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.

Looking for a passionate developer and team player who wants to learn, contribute and bring

fun & energy to the team. We are a friendly startup where we provide opportunities to explore

and learn a lot of things(new technology/tools etc.,) in building quality products using

best-in-class technology.

Responsibilities

● Design and develop new features using Full-stack development

(Java/Spring/React/Angular/Mysql) for a cloud(AWS/others) and mobile product

application in SOA/microservices architecture.

● Design awesome features and continuously improve them by exploring alternatives /

technologies to make design improvements.

● Performance testing with Gatling (Scala).

● Work with CI/CD pipeline and tools (Docker, Ansible) to improve build and

deployment process.

● Working with QA to ensure the quality and timing of new release deployments.

Skills/Experience

Good coding/problem solving skills and interest in learning new things will be the key.

Time /Training will be provided to learn new technologies/tools.

● 4 or more years of professional experience in building web/mobile applications using

Java or similar technologies (C#, Ruby, Python, Elixir, NodeJS).

● Experience in Spring Framework or similar frameworks.

● Experience in any DB (SQL/noSQL)

● Any experience in front-end development using React/Vue/Angular/similar

frameworks.

● Any experience with Java/similar testing frameworks (JUnit/Mocks etc).

Build the future of 3D virtual and hybrid events with Sarcon. Fast-growing profitable startup working with top brands across the globe.
We are recognized by the Government of Singapore & are a NASSCOM 10K startup. We also have a bunch of prestigious recognitions to our name. Our technology has powered virtual, hybrid and physical events of all sizes, from large international conferences to focused B2B meets in industries ranging from defense, information technology, aerospace to medicine and nanotechnology. The engineering team behind Sarcon consists of patent-holding engineers having worked for the likes of Intel, Qualcomm, Oracle, and L-Brands. We are continually working on adding products and features to our arsenal to make your events world-class.

In this role you would get to work closely not only with a highly smart and dedicated group of technologists but also with the sales and customer success teams as you help deliver the delightful experience customers have started to expect from Sarcon.

The role would be of interest to you if:

1) You want to build a world-class B2B2C product (A product used by businesses and end customers).
2) Are excited by the prospect of building cutting edge, scalable,secure, and intuitive applications.

3) You want to work on a product that is seeing exponential growth in demand and are excited by the challenges of building technology to support this demand

4) You want to work on stuff where the impact of your work will be seen by hundreds of thousands of industry leaders across industries

5) You want to push yourself to your limits and build a world-beater

Bonus-
Experience with Docker
Setting up scalable systems on the cloud 

Key responsibilities:

1. Work on full-stack development with Primary Laravel PHP, JavaScript & Secondary- NodeJS,React

2. Work on building high-performance scalable applications for the global audience

Salary is negotiable for rockstar candidates.

• 2-4 years of experience working with web platforms (at a corporate, startup, or digital agency)

Work Ethic & Requirements

• Experience with the development of large-scale websites and a strong understanding of web development technologies, third-party applications and platforms, and social media.
• You should be able to handle multiple projects at the same time.
• You should have the ability to motivate, support, and understand teams and easily work with everyone from our UX/visual designers to tech developers to content strategists.
• You should be motivated and organized. A proactive attitude is most important.
• Ability to effectively manage time, prioritize tasks and work within deadlines with little or no supervision
• The ability to work both autonomously and as part of a team 

Tech Skills

• Python/Django
• React JS
• Node JS