Shopify App Developer

We are looking for a Full Stack Developer (MEAN Stack) who will play a key role in building and scaling JoyzAI’s product. You’ll work across frontend (Angular) and backend (Node.js/Express), build clean APIs, ship reliable features fast, and collaborate closely with product and design to deliver a smooth user experience. This is a high-impact role that blends engineering, ownership, and product thinking.

What We’re Looking For

• Strong hands-on experience with MEAN stack: MongoDB, Express, Angular, Node.js
• Ability to build REST APIs, write clean business logic, and handle validation, authentication, and error handling.
• Solid understanding of Angular frontend architecture (components, services, state management, routing, forms).
• Experience with MongoDB, including schema design, indexing, and aggregation pipelines.
• Solid knowledge of system design — ability to design scalable, maintainable, and fault-tolerant systems.
• Strong understanding of DSA (Data Structures & Algorithms) and the ability to optimize algorithms for performance, scalability, and real-world use cases.
• Comfortable with Git, deployments, debugging, and production monitoring.
• Self-driven, adaptable, and comfortable in a fast-paced startup environment.
• Good communication skills with a strong ownership mindset.

Key Responsibilities would include: 

1. Design, develop, and maintain enterprise-level Java applications. 

2. Collaborate with cross-functional teams to gather and analyze requirements, and implement solutions. 

3. Develop & customize the application using HTML5, CSS, and jQuery to create dynamic and responsive user interfaces. 

4. Integrate with relational databases (RDBMS) to manage and retrieve data efficiently. 

5. Write clean, maintainable, and efficient code following best practices and coding standards. 

6. Participate in code reviews, debugging, and testing to ensure high-quality deliverables. 

7. Troubleshoot and resolve issues in existing applications and systems. 

Qualification requirement - 

1. 4 years of hands-on experience in Java / J2ee development, preferably with enterprise-level projects.

2. Spring Framework including - SOA, AoP and Spring security 

3. Proficiency in web technologies including HTML5, CSS, jQuery, and JavaScript.

4. Experience with RESTful APIs and web services.

5. Knowledge of build tools like Maven or Gradle

6. Strong knowledge of relational databases (e.g., MySQL, PostgreSQL, Oracle) and experience with SQL.

7. Experience with version control systems like Git.

8. Understanding of software development lifecycle (SDLC) 

9. Strong problem-solving skills and attention to details.

What you’ll do

• Build and ship features end-to-end using the MERN stack
• Use AI tools to speed up development, solve bugs, and learn new patterns
• Collaborate with product and design to turn ideas into UI + backend logic
• Write clean, reusable code with proper structure and Git practices
• Learn best practices in architecture, API design, and performance
• Take feedback, grow fast, and own your work

Must-Haves:

• Bachelor’s degree in Computer Science, Engineering, or a related technical field
• 2-3 years of experience with the MERN stack
• Good understanding of JavaScript (or TypeScript), REST APIs, and MongoDB
• Clear logic, curiosity, and the ability to Google smartly
• Eagerness to learn, experiment, and grow with the team
• Comfortable using AI tools to assist in dev

Nice-to-Have:

• Exposure to tools like Firebase, Next.js, or Vercel
• Any live projects, GitHub repos, or portfolio sites
• Basic understanding of cloud deployment 

Looking for a 5+ years experienced Senior Full-stack Engineer (Backend Heavy) for a research-focused, product-based, US-based Startup.

AI Assistant for Research using state-of-the-art language models (AI Agent for Academic Research)

At SciSpace, we're using language models to automate and streamline research workflows from start to finish. And the best part? We're 

already making waves in the industry, with a whopping 5 million users 

on board as of November 2025! Our users love us too, with a 40% 

MOM retention rate and 10% of them using our app more than once 

a week! We're growing by more than 50% every month, all thanks to 

our awesome users spreading the word (see it yourself on Twitter). Andwith almost weekly feature launches since our inception, we're 

constantly pushing the boundaries of what's possible. Our team of 

experts in design, frontend, fullstack engineering, and machine learning

are already in place, but we're always on the lookout for new talent to help us take things to the next level. Our user base is super engaged and always eager to provide feedback, making Scispace one of the most advanced applications of language models out there.

