Mean Stack Developer

Review Criteria:

• Strong Software Engineer fullstack profile using NodeJS / Python and React
• 6+ YOE in Software Development using Python OR NodeJS (For backend) & React (For frontend)
• Must have strong experience in working on Typescript
• Must have experience in message-based systems like Kafka, RabbitMq, Redis
• Databases - PostgreSQL & NoSQL databases like MongoDB
• Product Companies Only
• Tier 1 Engineering Institutes preferred (IIT, NIT, BITS, IIIT, DTU or equivalent)

Preferred:

• Experience in Fin-Tech, Payment, POS and Retail products is highly preferred
• Experience in mentoring, coaching the team.

Role & Responsibilities:

We are currently seeking a Senior Engineer to join our Financial Services team, contributing to the design and development of scalable system.

The Ideal Candidate Will Be Able To-

• Take ownership of delivering performant, scalable and high-quality cloud-based software, both frontend and backend side.
• Mentor team members to develop in line with product requirements.
• Collaborate with Senior Architect for design and technology choices for product development roadmap.
• Do code reviews.

Ideal Candidate:

• Thorough knowledge of developing cloud-based software including backend APIs and react based frontend.
• Thorough knowledge of scalable design patterns and message-based systems such as Kafka, RabbitMq, Redis, MongoDB, ORM, SQL etc.
• Experience with AWS services such as S3, IAM, Lambda etc.
• Expert level coding skills in Python FastAPI/Django, NodeJs, TypeScript, ReactJs.
• Eye for user responsive designs on the frontend.

Experienced Senior Full Stack Engineer to Build & Backend for Event Ticketing Platform Using Claude Code

Overview

We have the frontend already built in Replit for both user and admin experiences. We are looking for a very experienced software engineer to design, build, and scale a production ready backend for a high concurrency event ticketing platform.

This role is for a true senior engineer who actively uses Claude Code as part of their daily development workflow, understands how to review and harden AI assisted output, and can ship systems that hold up under real world load, QA, and security testing.

This is not a prototype or demo system. This backend must be reliable, scalable, secure, and extremely well documented.

What You Will Be Building

• Backend services for an event ticketing platform

• Multi tenant architecture supporting thousands of organizers and events

• High concurrency purchase and checkout flows

• Secure user, admin, and system level access controls

• Production deployments with secrets management, middleware, and security layers

• Observability, logging, and metrics suitable for QA and load testing

• A thoroughly documented backend that future engineers can onboard into quickly

Core Engineering Requirements

• 10 plus years of professional software engineering experience

• Expert level experience using Claude Code or equivalent AI coding agents in real production workflows

• Deep experience building backends with Node.js

• Strong experience with Supabase and PostgreSQL

• Experience deploying and scaling applications on Vercel

• Proven experience extending existing codebases safely

• Strong API design and database performance fundamentals

• Ability to reason clearly about concurrency, transactions, and failure modes

Scalability and Performance Expectations

The backend must be designed to support:

• Hundreds of thousands of ticket purchases

• Thousands of concurrent users and tenants

• Large traffic spikes during on sale windows

• Load testing across all major latency percentiles including p90, p95, and p99

• Extremely low tail latency under high concurrency

• Graceful degradation and recovery under stress

You should be comfortable designing and implementing caching strategies, queue based workflows, idempotent operations, locking mechanisms, and transactional safety.

Security and Production Readiness

You must be able to:

• Set up production environments with proper secrets management

• Implement middleware for authentication, authorization, and rate limiting

• Design secure communication between frontend and backend

• Apply industry best practices for security hardening

• Prepare the system to pass penetration testing

• Maintain clean separation of concerns and least privilege access

Documentation and Developer Experience Requirements

High quality documentation is a hard requirement for this role.

You must have experience:

• Using AI powered documentation tools to generate and maintain technical documentation

• Producing clear architectural overviews and system diagrams

• Writing detailed README files and onboarding guides

• Documenting APIs, data models, and critical flows

• Keeping documentation in sync with code changes over time

We expect the backend to be easy to understand, easy to extend, and well explained for future engineers.

How We Evaluate Candidates

We are looking for engineers who can demonstrate:

• Real production systems they have built or scaled

• Clear judgment in how they use Claude Code and validate AI generated output

• Strong opinions on production readiness backed by experience

• The ability to move fast without sacrificing quality or safety

A short paid technical task may be used that involves real backend work with production quality code and documentation.

