Full Stack Developer Internship

HSR Hi-Tech Solutions

KolkataFresher1h agovia Unstop

This job at a glance

Who can apply
Freshers and up to 1 year
Must know
JavaScriptMongoDBReactNext.jsNode.jsExpress
Nice to have
TypeScriptREST APIsGitAWS
Work
On-site in Kolkata · internship
Pay
₹7,500–12,000/month
Skill demand
JavaScript75%React60%MongoDB32%Next.js23%of 111 similar fresher jobs posted in India this week
Listed
31 Oct 2026 · still open

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Key Responsibilities

  • Design, develop, test, and maintain modern, responsive, scalable web applications using the MERN stack (MongoDB, Express.js, React.js, Node.js) and Next.js.
  • Build intuitive, responsive, and performance-oriented user interfaces using React.js, Next.js, JavaScript, TypeScript, HTML5, CSS3, and modern UI frameworks.
  • Develop robust backend services, RESTful APIs, server-side logic, authentication systems, and database integrations.
  • Work on real-world SaaS platforms, ERP systems, business automation tools, dashboards, and customer-facing web applications.
  • Contribute to application architecture, reusable components, database schema design, API structures, and scalable development practices.
  • Identify bugs, troubleshoot application issues, optimize performance, and implement effective technical solutions.
  • Take ownership of assigned features, from understanding requirements and planning implementation to development, testing, and deployment.
  • Build reusable, modular, and maintainable frontend components.
  • Develop responsive user interfaces compatible with desktops, tablets, and mobile devices.
  • Create, integrate, and maintain RESTful APIs and backend services.
  • Implement user authentication, authorization, role-based access control (RBAC), and secure session management.
  • Design and manage MongoDB databases, collections, schemas, indexing, and data relationships.
  • Integrate third-party APIs, payment gateways, cloud services, and external platforms.
  • Work with React hooks, Context API, state management solutions, and modern frontend development practices.
  • Implement Server-Side Rendering (SSR), Static Site Generation (SSG), and other Next.js capabilities.
  • Write clean, reusable, well-documented, and optimized code following industry standards.
  • Debug applications, resolve technical issues, and conduct functional testing.
  • Work with Git and GitHub for version control, branching, pull requests, and collaborative development.
  • Assist in deploying applications and managing development, staging, and production environments.
  • Collaborate with UI/UX designers, project managers, and other developers to convert requirements into functional products.
  • Participate in technical discussions, code reviews, sprint planning, and product improvement activities.
  • Maintain development documentation and provide regular updates on assigned tasks.
  • Research and implement new technologies that improve product quality and development efficiency.

Requirements & Tech Stack

  • Strong understanding of JavaScript (ES6+) and modern web development fundamentals.
  • Working knowledge of the MERN stack:
  • MongoDB – Database management and queries.
  • Express.js – Backend development and API creation.
  • React.js – Component-based frontend development.
  • Node.js – Server-side development.
  • Practical knowledge of Next.js and its application architecture.
  • Good understanding of HTML5, CSS3, responsive design, and modern frontend development.
  • Experience with REST APIs, JSON, HTTP methods, and API integration.
  • Understanding of database design, CRUD operations, and data validation.
  • Familiarity with Git, GitHub, and collaborative development workflows.
  • Understanding of authentication, authorization, and application security fundamentals.
  • Ability to debug code, troubleshoot errors, and independently solve technical problems.

Preferred Technical Skills (Bonus)

  • Cloud Platforms: AWS, Google Cloud Platform (GCP), Firebase.
  • Backend & Frameworks: Laravel, PHP, Python.
  • Frontend Technologies: TypeScript, Tailwind CSS, Ant Design, Redux Toolkit.
  • Database Technologies: Firebase Firestore, MySQL, PostgreSQL, Redis.
  • DevOps & Deployment: Docker, CI/CD, Nginx, Linux, Vercel, Railway, AWS deployment.
  • Cloud & Server Management: Cloud hosting, storage buckets, server configuration, domain management, and environment configuration.
  • Additional Integrations: Razorpay, payment gateways, email services, notification systems, and third-party APIs.

What We Expect From You

  • A strong passion for software development and building real-world products.
  • Ability to learn new technologies quickly and adapt to changing project requirements.
  • A problem-solving mindset with attention to detail.
  • Ability to work independently and take ownership of assigned tasks.
  • Willingness to explore, experiment, and implement new technical solutions.
  • Strong communication skills and the ability to collaborate with a development team.
  • A commitment to writing quality code.
  • Comfortable working in a fast-paced startup environment where responsibilities may evolve.
  • Willingness to work on live projects with actual business requirements and deadlines.

Preferred Candidate Profile

  • Candidates who have developed at least one complete full-stack web application.
  • Candidates with personal projects, GitHub repositories, deployed applications, or previous internship experience.
  • Candidates who understand the complete development lifecycle, from frontend implementation to backend deployment.
  • Candidates who can explain their code, technical decisions, and project architecture.

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