Lead Fullstack Developer

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.

Role: Lead Java Developer

Work Location: Chennai, Pune

No of years’ experience: 8+ years

Hybrid (3 days office and 2 days home)

Type: Fulltime

Skill Set: Java + Spring Boot + Sql + Microservices + DevOps

Job Responsibilities:

Design, develop, and maintain high-quality software applications using Java and Spring Boot.

Develop and maintain RESTful APIs to support various business requirements.

Write and execute unit tests using TestNG to ensure code quality and reliability.

Work with NoSQL databases to design and implement data storage solutions.

Collaborate with cross-functional teams in an Agile environment to deliver high-quality software solutions.

Utilize Git for version control and collaborate with team members on code reviews and merge requests.

Troubleshoot and resolve software defects and issues in a timely manner.

Continuously improve software development processes and practices.

Description:

8 years of professional experience in backend development using Java and leading a team.

Strong expertise in Spring Boot, Apache Camel, Hibernate, JPA, and REST API design

Hands-on experience with PostgreSQL, MySQL, or other SQL-based databases

Working knowledge of AWS cloud services (EC2, S3, RDS, etc.)

Experience in DevOps activities.

Proficiency in using Docker for containerization and deployment.

Strong understanding of object-oriented programming, multithreading, and performance tuning

Self-driven and capable of working independently with minimal supervision

oC#, 

oASP.NET, 

oSOLID principles, 

oDDD, 

oUnit/integration testing, 

oReact / typescript, 

oSQL, 

oAgile SCRUM 

oOracle, SQL Server, Snowflake 

∙Additional expectations 

oAWS, 

oDocker 

oterraform, 

oCoding with Copilot, 

oGMP or other strict compliance projects, 

oCode reviewing, 

oPair programming, 

oInterest in Functional Programing 

• BTech, BE, BS degree in Computer Science, a similar technical field of study, or equivalent practical experience.
• 6+ years experience in web and software development.

• 3+ years of experience with the microservices architecture.
• At least 1 year of experience in leading a team.
• Demonstrated experience in Node, Mongo, Python2/3, Express, ReactJS.
• Experience with testing frameworks like Mocha, Jest, Jasmine etc.
• Experience with asynchronous messaging using RabbitMQ/Apache Kafka.
• Ability to work independently and multi-task effectively.
• Flexible and willing to accept a change in priorities as necessary.
• Strong attention to detail.

Design and build applications, bug fixing and improving application performance.

• Delegate tasks and achieve daily, weekly, and monthly goals.
• Enforce processes to improve productivity of the team.
• Collaborate with cross-functional teams to define, design, and ship new features.
• Work on continuously discovering, evaluating, and implementing new technologies to maximize

development efficiency.

Qualifications:

BTech/BE in computer science, electrical, electronics or related fields 5+ years of full stack design and development experience High emotional intelligence, empathy and collaborative approach. Experience in Angular Javascript frameworks, CSS, HTML5, NodeJS, ExpressJS, MongoDB to handle full stack web development. Experience with developing rich dynamic front end applications using Angular and CSS frameworks like BulmaCSS, Angular Material, Bootstrap, etc. Knowledge of GraphQL would be an added advantage. Knowledge of Cloud services like AWS, Heroku, Azure is preferable. Should be a quick learner to keep up with the pace of the ever changing world of technology as the candidate will get excellent exposure to the latest and trending Cloud based Saas technologies and best practices while working with varied customers based across the globe.

Responsibilities:

Develop web applications covering end to end software development life cycle right from writing UI code using Angular to backend API code using NodeJS and managing databases like MongoDB, MySQL, etc. Involved in full stack code management from Git check-ins to running automated builds and deployments using DevOps practices to deploy to public cloud services like AWS, Azure, Heroku, etc. Handling full-stack web development workflow right from front end to backend to CI/CD workflows. Design and Develop the tech architecture and work closely with CEO and CTO of the company Drive and guide with work of other engineers on the team

This is a leadership role and candidate is expected to wear multiple technical hats including customer interactions and investor discussions

Role: D365 CE / CRM Developer

Experience: 3-7 years

Location: Hyderabad (Initially remote)

You will need to:

• Configure and customize Dynamics 365.
• Have a strong understanding on one of these 3 areas Sales, Service, Marketing & Field Service.
• Possess strong know how on the Microsoft Biz apps data model to perform end to end architectural design and review.
• Pose an in-depth understanding of the Dynamics capabilities to fit business logic inside Dynamics 365 in a seamless way to attain customer requirement with no adverse impact.
• Be a good coder and a reviewer to ensure the customization code quality is at the highest level possible and comply to the Organization standard.
• Be a hands-on coder to build POC on-the-fly and should be able to present to the customers.
• Be responsible for building custom applications, modifications, integrations, data conversion routines and custom reports.
• Provide technical support for project life cycle.

