MERN STACK DEVELOPER

Project Overview

We’re building Express AI, a SaaS platform that allows small and medium-sized businesses (SMBs) to easily train and deploy their own dedicated AI agents for customer service, technical support, sales, and more.

Our vision is to give SMBs the power of enterprise-grade AI without complexity. You’ll help build the core platform that powers this – including agent training interfaces, web deployment, dashboards, and integrations.

Key Responsibilities

• Develop scalable full-stack features using modern JavaScript frameworks

• Build and maintain AI agent training modules (upload docs, FAQs, tone settings)

• Integrate OpenAI, Whisper, LangChain, and other LLM APIs

• Implement user-facing dashboards for chat/voices/social/email agent monitoring

• Design multi-tenant systems with admin-level controls

• Ensure reliability and scalability of the platform as we grow

Tech Stack

• Frontend: React.js, Next.js, TypeScript

• Backend: Node.js, Express, MongoDB (or Postgres), Redis

• AI & NLP: OpenAI API (ChatGPT, Whisper), LangChain, Python (optional)

• DevOps: Docker, AWS or GCP (basic familiarity okay)

• Other: WebSockets for real-time chat, REST APIs, Git

Role Type

• Full Stack Developer (preferred)

• Frontend or Backend specialists also considered, but must be willing to collaborate on both sides

Experience Level

• 3 to 6 years of professional experience

• Previous work with SaaS platforms, AI tools, or multi-tenant architecture is a big plus

Must-Have Skills

• Proficiency in JavaScript/TypeScript

• Strong experience with React.js and Node.js

• Experience working with REST APIs and building secure web apps

• Solid understanding of cloud deployment (AWS/GCP/Firebase)

• Ability to work independently, self-manage, and deliver in a fast-paced environment

Nice-to-Have Skills

• Familiarity with LangChain, OpenAI, AI agent frameworks

• Experience with voice/chat integration

• Prior experience building tools for SMBs or customer support systems

Engagement Type

• Full-time (preferred) or part-time with clear weekly availability

• Remote (India-based candidates only)

Why Join Us?

• Work on a cutting-edge AI platform solving real problems for real businesses

• Fast-moving, no-red-tape team environment

• Build something that will impact millions of small businesses globally

• Past experience in working with any product start-up is a plus.
• Proficiency in fundamental front end languages such as HTML, CSS, and JavaScript.
• Familiarity with JavaScript frameworks such as Angular JS, React, and others.
• Knowledge of Node.js and frameworks available for it such as Express (recommended).
• Good understanding of asynchronous request handling, partial page updates, and AJAX
• Understanding of REST Services.
• Experience with Redis.
• Familiarity with database technology such as MySQL, MongoDB and Elasticsearch.
• Proficient understanding of serverless programming.
• Proficient understanding of code versioning tools, such as Git.
• Good problem-solving skills.
• Attention to detail.

We are seeking a skilled Senior Software Development Engineer (SDE-3) proficient in MERN stack technologies to join our dynamic team.

Responsibilities:

• Design, develop, and maintain scalable web applications and services using MERN stack technologies (MongoDB, Express.js, React.js, Node.js) and Nest.js.
• Implement frontend components and user interfaces using React.js and Next.js.
• Develop and integrate server-side logic using Node.js, Express.js, and Nest.js.
• Utilize MongoDB and SQL databases to manage and optimize data storage solutions.
• Implement real-time communication and event-driven architectures using technologies like Socket.io.
• Deploy applications on AWS cloud infrastructure, leveraging services such as EC2, S3, Lambda, DynamoDB, and others as required.
• Ensure code quality, performance, and adherence to best practices through code reviews and automated tests.
• Collaborate effectively with cross-functional teams including product managers, designers, and other developers.
• Stay updated with emerging technologies and industry trends to continuously improve development practices and tools.

