
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

About Hashtag labs
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About the Role:
We are looking for a skilled Full-Stack Developer with expertise in Python, JavaScript, and No-Code AI tools to join our dynamic team. The ideal candidate should be proficient in both backend and frontend development, capable of working with modern frameworks, and have experience in LLM prompt engineering, data extraction, and response formatting.
Key Responsibilities:
- Develop and maintain scalable backend services using FastAPI / Flask / Django.
- Build dynamic front-end applications using React / Next.js.
- Implement LLM-based solutions for data extraction and response formatting.
- Design and optimize databases using Milvus / Weaviate / Pinecone for vector storage and MongoDB / MySQL for structured data.
- Collaborate with cross-functional teams to deliver high-quality AI-driven applications.
- Ensure application performance, security, and scalability.
- Communicate technical ideas effectively through written and verbal communication.
Required Skills & Qualifications:
Technical Skills:
- Programming: Proficiency in Python and JavaScript.
- Backend: Experience with FastAPI / Flask / Django.
- Frontend: Strong understanding of React / Next.js.
- Database: Knowledge of at least one vector database (Milvus / Weaviate / Pinecone) and one relational or NoSQL database (MongoDB / MySQL).
- No-Code AI & LLM:
- Expertise in LLM Prompt Engineering.
- Experience with data extraction from context and response formatting.
Soft Skills:
- Strong written and verbal communication skills.
- Ability to collaborate effectively with teams and clients.
- Problem-solving mindset with a focus on innovation and efficiency.
Position Overview:
We are seeking a highly skilled and experienced Senior Software Developer with a strong background in front end development to join our team. The ideal candidate will have over 6 years of experience in developing web and mobile applications using React JS, React Native, Angular, and other modern technologies. You will be responsible for leading complex projects, interacting with clients, and working in a team-oriented environment.
Key Responsibilities:
• Develop and maintain mobile and web applications using React JS and React Native. • Handle DevOps tasks using tools such as Filezilla and PuTTY. • Collaborate with clients to understand their requirements and translate them into technical solutions. • Lead the design, development, testing, and deployment of applications. • Integrate third-party services such as Google Maps, Firebase, and payment gateways. • Ensure responsive UI design and integration of RESTful APIs. • Work on hybrid mobile application development for both Android and iOS platforms. • Manage system design and development, including error handling, exception management, and logging. • Perform code reviews, testing, and release management. • Utilize tools like Git, Azure DevOps, and various IDEs for development and project management.
Required Qualifications:
• Primary Skills: React JS, React Native, Angular (4+ years of experience). • Experience with iOS (Xcode) and Android (Android Studio). • Programming Languages: JavaScript, TypeScript, HTML, CSS, PHP. • Frameworks and Libraries: Redux, jQuery, Ionic (3/4), AJAX. • Databases: MS SQL Server, MySQL. • Development Tools: Sublime, Dreamweaver, Visual Studio, Xcode. • Experience with design patterns, code reviews, and testing. • Domain booking, hosting, domain migration, cPanel, PhpMyAdmin. • Familiarity with Git and Azure DevOps. • Proven track record of working on complex projects and delivering high-quality solutions. • Experience in integrating third-party APIs and handling DevOps tasks. • Strong understanding of responsive UI design and lifecycle management.
About the Role: We’re looking for a Full-Stack Developer who is comfortable working across both web and mobile platforms to join our growing tech team. You will be responsible for developing user-facing applications, building scalable backend services, and deploying high-quality digital experiences that impact real users. This is an exciting opportunity to work in a dynamic startup environment, where you’ll play a critical role in shaping both product and technology. You’ll collaborate closely with our design, backend, and product teams to develop and maintain new features across our platforms. We’re not just looking for a coder - we’re looking for someone passionate about solving problems, learning fast, and building user-first experiences across devices.
Responsibilities: Web Development Develop responsive web interfaces using React.js, JavaScript, HTML, and CSS. Optimize frontend performance for mobile and desktop platforms. Work closely with UI/UX designers to implement intuitive user experiences. Mobile App Development Build and maintain cross-platform mobile apps using React Native (or Flutter, if applicable). Ensure smooth user experience and performance across Android and iOS devices. Manage versioning, updates, and publishing to Play Store and App Store. Backend Development Develop and maintain backend APIs using Node.js and Express.js. Integrate with MongoDB / MySQL databases for data persistence. Work with third-party APIs and handle authentication, authorization, etc. DevOps & Deployment Handle app deployment pipelines and basic CI/CD workflows. Monitor, debug, and resolve production issues. Use Git and version control best practices for code collaboration.
