Fullstack Development Intern at Lemon Yellow · Thane, Maharashtra · 0 - 0.6 years · ₹12000 - ₹15000 / mo · Bootstrapped · Posted 6 Jan 2026

When life gives you lemons, we turn them into seamless digital experiences.
Lemon Yellow LLP is looking for a Full Stack Developer Intern, someone who’s passionate about building, learning, and experimenting with code. You’ll collaborate with our developers and designers to turn ideas into real, functional web applications using the MERN stack. If you're eager to dive into the full development lifecycle and ship things that matter, this internship is for you.
Core Responsibilities
- Assist in building end-to-end web applications using MERN (MongoDB, Express.js, React.js, and Node.js)
- Transform UI/UX designs into responsive, accessible front-end components
- Write and test basic REST API endpoints
- Support feature development and contribute to bug fixes
- Document code and follow standard Git workflows
- Observe and learn from code reviews, deployment flows, and team development practices
API & Integration Exposure
- Gain exposure to API integrations and backend data handling
- Assist in connecting third-party tools and services
- Understand user authentication basics like JWT or OAuth
Code Quality & Testing
- Write simple unit tests to validate functionality
- Learn to debug and support in identifying issues and improving performance
Agile Collaboration
- Participate in daily stand-ups, sprint planning, and retrospectives
- Contribute to a collaborative development process through feedback and iteration
- Understand real-world agile workflows and team dynamics
Learning & Growth
- Stay curious and up to date with current trends in web development
- Attend team learning sessions and tech discussions
- Learn under the mentorship of experienced developers
What We Need From You
- Graduate in Computer Science, Software Engineering or a related field
- Basic understanding of JavaScript (ES6+), HTML5, and CSS3
- Exposure to at least one of the MERN technologies through coursework, side projects, or self-study
- Basic knowledge of Git and version control workflows
- Eagerness to learn, take feedback, and build real features
- A portfolio, GitHub profile, or personal projects is a plus
What are we offering?
Experience
- A chance for you to work in a thriving and growing environment. We foster a culture where growth is harmonious and creativity is always appreciated - you grow and you encourage others to do the same.
Exposure
- If you believe in your work, we believe in you. If you think your designs have the power to change the world, we'll help you bring your vision to life and give you the platform to prove it.
Empathy
- We have a carefully curated culture that promotes 2 things: fun & fulfilment. Your welfare - personal, professional, mental, and physical - becomes our responsibility. From Fitness Thursdays to learning sessions, we try to make you laugh & learn.
Who are we?
Lemon Yellow LLP is a user-centered UI/UX design agency, based out of Thane, Maharashtra. With international operations, an experienced mentorship, and a passionate team, we aim to design digital happiness.
You should apply if you believe in making a difference with your designs.
How do you reach us?
Well, after you send in your application, it takes us 2-3 weeks to review it. Sometimes, not often, we might delay just a bit beyond that. This happens when our mailbox is flooded with applications.
We promise we won’t ghost you, you’ll definitely hear from us. In the meantime, feel free to explore our official website.

About Lemon Yellow
About
We're a global digital design agency from India, focusing on product strategy, user experience design, user interface and creative thinking. We are passionate about designing new products, delighting users and help companies improve their business. - Lemon Yellow .
Connect with the team
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📍 Location : UB City, Bengaluru (Hybrid – 3 days in office)
🕒 Experience : 11 to 18 Years
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Role Overview :
- We are looking for a Senior Software Architect to design, build, and scale high-performance SaaS B2B applications.
- The ideal candidate will have deep expertise in MERN stack (MongoDB, Express.js, React.js, Node.js), AWS, and microservices-based architectures.
- This role requires at least 3 Years of experience in an Architect position, with a strong background in building scalable products and handling daily releases.
Key Responsibilities :
- Architect and develop scalable SaaS B2B products using React, Node.js, GraphQL, Elasticsearch, and Micro Frontend Architecture (MFE).
- Design and implement microservices-based distributed systems and RESTful APIs.
- Optimize frontend interfaces using React, Redux, Next.js, HTML, and CSS.
- Develop robust backend APIs using Node.js, Express.js, and MongoDB/PostgreSQL.
- Utilize AWS services (EC2, S3, SQS, SNS, DocumentDB, OpenSearch) and containerization (Docker, Kubernetes).
- Implement scalable database schemas and ensure optimal performance.
- Work with GraphQL for efficient data querying and manipulation.
- Ensure security, reliability, and high availability of the platform.
- Lead and mentor development teams, conduct code reviews, and enforce best practices.
- Collaborate with cross-functional teams to deliver business-driven software solutions.
Required Skills & Experience :
✅ 3+ Years as a Software Architect and currently in an Architect role.
✅ 5+ Years of experience in full-stack development with the MERN Stack.
✅ Strong knowledge of scalable architectures, microservices, and cloud-native SaaS products.
✅ Experience in AWS deployment, cloud infrastructure, and DevOps.
✅ Hands-on experience with Micro Frontends (MFE).
✅ Experience in handling everyday releases and working in Agile environments.
✅ Strong problem-solving skills, logical thinking, and architectural decision-making.
✅ Bachelor’s or Master’s degree in Computer Science or related field.
