Junior 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.

Job Title: Full Stack Developer (Node.js + React.js)

📍 Location: Gurgaon (On-site)

🕒 Experience: 5+ Years

🕒 Working Days: 5 Days(Mon-fri)

Job Summary:

We are hiring a passionate and experienced Full Stack Developer proficient in Node.js and React.js for our client. The ideal candidate should have solid experience in designing scalable systems, writing optimized code, implementing role-based access control, handling task prioritization, and building robust web applications.

Key Responsibilities:

• Design scalable user management systems with role-based access and authentication.
• Develop backend services and REST APIs using Node.js.
• Build dynamic and optimized front-end applications using React.js and Redux.
• Handle async operations, task queues, and implement retry and prioritization logic.
• Optimize React components for performance using hooks and memoization.
• Ensure secure and scalable system design with proper error handling and authorization flows.
• Apply JavaScript concepts like closures, event loop, and async patterns in real-world scenarios.
• Collaborate with DevOps for basic CI/CD and deployment processes.

Mandatory Technical Skills:

• Frontend: React.js, Redux, JavaScript (ES6+)
• Backend: Node.js, Express.js
• Authentication & Authorization: JWT, OAuth2, Role-Based Access Control (RBAC)
• Task Management: Async/Await, Promises, Retry Mechanisms
• Database: MongoDB or PostgreSQL
• Version Control: Git

Soft Skills:

• Strong problem-solving and system design skills
• Ability to work independently and in a collaborative team
• Clear communication of technical ideas
• Ownership of tasks and components end-to-end

Focus Areas:

• System Design (User Management, Fault Tolerance, Load Distribution)
• JavaScript Core Concepts (Closures, Scope, Event Loop)
• React Optimization & Hooks
• Node.js Architecture & Async Programming
• Task Prioritization and Retry Logic

Note: We are looking for real, hands-on experience—not certifications or copy-paste portfolios. Selected candidates will be given a short real-world task to evaluate skills before interview.

Key Responsibilities

• Design, build, and maintain scalable full-stack applications using MongoDB, Postgresql, Express.js, React.js, and Node.js
• Develop RESTful APIs and integrate them with frontend systems
• Collaborate with designers and project managers for timely project delivery
• Optimize code for performance and scalability
• Troubleshoot, debug, and upgrade applications as needed
• Follow Git-based workflows for version control

Must-Have Skills

• Strong hands-on experience in:
• React.js with hooks, context API, component architecture
• Node.js with Express.js
• MongoDB (CRUD operations, schema design) & Postgresql
• API development and integration
• Strong JavaScript fundamentals (ES6+)
• Basic understanding of deployment (e.g., cPanel, Vercel, Heroku, or VPS)
• Git and GitHub for code versioning

Good-to-Have Skills

• Knowledge of Redux or any other state management tools
• Experience with Next.js or TypeScript
• Familiarity with Tailwind CSS or Material UI
• Experience integrating third-party APIs (e.g., payment gateways, social logins)

Who Should Apply

• You’ve worked on real client projects or have built and shipped working applications.
• You are disciplined and take ownership without constant follow-up.
• You are not here to "fake it till you make it"—you’re here to grow with a real team.

Job Purpose

We work in the latest technology, and our foundations are data structures, algorithms, solid logical reasoning, and mathematics. We are looking for very strong engineers who love coding, optimizing, and ensuring their code is the most efficient.

You will be involved with hardcore development. If you are an assembler of code or packages from different places to build something, you may not find our team to be the right fit.

You must be someone who can build anything from the ground up. Programming language should not be any barrier for you, as you should be able to pick up any programming language or underlying technology within a week.

Key Areas of Responsibility

Core development. Ready to participate in the designing, brainstorming, and development process. You must give sleepless nights to meet deadlines whenever required.

Desired Candidate Profile

Essential Skills 

• Reliable, Accountable, and Trustworthy
• Ability to understand software requirements based on a wireframe/program specification
• Familiarity with GoLang / PHP / Python / Java / C / C++ / Linux Shell and Scripting / HTML / CSS / JS / Node.js is a plus
• Effective communication skills to ensure smooth coordination of tasks with the Team Leader.
• Knowledge of MongoDB, MySQL, and PL/SQL is a plus
• Familiarity with ML, TensorFlow, and Keras is a plus
• Knowledge of web servers such as Apache, NGNIX, and the HTTP protocol is a plus.
• Knowledge of multi-process, threads, memory, and filesystem on Linux is desirable.
• Must Solve The Following

To consider you for the current opening, please make sure to understand the following question and solve it. A simple program in any programing language would do. If you cannot solve this, please do not apply.

Write a function foo(x) where foo(foo(x)) = -x (assume x to be an integer, and foo(x) has to be always real), any programming language would do. Before submitting the answers, please verify that the output of foo(foo(10)) should be -10 and foo(foo(-10)) should be 10.

You will be responsible for architecting and developing features on the application end to end. You will be working closely with the Product Managers and the Technical architect to come up with high-quality, resilient, and highly performant applications.

• Design and develop SaaS-based applications based on microservices architecture.
• Work on the core backend and ensure it meets the performance benchmarks.
• Work on the front end with ReactJS.
• Designing and developing APIs for the front end to consume.
• Constantly improve the architecture of the application by clearing the technical backlog.
• Meeting both technical and consumer needs.
• Staying abreast of developments in web applications and programming languages.

