
Senior Full Stack dev backend for Ticketing Platform Using Claude Code
at Express Text
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.

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Responsibilities
Technical Development & Delivery
- Lead the development and release process for assigned products and platform components.
- Design, develop, and maintain secure, scalable, and high-performing applications using .NET Core / .NET 6+.
- Develop modern front-end interfaces using JavaScript frameworks (React / Next.js) or Blazor.NET / WPF.
- Collaborate with developers to integrate user-facing elements with server-side logic and APIs.
- Build and maintain RESTful APIs, microservices, and backend services.
Product & Cross-Functional Collaboration
- Work closely with Product, QA, and DevOps teams to deliver new features and enhancements.
- Participate in technical discussions and product planning, helping prioritize development tasks and improvements.
- Act as a technical subject matter expert for relevant product modules when needed.
Database & Platform Support
- Work with Cosmos DB and SQL-based databases to support application functionality.
- Collaborate with DBAs to design and maintain database schemas, queries, and stored procedures.
- Support UAT and production environments, troubleshooting technical issues and ensuring system reliability.
Quality, Security & Performance
- Work with Quality Assurance teams to ensure the delivery of high-quality and reliable software.
- Implement secure coding practices and support vulnerability assessments and security audits.
- Monitor and optimize application and API performance.
- Contribute to logging, monitoring, and alerting mechanisms to support system observability.
Mentorship & Team Development
- Mentor and support junior developers and new team members.
- Promote best practices in coding, testing, and documentation across the engineering team.
- Contribute to continuous improvement of development standards and engineering processes.
Absolute Must have’s (essential requirements)
- Strong expertise in C# and .NET Core / .NET 6+ development.
- Experience with at least one of the following front-end technologies:
- Blazor.NET or WPF
- JavaScript frameworks such as React or Next.js
- Strong understanding of object-oriented programming, design patterns, and domain-driven design.
- Experience with SQL Server / PostgreSQL and Entity Framework Core.
- Familiarity with tools such as Syncfusion, Datatables, and AutoMapper.
- Experience building and integrating RESTful APIs and microservices.
- Proficiency with Git and CI/CD pipelines.
- Exposure to cloud platforms such as Azure or AWS.
- Strong problem-solving, debugging, and analytical skills.
Good to have (preferred/optional requirements)
- Experience working with modular application frameworks such as ABP.IO.
- Understanding of payment systems, financial platforms, or transaction processing systems.
- Experience working in Agile / Scrum environments.
- Familiarity with DevOps practices, Docker containers, and Kubernetes.
Key Responsibilities:
- Develop and maintain scalable web applications using Node.js, Express, and React
- Collaborate closely with UI/UX teams and backend developers
- Write clean, maintainable, and efficient code
- Integrate APIs and third-party services
- Utilize Docker and Kubernetes (basic level)
- Participate in code reviews and optimize performance…
Skills
- Strong proficiency in JavaScript/TypeScript, React.js, Node.js, and Express.js
- Good understanding of RESTful APIs and system architecture
- Experience with MongoDB, MySQL, or similar databases
- Familiarity with Docker and basic Kubernetes
- Hands-on with Git/GitHub
- Exposure or experience with Generative AI (GenAI) tools/technologies
You’ll be joining a small team working at the forefront of new technology, solving the challenges that impact both the front-end and back-end architecture, and ultimately, delivering amazing global user experiences.
Responsibilities
• Work across the full stack, building highly scalable distributed solutions that enable positive user experiences and measurable business growth
• Ideate and develop new product features in collaboration with domain experts in healthcare and genomics
• Develop state-of-the-art enterprise standard front-end and backend services
• Develop cloud platform services based on a container orchestration platform
• Continuously embrace automation for repetitive tasks
• Ensure application performance, uptime, and scale, maintaining high standards of code quality by using clean coding principles and solid design patterns
• Build robust tech modules that are Unit Testable, Automating recurring tasks and processes
• Engage effectively with team members and collaborate to upskill and unblock each other
Other Skills
• Innovation and thought leadership
• UI - UX design skills
• Interest in learning new tools, languages, workflows, and philosophies to grow
• Communication
Who are we?
HaystackAnalytics is a company working in deep technology of genomics, computing, and data science for creating the first-of-its-kind clinical reporting engine in healthcare. We are a new but well-funded company with a tremendous amount of pedigree in the team (IIT Founders, IIT & IIM core team). Some of the technologies we have created are a global first in infectious disease and chronic diagnostics. As a product company creating a huge amount of IP, our Technology and R&D team are
our crown jewels. With the early success of our products in India, we are now expanding to take our products to international shores
We are looking for a driven, curious and sincere full-stack software engineer having 0-2 years of professional experience. They will be assigned to a 0 to 1 project which presents a great opportunity to learn and grow.
