innovation. Design, to us, is all about creating new meanings, while art is about self-expression and emotive appeal. Bringing these two creative disciplines together and operating at their intersection with business and technology, we drive business innovations with differentiating customer experience. We place the human at the centre, bringing quantitative and qualitative techniques together to develop consumer insights. Our techno-creative team, bridging consumer insights, business understanding, and advanced technology skills, then builds humanistic technology solutions.
We believe experimentation is at the core of every innovation. Radical innovation, in our view, is just an event recognised in hindsight when a number of trial-and-error attempts spark off a breakthrough. Our approach embraces rapid prototyping and empirical evidence in everything we do. As the name says, we are Moonraft Innovation Labs, driving innovation through experimentation.
"Rafters", who inhabit Moonraft, recognize ideas as the boss. They live by imagination, simplicity, and speed. Our egalitarian culture and environment are designed for rafters to thrive and deliver elegant solutions for complex problems.
Skills:
- Minimum 5 years of experience as a Front-end Developer
- Responsive/Mobile Design Skills
- Cross-Browser Development
- JavaScript frameworks like NodeJS, ReactJS etc.
- Front End Frameworks like Bootstrap
- Worked on markup languages like HTML, HTML5
- Worked on JavaScript, CSS and jQuery
- Excellent knowledge of browser troubleshooting and debugging practices and techniques
- Knowledge of some SEO principles
- Knowledge of graphics software such as Adobe Suite, Photoshop etc.
- Sense of ownership and pride in your performance and its impact on company’s success
- Critical thinker and problem-solving skills
- Team player
- Good time-management skills
- Good interpersonal and communication skills
To know more about Srijan Technologies, visit the following:
Website: http://www.srijan.net/">http://www.srijan.net/
Twitter: https://twitter.com/Srijan">https://twitter.com/Srijan
LinkedIn: https://www.linkedin.com/company/srijan-technologies-pvt--ltd-">https://www.linkedin.com/company/srijan-technologies-pvt--ltd-
Facebook: https://www.facebook.com/SrijanOne
- software engineering experience focused on web development.
- Hands on experience in architecting large scale frontend applications.
- Have detailed hands-on experience of cutting edge web technologies (HTML5, CSS, Javascript, TypeScript), Application Servers, Web Applications
- Experience developing UI with JavaScript development frameworks (e.g. React, Angular, Vue, Bootstrap, etc)
- Design and develop cloud native enterprise applications as per the strategic application roadmap of DSP
- Ensure strict adherence to code quality, coding standards and overall deliverable quality as per the defined standards
- Write automated unit and integration tests to ensure defect free code
- Learn and develop proof of concepts with newer technologies when required








