
Hashtag Labs is looking for MERN stack developer who is an expert in MongoDB, Express, React and Node. He/she should be proficient in JavaScript and use HTML, CSS and JavaScript to handle front-end operations and JavaScript with Node.js to handle back-end operations.
Roles and Responsibilities:-
- Ability to translate Wireframes into functional web apps.
- Binding of UI elements to JavaScript object models
- Creating RESTful services with Node.js
- MERN stack developer must have proven experience in front & back-end development
- Work in a cross-functional team to deliver a complete user experience
- React.JS NodeJS developer must know MongoDB, Express, Node.js, & React.
- Create Unit and Integration tests to ensure the quality of code
- Be responsive to change requests and feature requests
- Write code that is cross-platform and cross-device compatible
- MERN full stack developer must have the ability to wear many hats and learn new technologies quickly
- For MERN stack developer job, candidate must have good Knowledge of Node Debugging
- Understanding & proficiency in REST APIs.
- MERN stack developers should know Git Repository and Jira.
- Integration of data storage solutions [RDBMS, NoSQL DB]
Experience: 2+ years
Job Location: Lucknow, Uttar Pradesh

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Company Description
13kbs.com is a forward-thinking company committed to delivering cutting-edge solutions that empower businesses to excel in the digital era. We bridge the gap between innovation and practicality, ensuring efficiency, security, and scalability at every step.
Our key services include AI-powered solutions, scalable full-stack development, cloud & AWS expertise, comprehensive firewall & compliance reviews, and automation testing. At 13kbs.com, we deliver high-impact solutions that align with the evolving demands of technology while maintaining a strong focus on privacy and reliability.
Role Description:
MERN Stack Developer (On-Site – Rajkot)
This is a full-time, on-site role for a MERN Stack Developer based in Rajkot. The developer will be responsible for developing, testing, and maintaining seamless user experiences using technologies such as MongoDB, Express.js, React, and Node.js.
Daily responsibilities include collaborating with cross-functional teams to define, design, and ship new features; writing clean, efficient, and well-documented code; debugging and optimising applications; and ensuring application scalability and security.
- Qualifications & RequirementsExperience: 1–3 years of hands-on experience in MERN stack development
- Proficient in: MongoDB/Postgres, React, and Node.js
- Front-end expertise: HTML, CSS, JavaScript
- Strong understanding of: RESTful APIs and web services
- Familiarity with: Git or other version control systems
- Experience with cloud services: Especially AWS
- Education: Bachelor’s degree in Computer Science, Engineering, or related field
- Soft Skills: Strong problem-solving abilities and effective communication skills
- Language Requirement: Candidate must be able to understand and communicate in Gujarati
- Location: Must be based in Rajkot or nearby areas
- Work Type: Full-time, work from office only (no remote option)
Important Note
Only apply if you meet all the above criteria, including 1–3 years of experience, proximity to Rajkot, and Gujarati proficiency.
When life gives you lemons and you can code both front and back with equal zest, you’re probably a Full Stack Developer we’d love on our team.
At Lemon Yellow, we’re looking for someone who thrives on building end-to-end web solutions using the MERN stack. From crafting intuitive front-ends to developing efficient, scalable back-end systems, you’ll be involved in shaping digital products from the ground up. If turning design mockups into pixel-perfect, high-performance applications excites you, we’re ready to build with you.
1. Core Responsibilities
- Build and maintain end-to-end web applications using the MERN stack.
- Act as a bridge between design and development to bring ideas to life with clean, scalable code.
- Support digital campaigns through intuitive and functional tech implementations.
- Design, develop, and deploy scalable front-end and back-end components.
- Write clean, maintainable code while collaborating with designers, marketers, and other developers.
- Translate product requirements and UI/UX wireframes into fully functional digital solutions.
2. API & Integration Management
- Implement RESTful APIs and connect third-party tools and services.
- Ensure smooth data exchange across platforms through secure integrations.
- Manage user authentication and authorization using mechanisms like JWT or OAuth.
3. Code Quality & Optimization
- Debug, profile, and optimize applications for performance and reliability.
- Maintain unit and integration test coverage for code robustness.
- Conduct code reviews and help improve internal coding standards.
4. Agile Collaboration
- Actively participate in agile activities: daily stand-ups, sprint planning, retros, and demos.
- Contribute to task estimation and cross-functional problem-solving.
- Stay responsive to project shifts and quick delivery needs.
5. Continuous Learning & Innovation
- Stay up to date with the latest development trends, tools, and practices.
- Share learnings and explore creative solutions for technical challenges.
- Experiment with emerging technologies and suggest process improvements.
Requirements
- Bachelor's degree in Computer Science, Software Engineering, or a related field.
- Minimum 1 year of hands-on experience building production-ready web applications using MongoDB, Express.js, React.js, and Node.js.
- Strong command of JavaScript (ES6+), HTML5, and CSS3.