About the Role:

We are looking for a skilled Flutter App Developer to build and maintain a high-performing online portal accessible via both mobile and web platforms. The ideal candidate will have a strong command of Flutter and Dart, experience integrating APIs, and the ability to develop responsive, scalable, and intuitive user interfaces.

Key Responsibilities:

• Develop, test, and maintain cross-platform applications for web and mobile using Flutter
• Implement responsive UI/UX based on Figma/Adobe XD designs
• Integrate third-party APIs and backend services (e.g., REST APIs, Firebase)
• Build and manage state using Provider, Bloc, or similar libraries
• Optimize app performance and resolve bugs reported by QA or end-users
• Ensure cross-browser/platform compatibility and responsiveness
• Collaborate with UI/UX designers, backend developers, and product teams
• Manage version control using Git and participate in code reviews

Required Skills:

• Strong experience with Flutter & Dart
• Experience developing Flutter Web & Mobile apps
• Familiarity with state management solutions (e.g., Provider, Bloc, Riverpod)
• Proficient in RESTful API integration and JSON handling
• Knowledge of Firebase services (Auth, Firestore, FCM) or other backend tools
• Understanding of responsive and adaptive UI principles
• Experience with Git version control

Preferred Skills (Bonus):

• Familiarity with deployment on Play Store and App Store
• Experience with web-specific optimization (SEO, PWA basics)
• Background in Android (Java/Kotlin) or iOS (Swift) development
• Unit and widget testing in Flutter
• CI/CD pipeline knowledge (Codemagic, GitHub Actions, etc.)

Qualifications:

• Bachelor’s degree in Computer Science, Engineering, or related field (preferred)
• Proven portfolio or GitHub repo with past Flutter/web apps

Why Join Us:

• Opportunity to work on a dynamic and scalable online portal
• Flexible work schedule and remote options
• Growth-oriented and collaborative work environment

Key Responsibilities:

• Rewrite existing APIs in NodeJS.
• Remodel the APIs into Micro services-based architecture.
• Implement a caching layer wherever possible.
• Optimize the API for high performance and scalability.
• Write unit tests for API Testing.
• Automate the code testing and deployment process.

Skills Required:

• At least 2.5 years of experience developing Backends using NodeJS — should be well versed with its asynchronous nature & event loop, and know its quirks and workarounds.
• Excellent hands-on experience using MySQL or any other SQL Database.
• Good knowledge of MongoDB or any other NoSQL Database.
• Good knowledge of Redis, its data types, and their use cases.
• Experience with graph-based databases like GraphQL and Neo4j.
• Experience developing and deploying REST APIs.
• Good knowledge of Unit Testing and available Test Frameworks.
• Good understanding of advanced JS libraries and frameworks.
• Experience with Web sockets, Service Workers, and Web Push Notifications.
• Familiar with NodeJS profiling tools.
• Proficient understanding of code versioning tools such as Git.
• Good knowledge of creating and maintaining DevOps infrastructure on cloud platforms.
• Should be a fast learner and a go-getter — without any fear of trying out new things Preferences.
• Experience building a large-scale social or location-based app.

Full Stack Developer Job Description:

1. Knowledge in MERN Stack is mandatory

2. Work with development teams and product managers to ideate software solutions

3. Design client-side and server-side architecture

4. Conduct Testing & Debugging, utilize script tools & write basic codes for design specifications

5. Build the front-end of applications through appealing visual design

6. Develop and manage well-functioning databases and applications

7. Write effective APIs

8. Troubleshoot, debug and upgrade software

9. Create security and data protection settings

10. Build features and applications with a mobile responsive design

11. Write technical documentation

12. Work with data scientists and analysts to improve software

Skills Required :

• Experience in React Js, Node js, Express js, MYSQL, Python
• Experience in JavaScript, HTML5, CSS3 required.
• Experience with SQL-based database engine like MySQL, Postgre, etc.
• Experience with RESTful API integration
• Experience with Node JS
• Experience with Git, GitFlow and Agile Software Development
• Familiarity with other programming languages
• Interpersonal skills to effectively work with people internally as well as working effectively with suppliers and customers
• Ability to effectively present information in team meetings and design reviews, as needed
• Ability to communicate calmly in a well thought out response, verbal and written
• Must have strong problem-solving abilities

Responsibilities:

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

- Writing reusable, testable, and efficient code.

