Mean/mern Stack developer

Job Title: Software Development Engineer – III (SDE-III)

Location: Sector 55, Gurugram (Onsite)

Work Timings: Regular day shift, 5 days working

About Master-O

Master-O is a next-generation sales enablement and microskill learning platform designed to empower frontline sales teams through gamification, AI-driven coaching, and just-in-time learning. We work closely with large enterprises to improve sales readiness, productivity, and on-ground performance at scale.

As we continue to build intelligent, scalable, and enterprise-ready products, we are looking for a seasoned SDE-III who can take ownership of complex modules, mentor engineers, and contribute to architectural decisions.

Role Overview

As an SDE-III at Master-O, you will play a critical role in designing, building, and scaling core product features used by large enterprises with high user volumes. You will work closely with Product, Design, and Customer Success teams to deliver robust, high-performance solutions while ensuring best engineering practices.

This is a hands-on role requiring strong technical depth, system thinking, and the ability to work in a fast-paced B2B SaaS environment.

Required Skills & Experience

• 4–5 years of full-time professional experience in software development
• Strong hands-on experience with:
• React.js
• Node.js & Express.js
• JavaScript
• MySQL
• AWS
• Prior experience working in B2B SaaS companies (preferred)
• Experience handling enterprise-level applications with high concurrent users
• Solid understanding of REST APIs, authentication, authorization, and backend architecture
• Strong problem-solving skills and ability to write clean, maintainable, and testable code
• Comfortable working in an onsite, collaborative team environment

Good to Have

• Experience working with or integrating LLMs, AI assistants, or Agentic AI systems
• Experience with cloud platforms and deployment workflows
• Prior experience in EdTech, Sales Enablement, or Enterprise Productivity tools

Why Join Master-O?

• Opportunity to build AI-first, enterprise-grade products from the ground up
• High ownership role with real impact on product direction and architecture
• Work on meaningful problems at the intersection of sales, learning, and AI
• Collaborative culture with fast decision-making and minimal bureaucracy
• Be part of a growing product company shaping the future of sales readiness

We are seeking a skilled MERN Stack Developer to join our dynamic development team. The ideal candidate will be proficient in MongoDB, Express.js, React.js, and Node.js, and will play a key role in building and maintaining web applications.

Key Responsibilities:

• Frontend Development: Develop user-facing features using React.js, ensuring appealing and responsive user interfaces.

• Backend Development: Build efficient and scalable server-side systems using Node.js and Express.js.

• Integration: Integrate front-end components with server-side logic, ensuring seamless communication between the two.

• Data Management: Implement data storage solutions using MongoDB and other relevant technologies.

• Troubleshooting: Identify and address bugs, glitches, and performance issues to maintain application functionality.

• Collaboration: Work closely with cross-functional teams to conceptualize, define, and implement new features.

• Innovation: Keep abreast of emerging technologies and trends to contribute to continuous improvement.

Required Skills and Qualifications:

• React Proficiency: In-depth knowledge of React.js and its core concepts for building dynamic user interfaces.

• Node.js and Express: Strong expertise in Node.js and Express.js to create efficient and scalable backend systems.

• MongoDB: Experience with MongoDB for data storage and management.

• Full-Stack Development: Ability to work on both frontend and backend development.

• Problem-Solving: Strong analytical and problem-solving skills.

• Communication: Excellent communication and teamwork skills.

Preferred Qualifications:

• Experience with RESTful APIs and GraphQL.

• Familiarity with version control systems like Git.

• Understanding of Agile methodologies.

Required Skills & Qualifications

• 5+ years of professional web development experience, with 3+ years focused on Shopify.
• Strong proficiency in Liquid templating language and Shopify’s theme architecture.
• Experience with Shopify APIs (REST & GraphQL) and building private or public apps.
• Strong frontend development skills: HTML5, CSS3 (SCSS), JavaScript (ES6+), and React or Vue.js.
• Deep understanding of Shopify's checkout process, cart mechanics, and store configuration.
• Experience working with Shopify Plus features like checkout.liquid, multi-store setup, and scripts.
• Solid understanding of web performance, accessibility, and SEO best practices.
• Experience with Git, CI/CD pipelines, and Agile development workflows.
• Ability to work independently and lead projects from concept to completion.

Nice to Have

• Experience with Headless Shopify implementations using Hydrogen or Next.js.
• Familiarity with Shopify Functions, custom checkout extensibility, and Shopify’s new App Bridge.
• Prior experience working with international stores, multiple currencies, and languages.
• Understanding of backend systems (Node.js, PHP, or Ruby) for custom app integrations.
• Contributions to the Shopify developer community or open-source projects.

Job Title: Full Stack Developer

Experience- 3+ years

Location: Remote

Notice Period: Immediate Joiner Preferred

Job Description:

Responsibilities:

• Design, develop, and maintain full-stack applications using Python (FastAPI), Node.js, and React.
• Create and optimize RESTful APIs and backend services.
• Work with PostgreSQL to design efficient data models and write complex SQL queries.
• Develop responsive and interactive front-end components using React.
• Collaborate with team members using Git for version control and code reviews.
• Debug, troubleshoot, and enhance existing applications for better performance and user experience.
• 
  

Requirements:

• 3 years of experience in full-stack development or a similar role.
• Strong proficiency in Python with hands-on experience in FastAPI.
• Solid front-end development experience using React.
• Experience developing backend services with Node.js.
• Proficiency in PostgreSQL, including writing efficient SQL queries.
• Familiarity with Git for version control and collaborative development.
• Good communication and problem-solving skills.

• Building interactive consumer data from multiple systems and RESTfully abstracting to the UI through a Node.js backend
• Define code architecture decisions to support a high-performance and scalable product with a minimal footprint
• Address and improve any technical issues
• Collaborate well with engineers, researchers, and data implementation specialists to design and create advanced, elegant and efficient systems

• Architect, develop and maintain core products and services of the company.
• Create database architecture and best practises for optimization in speed and product operating costs.
• Design client-side and server-side architecture
• Build the front-end of applications through appealing visual design
• Develop and manage well-functioning databases and applications
• Write effective APIs with high-volume large scale transaction processing capabilities.
• Collaborate with design teams to ensure flawless UI and UX is achieved 
• Build features and applications with a mobile responsive design
• Write technical documentation
• Test software to ensure responsiveness and efficiency
• Work with customers in evaluating technical requirements.
• Work closely with the product managers to achieve product vision and goals
• Review work of other developers and contractors, provide feedback and mentoring.
• Assist in the hiring of technical talent.

• Proven experience as a Full Stack Developer or similar role for atleast 3 years 
• In depth knowledge of Ruby on Rails, NodeJS, ExpressJS or Restify
• Experience implementing applications using Angular 1 or React
• Experience creating front end applications using HTML5, Angular, LESS/SASS
• Hands on experience with JavaScript Development on both client and server-side
• Automating the building and deploying of code along with continuous integration (Jenkins/Hudson) and version control (SVN, Git)
• Strong experience is deploying and managing application in AWS and Google Cloud
• Creating secure RESTful-based web services in XML and JSON, Javascript, JQuery
• Experience with modern frameworks and design patterns, minimum 2 years experience with MEAN Fullstack paradigm

• Know how to create apis and applications
• Know how to architect and scale databases
• Know how to build front end for applications
• Know how to deploy applications on the cloud