Web Developer

Position : Full Stack Developer (Node.js + React.js)

Experience : 5+ Years

Location : Gurgaon (Work From Office - 5 Days)

Notice Period : Immediate or within 7 days

Job Description :

We are looking for a highly skilled and passionate Full Stack Developer with strong experience in Node.js and React.js, and a solid understanding of Microservices Architecture.

This is a full-time, on-site opportunity based in Gurgaon, ideal for someone who thrives in a fast-paced development environment.

Mandatory Skills :

Node.js, React.js, JavaScript (ES6+), RESTful APIs, Microservices Architecture, MongoDB/PostgreSQL, Git, HTML5, CSS3, JWT

Key Responsibilities :

• Design, develop, test, and maintain scalable web applications using Node.js (backend) and React.js (frontend).
• Build and integrate RESTful APIs and Microservices in a production-grade environment.
• Participate in code reviews, architecture discussions, and performance optimizations.
• Collaborate with cross-functional teams including UI/UX designers, QA, DevOps, and product managers.
• Write clean, maintainable, and reusable code adhering to best practices.
• Ensure system reliability, security, scalability, and performance.
• Debug and resolve production issues efficiently.

Must-Have Skills :

• 5+ Years of full-stack development experience with Node.js and React.js.
• Strong expertise in JavaScript, ES6+, HTML5, CSS3, and responsive design.
• Solid hands-on experience in Microservices Architecture and containerized services (Docker, Kubernetes is a plus).
• Proficiency in RESTful API development and integration.
• Experience with databases such as MongoDB, PostgreSQL, or MySQL.
• Familiarity with version control tools like Git and CI/CD pipelines.
• Understanding of Agile/Scrum methodologies.

Good to Have :

• Knowledge of authentication/authorization mechanisms (OAuth, JWT).
• Exposure to cloud platforms like AWS, Azure, or GCP.
• Familiarity with testing frameworks such as Jest, Mocha, or Cypress.

Key Responsibilities

Frontend & Extension Development

• Build and maintain highly responsive, modern user interfaces using React.js for web applications, browser extensions, and Electron-based desktop clients.

• Architect and develop modular, reusable UI components using Material-UI (MUI / Joy UI) and styled-components/Emotion.

• Manage complex multi-target build pipelines (Web, Extension, Electron) using Webpack and Craco.

AI Integration & Engineering

• Seamlessly integrate Generative AI capabilities into the frontend, including AI-driven chatbots, contextual AI suggestions, and RAG (Retrieval-Augmented Generation) interfaces.

• Collaborate closely with backend and AI specialists to consume AI-powered REST APIs and WebSocket streams, ensuring fluid and responsive user experiences.

• Implement robust markdown and code rendering (e.g., react-markdown) for rich AI conversational outputs.

Real-Time Data & State Management

• Implement low-latency, real-time communication features using Socket.IO for chat and collaborative functions.

• Efficiently manage complex application state, data fetching, and caching using modern tools like React Query and Axios.

Quality & Collaboration

• Work within a monorepo/workspace structure to maintain distinct client, component, and extension packages.

• Participate in code reviews to maintain high code quality, performance, and enterprise security standards.

• Collaborate with teams using Agile/Scrum methodologies for rapid and structured delivery.

Required Skills:

• Core Languages: Proficiency in JavaScript (ES6+) and TypeScript.

• Frontend Frameworks: Strong, hands-on experience with React.js (Hooks, Context), React Query, and React Router.

• Styling & UI: Deep understanding of HTML5, CSS3, and CSS-in-JS libraries (e.g., styled-components, react-jss). Hands-on experience with MUI (Material UI / Joy UI) is highly preferred.

• Architecture & Build: Experience configuring and optimizing builds with Webpack and Craco. Familiarity with npm workspaces/monorepos.

• Real-time & APIs: Ability to design and implement robust client-side integrations with RESTful APIs and WebSockets (Socket.IO).

• Agile & Workflow: Experience working with Agile and Scrum methodologies.

Preferred/Bonus Skills:

• Experience in building and packaging Browser Extensions and/or Electron applications.

• Genuine curiosity and awareness of Generative AI workflows (e.g., prompt engineering concepts, handling streaming AI responses).

• Experience with rich text editing or markdown rendering in React.

