Full Stack Developer – MERN Stack

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.

Key Responsibilities & Technical Expertise

• Design, develop, customize, and maintain Magento 2 websites, extensions, and modules.
• Build and enhance Progressive Web Applications (PWA) using Magento PWA Studio, React.js, and GraphQL.
• Integrate third-party systems including payment gateways, ERP, CRM, and other API-based services.
• Optimize site performance, caching, and scalability using tools like Redis, Varnish, and Elasticsearch/OpenSearch.
• Configure caching, indexing, and CDN for improved site performance.
• Expertise in HTML5, CSS3, LESS/SASS, JavaScript, jQuery, and TypeScript.
• Skilled in React.js, Redux, GraphQL, and REST APIs for modern frontend development in Magento PWA.
• Proficient in Magento theme development, custom module development, and UI component customization.
• Set up and manage Docker-based environments for local development, staging, and production deployments.
• Implement security best practices, perform regular updates, and maintain backup and disaster recovery strategies.

Looking for a full stack software developer

• At least 4 years of experience in software engineering.

• Experience in troubleshooting, debugging applications and proactive participation in testing and bug fixes.

• Ability to build scalable applications working on a continuous delivery environment, writing production ready code.

• Knowledge of backend technologies like Java(Preferred), Spring Boot , Microservices, JSON, Python(Good to have).

• Knowledge of frontend technologies like React, Angular.

• Knowledge of database technologies like Postgres(Preferred), Mysql, PostGres, Sql server.

• No sql Database knowledge, Elastic search(Good to have).

• Knowledge on CI/CD tools like Jenkins.

• Knowledge on Event streaming tools like Kafka platform.

• Knowledge of Source Code Management systems Git, github.

Roles and Responsibilities
1. Ability to work on diverse backend stack such as Node JS, Java, Express JS
2. Ability to work on diverse frontend stack such as React JS, Angular 6/7/8/9, HTML5, CSS3

3. Ability to deliver quick POC’s using cutting edge technologies.

4. Preparing reports, manuals and other documentation on the status, operation and maintenance of software.

5. Design, develop, and unit test applications in accordance with established standards

6. Developing, refining, and tuning integrations between applications. Analysing and resolving technical and application problems.

7. Ability to debug application.

8. Should have complete knowledge on developing RESTful Services.

9. Should be able to also work in agile development methodology.
10. Work with designated JavaScript framework to design, develop, and debug web applications
11. Can work on Angular and Integrate backend services
12. Work with the team to manage, optimize, and customize multiple web applications
13. Manage end to end module lifecycle management of the product
14. Push and pull codes via Git repository

Competency Requirements

1. Experience in NodeJS, Java and development using AngularJS / ReactJS
2. Experience in front end frameworks such as Angular.js, React.js, Bootstrap, Foundation etc
3. Experience in client/server application development
4. Knowledge of agile development methodologies
5. Knowledge of unit testing theory
6. Knowledge of AWS cloud
7. Experience in Java, Python and Go will be added advantage

Are you a champion in your domain, driven by a passion for development, eager to kickstart your career in Full Stack Engineer, and hungry for a new and exciting challenge? Look no further! At Argon-Quber, we are on a mission to revolutionize the tech industry, and we are seeking exceptional Full Stack Engineer Inters like you to join our elite team.

We pride ourselves on being a hub of innovation, where cutting-edge technologies and groundbreaking ideas converge. As a Full Stack Engineer Intern, you will be at the forefront of this revolution, pushing the boundaries of what is possible and shaping the future of software development.

Job Description:

We are seeking a highly skilled and motivated Full Stack Engineer Intern with 0-1 years of experience to join our dynamic team. As a Full Stack Engineer Intern, you will be responsible for learning, developing and maintaining both front-end and back-end applications. You will collaborate with cross-functional teams to design, develop, and implement cutting-edge solutions.

What You Will Do:

• Collaborate with stakeholders and end-users to gather feedback and iterate on product features to ensure an exceptional user experience.
• Design, develop, and deploy scalable and secure full stack applications.
• Collaborate with UI/UX designers and product managers to translate wireframes and prototypes into functional web applications.
• Develop and maintain server-side logic using modern programming languages and frameworks.
• Build efficient and reusable front-end components and libraries.
• Implement responsive and mobile-friendly user interfaces.
• Integrate third-party APIs and services to enhance application functionality.
• Ensure high-performance and availability of applications through code optimization and thorough testing.
• Debug and resolve technical issues reported by clients or stakeholders.
• Stay up-to-date with emerging technologies, industry trends, and best practices in web development.
• Participate in code reviews and provide constructive feedback to peers.
• Collaborate with a diverse team of developers, designers, and product managers to create innovative and user-friendly web applications.
• Participate in the entire software development lifecycle, from requirements gathering and design to development, testing, and deployment.
• Contribute to the architecture and technical decisions of our projects, leveraging your expertise to drive technical excellence.
• Continuously improve your skills and stay updated on the latest technologies, frameworks, and best practices in full stack development.
• Embrace agile methodologies and actively participate in sprint planning, stand-ups, and retrospectives to ensure successful project delivery.
• Take ownership of your work and deliver high-quality code that is scalable, efficient, and maintainable.
• Be a problem solver and find creative solutions to overcome challenges encountered during the development process.