Roles & Resposibilities:
- You will be involved in full-stack development
- Working on relational as well as non-relational databases.
- Writing and maintaining high-quality code.
- Learning the code base and improving your coding skills.
Desired skills and qualities:
- Bachelor degree in computer engineering or related field.
- Atleast 6 months of full-time or internship experience in Javascript.
- Data structures and algorithms.
- Strong understanding of object-oriented programming.
- Ability to communicate ideas clearly(verbal/written).
- HTML and CSS.
Role: FullStack Developer
Experience: 1+ years
Location: Madurai
Mode: Work from office
We have vast experience in delivering high-quality products with significant output on time. We are specialized in creating web and mobile applications with the latest technology. We are expert in developing a perfect solution for rental marketplace services and on-demand businesses done by our proficient team of experts with strong experience in development.
- Minimum of 6 months of real-time experience in React/Node.js/Angular
- Good understanding of structured and unstructured databases (MySQL and MongoDB)
- Knowledge of isomorphic React is an added advantage
- Experience in implementing well-known React workflows such as Redux
- Ability to learn new technologies and languages quickly
- Proficient understanding of code versioning tools, such as Git
- Experience with Javascript backend framework like Express.js
- Good time-management skills
- Experience with Restful API services
- Delivering a complete front end application
- Professional, precise communication skills
- Deep knowledge of Angular/Node.js/React practices and commonly used modules based on extensive work experience
- Good knowledge in Javascript and able to handle Array & Objects built-in methods
- A Good logical thinking and problem-solving skills
- A good team player
PHP
MySQL
Our Tech Stack:
React JS | Python | Django | Mongo | Elastic Search | AWS | Docker | Redshift
Experience: 3+ Years
Job Location: Nagpur
Required Skills:
-3+ years total of experience in SDLC
-Should have a strong knowledge of Node JS, Vue JS, Javascript.
-Experience in Version Control Systems like GIT, Bitbucket.
Proven Skills with HTML5, CSS, MySQL and Postgres database etc.
-Ability to complete all phases of the software development life cycle.
-Should have a working knowledge of using the latest development tools and techniques.
-Basic knowledge of front end UI design preferred.
-Must have good problem solving and analytical skills.
-Must be a team player, having good communication skills, self-starter
-The ability to pick up new technology is needed.
Nice to have:
-.Netcore, MVC & SQL Server
-Amazon s3 basic knowledge and digital ocean basic knowledge
We’re looking for an experienced (2+ years) full stack developer to build web applications and API's, who will be responsible in handling various B2B clients, developing new API's working with business and product teams and, building data pipelines and storage systems for large amounts of data.
Your responsibilities will include:
• Build a framework for handling large volumes of data.
• Scaling API's with lowest response times.
• Onboarding client data in a B2B tech integration.
• Cross-team communication and translating into products.
• Develop and deploy new features to facilitate related procedures and tools if necessary
• Write “clean”, well-designed code
• Contribute in all phases of the development lifecycle
• Passion for best design and coding practices and a desire to develop new bold ideas.
• Troubleshoot, test and maintain the core product software and databases to ensure strong optimization and functionality
• Follow industry best practices
Job Skills
• Good python scripting and hands-on experience with Django framework
• Experience managing full stack, multi-language, multi-framework software development
• Back-end: Proficient in developing APIs across different platforms of web application servers. Experience in web server technologies in Django/Python is necessary.
• Database: Able to understand RDBMS schema and develop software to access data via SQL queries or DB mapper. Familiarity with SQL/NoSQL (MySQL, MongoDB) databases and their declarative query languages
• Front-End: Good understanding of front-end technologies, such as Object Oriented JavaScript, HTML5, and CSS3. Should have knowledge of Angular JS, Bootstrap, Express JS, Node JS etc.
• Understanding of MVC design patterns and other industry standard design patterns.
• Understanding fundamental design principles behind a scalable application
• Excellent analytical, problem-solving skills and programming skills
• Demonstrated ability to define and drive adoption of software development best practices, standards, processes, methodologies
• Strong communication skills, both verbal and written, and the ability to listen effectively
• Proficient understanding of code versioning tools, such as Git