We are looking for insatiably curious, always learning SDE 2 Fullstack Engineers. You could get a chance to work on the most important and challenging problems at scale.

Responsibilities:

* Work in managing products as part of SciSpace product suite.

* Partner with product owners in designing software that becomes part of researchers’ lives

* Model real-world scenarios into code that can build the SciSpace platform

* Test code that you write and continuously improve practices at SciSpace

* Arrive at technology decisions after extensive debates with other engineers

* Manage large projects from conceptualisation, all the way through deployments

* Evolve an ecosystem of tools and libraries that make it possible for SciSpace to provide reliable, always-on, performant services to our users

* Partner with other engineers in developing an architecture that is resilient to changes in product requirements and usage

* Work on the user-interface side and deliver a snappy, enjoyable experience to your users

Our Ideal Candidate would:

* Strong grasp of one high-level language like Python, JavaScript, etc.

* Strong grasp of front-end HTML/CSS, non-trivial browser-side JavaScript

* General awareness of SQL and database design concepts

* Solid understanding of testing fundamentals

* Strong communication skills

* Should have prior experience in managing and executing technology products.

Bonus:

* Prior experience working with high-volume, always-available web applications

* Experience in ElasticSearch.

* Experience in distributed systems.

* Experience working with a Start-up is a plus point.

1. Develop back-end using Node.js, database (MongoDB, Elasticsearch, etc) other latest technologies
2. Take end-to-end ownership of modules
3. Get an opportunity to solve Edu-tech problem statements

1. Bachelor's degree in computer programming, computer science, or a related field.
2. Proven 3+ years of experience working as a Back-end developer.
3. Must have a good understanding of Node.Js, Javascript, and MongoDB.
4. Must have good knowledge of Data Structures and Algorithms.
5. Strong CS fundamentals and problem-solving skills is a must.
6. Excellent analytical and time management skills.
7. Interest in the game industry, since you will be working with people crazy for developing and playing games.

1. Familiarity with discord bot, no-code automation tools like Zapier, http://Automate.io">Automate.io, Airtable and their api’s is a plus.
2. A basic understanding of front-end technologies like React.js, HTML, CSS

• We are a funded start-up, recently closed our seed funding with Kalaari Capital and with a few renowned investors in past like - Village global, FirstCheque, some experience founders such as https://www.linkedin.com/in/anandc/">Anand (FB, Snapdeal), Srini (Founder, TutorVista), https://www.linkedin.com/in/ambareesh-murty-b35803/">Ambareesh (Founder, Pepperfry) and many more!
• We’re tackling a big problem with an even bigger potential to become a launchpad for the entire game industry globally. Participants in our existing cohorts say https://www.youtube.com/playlist?list=PLVOvwIVo57tlYxGB61mSpH22j3IvM3D_p">great things about us!

This role comes with:

✔️ Competitive Salary

✔️ Annual Bonus

✔️ Stock Options

✔️ Unlimited Leaves (oh yes! we don’t track leaves)

• You need to stay active and keep an eye on the regular updates
• Efficient time management is encouraged.
• Take ownership of your work and can work independently on assigned projects/tasks.

Jhandewalan, New Delhi

Critical Primary Responsibilities:

• Work with business analysts/product managers to estimate and design effective, scalable and maintainable solutions that meet business initiatives and objectives
• Develop and design software/platform that meets business requirements and technical design
• Troubleshoot pre- and post-production implementations and Handle the team
• You will provide back-end functionality that can run smoothly from any device or browser type
• Propose new ideas when there is strong business value and stay up to date on the latest technology trends and techniques.

