AI Architect

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.

We're looking for an experienced Full-Stack Engineer who can architect and build AI-powered agent systems from the ground up. You'll work across the entire stack—from designing scalable backend services and LLM orchestration pipelines to creating frontend interfaces for agent interactions through widgets, bots, plugins, and browser extensions.

You should be fluent in modern backend technologies, AI/LLM integration patterns, and frontend development, with strong systems design thinking and the ability to navigate the complexities of building reliable AI applications.

Note: This is an on-site, 6-day-a-week role. We are in a critical product development phase where sthe peed of iteration directly determines market success. At this early stage, speed of execution and clarity of thought are our strongest moats, and we are doubling down on both as we build through our 0→1 journey.

WHAT YOU BRING:

You take ownership of complex technical challenges end to end, from system architecture to deployment, and thrive in a lean team where every person is a builder. You maintain a strong bias for action, moving quickly to prototype and validate AI agent capabilities while building production-grade systems. You consistently deliver reliable, scalable solutions that leverage AI effectively — whether it's designing robust prompt chains, implementing RAG systems, building conversational interfaces, or creating seamless browser extensions.

You earn trust through technical depth, reliable execution, and the ability to bridge AI capabilities with practical business needs. Above all, you are obsessed with building intelligent systems that actually work. You think deeply about system reliability, performance, cost optimization, and you're motivated by creating AI experiences that deliver real value to our enterprise customers.

WHAT YOU WILL DO:

Your primary responsibility (95% of your time) will be designing and building AI agent systems across the full stack. Specifically, you will:

• Architect and implement scalable backend services for AI agent orchestration, including LLM integration, prompt management, context handling, and conversation state management.
• Design and build robust AI pipelines — implementing RAG systems, agent workflows, tool calling, and chain-of-thought reasoning patterns.
• Develop frontend interfaces for AI interactions including embeddable widgets, Chrome extensions, chat interfaces, and integration plugins for third-party platforms.
• Optimize LLM operations — managing token usage, implementing caching strategies, handling rate limits, and building evaluation frameworks for agent performance.
• Build observability and monitoring systems for AI agents, including prompt versioning, conversation analytics, and quality assurance pipelines.
• Collaborate on system design decisions around AI infrastructure, model selection, vector databases, and real-time agent capabilities.
• Stay current with AI/LLM developments and pragmatically adopt new techniques (function calling, multi-agent systems, advanced prompting strategies) where they add value.

BASIC QUALIFICATIONS:

• 4–6 years of full-stack development experience, with at least 1 year working with LLMs and AI systems.
• Strong backend engineering skills: proficiency in Node.js, Python, or similar; experience with API design, database systems, and distributed architectures.
• Hands-on AI/LLM experience: prompt engineering, working with OpenAI/Anthropic/Google APIs, implementing RAG, managing context windows, and optimizing for latency/cost.
• Frontend development capabilities: JavaScript/TypeScript, React or Vue, browser extension development, and building embeddable widgets.
• Systems design thinking: ability to architect scalable, fault-tolerant systems that handle the unique challenges of AI applications (non-determinism, latency, cost).
• Experience with AI operations: prompt versioning, A/B testing for prompts, monitoring agent behavior, and implementing guardrails.
• Understanding of vector databases, embedding models, and semantic search implementations.
• Comfortable working in fast-moving, startup-style environments with high ownership.

PREFERRED QUALIFICATIONS:

• Experience with advanced LLM techniques: fine-tuning, function calling, agent frameworks (LangChain, LlamaIndex, AutoGPT patterns).
• Familiarity with ML ops tools and practices for production AI systems.
• Prior work on conversational AI, chatbots, or virtual assistants at scale.
• Experience with real-time systems, WebSockets, and streaming responses.
• Knowledge of browser automation, web scraping, or RPA technologies.
• Experience with multi-tenant SaaS architectures and enterprise security requirements.
• Contributions to open-source AI/LLM projects or published work in the field.

WHAT WE OFFER:

• Competitive salary + meaningful equity.
• High ownership and the opportunity to shape product direction.
• Direct impact on cutting-edge AI product development.
• A collaborative team that values clarity, autonomy, and velocity.

We are inviting a Fullstack Engineer to join our dynamic product team at BrandLabs. If you’re passionate about building end-to-end web applications and enjoy working across the stack, we’d love to connect!

Key Responsibilities:

• Develop, deploy, and maintain web applications using NextJS, Typescript, NodeJS, NestJS, and ExpressJS.
• Collaborate with the product, design, and backend teams to deliver seamless user experiences.
• Write clean, maintainable, and scalable code following industry best practices.
• Participate in technical discussions, code reviews, and architectural planning.
• Integrate third-party services, APIs, and tools where required.
• Ensure application performance, security, and responsiveness.

