Full-Stack Developer (MERN)

Key Responsibilities

• Design, develop, and maintain full-stack web applications using MongoDB, Express.js, React.js, and Node.js
• Build and optimise RESTful APIs and micro services
• Work closely with product managers, designers, and developers to deliver scalable solutions
• Write clean, maintainable, and testable code
• Ensure application performance, security, and responsiveness
• Mentor junior developers and contribute to code reviews

🔹 Must-Have Skills

• Strong hands-on experience with MERN stack (MongoDB, Express, React, Node.js)
• Proficiency in JavaScript (ES6+), HTML5, CSS3
• Experience with Redux / State Management in React
• Solid backend expertise with Node.js & Express.js
• Database design, queries, and performance tuning in MongoDB
• Good understanding of REST APIs, authentication (JWT, OAuth)
• Familiarity with Git, CI/CD pipelines, and Agile methodology
• Exposure to cloud platforms (AWS, Azure, GCP) is a plus

🎯 Preferred Skills

• Experience with TypeScript
• Knowledge of GraphQL, Docker, Kubernetes
• Unit testing with Jest / Mocha
• Experience mentoring or leading small teams

🎓 Education

• Bachelor's / Master's in Computer Science, IT, or related field

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.

Founding Engineer:

As a Founding Engineer, you'll be responsible for designing, building, and launching our product to customers. Specifically,

• Since our team is lean and we plan to keep it that way - you’ll be one of the first five engineers in leading the zero-to-one journey of a product our customers are hungry for
• Lead technical design and implementation of the frontend and backend of the product with coaching and mentorship from world-class technical architects
• Have knowledge of (or learn) how to work with Shopify’s CLI
• Iterate quickly to create delightful user experiences, working closely with customers/ design partners
• Help us hire a world-class engineering team in the months ahead
• Our team is currently fully remote (with offices to be opened in Bangalore and Mumbai over next few months) and cross-border across San Francisco, Boston, and India - help us cultivate a remote-first, inclusive, diverse, and friendly culture
• Work directly with the founders with an ownership mindset

Skills and Experience:

• Prior experience working with backend tech stacks (e.g. Spring Boot, Ruby on Rails, Django, Laravel)
• Experience with service service-oriented architecture, writing REST APIs, unit testing, and architectural design
• Understanding of modern web stacks and architecture (HTTP, REST, GraphQL, WebSockets)
• Experience with SQL and NoSQL databases and other technologies (e.g. Mysql, Redis, Kafka)
• Prior experience working with frontend tech stacks (e.g. React, Angular, Vue.js)
• Prior experience working with frontend UI frameworks (e.g. Bootstrap, Tailwind CSS)

Job Description:

We are seeking an experienced Full Stack React Developer who is passionate about building and maintaining scalable mobile and web applications. The ideal candidate will have a strong background in both front-end and back-end development, with expertise in React for web and React Native for mobile development. You will work closely with our founder to implement new features, optimize performance, and ensure the highest quality user experience across both platforms.

Key Responsibilities:

• Develop and maintain the front-end of our app using React for web and React Native for mobile.

• Build and manage the back-end services and APIs to support both the mobile and web apps, including database design and integration.

• Implement responsive design principles to ensure the app works seamlessly across various devices and screen sizes.

• Optimize the app for maximum speed and scalability.

• Integrate third-party services and APIs as needed.

• Troubleshoot and debug issues to ensure the apps run smoothly on both web and mobile platforms.

Requirements:

• Proven experience as a Full Stack Developer or similar role with a focus on React and React Native.

• Strong proficiency in JavaScript, HTML, and CSS.

• Experience with back-end frameworks (Node.js, Express, Firebase etc.).

• Proficiency in database design and management (Firestore, SQL, NoSQL).

• Experience with RESTful APIs and third-party integrations.

• Familiarity with version control systems (Git).

• Knowledge of responsive design principles and mobile-first development.

• Excellent problem-solving skills and attention to detail.

• Strong communication skills and the ability to work collaboratively in a remote team environment.

Preferred Qualifications:

• Experience in building and scaling e-commerce or rental platforms.

• Familiarity with cloud services (AWS, Google Cloud, etc.).

• Understanding of CI/CD pipelines and automated testing.

• Knowledge of UI/UX design principles.

Job Purpose

We work in the latest technology, and our foundations are data structures, algorithms, solid logical reasoning, and mathematics. We are looking for very strong engineers who love coding, optimizing, and ensuring their code is the most efficient.

You will be involved with hardcore development. If you are an assembler of code or packages from different places to build something, you may not find our team to be the right fit.

You must be someone who can build anything from the ground up. Programming language should not be any barrier for you, as you should be able to pick up any programming language or underlying technology within a week.

Key Areas of Responsibility

Core development. Ready to participate in the designing, brainstorming, and development process. You must give sleepless nights to meet deadlines whenever required.