Bonus Skills (Nice to Have): Experience with TypeScript, Firebase, AWS, or Expo Familiarity with push notifications, in-app purchases, etc. Basic knowledge of server-side rendering or Next.js Experience with analytics, performance monitoring, or testing frameworks
The Role
This role is anything but conventional- It is an opportunity to define and execute our plans and make an impact on the development of millions of children.
As our tech lead, you will work closely with the founders to crystallize and own the product roadmap and then, to bring the product vision to life through simple, elegant design & code that delights users.
You will be the key architect of the product and will help the engineering team build and maintain the product across mobile and web.
You will own development and delivery of the code- including analysis, optimization and debugging.
Key Skills
3-6 years of experience with backend and frontend web-based application development
2+ years of experience with React / Redux + HTML/CSS
2+ years of experience with Python
Have some experience with databases (SQL, MongoDB)
Have created meaningful APIs and models that are flexible and scalable
About You
You will thrive in this role at KinderPass if you:
- Have a passion for our mission to re-imagine child health and development
- Have the drive to be part of building something new - to learn, to work hard, to be your best self and to adapt to the constant change and evolution of a start-up.
- Enjoy autonomy and flexibility but can work well in a team
- Count Ownership and Reliability as your key strengths
- Can communicate effectively
Requirements:
- Bachelor's or master’s degree in computer science or equivalent work experience.
- A solid understanding of the full web technology stack and experience in developing web applications
- Strong experience with React JS framework for building visually appealing interfaces and back end frameworks like Django
- Knowledge of multiple front-end languages and libraries (e.g. HTML/ CSS, JavaScript, XML, jQuery)
- Good knowledge of object-oriented programming and data structures in Python
- Experience with NoSQL databases, web server technologies, designing, and developing APIs.
- Strong knowledge and work experience in AWS cloud services
- Proficiency with Git, CI/CD pipelines.
- Knowledge in Agile/Scrum processes.
- Experience in Docker container usage.
Roles and responsibilities:
- Develop sophisticated web applications for drone control, data management, security, and data protection.
- Build scalable features using advanced framework concepts such as Microservices, Queues, Jobs, Events, Task Scheduling, etc.
- Integrate with Third-Party APIs/services
- Use theoretical knowledge and/or work experience to find innovative solutions to the problems at hand.
- Collaborate with team members to ideate solutions.
- Troubleshoot, debug, and upgrade existing software.
- Passionate to learn and adapt in a start-up environment.
Perks:
- Hands-on experience with state of the art facilities we use for robot development.
- Opportunity to work with industry experts and researchers in the field of AI, Computer Vision, and Machine Learning.
- Competitive salary.
- Stock options.
- Opportunity to be an early part of the team and grow with the startup.
- Freedom of working schedule.
- Opportunity to kickstart and lead your own projects.
Responsibilities
• Lead and conduct weekly check-ins and doubt clearing sessions for FSD JavaScript learners.
• Assist the learners with technical queries and provide resolutions and/or coordinate with
technical instructors for resolution.
• Host weekly technical sessions in association with expert instructors for the learners as per
curriculum.
• Audit question bank contents (assessments), creating/enhancing content after due research
• Create example applications/exercises/content which can be incorporated into courses
(JavaScript track only at this time)
• Audit curriculum and assist with revision/upgrade strategies.
Skill Sets
• Strong teaching and problem solving skills
• Proficiency on Full-Stack JavaScript including ES2018 and above, React, Node.js, MongoDB
and MySQL.
• Strong communication skills.
• Willingness to learn and upgrade
Thanks and regards
The requirement is immediate and what we are looking for is as follows:
The candidate should:
- be well versed with both front & back end development. Just being versed with one wont do. Nope. Has to be both. Period.
- have had "project lead" experience & should be able to conceptualise a project from start to finish. Leaving it mid way just isn't our style...unless it's a boring conversation or a McAalo Tikki Burger...both suck equally!
- be able to think on their feet, think out of the box, push the envelope, look at the big picture, find the devil in the details, lead by example & most importantly, should be willing to go back to the drawing board. Here, thats all the office jargons we could put up here...rest needed censoring.
- have good communication skills. We don't need the best. As long as you can recite 'ba-ba black sheep' without a pause or two, it should do!
- be healthy, fit & willing to work some days from office and some days from home. To us, work life balance is very important & so is paying 50% office rent during the pandemic!