- Design, develop, and maintain full stack web applications using Python (backend) and modern frontend frameworks

- Build and integrate REST APIs; work with databases (SQL/NoSQL)

- Apply AI/ML concepts or tools within applications (e.g., model integration, LLM APIs, data-driven features)

- Collaborate with cross-functional teams on financial/trading platform features

- Write clean, scalable, well-tested code; participate in code reviews

- Troubleshoot and optimize application performance

Responsibilities: 

• Design, code and deliver UI capabilities using Qt that would interact with backend python functionalities seamlessly. 
• Solve critical issues by coding in a hands-on and efficient manner.
• Developed CI/CD pipelines for corporate infrastructure. 
• Extensive hands-on experience developing frontend systems 
• Ability to assess and prioritise architectural components, features and bugs..
• Ability to work in an efficient startup creating innovative technology Qualifications: 
• 3+ years of industry Experience in frontend desktop application design and development. 
• Bachelor/Masters in Computer Science Engineering, other branches of engineering from Tier 1 colleges. 
• Should have a good working knowledge of Qt. 
• Familiarity with front-end technologies (like JavaScript, CSS and HTML5). 
• Strong analytical thinking and problem-solving ability Preferred Skills: 
• Attuned design sense so can collaborate with UX designers and hold high quality bars. 
• Strong Programming Skills in Python. Experience in Image Processing is a bonus 
• Deep hands-on technical expertise in full-stack development. Location: Bangalore Salary: Industry Standard with ESOP.

Relevant work experience in ASP.net, C#

At least 2 years of experience with WCF Services

Very strong C# fundamentals
Has experience in building applications in C#

Experience and proficiency in client-side scripting languages, in particular HTML, CSS, and JavaScript

Experience and proficiency in cloud environment, in particular AWS

Additional skills-

- experience of handling Photon Engine

- knowledge of Scripting language like Python, Shell

- Knowledge of apache web server and php application deployment

- Performance monitoring- apps and cloud infra

Responsibilities

• Use latest processes and technology in order to build scalable, distributed, and

fault-tolerant site/software systems.

• Research and evaluate new methodologies and technologies that improve the quality,

reliability, and performance of the frontend engineering’s site/software development

systems and processes

• Apply usability principles and procedures and optimize builds. Reuse through

documenting common frontend components that save the business time in executing

future projects.

• Emphasize a consumer-focused approach in building sites/software and works with both

senior and junior frontend teams in determining the prioritization and estimation of new

features and improvements.

Requirements/Qualification

• Minimum 6 years experience in software engineering. At least 3 years of frontend

experience working in React with Redux Framework

• Highly proficient in CSS3, HTML5, Javascript. Also proficient in tools like Bootstrap and

Webpack for building products across multiple screen resolutions and browsers.

• Familiarity with cross-browser compatibility issues and demonstrate design and user

interface/user experience skills.

• Excellent time management, multi-tasking and communication skills

Requirement

∙ Proficient in Node.JS and ReactJS development stack

∙ Basic understanding of web technologies including HTML, CSS, JavaScript, AJAX etc.

∙ Passion for best design and coding practices and a desire to develop new bold ideas

∙ Good to have knowledge of AWS, Redis, ElasticSearch

Education: Min. Graduate in related discipline

Cayzen India is working on several software as a service (SAAS) startup ideas for both internally funded startups as well as customers who like leveraging the latest technologies to simplify their business. We are building a startup team in India that is on par with our US team in the quality of talent and challenging work. We are not looking to grow numbers or bodies, we are looking for quality talent with solid engineering fundamentals and inquisitive mind for tough problems.

We are looking to add a full stack developer and data gurus to our team.

Position Responsibilities:

• Good understanding of Agile Scrum in a fast-paced environment
• Develop quality software using the latest full-stack software tools primarily.Net and JavaScript with cloud and mobile as the core
• Experience in building and deploying enterprise-level web-based applications and complex business processes
• Familiar with automated testing and continuous integration methods.
• Build documentation of both business requirements & technical solutions
• Strong architecture and design skills to design or understand design for complex multi-tiered applications
• Ability to understand business requirements and design systems accordingly
• Ability to build working prototypes early in the development life cycle & validate business requirements
• Manage/contribute offshore delivery of projects–ensure on-time delivery, and anticipate and flag potential issues ahead of time
• Ability to mentor development teams in complex technical aspects of applications and guide them through various solutions
• Ability to lead technical reviews of the project, identify potential problems and resolve them

Qualifications and Technical Skills:

• B-Tech/M-tech/MCA
• 3-5 years of experience in building commercial software with.Net framework
• Strong skills in programming with C# ASP.Net/ MVC
• Experience with JavaScript/ jQuery / Angular JS / React  or other similar JavaScript frameworks.
• MS SQL Server / Big Data
• WebServices / Rest/ WCF/WebAPI

Benefits

Cayzen India offers above industry benefits and a startup culture with a small and high talent team. The benefits are above the current industry levels and are open to consideration for the right candidate. The benefits also include being part of a startup team and having the equity and leadership role as the team grows.