Desired Candidate Profile

Essential Skills 

• Reliable, Accountable, and Trustworthy
• Ability to understand software requirements based on a wireframe/program specification
• Familiarity with GoLang / PHP / Python / Java / C / C++ / Linux Shell and Scripting / HTML / CSS / JS / Node.js is a plus
• Effective communication skills to ensure smooth coordination of tasks with the Team Leader.
• Knowledge of MongoDB, MySQL, and PL/SQL is a plus
• Familiarity with ML, TensorFlow, and Keras is a plus
• Knowledge of web servers such as Apache, NGNIX, and the HTTP protocol is a plus.
• Knowledge of multi-process, threads, memory, and filesystem on Linux is desirable.
• Must Solve The Following

To consider you for the current opening, please make sure to understand the following question and solve it. A simple program in any programing language would do. If you cannot solve this, please do not apply.

Write a function foo(x) where foo(foo(x)) = -x (assume x to be an integer, and foo(x) has to be always real), any programming language would do. Before submitting the answers, please verify that the output of foo(foo(10)) should be -10 and foo(foo(-10)) should be 10.

JOB DESCRIPTION

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.
• Seeing through a project from conception to finished product
• Meeting both technical and consumer needs.
• Staying abreast of developments in web applications and programming languages.

Requirements:

• Degree in computer science, I.T
• Strong organizational and project management skills.
• Proficiency with fundamental front-end languages such as HTML, CSS, JavaScript, WordPress
• Proficiency with PHP
• Familiarity with database technology such as MySQL, Oracle, and MongoDB.
• Excellent verbal communication skills.
• Good problem-solving skills.
• Attention to detail.

About Company:

ESDA is a Software Development firm with a mission of providing innovative services and a vision of serving clients across the globe. It is a customer-centric Information Technology Company that specializes in Business Application Development. ESDA’s offerings are highly customizable and scalable. It also provides Web Development services and believes in providing 360-degree support to its clients. ESDA provides Web Development services like Web Designing, App Development, Digital Marketing, Graphic Designing, Hosting, Time and Material, and Gap Analysis Consultancy apart from these services, it is also working towards launching applications/software for the online market as its products.

Responsibilities:

• Build a high-quality web application from scratch.
• Design, build and maintain efficient, reusable, and reliable code to ensure the applications' best possible performance, quality, and responsiveness
• Work as part of a team developing web applications and services using Agile development methods.
• Contribute to team and organizational improvements in process and infrastructure.
• Code, test and operate Laravel based services.
• Lead the entire web application development life cycle right from concept stage to delivery and post launch support
• Troubleshoot, test and maintain the core product software and databases to ensure strong optimization and functionality
• Document the development process, architecture, and standard components
• Developing JSON, REST, and SOAP APIs/web services.

Skills Requirements

• Strong expertise in PHP programming on Laravel with deep understanding on Laravel features and libraries
• Restful API development expertise is a must
• Must be proficient in Web development technologies like HTML 5, CSS 3, Javascript, Node-JS
• Knowledge of jQuery and HTML
• Knowledge of MySQL and Query Optimization
• Knowledge of GIT
• Good written communication skills.
• You must be humble and a team player.
• Experience in handling a team and Project Management.
• Understanding of MVC design patterns
• Hands on experience with any E-commerce website.

Job Description  -

Viaan Gaming is looking for a Sr. Software Developer who is motivated to combine the art of design with the art of programming. The ideal candidate for this position will have a broad technical skill set and extensive experience in this industry. As a result, the candidate should be able to design, develop, test and deploy the products required for the company's needs. Moreover, the candidate should be able to work with other developers in determining product strategy. 

Responsibilities - Own the product : Design, Develop & Deploy  - Assume full ownership of new technology solutions - right from the requirement to release.  - Ensure Quality & sustainability of the architecture - Obsess about code quality, automated testing, continuous integration, code reviews, and documentation  - Focus on quality with continuous integration and deployment.  - Ensure the technical feasibility of UI/UX designs. - Collaborate with other team members and stakeholders. 

Required Skills 

- Mastery of the JavaScript language (ES 2017) and all the modern tooling that it requires is essential!  - Proficient in  Node Js - Express, Restify - Strong understanding of React.js, Redux, and Webpack with at least 2-4 years  experience developing software.  - Experience writing unit, integration, and functional tests, specifically for single page apps  - Proficient in design & architecting scalable products. - Expert

Knowledge of Development Tools Bitbucket, Docker & Kubernetes, Git, CI/CD with BitBucket and JIRA  - Web Server technologies:- Apache, Nginx - Understand client-server architecture, REST APIs and websocket communication.  - Good level of understanding in SCSS and CSS and familiar with responsive UI.  - Expert knowledge to handle integration & deployments Cloud computing AWS - Expert in HTTP terminologies such as Request/Response cycle, content negotiation, CORS etc  - Management of hosting environment, including database administration and scaling an application to support load changes - Optimization of the application for maximum speed and scalability  - Obsess about code quality, automated testing, continuous integration, code reviews, and documentation  - Familiarity with AWS products - Beanstalk, Elb, ECS, EC2, SNS, SQS, S3, etc.  - Great interpersonal and communication skills  - Good organizational and time-management skills 

 Qualifications ● Bachelor’s degree or equivalent in computer science / engineering