L4 Fullstack Engineer

Job Title: MERN Stack Developer (Node.js & React.js Expert)

Experience: 5 – 7 Years

Location: Bangalore

Work Mode : Hybrid

Employment Type: Full Time

Job Summary:

We are seeking a highly skilled MERN Stack Developer with a strong background in Node.js and React.js to join our dynamic team. The ideal candidate should have 5–7 years of hands-on experience building scalable, secure, and high-performance web applications. You will play a critical role in the architecture, design, development, and deployment of end-to-end solutions using the MERN stack.

Key Responsibilities:

• Design, develop, and maintain full-stack applications using MongoDB, Express.js, React.js, and Node.js
• Build RESTful APIs and ensure integration with front-end components
• Optimize components for maximum performance across a vast array of web-capable devices and browsers
• Write clean, modular, and reusable code with proper documentation and testing
• Troubleshoot and debug issues across the stack
• Collaborate with UI/UX designers, product managers, and other developers to deliver high-quality products
• Participate in code reviews, architectural discussions, and continuous improvement of development processes
• Ensure secure coding practices and compliance with best standards
• Manage deployments and maintain CI/CD pipelines

Required Skills and Qualifications:

• 5–7 years of professional experience in full-stack web development with a focus on Node.js and React.js
• Deep understanding of JavaScript, ES6+, and asynchronous programming
• Strong experience in building scalable backend services using Node.js and Express
• Proficient in building rich UI components using React.js, Redux/Context API, and modern front-end tooling (Webpack, Babel, etc.)
• Experience with MongoDB and Mongoose, and understanding of NoSQL database design
• Hands-on experience with API design, JWT/Auth, and third-party integrations
• Familiarity with Git, Docker, and modern DevOps practices
• Knowledge of performance optimization and security best practices
• Experience with testing frameworks (Jest, Mocha, Cypress, etc.)

Nice to Have:

• Exposure to TypeScript
• Experience with GraphQL
• Familiarity with cloud platforms like AWS, Azure, or GCP
• Knowledge of CI/CD tools like Jenkins, GitHub Actions, etc.

Note : Immediate & Serving Notice period candidates are prefered

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

Key Responsibilities:

- Design, develop, and maintain scalable applications using Python and TypeScript.

- Work with cutting-edge tech, building solutions using Large Language Models.

- Architect and optimise cloud infra for efficiency, security, and scalability (AWS, Azure, or GCP).

- Integrate and deploy APIs, databases, and front-end interfaces seamlessly.

- Lead code reviews to uphold coding standards and mentor junior developers.

Required Skills and Qualifications:

- 8+ years in software development with expertise in Python and TypeScript.

- Exposure to building or integrating solutions using LLMs.

- Proven ability to lead teams or projects, ensuring high quality outcomes.

- Proficiency in managing cloud environments (AWS, Azure, or GCP).

- Hands-on experience with CI/CD pipelines, containerisation and Infrastructure-as-Code.

- Strong skills in SQL/NoSQL databases and performance tuning.

- Exceptional analytical and debugging skills.

Nice to Have:

- Experience with vector databases (e.g. Weaviate or Milvus) for semantic search or embedding storage.

- Familiarity with Gen AI frameworks and tools (e.g., LangChain, LlamaIndex).

- Familiarity with frontend frameworks (Next.js or Angular).

- Active contributions to open-source projects or a strong GitHub portfolio.

What We Offer:

- Opportunity to work with the latest in Generative AI.

- Competitive salary and comprehensive benefits.

- A forward-thinking, collaborative environment.

- Flexibility in work policies to foster a healthy work-life balance.

FullStack Developer

We are currently building the Technology platform for the Global Air Cargo industry ($300B market). 

Currently, we have two open roles (1 Front End Engineer & 1 Back End Engineer).

Full Stack Engineers are also desired for the open positions. 

These (2) engineers will be part of the Tech team which will be at the core of what we aspire to build.

Looking for Full Stack / Front End / Back End Developer

- Tech Stack (React, node.js, typescript, postgreSQL, AWS)

- loves to code, get hands-on and likes to build products from scratch

- At least 2+ years of experience building software products

- "Build local, Launch global" mindset

- Good with people and teams +

- prior startup experience +

- SaaS platform expertise +

- Work location - Chennai

- So we are looking only for candidates in Chennai or who are open to relocating to Chennai for this opportunity

- Open to explore both Contract & Full time options for the (2) roles

• Work with development teams and product managers to create software solutions.
• Design client-side and server-side architecture.
• Build the front-end of applications.
• 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 the software.

Qualifications:

Degree in Computer Science, Software Engineering or relevant field.
Experience with Java, Spring, and Restful API's.
Experience with Database development (MySQL, Postgres, etc).

Proven experience as a Full Stack Developer or similar role. Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, jQuery).
Knowledge of multiple back-end languages (e.g. Java, Python) and JavaScript frameworks (e.g. Angular, React, Node.js).
Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache), and UI/UX design.
Experience with AWS or other cloud environments

• End-to-end full-stack development experience
• Full hands-on experience with at least one of the following languages Java, PHP, Python, .NET and code repositories like GIT, SVN
• Expertise with HTML5, JQuery, CSS
• Proficiency with front-end JavaScript frameworks like Angular, React, etc.
• Experience of designing and developing APIs in a micro-service architecture
• Experience with webserver technologies like Node.js, J2EE, Apache etc.
• Good understanding and working experience with either relational or non-relational databases like Oracle, MySQL, PostgreSQL, Mongo DB, Cassandra
• Good understanding of the changing trends of user interface guidelines for mobile apps and be able to transform apps to newer form factors
• Hands-on with Native UI Components
• Familiar with Cloud components & deployment procedures.
• Familiar with code repository

What you need to have:

Job Title: Full Stack Developer

Experience: 6-8 years    

Location: Pune 

Mandatory Skills Sets                                                                   

• Expert level design & coding skills .NET framework. Must have wide range of exposure to all .NET framework components like ASP.Net with C#, MVC Ado.Net, WPF, WCF etc. Unit Test Framework
• Good exposure to UI technologies like HTML, CSS, Java Script, JQuery, JQuery, Bootstrap, Angular
• Work on relational database systems, Object Oriented Programming and web application development                                                                
• Non-relational database – Mongo DB/Postgres
• Agile development methodologies and techniques & tools
• Experience in web services, Microservices
• Experience in developing complex/custom application
• Should be able to mentor Software Engineers to support design, code and meet software quality code standards as well as independently design and deliver projects
• Technical Hands on, Passionate, creative and team player
• Solving critical business problems and strong delivery focused
• Excellent Communication and problem-solving skills

Preferred Skills Sets

• Experience in cloud native application development using Azure or AWS will be an advantage
• Direct customer communication with European/US customers.
• Customer site work experience