- Experience with Git and version control systems
- Familiarity with RESTful API design, JSON, and authentication mechanisms (JWT, OAuth)
- Familiarity with cloud platforms (AWS, Azure, or GCP) and containerization (Docker).
- Basic understanding of CI/CD pipelines and automated testing.
- Strong analytical and problem-solving mindset.
- Detail-oriented with a passion for clean, maintainable code.
- Collaborative attitude with good verbal and written communication skills.
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.
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.
Skills
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.
- Expertise in backend programming with Node.js and MongoDB.
- Experience with React.js and redux.
- Material UI and 3rd party libraries.
- Experience with clean code writing practices like avoiding callback hell like promises, async.
- Thorough understanding of Node.js and its core principles.
- Experience with popular React.js workflows (such as Flux or Redux).
- Familiarity with newer specifications of ECMAScript.
- Experience with data structure libraries (e.g., Immutable.js).
- Familiarity with RESTful APIs.
- Knowledge of modern authorization mechanisms, such as JSON Web Token.
- Familiarity with modern front-end builds pipelines and tools.
- A knack for benchmarking and optimization.
- Familiarity with code versioning tools (such as Git, SVN, and Mercurial).
Responsibilities:
- Build Node.js APIs using microservices.
- Rewriting backend code with microservices architecture & Unit tests.
- Developing new user-facing features using React.js.
- Building reusable components and front-end libraries for future use.
- Translating designs and wireframes into high-quality code.
- Optimizing components for maximum performance across a vast array of web-capable devices and browsers.
Experience: 7+ years
Responsibilities:
• Work with development teams and product managers to ideate software solutions
• Design client-side and server-side architecture
• Build the front-end of applications through appealing visual design
• Hands on experience in Spring Boot and good knowledge of MySQL, MongoDB
• Hands on experience in building RESTful based APIs
• Develop and manage well-functioning databases and applications
• Write effective APIs
• Test software to ensure responsiveness and efficiency
• Troubleshoot, debug and upgrade software
• Create security and data protection settings
• Build features and applications with a mobile responsive design
• Write technical documentation
Requirements:
• 7+ Yrs experience as a Full Stack Developer.
• Proven experience as a Full Stack Developer or similar role
• Experience developing Rich Internet based applications
• Experience with Spring boot and Angular 6 or above.
• Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
• Knowledge of multiple back-end languages ( Java, NodeJS) and JavaScript frameworks (e.g. Angular, React)
• Familiarity with databases (e.g. MySQL, MongoDB), web servers (e.g. Apache) and UI/UX design
• Excellent communication and teamwork skills
• Great attention to detail
• Organizational skills
• An analytical mind
Required qualification:
*) Any degree from a reputed university
*) Proven software development experience and Java/J2EE skills development.
We are looking for a blockchain developer who will be responsible for designing, implementing, and supporting a distributed blockchain-based network. Your primary responsibility will be analyzing requirements, designing blockchain technology around a certain business model, and building and launching a blockchain network.
Also, the Position requires maintenance & further development of the existing platform
- Research, design, develop, and test blockchain technologies
- Document new solutions as well as maintain of existing ones
- Be involved in the global blockchain community—work on implementing and integrating the latest improvement proposals
- Requirements
- Hands-on experience in Ethereum, Solidity, Golang, Nodejs, Javascript, NFT, ERC Tokens, DeFi, DAPPS
- Strong software development background, Expertise in Rest API design and development.
- Experience working in NoSQL databases like MongoDB.
- Strong knowledge of common algorithms and data structures
- Proficient understanding of code versioning tools, such as Git, and familiar with concepts of Cloud-based microservices.
Must have worked with Blockchain products and played a vital role to build that application as a developer

Part time option available.
Totally Remote.
Need to join within two weeks.
We are looking for a highly skilled computer programmer who is comfortable with both front and back end programming. Full Stack Developers are responsible for developing and designing front end web architecture, ensuring the responsiveness of applications and working alongside graphic designers for web design features, among other duties.
Full Stack Developers will be required to see out a project from conception to final product, requiring good organizational skills and attention to detail.
Full Stack Developer Responsibilities:
• Developing front end website architecture.
• Designing user interactions on web pages.
• Developing back end website applications.
• Creating servers and databases for functionality.
• Ensuring cross-platform optimization for mobile phones.
• Ensuring responsiveness of applications.
• Working alongside graphic designers for web design features.
• Seeing through a project from conception to finished product.
• Designing and developing APIs.
• Meeting both technical and consumer needs.
• Staying abreast of developments in web applications and programming languages.
Full Stack Developer Requirements:
• Degree in Computer Science.
• Strong organizational and project management skills.
• Proficiency in fundamental front end languages such as HTML, CSS, and JavaScript.
• Familiarity with JavaScript frameworks such as Angular JS, React, Node JS, and Amber.
• Proficiency in server-side languages such as Python, Ruby, Java, PHP, and .Net.
• Familiarity with database technology such as MySQL, Oracle, and MongoDB.
• Excellent verbal communication skills.
• Good problem-solving skills.
• Attention to detail.