What we're looking for:

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 0-1 years of professional experience as a Full Stack Developer.
• Proficiency in front-end development technologies such as HTML, CSS, JavaScript (ES6+), and modern front-end frameworks like React, Angular, or Vue.js.
• Strong understanding of server-side languages like Node.js, Python, or Ruby, and related frameworks such as Express, Django, or Ruby on Rails.
• Experience with relational databases (e.g., MySQL, PostgreSQL) and NoSQL databases (e.g., MongoDB, Redis).
• Familiarity with version control systems (e.g., Git) and Agile development methodologies.
• Knowledge of cloud platforms such as AWS, Azure, or Google Cloud.
• Solid understanding of RESTful APIs and the ability to integrate them into applications.
• Experience with testing frameworks (e.g., Jest, Jasmine, PyTest) and writing unit tests.
• Strong problem-solving and analytical skills.
• Excellent communication and collaboration skills to work effectively in a team environment.
• Ability to handle multiple projects and prioritize tasks effectively.
• Preferred candidate is to be in Bangalore location.
• Experience with containerization technologies (e.g., Docker, Kubernetes).
• Knowledge of serverless architecture and deployment (e.g., AWS Lambda, Azure Functions).
• Familiarity with DevOps practices and CI/CD pipelines.
• Understanding of GraphQL and related frameworks (e.g., Apollo).
• Knowledge of TypeScript for both front-end and back-end development.

Duration:

This is a paid internship position for a duration of 6 months. The starting date will be determined based on the availability of the selected candidate.

Here's why Argon-Quber is the ultimate destination for top-tier Engineers:

• Innovation is Our DNA: At Argon-Quber, we thrive on innovation and embrace disruptive technologies. Join our team and be a part of our relentless pursuit of groundbreaking solutions that redefine industry standards.
• Empowerment and Autonomy: We believe in empowering our developers to take ownership of their work. At Argon-Quber, you will have the autonomy to make strategic decisions, influence the architectural direction, and unleash your full potential.
• World-Class Team: Join forces with a team of brilliant minds, industry experts, and thought leaders who share a common goal: to create exceptional software solutions. Collaborate, learn from each other, and be inspired by the collective brilliance that surrounds you.
• Unparalleled Growth Opportunities: We are committed to your professional growth. Whether you aspire to become a technical guru, a team lead, or even venture into management, Argon-Quber provides you with the resources, mentorship, and support needed to climb the career ladder.
• Impact at Scale: Your work at Argon-Quber will reach millions of users, transforming industries and improving lives. You will have the opportunity to create solutions that leave a lasting impact, disrupt markets, and shape the digital landscape.
• Culture of Excellence: At Argon-Quber, we foster a culture of excellence where only the best is accepted. We celebrate achievements, recognize exceptional talent, and create an environment where your brilliance is acknowledged and rewarded.
• Work Hard, Party Harder: We believe that a healthy work-life balance leads to increased creativity and productivity. Enjoy a flexible work environment, social events, team outings, and a supportive atmosphere that values your well-being.

Location:

This position is based in Bangalore, India. Please only apply if you are currently residing in or willing to relocate to Bangalore.

If you are ready to unleash your true potential, work on game-changing projects, and be a part of Argon-Quber, an organization that will empower you to achieve greatness, then look no further.

• Join us in shaping the future of technology and revolutionizing the way the world experiences software. Apply now and embark on an extraordinary journey at Argon-Quber where your skills will be honed, your creativity will thrive, and your impact will be unmatched. Let's build the future together!

Job Title- PHP Developer

Location : Mumbai, Navimumbai

Job Description-

We are looking for a PHP Developer responsible for managing back-end services and the interchange

of data between the server and the users

Responsibilities

- Integration of user-facing elements developed by front-end developers

- Build efficient, testable, and reusable PHP modules

- Solve complex performance problems and architectural challenges

Skills And Qualifications

- Strong knowledge of PHP web frameworks {such as Laravel, Codeigniter, depending on your technology stack}

-Any JS Framework experience like NodeJS, Angular JS, React JS will be an advantage.

- Understanding the fully synchronous behavior of PHP

- Understanding of MVC design patterns

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

- Knowledge of object oriented PHP programming

- Understanding accessibility and security compliance

- Strong knowledge of the common PHP or web server exploits and their solutions

- Understanding fundamental design principles behind a scalable application

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

- Integration of multiple data sources and databases into one system

- Familiarity with limitations of PHP as a platform and its workarounds

- Creating database schemas that represent and support business processes

- Familiarity with SQL/NoSQL databases and their declarative query languages

- Proficient understanding of code versioning tools, such as Git

• Extensive experience in building REST APIs
• Experience in building, managing, and enhancing backend / server-side development using java / java scripts. Expertise in NodeJS is preferred
• The person must have built systems that consume and process volumes of data from various sources. Experience in handling and managing data in NoSQL databases such as Mongodb.
• Extensive experience of building custom UI for web using the popular frameworks like angular and react. Experience in developing mobile UI is nice to have
• Experience of working with code repositories such as Github and GitLab.
• Fluent written and spoken English.
• Experience of working on Cloud environments and experience in AWS is preferred.
• Experience in Dockers and Kubernetes for deployments

• Design and documentation of the CashLobe technology stack
• Code / implement the CashLobe technology stack
• Deploy and maintain the CashLobe technology stack
• Engage with leadership team to help evolve the CashLobe technology stack offerings

• Have pre-built deployment pipelines CI/CD across environments DEV/STAGING/PROD
• Knowledge of developing using Python and specifically the data/number crunching frameworks like NumPy, pandas, scikit, etc.
• Experience in the Fintech domain and specifically the banking & accounting systems

• Bachelor’s degree in Computer Science, Software Engineering, or a related discipline
• 4+ years experience working in an IT environment
• 4+ years of Object-oriented design, functional programming
• Node JS API Development (Firebase API development is a plus)
• Angular or VUE or React JS Front end Development (VUE Js Experience is a plus)
• HTML / CSS responsive development
• Experience using any database
• Experience developing in an Agile / SCRUM Environment
• Experience developing mission-critical applications
• Strong business and technical acumen
• Excellent verbal and written communication skill