Java React

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.

The ideal candidate will work on developing carbon-credit–based workflows, dashboards, and user platforms, while owning end-to-end product development — including frontend, backend, API integrations, data pipelines, and scalable system architecture.What We’re Looking For

Frontend:

React.js / Next.js, Angular

JavaScript / TypeScript

Web3 integrations (preferred)

Backend:

Node.js, Python, Django, Ruby

If you are passionate about creating meaningful impact in the Climate Tech space and want to be part of a fast-growing, innovative team, we’d love to hear from you.

MERN Stack Developer

Location: Surat, Gujarat (No WFH )

Job Summary:

We are looking for a Full Stack Developer (MERN) with hands-on experience in building highly scalable, performance-driven applications. The ideal candidate should have a deep understanding of both front-end and back-end development, microservices, and database optimization for large-scale systems. You will be responsible for designing, developing, and maintaining applications that can handle high concurrency (1,000+ active users) while ensuring performance, reliability, and scalability.

This role involves working closely with cross-functional teams — including product managers, designers, and DevOps engineers — to deliver cutting-edge, enterprise-grade solutions.

Roles & Responsibilities:

• Design and develop scalable and distributed web applications using the MERN stack (MongoDB, Express.js, React/Next.js, Node.js).
• Build and optimize RESTful APIs for high-performance, concurrent environments.
• Architect and manage MongoDB databases, ensuring high availability, efficient query performance, and scalability.
• Implement queueing systems (e.g., BullMQ, RabbitMQ, Kafka, or Redis Queues) for background jobs and asynchronous processing.
• Optimize server and client performance to support real-time data updates and high concurrent user loads.
• Collaborate with DevOps to improve deployment pipelines, containerization (Docker), and cloud scalability.
• Conduct thorough testing, profiling, and debugging to identify performance bottlenecks and optimize both code and infrastructure.
• Participate in code reviews, architecture discussions, and sprint planning to ensure technical excellence and scalability across all layers.

Qualification / Requirements:

• Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience).
• 1 + years of hands-on experience in full-stack development using the MERN stack.
• Proven experience working on applications supporting 1,000+ concurrent users or large-scale distributed systems.
• Strong expertise in:
• Node.js (asynchronous programming, clustering, performance optimization)
• Next.js & React.js (SSR, CSR, and dynamic rendering)
• MongoDB (aggregation pipelines, indexing, schema design for scalability)
• Practical experience with message queues (BullMQ, RabbitMQ, Kafka, or Redis Streams).
• Familiarity with caching mechanisms (Redis, Memcached) to optimize performance.
• Experience with Docker and microservices-based architectures is a plus.
• Good understanding of API design, authentication mechanisms (JWT, OAuth), and security best practices.
• Experience working in Agile environments and using Git-based version control.

Nice to Have:

• Exposure to serverless computing (AWS Lambda).
• Experience with monitoring tools (New Relic, Datadog, ELK Stack).
• Knowledge of CI/CD pipelines and automated deployment workflows.
• Experience in real-time communication (WebSockets, Socket.io).

Looking for Java Fullstack Developer

Having Experience in Java, Spring , Microservices

React and Redux

Roles and Responsibilities:

• Developing new user-facing features using React.js
• Developing and implementing highly responsive user interface components using react concepts.
• Writing application interface codes using JavaScript following react.js workflows.
• Experience with RESTful APIs
• Troubleshooting interface software and debugging application codes.
• Create database schemas that represent and support business processes.
• Implement automated testing platforms and unit tests.
• Optimize application for performance and speed.
• Implementation of security and data protection.
• Provide technical support to users.

Skills:

• At least 5 years of experience as a Java Developer or similar role
• Strong expertise in Java programming language and working Knowledge on Back-end technologies such as Spring/Spring Boot.
• In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
• Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
• Experience with user interface design.
• Familiarity with database technology such as MySQL, MongoDB.
• Good knowledge of Unit Testing.
• Experience with at least one of the Cloud Services such as AWS, GCP, Azure are plus.
• Familiarity with SCRUM methodologies
• Strong organizational and project management skills.
• Excellent verbal communication skills.
• Analytical and logical skills
• Good problem-solving skills.

Qualification:

• 3-4 years of experience working as a ReactJS Developer or in a similar role.

What we offer:

• Flexible working hours
• Up to 12 Lakh insurance
• Work-life balance

• 7+ years of overall software development experience. 

• Hands-on experience with backend languages like Python, Java and Javascript. 