Required Skills:

• 1-2 years of hands-on experience in fullstack development.
• Strong proficiency in NextJS, Typescript, NodeJS, NestJS, and ExpressJS.
• Good understanding of RESTful APIs and microservice architecture.
• Ability to troubleshoot, debug, and optimize applications for performance.

Good to Have:

• Experience building n8n workflows for automation.
• Exposure to AI/ML-based projects or AI service integrations.
• Familiarity with DevOps, CI/CD pipelines, and cloud platforms.

Additional Information:

• Location: We prefer candidates based in or around Thane, Mumbai for better collaboration.

Project Links: Please share your GitHub, portfolio, or links to live projects you’ve contributed to.

C#, .Net Core MVC - React frontend - Insurance Industry 

We are looking for a mature seasoned key player who will help build our team.
Are you a mentor and love code in general? We are seeking a senior .NET developer and hopefully other programming languages with at least 4 years of experience to be part of a team to write, debug, and test .NET code. You will be analyzing, troubleshooting issues and managing the implementation updates with current and planned customizations. The ideal candidate should have a strong understanding of object-oriented programming, relational databases, and software architecture principles. 

Our work environment, mentoring, teaching, growing constantly nurturing, loving, and respect. To enjoy our work and move through tasks as painlessly as possible. We believe in helping and being helpful. Staying positive and being there when you have that umm, ‘I don’t know how to solve this’ we want you to feel completely 100%  comfortable to get on a call, share a screen and move through it. We have the “If you are stuck over 15 mins ask someone rule”. and “ask a dumb question at least twice a day rule”. This is how we want our work environment. 

We work fully remotely via Slack / Zoom / Whatsapp

Requirements:

4+ years of experience or more. 
ASP.NET, C#, MVC, and JavaScript.
Troubleshoot and resolve issues and bugs

Must be able to communicate in English speaking and writing, our CEO is American and talks fast. We are looking for adults in the room, people who can communicate, think and reason as key team members.

Work US East coast time zone EST GMT-5

As an Architect, you would be expected to:

• Own the overall architectural decisions, design, and development of technology.
• Lead a multi-disciplinary team responsible for the full lifecycle of product development and testing.
• Play a significant role in the career development of others. Work with engineering teams to provide continuous architecture and design mentor-ship / leadership and be a source of support that ensures successful product delivery and operational excellence in production.
• Actively participate in design reviews, improve product delivery and align teams across the organization towards coherent architectural strategies.
• Deliver artifacts that set the standard in your organization for engineering excellence, from designs to algorithms to implementations.
• Help others understand when it is appropriate to create new versus reuse or extend existing software solutions.
• You will develop systems, component architectures, and APIs that meet the test of time. Articulate and evangelize architectural principles that ensure that system components fit and last and align with the company's business direction.

You would be a good fit if:

• You will have worked in past faced product companies and at least 8 years of experience
• Should have been part of scalable product development cycles with either large data handling or large transaction processing exposure.
• You will also possess a good understanding of object-oriented design, algorithms, Web Applications Architectures, and Microservices.
• Experience developing cloud software services and an understanding of design for scalability, performance, and reliability
• Champion a culture of innovation, in an environment that requires high levels of scalability, security, and reliability.
• You are an excellent collaborator & communicator. You know that start-ups are a team sport. You listen to others, aren’t afraid to speak your mind and always try to ask the right questions. You are excited by the prospect of working in a distributed team and company.
• Solid coding skills with the ability to drive teams through massive refactoring exercises & improve coding standards across large codebases.
• Hungry to make an impact ethically and effectively, with deep empathy for end consumers.
• Any open-source code or contributions to OSS projects would be a bonus!

What do we offer?

• A multicultural and diverse team of colleagues from all over the globe Mission-driven and fast-paced, entrepreneurial environment
• Competitive salary and other benefits
• Hybrid of work-from-home and work-from-office with full management support during Covid time
• A collaborative and flat company culture

What’s in it for you?

Do you truly want to make a difference and revolutionize the lives of millions of business owners? Do you thrive in an environment where moving at light speed and embracing new challenges every day is essential? If yes, Lummo (earlier BukuKas) is the perfect place for you!

Position – Principal Architect

Location – Bangalore/Mumbai/Remote

About Us

upGrad is an online education platform building the careers of tomorrow by offering the most industry-relevant programs in an immersive learning experience. Our mission is to create a new digital-first learning experience to deliver tangible career impact to individuals at scale. upGrad currently offers programs in Data Science, Machine Learning, Product Management, Digital Marketing, and Entrepreneurship, etc.

upGrad is looking for people passionate about management and education to help design learning programs for working professionals to stay sharp and stay relevant and help build the careers of tomorrow.