An enthusiastic individual with the following skills. Please do not hesitate to apply if you do not match all of them. We are open to promising candidates who are passionate about their work and are team players.

• Education - BE/MCA or equivalent.
• Overall 4+ years of experience.
• Agnostic/Polyglot with multiple tech stacks.
• Worked on open source technologies – NodeJS, ReactJS, MySQL, NoSQL, MongoDB, DynamoDB.
• Good experience with Front-end technologies like JavaScript frameworks, ReactJS, and AngularJS.
• Backend exposure – good knowledge of building API.
• Worked on serverless technologies.
• Efficient in building microservices in combining server & front-end.
• Knowledge of cloud architecture.
• Should have sound working experience with relational and columnar DB.
• Should be innovative and communicative in approach.
• Will be responsible for functional/technical track of a project.

‍

You will closely work with the engineering team and support the Product Team of Plum.

A wholesome opportunity in a fast-paced environment that will enable you to juggle between concepts, yet maintain the quality of content, interact, and share your ideas and have loads of learning while at work. Work with a team of highly talented young professionals and enjoy the benefits of being at Xoxoday.

Xoxoday is a rapidly growing fintech SaaS firm that propels business growth while focusing on human motivation. Backed by Giift and Apis Partners Growth Fund II, Xoxoday offers a suite of three products - Plum, Empuls, and Compass. Xoxoday works with more than 2000 clients across 10+ countries and over 2.5 million users. Headquartered in Bengaluru, Xoxoday is a 300+ strong team with four global offices in San Francisco, Dublin, Singapore, New Delhi.

We look forward to connecting with you. As you may take time to review this opportunity, we will wait for a reasonable time of around 3-5 days before we screen the collected applications and start lining up job discussions with the hiring manager. We however assure you that we will attempt to maintain a reasonable time window for successfully closing this requirement. The candidates will be kept informed and updated on the feedback and application status.

You will be responsible for architecting, training the team and implementing your solution. You will be working closely with the Product Managers and the tech leads/developers to come up with high-quality, resilient, and highly performant applications.

• Design and develop SaaS-based applications based on microservices architecture.
• Work on core back-end and ensure it meets the performance benchmarks.
• Work on optimizing the middleware and backend technologies to ensure highest scalability.
• Work on best system design principles and ensure high availability.
• Designing and developing APIs for the front end to consume.
• Constantly improve the architecture of the application by clearing the technical backlog.
• Meeting both technical and consumer needs.
• Staying abreast of developments in web applications and programming languages.

An enthusiastic individual with the following skills. Please do not hesitate to apply if you do not match all of it. We are open to promising candidates who are passionate about their work and are team players.

• Education - BE/MCA or equivalent.
• Overall 8+ years of experience.
• Agnostic/Polyglot with multiple tech stacks.
• Worked on open source technologies - NodeJS, Typescript, ReactJS, MySQL, NoSQL, MongoDB, ELK, Kafka, Redis.
• Good experience with Front-end technologies like JavaScript frameworks, ReactJS, AngularJS.
• Back-end exposure - good knowledge of building API.
• Efficient in building microservices in combining server & front-end.
• Knowledge of cloud architecture especially using AWS and its features.
• Should be completely hands on and have the ability to develop quick Prototypes.
• Good understanding of CMS.
• Will be responsible for the functional/technical track of a project.

You will closely work with the engineering team and support the Product Team of Empuls.

A wholesome opportunity in a fast-paced environment will enable you to juggle between concepts yet maintain the quality of content, interact, share your ideas, and have loads of learning while at work. Work with a team of highly talented young professionals and enjoy the benefits of being at Xoxoday.

A fast-growing SaaS commerce company based in Bangalore with offices in Delhi, Mumbai, SF, Dubai, Singapore, and Dublin. We have three products in our portfolio: Plum, Empuls, and Compass. Xoxoday works with over 1000 global clients. We help our clients engage and motivate their employees, sales teams, channel partners, or consumers for better business results.

We look forward to connecting with you. As you may take time to review this opportunity, we will wait for a reasonable time of around 3-5 days before we screen the collected applications and start lining up job discussions with the hiring manager. However, we assure you that we will attempt to maintain a reasonable time window for successfully closing this requirement. The candidates will be kept informed and updated on the feedback and application status.

Role Description:

• Design, build, and maintain applications using Node.JS
• Hands-on working on various Azure PAAS services.
• Good problem solving abilities along with strong understanding of Data structures, various design patterns & algorithms.
• Enhance existing services and applications to increase availability, reliability, and scalability in a microservices environment
• Work across the engineering team to build new features and services at scale
• Improve engineering tooling, process, and standards to enable faster, more consistent, more reliable, and highly repeatable application delivery
• Remain engaged with latest technology trends and understand operational challenges to continually evolve application delivery processes and platform components
• Support platform technology decisions based on performance metrics and operational SLAs
• Provide guidance and best practices around security for applications and platform infrastructure

Qualifications:

• 3+ years software development experience using Node.JS
• Must have experience & understanding of working on Azure PAAS services.
• Strong understanding of Azure PAAS services like Services, Service Bus, etc.
• Exposure/understanding of JavaScript frameworks like Angular.JS/React.JS is added advantage.
• Experience with database and cloud technologies
• Understand the benefits of microservices, but also understand the challenges they bring and current trends on how to address those challenges
• Strong written and verbal communication skills
• BS degree in Computer Science or equivalent, Master’s degree preferred.