Senior Fullstack Developer (Fintech)

IOT Solutions World; Mumbai; On-site; INR 2,500,000 - 4,000,000; Full time

Job summary

IOT Solutions World in Mumbai, India, seeks a Senior Full-Stack Engineer with 5+ years of experience to design, develop, and maintain scalable production-grade systems.

You will build backend services with Node.js, craft responsive React UIs, work with PostgreSQL or MySQL, and collaborate across teams to drive architecture decisions. The role involves Docker-based deployments, cloud platforms (AWS or GCP), code reviews, mentoring juniors, and writing clear technical docs.

Qualifications

• Minimum 5+ years of professional full-stack development experience.
• Strong backend development experience with JavaScript (Node.js).
• Strong frontend development experience with React.
• Experience working with PostgreSQL or MySQL.
• Experience building and maintaining production-grade systems.
• Strong understanding of Object-Oriented Programming (OOP) or Functional Programming (FP).
• Solid knowledge of clean coding practices and SOLID principles.
• Experience with Docker and containerized environments.
• Experience working with cloud services (AWS or GCP preferred).
• Excellent written and verbal communication skills.

Responsibilities

• Design, develop, and maintain scalable full-stack applications.
• Build robust backend services and APIs using JavaScript (Node.js preferred).
• Develop responsive, high-performance user interfaces using React.
• Work with relational databases such as PostgreSQL or MySQL to design and optimize schemas and queries.
• Contribute to architecture decisions and system design discussions.
• Ensure code quality by following clean coding practices, SOLID principles, and best practices in OOP/FP.
• Deploy, monitor, and maintain production systems.
• Collaborate with DevOps teams to containerize applications using Docker.
• Work with cloud platforms (preferably AWS or GCP) to deploy and scale applications.
• Participate in code reviews and mentor junior developers.
• Integrate third-party services, including AI APIs and related tools.
• Write clear technical documentation and communicate effectively with stakeholders.

Skills

JavaScript

Node.js

React

OOP/FP

SOLID principles

Clean coding

Communication

Code reviews

Tools

PostgreSQL

MySQL

Docker

AWS

GCP

Job description

We are seeking a highly skilled and experienced Senior Full-Stack Engineer with a minimum of 5 years of professional experience in both frontend and backend development. The ideal candidate is passionate about building scalable, high-performance applications and has strong expertise in JavaScript-based backend systems and modern frontend frameworks. You will play a key role in designing, developing, and maintaining production-grade systems while collaborating closely with cross-functional teams.

Key Responsibilities

• Design, develop, and maintain scalable full-stack applications.
• Build robust backend services and APIs using JavaScript (Node.js preferred).
• Develop responsive, high-performance user interfaces using React.
• Work with relational databases such as PostgreSQL or MySQL to design and optimize schemas and queries.
• Contribute to architecture decisions and system design discussions.
• Ensure code quality by following clean coding practices, SOLID principles, and best practices in OOP/FP.
• Deploy, monitor, and maintain production systems.
• Collaborate with DevOps teams to containerize applications using Docker.
• Work with cloud platforms (preferably AWS or GCP) to deploy and scale applications.
• Participate in code reviews and mentor junior developers.
• Integrate third-party services, including AI APIs and related tools.
• Write clear technical documentation and communicate effectively with stakeholders.

Required Qualifications

• Minimum 5+ years of professional full-stack development experience.
• Strong backend development experience with JavaScript (Node.js).
• Strong frontend development experience with React.
• Experience working with relational databases such as PostgreSQL or MySQL.
• Experience building and maintaining production-grade systems.
• Strong understanding of Object-Oriented Programming (OOP) or Functional Programming (FP).
• Solid knowledge of clean coding practices and SOLID principles.
• Experience with Docker and containerized environments.
• Experience working with cloud services (AWS or GCP preferred).
• Excellent written and verbal communication skills.