Fullstack Developer

Job Title: Full-Stack MERN Developer (5–8 Years Experience)

Location: Borivali, Mumbai (Onsite)

Experience: 6–8 Years

Joining: Immediate Joiners

Employment Type: Full-time

Job Overview

We are looking for an experienced Full-Stack MERN Developer to join our engineering team in Borivali, Mumbai. The ideal candidate should have strong hands-on experience building scalable web applications using React, Node.js, Express, and MongoDB, with a solid understanding of REST APIs, microservices architecture, performance optimization, and cloud infrastructure.

You will work on consumer-facing applications, handle large datasets, and contribute to building reliable, high-performance systems.

Key Responsibilities

• Design, develop, and maintain full-stack web applications using MERN stack
• Build scalable and secure RESTful APIs and backend services using Node.js & Express
• Develop reusable and high-performance React components with proper state management
• Implement microservices-based architecture and inter-service communication
• Optimize application performance at both frontend and backend levels
• Work with MongoDB for data modeling, indexing, and performance tuning
• Handle large datasets efficiently and ensure system reliability
• Implement logging, tracing, and monitoring for production-ready applications
• Collaborate with product, frontend, backend, and DevOps teams
• Write clean, maintainable, and well-documented code

Technical Requirements

Backend

• Strong hands-on experience with Node.js & Express.js
• Expertise in building REST APIs and backend business logic
• Strong understanding of async programming (Callbacks, Promises, Async/Await)
• Experience with microservices architecture
• Hands-on experience with MongoDB (Expert level)
• Working knowledge of PostgreSQL / MySQL
• Experience with Kafka or other message queue systems
• Familiarity with Bull / job schedulers

Frontend

• Strong experience with React.js
• Hands-on experience with state management (Redux, Context API, or similar)
• Good understanding of HTML, CSS, AJAX
• Experience with performance optimization techniques in React

Infrastructure & Cloud

• Experience with Docker and Kubernetes (K8s)
• Hands-on exposure to AWS services such as EC2, S3, ELB, AutoScaling, CloudFront
• Understanding of CI/CD pipelines is a plus

Core Computer Science

• Good understanding of Data Structures & Algorithms
• Solid knowledge of Operating Systems fundamentals

Good to Have

• Experience with Redis for caching
• Exposure to Vue.js
• Experience working on consumer-facing web or app products
• Strong debugging and problem-solving skills
• Familiarity with application monitoring tools (logs, metrics, tracing)

What We’re Looking For

• Strong problem-solving mindset and ownership attitude
• Ability to learn new tools and technologies quickly
• Comfortable working in fast-paced, production-driven environments
• Immediate or short-notice joiners preferred

Title

Full Stack MERN/ MEAN Tech Lead

Location

Bangalore

About the company

With over a decade of experience, we specialize in crafting bespoke integration solutions and empowering businesses across the globe with a combined approach to emerging technology. We use cutting edge enterprise platforms - Microsoft, Salesforce, SAP and more Since our establishment in 2004, with our headquarters located in Tampa, USA, eCosmos has been extending global reach and domestic support to a diverse range of organizations, from start-ups to Fortune 500 companies

. Job Summary:

The Lead Developer provides technical expertise which requires a working knowledge of the technical infrastructure underpinning the applications. Plans, consults, and coordinates complex project assignments in the design, development and implementation of applications software. Works as part of a service or project team to implement complex technical solutions that meet business requirements. Responsible for contributing to the planning of the work programs and the review, development, and modification of best practices and technical solutions. Provides supervision to a team of Developers

. What success looks like in this role:

• You will lead a team of 5-10 developers building web apps with React, Node.js, Express and MongoDB, and mobile apps with React Native.

• Architect scalable and high-performance web and mobile apps using proven JavaScript stacks like MERN and MEAN

• Establish best practices for web and mobile development, code quality, testing, and CI/CD

• Proficiency in TypeScript is required to develop and maintain the front-end and back-end of our web applications.

• Plan sprints, assign tasks, and oversee code reviews, testing, and releases

• Troubleshoot and debug applications across the stack

• Manage technical debt and spearhead migrations to new libraries/frameworks when needed

• Hire and mentor developers and promote an engineering culture of learning and excellence.

Skills Required:

• Excellent communication skills, both written and oral.

• Quick problem-solving skills with exceptional aptitude and reasoning. • Good orator, presenter with influencing skills to manage and negotiate complex conflicting resolutions.

• Ability to frame ideas in words to provide a perspective and outcome from analyzing them.

• Experience in leading, managing, mentoring a team of junior developers.

You will be successful in this role if you have:

: • Bachelor's in engineering (B.E or BTech.), MCA.