• 2+ years of distributed cloud systems architecture. 

• Good understanding of SQL and experience in designing database structures. 

• Understanding of frontend development and frameworks at a high level. 

• High availability and fault tolerance systems design experience. 

• Test Driven Design practitioner and good understanding of unit Testing and comprehensive test suite building. 

• Customer focused with good analytical thinking and problem solving. 

• Metrics based progress monitoring and reporting capabilities. 

• Flexibility to interface with cross timezone teams. 

• Should have led cross-functional teams like frontend, backend, UI/UX, devops, QA, etc. 

• Experience in security practices for web applications. 

Note: Hands on experience in Angular is also must.

Should have delivered successful end-to-end development to deployment experience on Web applications and Api’sin last 4-12 years

·         Extensive experience with C#, .Net Core, Web API, Oops, Design patterns & principles.

·         Experience in MySQL is a must and added advantage to have knowledge of NOSQL database.

·         Extensive experience in writing rest full API

·         Experience in using version controls such as GIT, Continuous Integration, Continuous Delivery

·         1-2 year of experience in Angular 2/4/5/6/7/8/9/10/11/12, Typescript, JavaScript, and Bootstrap with Restful API’s is a plus

·         Good to have experience in testing and debugging new programs using

• Working with the product team to develop new features focused on improving the user experience
• Improving existing features and working on streamlining client implementations through improved tools
• Improving our technical architecture and building out a continuous integration pipeline
• Modernizing our front-end in new frameworks
• Everything else - our team is small and you'll likely be involved in almost every tech-related thing going on
  
  

Requirements

• 1+ years of experience building consumer-facing web apps
• You are interested in the full-stack opportunity and love building a feature from start to finish
• Self-starter with a deep interest in tech - we want someone who will come in with opinions, and shape our engineering practices and decisions for the better
• An eye for design - you'll have an important role in making the product look great
• Believe in our mission and love the idea of working in education to help students succeed
  
  

Technologies you'll work with:

• NodeJS, http://sails.js/">Sails.JS
• http://react.js/">React.js, Redux, Redux-Saga
• Kubernetes, Postgres, ElasticSearch, Redis, RabbitMQ
• Whatever else you decide - we're constantly re-evaluating our stack and tools
• Having prior experience with the technologies is a plus, but not mandatory for skilled candidates.

Benefits

• Remote Option - You can work from any location of your choice
• Reimbursement of Home Office Setup
• Competitive Salary
• Friendly atmosphere
• Flexible paid vacation policy

If you are an analytical problem solver with strong Web Development knowledge and a passion for teamwork and innovation, we have the perfect job for you!

We are looking for a Technical Lead to join our award-winning, talented team, building global software products for automation of drones for various commercial applications.

A thorough understanding of all of the components of FlytBase platform and infrastructure is required. You will need to take ownership of your projects, which involves detailing requirements after discussion with the Product Owner, building user interfaces, developing and maintaining web apps with a focus on user experience. 

We offer an excellent team environment, flexible working hours, and various opportunities to advance your career. We are looking for a long-term relationship and committed individuals to join our team. This position is based out of our development centre in Pune, India.

Skills/Experience

• 3-6 yr experience as a MEAN Stack developer
• Strong expertise with Angular2+, NodeJS, ExpressJS, HTML5, CSS, JSON, jQuery, Bootstrap, Socket.io, Git, CI/CD integration and writing cross-browser compatible code.
• Knowledge of unit testing (Jasmine/Mocha), integration testing frameworks
• Understanding of fundamental design principles behind a secured, scalable, production ready application development and deployment

Roles/Responsibilities

• Work as part of an agile team developing applications, design sprints and lead the team ensuring deliveries are met.
• Ensure best practices in Web application development
• Bring in passion, dedication, and lead-from-the-front quality to build global products
• Participate in the complete software development lifecycle and write code that is maintainable, clear, and concise.
• Bring in technical and architectural leadership, and mentor team members enabling them to achieve their goals.
• Ability to balance strategic and tactical solutions.
• Manage application deployment practices in AWS, considering security, scalability and reliability
• Manage/evolve automated testing setup for backend and frontend for faster bug reporting and fixing
• Contribute to team and organizational improvements in process and infrastructure
• Effectively use tools and ingenuity to identify and fix defects before they become a problem

Good to Have

• Knowledge of other python-based server-side frameworks such as Flask or Django.

We are always on the lookout for like-minded individuals sharing our passion for autonomous drones.