You must have:

• 3-7 years of experience in design, development, and delivery across the Dynamics 365 CRM landscape.
• Proficiency in developing, customizing, integrating, deploying, and supporting multi-channel Dynamics 365 CRM systems.
• Experience with the use of the Dynamics 365 CRM SDK.
• Absolute know-how of Microsoft Dynamics 365 CE Platform, its capability, its data model, security/ access control, web services and other integration approach.
• Strong knowledge on Canvas Model Driven Apps and common data service (CDS).
• Strong .NET framework and C# development experience including CRM API, REST and SOAP.
• Hands on experience in server-side coding, workflows, Java scripts & plugins.
• Strong designing skills around HTMS, CSS etc.
• Strong experience on SQL Server database, Integration services & reporting services.
• Knowledge on leveraging cloud infrastructure

You may have:

• Knowledge of Power Platform usage is a big plus with experience on Power Apps & Power Automate.
• Strong experience on ADO.NET, ASP.NET, WCF & Workflow foundation.
• Strong knowledge on Model Driven Apps and common data service (CDS).
• Knowledge on Data Volume metric analysis, database tuning, detecting bottleneck will be a plus.

Desired qualifications and skills:

• Graduate Degree (B.E/ B.Tech, BCA)
• Microsoft certification for Dynamics 365 CRM would be an added advantage.
• Excellent business communication skills with effective presentation and demonstration skills.
• Should have a strong learning orientation with regards to new technologies and implementing them.
• Should be a self-starter and initiative taker.
• Should possess strong analytical skills and be detail oriented

• Develop, test, and deploy fast and scalable web apps
• Assist high-end web applications using , Node JS , Mongo DB , Angular9+
• Responsible for solving complex technical issues and giving quick solutions
• Active in client communication to understand functional requirements
• Assist in design, coding and testing
• Provide quick and simple technical solutions
• Ensure quality projects are delivered within defined timelines
• Maintain database to ensure strong optimization and functionalities
•  Designing and maintenance of fully functional large relational and non-relational databases
• Timely deployment of web apps on the cloud
•  Server management and cloud-based infrastructure
• Establishment and integration of development tools as required
• Identification of application issues when deploying the apps
• App deployment on the cloud along with solving debugging issues
• Coding architecture for frontend and backend
• Building interactive consumer data
• Creating features in apps that have a mobile responsive design
• Testing applications and fixing bugs, along with security and data protection features
• Establish code architecture decisions for supporting scalability and good performance
• Makes use of popular front-end frameworks like Bootstrap, LESS, etc and design UI components
• Participation with developers for the creation of scalable RESTful APIs
• Conducting code reviews of developers

• A Bachelor’s in a related computer science field.
• Expertise and experience in the four main technologies – MongoDB, ExpressJS, Angular, and NodeJS
• Knowledge of HTML/CSS, jQuery, Python, OOPS, UI/UX design, AWS, Git, and design framework, web services, JSON, AJAX, cryptography, and security,
• Experience implementing applications using Angular or React
• Experience creating front end applications using HTML5, Angular, LESS/SASS frontend CSS frameworks like Bootstrap, etc.
• In depth knowledge of NodeJS, ExpressJS or Restify
• Experience implementing applications using Angular
• Hands-on experience with JavaScript Development on both client and server-side
• Experience with modern frameworks and design patterns,
• Experience with cloud technologies also a plus

As a product engineer, you will be responsible for continuous improvement of Cashfree experience for all our customers and end-users. You will dream big but identify and take small steps towards achieving that goal. You will receive great feedbacks at every step of the development cycle from your peers to our customers and end-users.

You may be working on architecting the money disbursement flow or creating most-friendly interface for consumer payment. All our engineers identify as generalist and building products that are useful and delightful are core to our engineering culture.

You're more than a coder. You wil be part of entire product process, from conceptualizing till post-launch evaluation. You should have deep empathy for the users to minimize the gap between what we build and what they need. Have sound judgement to balance between code writing speed and it's maintainability. Knowledge of variety of server-side/frontend frameworks is desirable but not compulsory.