Full Stack Developer

Job Description – Senior Software Developer

 Key Responsibilities:

• Architect, develop and maintain web applications using the MERN stack.
• Design RESTful APIs (and possibly GraphQL) in Node.js/Express, integrate with front-end in React.
• Build and enhance the front-end UI in React, ensuring performance, responsiveness and maintainability.
• Design MongoDB schemas, indexes and queries for high-traffic/scale scenarios.
• Deploy, operate and optimise cloud infrastructure on AWS: e.g., EC2, Lambda, S3, RDS/DynamoDB, VPCs, IAM, autoscaling.
• Ensure high availability, fault-tolerance, and scalability of services in production.
• Set up and maintain CI/CD pipelines, infrastructure as code, automated testing, monitoring & alerting.
• Troubleshoot and fix performance bottlenecks across the stack (front-end, back-end, database, cloud).
• Collaborate with cross-functional teams (product, design, QA, DevOps) to deliver features end-to-end.
• Mentor junior/mid-level developers, conduct code-reviews, impart best practices.
• Stay up to date with emerging technologies, propose improvements to architecture and processes.

Required Skills & Qualifications:

• 3-5 years of hands-on experience in full-stack web development using the MERN stack (MongoDB, Express.js, React.js, Node.js).
• Strong front-end skills in React: component architecture, hooks, state management, performance optimisation.
• Solid back-end skills in Node.js/Express: API design, middleware, security, robustness.
• Experience with MongoDB (or equivalent NoSQL) including schema design, query optimisation, indexing.
• Proven experience working with AWS cloud services (compute, storage, database, networking, security, monitoring).
• Experience deploying applications at scale: autoscaling, high availability, disaster recovery.
• Familiarity with CI/CD pipelines, infrastructure‐as‐code (CloudFormation, Terraform or similar), containerisation (Docker) is a plus.
• Good understanding of software engineering best practices: code-quality, testing, documentation, version control (Git).
• Excellent communication skills, self-motivation, ability to work remotely and collaborate across time zones.
• Bachelor’s degree in Computer Science or related field (or equivalent experience).
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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

The Role

This role is anything but conventional- It is an opportunity to define and execute our plans and make an impact on the development of millions of children.

As our tech lead, you will work closely with the founders to crystallize and own the product roadmap and then, to bring the product vision to life through simple, elegant design & code that delights users.

You will be the key architect of the product and will help the engineering team build and maintain the product across mobile and web. 

You will own development and delivery of the code- including analysis, optimization and debugging.

Key Skills

3-6 years of experience with backend and frontend web-based application development

2+ years of experience with React / Redux + HTML/CSS

2+ years of experience with Python

Have some experience with databases (SQL, MongoDB)

Have created meaningful APIs and models that are flexible and scalable

About You

You will thrive in this role at KinderPass if you:

• Have a passion for our mission to re-imagine child health and development
• Have the drive to be part of building something new - to learn, to work hard, to be your best self and to adapt to the constant change and evolution of a start-up.
• Enjoy autonomy and flexibility but can work well in a team
• Count Ownership and Reliability as your key strengths
• Can communicate effectively