Critical Skills & Experiences:

• At least 9+ years of experience developing in Java technologies with equivalent experience in systems analysis, OO design, OO programming and debugging skills
• Deep Understanding of Web UI, HTML5, CSS, JavaScript, AJAX, jQuery
• Integration with 3^rd party API’s.
• ReactJS – Must (min 7 years exp ) with nodejs.
• At least 9 years of experience in Java Spring Boot Framework development
• 7 years of experience in any Cloud platform, preferably AWS.
• At least 7 years of web services and relational database experience (preferably Mysql)
• At least a year of Elastic search experience
• Experience developing RESTful web services (preferably micro services)
• Experience with UNIX/Linux command line and shell scripting
• Experience working in cross-functional Agile/Scrum teams
• Any level of experience with JIRA or any other issue tracking technology
• Experience with Java application profiling and profiling tools
• Bachelor’s degree or the above equivalent skills and years of experience
• Should be able to manage end-to-end single handedly with prior experience
• Full stack developer overall with at least 9yrs experience.

Full-stack developer  - Remote position

Are you...

• Interested in working at a successful, well-funded start-up where every team member can make a huge contribution?
• Keen to make software that people will use every single day to make their lives easier?
• Excited to work on greenfield projects with responsibility and independence?
• Ready to develop and use your skills across our frontend, backend and mobile offerings?
• Meticulous about quality, and gifted with a strong desire to write beautiful code?

About the company

KeyNest solves the key exchange problem for Airbnb users. Our worldwide network of over 4,000 shops store keys so that Airbnb guests / cleaners / contractors can pick them up whenever is convenient for them. As a global partner of Airbnb we’ve checked-in over 2 million guests.

Why we need you

As the entire Airbnb ecosystem increasingly relies on KeyNest, our customers expect us to integrate additional features without reducing the ease of use that our customers love. This is why we continue to invest in beautiful, intuitive user interfaces that integrate with every tool and are used by our customers, their guests and staff, as well as our own staff.

Our product team is lead by one of the founders and complete with a director of engineering, product manager, UX designer, one mobile developer and one senior full-stack developer who will be mentoring you. We want to work with a developer who cares about the way their code impacts the people who use it.

With a genuine passion for high quality work, attention to detail and readiness to own your own projects, you will be looking for a new and exciting challenge which allows you to use your experience to drive change and maintain the high standards of our organisation.

Our Tech Stack

• C# MVC modern tech stack
• Front end web in TypeScript & Angular or Node & React
• Test Driven Development (TDD) and follow SOLID design principles.
• EF 6.0
• SQL Server 2017
• Agile experience (Scrum, Kanban)
• TFS
• Cloud hosted in Azure with micro-services architecture

Your qualities

• 2-4 years experience in C#
• Front-end web experience in Angular
• Track record of building great products
• Excited about understanding the real problems working people come up against and fixing them with technology
• You’ll love the idea of being a big part of a small team: if you come up with a great idea, you can take it all the way to production
• Motivation and ambition to succeed in a fast-paced environment
• Not afraid to take on responsibilities

What we offer

• Crucial role in a funded, dynamic & fast-growing start-up shaking up the sharing economy
• Competitive salary based on relevant experience
• Flexible working for our most committed staff
• Unparalleled opportunities to develop your career as the company develops rapidly

If you want to join the KeyNest team, please get in touch – we look forward to meeting you.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Skills we are looking for :

- Experience in developing full-stack applications at scale in ReactJs/AngularJs & NodeJs.

- Strong knowledge and experience in HTML(5), CSS, SCSS, and Advanced JavaScript

- Good knowledge of coding RESTful APIs.

- Strong knowledge of Web Storage (Cookie, Local Storage, and Session Storage)

- Knowledge of modern authorization mechanisms, such as JWT

- Familiarity with modern front-end build pipelines and tools

- Ability to work in a lean-agile development environment.

Good to know :

- Using GIT

- Knowledge of AWS

- Familiarity with GraphQL will be a brownie point