• 5+ years' experience leading web and/or mobile engineering teams

• Deep expertise with JavaScript, Node.js, React, React Native, and MongoDB • Experience building web apps with MERN or similar stacks • Experience building mobile apps with React Native or similar frameworks

• Excellent verbal and written communication skills

• Comfortable with Agile methodologies like Scrum and Kanban

• Strong leadership skills and commitment to building a world-class engineering team

Compensation & Benefits:

For the right candidate, e-Cosmos is ready to provide an extremely competitive salary and added incentive bonus potential

. e-Cosmos provides an attractive and complete benefits package:

✓ Accidental Death & Dismemberment Insurance

✓ Training and certification assistance

✓ Employee referral bonus program

✓ Vertical and Lateral increments

ETHICS COMPLIANCE:

: e-Cosmos is firmly committed to conducting business in compliance with the letter and spirit of the law and other accepted standards of business conduct as reflected in the company's policies.

We are seeking a skilled and motivated Python Full Stack Developer to join us. The ideal candidate will have experience with Python, JavaScript and its related technologies, as well as a passion for developing efficient and scalable software solutions.

Responsibilities:

• Design and develop high-quality, scalable applications using Python, Django, DRF, FastAPI and JavaScript frameworks such as React or Vue.js
• Analyze business requirements and develop software solutions to meet those needs
• Write clean, maintainable, and efficient code
• Test software solutions to ensure they meet performance, scalability, and reliability requirements
• Debug and troubleshoot issues in the software
• Stay up-to-date with emerging trends and technologies in Python development

Qualifications:

• Bachelor's or Master's degree in Computer Science or related field
• At least 2 years of experience in developing applications using Python, Django, DRF or FastAPI.
• At least 2 years of experience in using front-end JavaScript frameworks such as Jquery, React or Vue.js
• Experience with database technologies such as PostgreSQL and MongoDB
• Experience with AWS or other cloud platforms
• Ability to write clean and maintainable code
• Strong analytical and problem-solving skills
• Excellent written and verbal communication skills

Nice to have:

• Knowledge of Trading in stocks, forex, futures etc.
• Knowledge of automated trading
• Experience with Different Trading Platforms

We offer:

• Competitive salary
• Flexible working hours

Job Types: Full-time, Regular / Permanent

Salary: ₹400,000.00 - ₹10,000.00 per year

Benefits:

• Flexible schedule

Schedule:

• Day shift
• Monday to Friday

Supplemental pay types:

• Overtime pay
• Yearly bonus
• Performance-based bonus

Ability to commute/relocate:

• Mondeal heights, SG Highway, Ahmedabad - 380015, Gujarat: Reliably commute or planning to relocate before starting work (Required)

Education:

• Bachelor's (Preferred)

Experience:

• Python: 1-3 years (Required)
• JavaScript: 1-3 years (Required)

Location      : Baner, Pune

Notice period : Immediate to 30 Days

• Proven software development experience
• Proven working experience in Android
• Strong Java OOPs concepts and design patterns understanding
• Hands-on experience on Kotlin
• Good understanding of C and data structures, JavaScript
• Must have a good understanding of React Native or Cordova
• Strong knowledge of Android SDK, different versions of Android, and how to deal with different screen sizes
• Have published at least one app in the Store
• Experience in writing SDK frameworks
• Experience working with remote data via REST and JSON
• Strong knowledge of Android UI design principles, patterns, and best practices
• Experience with third-party libraries and APIs
• Knowledge of JNI, security algorithms
• Experience with offline storage, threading, and performance tuning
• Ability to design applications around natural user interfaces
• Knowledge of the open-source Android/iOS ecosystem and the libraries available for common tasks
• Must be proficient in code versioning tools such as Git, SVN
• Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies Solid understanding of the mobile development life cycle
• Good to have: Experience in working on cross-platform such as Flutter, Kony

Job Description: -

Comm-IT is seeking an enthusiastic Web Developer to help our fast-growing development team in India. You will play an important role and be a part of creating a product used by millions of people.

Responsibilities: -

• Design and build advanced web applications / products for desktop browsers, mobile web & feature phone.
• You work in agile cross-functional team to create great customer experiences and implement high quality code into production.
• Work on bug fixing and improving application performance.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
• You prioritize performance in all your development - both network and rendering

Requirements: -

• Minimum of 6 months - 1 year of experience in software development.
• This project requires full stack experience creating applications and products using .Net and C# development, HTML 5, jQuery library and CSS3.
• Strong Web backend knowledge in Asp.Net Web API, Razer pages, .Net Entity Framework and MS SQL scripting.
• Experience developing REST-based APIs.
• Knowledge in TypeScript / JavaScript front-end back-end development experience
• Knowledge in CSS & layout skills – modern Bootstrap, CSS layout techniques
• Good understanding of object-oriented programming and its implementation
• Interest working in Cloud-based technologies.
• Confidence to work as part of a Scrum Team.
• Desire to learn new

Nice to have (Add-On): -

• Knowledge of multiple back-end languages (e.g., C#, Java, Python) and JavaScript frameworks (e.g., Angular, React, Node.js, Blazor Framework)
• Familiarity with databases (e.g., MySQL, MongoDB), web servers (e.g., Apache) and UI/UX design
• Experience creating automated unit tests and functional test.