Requirements:

• Bachelor’s degree in Computer Science, Engineering, or a related field (preferred).
• 5+ years of experience in software development with expertise in MERN stack technologies.
• Proficiency in Node.js, Next.js, React.js, Express.js, Nest.js, JavaScript, and TypeScript.
• Strong understanding of MongoDB and SQL databases, including database design and optimization.
• Experience building and deploying applications on AWS cloud infrastructure (EC2, S3, Lambda, DynamoDB).
• Familiarity with real-time web applications and event-driven architectures using technologies like Socket.io.
• Solid understanding of software development principles, design patterns, and best practices.
• Excellent problem-solving skills and ability to troubleshoot complex issues.
• Effective communication and collaboration skills, with the ability to work both independently and as part of a team in a fast-paced environment.

About Company

Our client delivers personalised luxury interior design to India’s discerning homeowners and corporates. Led by highly admired luxury brand builders, internationally trained designers, world-class technology professionals and curated teams of turnkey project execution specialists. We seek perfection in design and are committed to bringing back trust and excitement in the design process.  

Qualifications

• Software developer with skills to develop front-end and back-end systems in Web site development.
• The candidate number has hands-on experience in handling and developing code in JavaScript, React, HTML, PHP, MySQL, APACHE & NGINX to develop web-based applications.
• Knowledge of designing the user interface, developing servers and database designs & coding for mobile platforms would be added advantage.
• Work Experience: 6-7 Years

Requirements

•  Design and implementation of the overall web architecture.
•  “Pixel-perfect” implementation of our approved user interface.
•  Expertise in front-end technologies, including JavaScript,CSS3 and HTML5 and third-party libraries such as React Js, jQuery
•  Design and deployment of our database
•  Ensuring the entire stack is designed and built for speed and scalability
•  Design and construction of our REST API
•  Integrating our front-end UI with the constructed API
•  Design and implementation of continuous integration and deployment
•  Designing Database - Expertise in databases like MySQL, other databases like MongoDB , and PostgreSQL Will be a plus.
•  Ensuring cross-platform optimization for mobile phones.
•  Overseeing and guiding the analysing, writing, building, and deployment of software.

What skills we are looking for?

• Writing HTML, CSS, and JavaScript. Up to the latest practices,
•  A relevant back-end programming language experience
•  Database design and management, including being up on the latest practices and associated versions
• Server management and deployment for the relevant environment
•  Familiarity with a relevant and globally supported framework

both front-end and back-end like React, and Laravel.

• Thorough understanding of user experience and possibly even product strategy
•  Experience implementing testing platforms and unit tests

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Role Objectives 

• Participate in complex design and software development tasks within an appropriate schedule, task, and quality guidelines set in conjunction with the Senior Platform Specialists and Platform Architect  

• Hands-on development and implementation of solutions including the configuration of e.IQ platform components and custom development 

• Tasks associated with testing and documentation of solution implemented 

Academic Qualification
B.E/B.Tech/MCA in computer science Engineering or a related field. 

Experience Profile  

4 -6 years of experience in development or platform implementations.

Required Technical Skillset for Java Development

• core JavaScript, CSS, HTML-5,

• At least one of these frameworks (Angular JS / React /Vue / jQuery / Bootstrap)

• Experience in developing front-end web applications for various devices (responsive) 
  

Good to have:

• Basic Java knowledge /Programming, RDBMS (preferably MySQL or MSSQL), Exposure to Liferay.

• Must be capable of coding and unit testing their own code
  

• Team player with good interpersonal skills

• Should have strong analytical skills                                                  
  

• Good communication skills

• Capable of juggling several priorities and delivering results on time in a high-pressure, dynamic environment.

• Work with development teams and product managers to ideate software solutions
• 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
• Test software to ensure responsiveness and efficiency
• Troubleshoot, debug and upgrade software
• Create security and data protection settings
• Build features and applications with a mobile responsive design
• Write technical documentation
• Work with data scientists and analysts to improve software

• Proven experience as a Full Stack Developer or similar role
• Experience developing desktop and mobile applications
• Familiarity with common stacks
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript)
• Knowledge of multiple back-end languages (e.g. Javascript, PHP, WordPress) and JavaScript frameworks (e.g. Angular, React, Node.js)
• Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache)
• Excellent communication and teamwork skills
• Great attention to detail
• Organizational skills
• An analytical mind
• Degree in Computer Science, Statistics or relevant field