MERN Stack Developer

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.

What You’ll Be Doing

• 🛠 Write code for web and mobile apps, fix bugs, and work on features that people will actually use.
• 💡 Join brainstorming sessions and help shape our products.
• 🚀 Things move fast here, and you’ll learn as you go.
• 🤝 Work closely with everyone—designers, developers, and even marketing folks.
• 🔧 Diving into Our Tech Stack: React, React Native Node, Express, Python, FastAPI, and PostgreSQL.

What We’re Looking For

We’re not looking for perfection, but if you’re curious, motivated, and excited to learn, you’ll fit right in!

For Backend Engineers

• 💻 Strong knowledge of Python, FastAPI, and PostgreSQL.
• 🔍 Solid understanding of Low-Level Design (LLD) and High-Level Design (HLD).
• ⚡ Ability to optimize APIs, manage databases efficiently, and handle real-world scaling challenges.

For Frontend Engineers

• 💻 Expertise in React Native.
• 🎯 Knowledge of native Kotlin (Android) and Swift (iOS) is a big bonus.
• 🚀 Comfortable with state management, performance optimization, and handling platform-specific quirks.

General Expectations for All Engineers

• 🛠 While you’ll be specialized in either frontend or backend, you should be good enough to fix bugs in both.
• 🔍 You enjoy figuring things out and experimenting until you get it right.
• 🤝 Great communication skills and a collaborative mindset.
• 🚀 You’re ready to dive in and make things happen.

Interview Process

If we like your application, Be ready to:

1. Solve a data structures and algorithms (DSA) problem in your preferred programming language.
2. Answer questions about your specialized area (frontend/backend) to showcase your depth of knowledge.
3. Discuss a real-world problem and how you’d debug & fix an issue in both frontend and backend

Why Join Us?

• 💡 Your work will matter here—no busy work, just real projects with real outcomes.
• 🚀 Help shape the future of our company.
• 🎉 We’re all about solving cool problems and having fun while we do it.

Job Objectives:

- Integration of user- facing elements developed by front- end developers with server- side logic

- Optimize web applications to maximize speed and scale. Support diverse clients from high- powered desktop computers to small mobile devices

- Optimization of the application for maximum speed and scalability - Implementation of security and data protection

- Collaborate with senior management, operations & business team

- Building Rest APIs and maintain Database optimizations

Looking For:

- Great understanding of PHP, Node, react, Express, Socket.io, MVVM framework

- Worked on e- commerce website, server handling and deployments scripts

- The one who has worked on customer facing product for 2 years

- Strong knowledge of MERN stack

- Experience designing scalable, fault tolerant systems and databases.

Job Description :

9 to 12 years' experience in software engineering

Bachelor's degree in computer science or engineering discipline

• Strong coding and debugging skills with experience in web technologies including one or more of the following: React, Angular, Node, D3 (Java API's Javascript etc.), AJAX, CSS
• Worked with authentication technologies like SAML, OAuth, SSL etc.
• Hands on experience with one or more web and application server technologies such as Apache Tomcat, Nginx, Jersey server, OSGi and other relevant frameworks
• Hands on experience with code control and code review tools like Git, Gerrit
• Good exposure to databases, SQL queries
• Fast executor with a track record of delivering complex projects on time; responds under pressures of time and uncertainty
• Strong written, editing, proofreading and oral communication
• Strong inter-personal communication and collaboration skills.
• The candidate must be able to work independently & must possess strong communication skills.
• A good team player, high level of personal commitment & 'can do' attitude.
• Strong communication skill to communicate at all levels, which includes interaction within the team & with senior management.
• The candidate should have proactive approach towards problem solving.
• Good analysis skills in order to troubleshoot and resolve the problems.

• Extensive experience in building REST APIs
• Experience in building, managing, and enhancing backend / server-side development using java / java scripts. Expertise in NodeJS is preferred
• The person must have built systems that consume and process volumes of data from various sources. Experience in handling and managing data in NoSQL databases such as Mongodb.
• Extensive experience of building custom UI for web using the popular frameworks like angular and react. Experience in developing mobile UI is nice to have
• Experience of working with code repositories such as Github and GitLab.
• Fluent written and spoken English.
• Experience of working on Cloud environments and experience in AWS is preferred.
• Experience in Dockers and Kubernetes for deployments

JavaScript, jQuery, Angular or node, HTML, CSS, API consumption, DB knowledge, building responsive web apps.