MERN Stack Developer (Backend Focus)

Infynno Solutions Llp; Ahmedabad District; On-site; INR 1,200,000 - 2,500,000; Full time

Job summary

Infynno Solutions Llp is seeking a backend-focused MERN developer with strong Node.js and TypeScript experience to build scalable services and APIs. The role includes integrating AI services and working closely with frontend teams on React.js/Next.js interfaces.

Candidates should have 3+ years in Node.js/TypeScript, MySQL expertise, and exposure to AWS. Prior work with US-based clients and familiarity with SaaS architectures is preferred.

Qualifications

• Bachelor's degree in CS or related field.
• 3+ years of Node.js/TypeScript backend experience.
• MySQL experience required; MongoDB advantageous.
• At least 1 year of React.js/Next.js frontend development.
• Experience developing REST or GraphQL APIs.
• Experience with AWS services (EC2, ECS, SQS, SES, Lambda).
• Exposure to Docker/Kubernetes or container-based development is a plus.

Responsibilities

• Full-stack development using MERN technologies with emphasis on backend services.
• Design and develop scalable backend systems using Node.js, TypeScript, and MySQL; MongoDB advantageous.
• Build responsive UIs with React.js/Next.js from UX designs.
• Develop REST or GraphQL APIs and ensure good performance.
• Collaborate with System Architect, Product Manager, and engineering team on design and estimates.
• Write unit tests; support integration and functional testing.
• Integrate AI and LLM APIs, validate outputs, and implement error handling.
• Maintain technical documentation and coordinate with frontend, QA, and DevOps.

Skills

Node.js

TypeScript

React.js

Next.js

REST APIs

GraphQL

AI APIs

Algorithms & data structures

System design

Database concepts

Education

Bachelor's degree in Computer Science

Tools

Docker

Kubernetes

AWS

MySQL

MongoDB

Job description

Job Summary

Exp - (3-6) JD - About the Role: We are looking for a backend-focused MERN Stack Developer with strong experience in Node.js, TypeScript, databases, and API development, along with practical React.js/Next.js skills. The role also includes integrating AI services into application workflows and building reliable, scalable software.

Responsibilities

• Perform full-stack development using MERN technologies, with a strong focus on backend services.
• Design and develop scalable backend systems using Node.js, TypeScript, and MySQL. MongoDB knowledge is an advantage.
• Build responsive user interfaces from UX designs using React.js/Next.js.
• Develop efficient business logic and REST or GraphQL APIs.
• Collaborate with the System Architect, Product Manager, and engineering team on system design, proof of concepts, and effort estimates.
• Write unit tests and support integration and functional testing to maintain code quality and application performance.
• Integrate AI and LLM APIs where relevant, validate structured outputs, and implement appropriate error handling and fallback logic.
• Maintain clear technical documentation and collaborate with frontend, QA, and DevOps teams.

Requirements

• Bachelor's degree in Computer Science or a related field. A postgraduate degree is preferred but not mandatory.
• Strong knowledge of algorithms, data structures, system design, and database concepts.
• Minimum 3 years of hands-on experience in Node.js / TypeScript backend development.
• Hands-on experience with MySQL is required; MongoDB is an advantage.
• At least 1 year of experience with React.js/Next.js frontend development.
• Experience developing REST or GraphQL APIs.
• Experience with AWS services such as EC2, ECS, SQS, SES, and Lambda.
• Basic knowledge of Docker, Kubernetes, or container-based application development is a plus.
• Experience working with US-based clients is required.
• Exposure to multiple business models, project architectures, and SaaS product development is an advantage.
• Practical experience integrating LLM or AI APIs is preferred. Amazon Bedrock experience is an advantage.
• Understanding of prompt engineering, structured AI outputs, and validation of AI-generated data is desirable.

Preferred Skills

• Knowledge of OCR or document processing tools such as AWS Textract.
• Familiarity with RAG, embeddings, vector databases, or pgvector.
• Experience with Next.js, Tailwind CSS, and frontend component libraries such as shadcn/ui or Material UI (MUI) is an advantage.
• Familiarity with automated testing, CI/CD pipelines, and code-quality tools is an advantage.

Preferred Candidate

A strong backend-focused MERN developer who is confident in database-driven system design, optimized backend architecture, and can independently deliver scalable solutions with minimal supervision. The candidate should also be comfortable integrating AI capabilities where they provide practical value.

Education

Bachelor's degree in Computer Science or a related field; postgraduate degree preferred but not mandatory.