• upGrad was awarded the https://iamaiida.in/index.php">Best Tech for Education by IAMAI for 2018-19
• upGrad was also ranked as one of the https://www.linkedin.com/pulse/linkedin-top-startups-2018-25-most-sought-after-india-linkedin/">LinkedIn Top Startups 2018: The 25 most sought-after startups in India
• upGrad was earlier selected as one of the https://www.fastcompany.com/most-innovative-companies/2017/sectors/india">top ten most innovative companies in India by FastCompany.
• We were also https://www.ft.com/content/9150579a-f24c-11e6-95ee-f14e55513608">covered by the Financial Times along with other disruptors in Ed-Tech
• upGrad is the https://yourstory.com/2017/01/startup-india-learning-program-offers-free-online-entrepreneurship-course/">official education partner for Government of India - Startup India program
• Our program with IIIT B has been ranked https://www.analyticsindiamag.com/top-10-courses-and-training-programs-on-artificial-intelligence-in-india-ranking-2018/">#1 program in the country in the domain of Artificial Intelligence and Machine Learning

About the Role

A highly motivated individual who has experience in architecting end to end web based ecommerce/online/SaaS products and systems; bringing them to production quickly and with high quality. Able to understand expected business results and map architecture to drive business forward. Passionate about building world class solutions.

Role and Responsibilities

• Work with Product Managers and Business to understand business/product requirements and vision.
• Provide a clear architectural vision in line with business and product vision.
• Lead a team of architects, developers, and data engineers to provide platform services to other engineering teams.
• Provide architectural oversight to engineering teams across the organization.
• Hands on design and development of platform services and features owned by self - this is a hands-on coding role.
• Define guidelines for best practices covering design, unit testing, secure coding etc.
• Ensure quality by reviewing design, code, test plans, load test plans etc. as appropriate.
• Work closely with the QA and Support teams to track quality and proactively identify improvement opportunities.
• Work closely with DevOps and IT to ensure highly secure and cost optimized operations in the cloud.
• Grow technical skills in the team - identify skill gaps with plans to address them, participate in hiring, mentor other architects and engineers.
• Support other engineers in resolving complex technical issues as a go-to person.

Skills/Experience

• 12+ years of experience in design and development of ecommerce scale systems and highly scalable SaaS or enterprise products.
• Extensive experience in developing extensible and scalable web applications with
  • Java, Spring Boot, Go
  • Web Services - REST, OAuth, OData
  • Database/Caching - MySQL, Cassandra, MongoDB, Memcached/Redis
  • Queue/Broker services - RabbitMQ/Kafka
  • Microservices architecture via Docker on AWS or Azure.
• Experience with web front end technologies - HTML5, CSS3, JavaScript libraries and frameworks such as jQuery, AngularJS, React, Vue.js, Bootstrap etc.
• Extensive experience with cloud based architectures and how to optimize design for cost.
• Expert level understanding of secure application design practices and a working understanding of cloud infrastructure security.
• Experience with CI/CD processes and design for testability.
• Experience working with big data technologies such as Spark/Storm/Hadoop/Data Lake Architectures is a big plus.
• Action and result-oriented problem-solver who works well both independently and as part of a team; able to foster and develop others' ideas as well as his/her own.
• Ability to organize, prioritize and schedule a high workload and multiple parallel projects efficiently.
• Excellent verbal and written communication with stakeholders in a matrixed environment.
• Long term experience with at least one product from inception to completion and evolution of the product over multiple years.

Qualification

B.Tech/MCA (IT/Computer Science) from a premier institution (IIT/NIT/BITS) and/or a US Master's degree in Computer Science.

Years of Exp – 14+

Must Have:

1. Strong proficiency with .Net Core API development
2. Experience with caching approaches for API
3. Hands on with SQL Server and its variation among popular databases
4. Well versed with stored procedures, query plans, altering the indexes, and troubleshooting the performance holdups
5. Skilled at performance optimization of .NET APIs
6. Experience & Knowledge on Open API specification & swagger documentation
7. Experience in building Cloud Native Applications
8. Experience in Microservices architecture
9. Has worked on the deployment of applications using Docker
10. Has Knowledge of Kubernetes
11. Has Experience with Cache systems like Redis.

Nice to Have:

1. Familiar with .NET design patterns
2. Performance tuning of SQL Stored Procedures

Note: We looking for immediate joiners. We expect the offered candidate should join within 15 days. Buyout reimbursement is available for 30 to 60 days notice period applicants who can ready join within 15 days.

As technical lead, you will be responsible for complete product development including 

1. Identification of technology
2. Shaping engineering practices
3. Hiring engineering team
4. Shaping up the product