- Design and implementation of low-latency, high-availability, and performant applications.

- Implementation of security and data protection.

- Integration of data storage solutions {mysql, redis}.

- Understanding the requirements and planning the implementation accordingly.

- Good interaction with the team. Good debugging skills.

Skills:

- Strong proficiency with JavaScript {optimized code}.

- Knowledge of Node.js and frameworks available for it {sequelize}.

- Understanding the nature of asynchronous programming and its quirks and workarounds.

- Optimization in terms of memory and time.

- Good understanding of server-side templating languages.

- Basic understanding of front-end technologies, such as HTML5, and CSS3.

- Understanding accessibility and security compliance.

- User authentication and authorization between multiple systems, servers, and environments.

- Integration of multiple data sources and databases into one system.

- Understanding fundamental design principles behind a scalable application.

- Understanding differences between multiple delivery platforms, such as mobile vs. desktop, and optimizing output to match the specific platform.

- Creating database schemas that represent and support business processes.

- Implementing automated testing platforms and unit tests.

- Proficient understanding of code versioning tools, such as Git.

• 5-7 years of relevant product design, development and testing experience
• Strong technical skills in java springboot/MVC frameworks, reactjS. API development, Cloud native solutions like lambda, azure functions is good to have.
• Database – primarily Mongo DB, Knowledge of postgres /MySQL is good to have
• DevOps - Knowledge of DevOps will be good to have
• API - Preferred experience with one of API gateway platform (Apigee, Mulesoft, Kong, WSO2)
• Good communication skills, with an ability to express and understand complex technical concepts.
• Strong analytical, problem-solving, and conceptual skills.
• Ability to work under pressure and meet tight deadlines.
• Experience of working with globally distributed teams.
• Innovative and Self learner for mentoring and problem resolutions.
• Ability to mentor and manage product teams

We are looking for a lean MERN Stack developer who is specialized in developing JavaScript-based technologies i.e. MongoDB, ExpressJS, ReactJS, NodeJS. If you have that energy and passion to create impacts, we have the perfect job for you!  Job has flexible or temporary work from home options.

Job Responsibilities-

• Requirement gathering, UML & Database modelling and documentation
• Building interactive consumer data from multiple systems and RESTfully abstract to the UI through a Node.js backend
• Defining code architecture decisions to support a high-performance and scalable product with a minimal footprint
• Address and improve any technical issues
• Collaborate well with engineers, researchers, and data implementation specialists to design and create advanced, elegant and efficient systems.
  
  

Requirements-

• BSc degree in Computer Science or similar relevant field
• Previous working experience as a MERN Stack Developer for 3+ years
• Experience with modern frameworks and design patterns
• In depth knowledge of NodeJS, ExpressJS or Restify
• Experience of implementing applications using Angular or React
• Experience for creating front end applications using HTML5, CSS3 Angular, LESS/SASS
• Hands on experience with JavaScript Development on both client and server-side
• Knowledge of Functional Testing regarding Unit Testing, Integration Testing & End-to-End Testing is required
• Strong knowledge of Testing tools is required with subject to Jest and Enzyme, React Testing Library, Puppeteer (or PhantomJS, Nightmare or Headless Chrome) and Selenium WebDriver
• Rest API development, documentation and testing using tools like Postman
  
  

Knowledge of the following will be considered as an advantage-

• Requirements gathering, modeling, documentation and project management using Visual-paradigm.com
• Javascript based workflow engines and Flow-Based Programming
• Consumer Web Development Experience for High-Traffic, Public Facing web applications,
• Experience with cloud technologies
• Creating secure RESTful-based web services in XML and JSON, JavaScript, JQuery,
• Continuous integration (Jenkins/Hudson) and version control (SVN, Git).
• Converting UI and website designs (.psd, .xd, etc) into react components using Storybook.js and creating test cases with scripts; including documentation and automated visual testing
• React with WordPress Headless CMS using frameworks like Frontity.org
• org for authorization and access control models
• io microfrontend’s architecture framework for highly modular fully flexible applications
• Speech Recognition , voice interface , and other AI functionility
• React native mobile, Electron desktop application conversion
• Heroku Pipelines, Heroku: Browser and UAT, Heroku CI, DevOps tools and processes.