Preferred :
- Experience in B2B SaaS product development.
- Background in product-based companies.
- No prior experience in Walmart or similar large enterprises.
- Candidates should be based in Bengaluru (Outstation candidates will not be processed).
Hiring for Java Developer Freshers to Experienced with probation training come full time employment.
- Building reusable code and libraries for future use
- Building efficient, testable, and reusable Node JS modules
- Helping in co-creating product vision and roadmap along with Product Managers
- Planning,hiring, developing our own products to the extent required, while reviewing, managing team and morale; and most importantly,setting up required processes that takes us to the next level
- Building high performance frontend applications with react
- Managing End-to-end ownership of modules including designing, development, validation, deployment
- Creating microservices from scratch and ensuring that micro services are used wherever it makes sense.
- Understanding the fully synchronous behaviour of Nodejs
What you need to have:
- A Bachelor's degree in Computer Science, or related technical discipline
- 2+ years of Software Development experience
- Deep hands-on technical experience in object-oriented design, data structures, algorithm design, and complexity analysis
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- Ability to identify, empathize with and delight the customer
- While every product-line has its tech stack - different products have different technologies and it is expected that you are comfortable working across all of them as and when needed.
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- Familiarity with Workers/ child processes and performance tuning
- Experience with SQL/NoSQL databases and their declarative query languages (MySQL, and MongoDB)
- Strong knowledge of the common Node Js & React or web server exploits and their solutions
What is the role?
You will be responsible for architecting and developing features on the application end to end. You will work closely with the Product Managers and the Technical architect to develop high-quality, resilient, and highly performant applications.
Key Responsibilities
- Design and develop SaaS-based applications based on microservices architecture.
- Work on the core backend and ensure it meets the performance benchmarks.
- Work on the front end with ReactJS.
- Designing and developing APIs for the front end to consume.
- Constantly improve the architecture of the application by clearing the technical backlog.
- Meeting both technical and consumer needs.
- Staying abreast of developments in web applications and programming languages.
What are we looking for?
An enthusiastic individual with the following skills. Please do not hesitate to apply if you do not match all of them. We are open to promising candidates who are passionate about their work and are team players.
- Education - BE/MCA or equivalent.
- Overall 4+ years of experience.
- Agnostic/Polyglot with multiple tech stacks.
- Worked on open source technologies – NodeJS, ReactJS, MySQL, NoSQL, MongoDB, DynamoDB.
- Good experience with Front-end technologies like JavaScript frameworks, ReactJS, and AngularJS.
- Backend exposure – good knowledge of building API.
- Worked on serverless technologies.
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- Knowledge of cloud architecture.
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Who will you work with?
You will closely work with the engineering team and support the Product Team of Plum.
What can you look for?
A wholesome opportunity in a fast-paced environment that will enable you to juggle between concepts, yet maintain the quality of content, interact, and share your ideas and have loads of learning while at work. Work with a team of highly talented young professionals and enjoy the benefits of being at this company
We are
It is a rapidly growing fintech SaaS firm that propels business growth while focusing on human motivation. Backed by Giift and Apis Partners Growth Fund II, Company offers a suite of three products - Plum, Empuls, and Compass. works with more than 2000 clients across 10+ countries and over 2.5 million users. Headquartered in Bengaluru, It is a 300+ strong team with four global offices in San Francisco, Dublin, Singapore, New Delhi.
Way forward
We look forward to connecting with you. As you may take time to review this opportunity, we will wait for a reasonable time of around 3-5 days before we screen the collected applications and start lining up job discussions with the hiring manager. We however assure you that we will attempt to maintain a reasonable time window for successfully closing this requirement. The candidates will be kept informed and updated on the feedback and application status.
Requirements:
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8+ years of experience in IT industry as Technical Architect
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Experience in architecting large scale, cloud native applications
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Experience in architecting marketplace (ecommerce or fintech) or similar web applications
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Familiarity with NFT and Blockchain technologies
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Experience in MERN stack based product development
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Experience in AWS cloud based development and CI/CD environment
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Certification in AWS Solution Architect or Professional is preferred
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Experience in handling customer queries and demonstrating product capabilities
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Experience in Agile / SCRUM development process
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Excellent communication and teamwork skills
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Design and maintain scalable, reliable, secure and cost-optimized Architecture of our SaaS product in AWS
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Develop product roadmap and prioritize user stories
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Provide technical leadership to the development team
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Review design and code according to standards and ensure quality
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Design product API
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Co-ordinate customer interactions and team interactions
Job Description
- ONLY FOR PUNE/MUMBAI/BANGALORE/HYDERABAD BASED CANDIDATES .
- EXPERIENCE- Minimum 3 Years & above (3 years Mandatory)
- ONLY IMMEDIATE JOINERS NEED APPLY. FRESHERS PLEASE EXCUSE
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Ability to translate Wireframes and PSD Designs into functional web apps using HTML5, Express, React , Node.js, and Mongo
Binding of UI elements to JavaScript object models
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Work in a cross-functional team to deliver a complete user experience
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Be responsive to change requests and feature requests
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Fluent knowledge of latest HTML/CSS standards and best practices
Working knowledge of Mongo and React
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Solid Understanding of HTTP protocol and how server-side code is processed on the client
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