Senior Python Full Stack Developer

Job Description – Full Stack Developer (React + Node.js)

Experience: 5–8 Years

Location: Pune

Work Mode: WFO

Employment Type: Full-time

About the Role

We are looking for an experienced Full Stack Developer with strong hands-on expertise in React and Node.js to join our engineering team. The ideal candidate should have solid experience building scalable applications, working with production systems, and collaborating in high-performance tech environments.

Key Responsibilities

• Design, develop, and maintain scalable full-stack applications using React and Node.js.
• Collaborate with cross-functional teams to define, design, and deliver new features.
• Write clean, maintainable, and efficient code following OOP/FP and SOLID principles.
• Work with relational databases such as PostgreSQL or MySQL.
• Deploy and manage applications in cloud environments (preferably GCP or AWS).
• Optimize application performance, troubleshoot issues, and ensure high availability in production systems.
• Utilize containerization tools like Docker for efficient development and deployment workflows.
• Integrate third-party services and APIs, including AI APIs and tools.
• Contribute to improving development processes, documentation, and best practices.

Required Skills

• Strong experience with React.js (frontend).
• Solid hands-on experience with Node.js (backend).
• Good understanding of relational databases: PostgreSQL / MySQL.
• Experience working in production environments and debugging live systems.
• Strong understanding of OOP or Functional Programming, and clean coding standards.
• Knowledge of Docker or other containerization tools.
• Experience with cloud platforms (GCP or AWS).
• Excellent written and verbal communication skills.

Good to Have

• Experience with Golang or Elixir.
• Familiarity with Kubernetes, RabbitMQ, Redis, etc.
• Contributions to open-source projects.
• Previous experience working with AI APIs or machine learning tools.

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 are building an AI-powered chatbot platform and looking for an AI/ML Engineer with strong backend skills as our first technical hire. You will be responsible for developing the core chatbot engine using LLMs, creating backend APIs, and building scalable RAG pipelines.

You should be comfortable working independently, shipping fast, and turning ideas into real product features. This role is ideal for someone who loves building with modern AI tools and wants to be part of a fast-growing product from day one.

Responsibilities

• Build the core AI chatbot engine using LLMs (OpenAI, Claude, Gemini, Llama etc.)

• Develop backend services and APIs using Python (FastAPI/Flask)

• Create RAG pipelines using vector databases (Pinecone, FAISS, Chroma)

• Implement embeddings, prompt flows, and conversation logic

• Integrate chatbot with web apps, WhatsApp, CRMs and 3rd-party APIs

• Ensure system reliability, performance, and scalability

• Work directly with the founder in shaping the product and roadmap

Requirements

• Strong experience with LLMs & Generative AI

• Excellent Python skills with FastAPI/Flask

• Hands-on experience with LangChain or RAG architectures

• Vector database experience (Pinecone/FAISS/Chroma)

• Strong understanding of REST APIs and backend development

• Ability to work independently, experiment fast, and deliver clean code

Nice to Have

• Experience with cloud (AWS/GCP)

• Node.js knowledge

• LangGraph, LlamaIndex

• MLOps or deployment experience

Job description

• Participate the development process;
• Cooperate with QA team;
• Recognize opportunities to improve code efficiency;
• Perform code peer-to-peer reviews;
• Contribute to software architecture planning;
• Maintain code and documentation integrity and organization;
• Help project owner in estimating new features;
• Keep up with emerging trends and technologies;
• Accurately match UI/UX design;
• Participate in various team-buildings and non-development activities (Risks identification, Threats Modeling, etc.)
• Build reusable components.

Requirements:

• 4+ years of commercial experience;
• Strong knowledge of JavaScript (ES5, ES6+), HTML5, CSS3;
• Good understanding of CSS Preprocessors, such as LESS and Sass;
• Experience with React/Redux is a must;
• Experience with TypeScript;
• Upper-Intermediate English;
• Strong knowledge in Node.js (Express);
• Experience working in an Agile environment (Scrum or Kanban);
• Experience with build tools, code coverage, and testing frameworks Webpack, jest etc.;
• Experience with SQL and NoSQL databases PostgreSQL, MongoDB;
• Strong Knowledge with Rest API;
• Proficient understanding of code versioning tools such as Git;
• Experience with Redis, ElasticSearch.

Nice to have:

• Experience with CI/CD;
• Experience with serverless, FaaS and PaaS (AWS Lambda);
• Understanding of SDLC and ISMS.

 Strong experience in front-end design and development minimum 3+ Year to implement responsive, robust/secure, user-friendly/functional, network -sensitive web applications.  Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.  Experience with modern frameworks such as Nodejs, AngularJS Express  Experience in building API and WebSockets for client-server communication with security considerations.  Experience with server-side.  Experience with web services API integration (Rest, JSON, XML).  Ability to understand requirements and map to technical implementation.  Strong knowledge of best practices and modern web design trends is necessary.  Excel at rapid prototyping and at writing good code.  Experience with modern version control.  (GIT or BitBucket).  Experience with testing/debugging in multiple platforms.  Experience with HTML CSS frameworks such as bootstrap.  Understanding of general user experience and UI design principles.  Agile methodologies.  Self-motivated, thinking up and executing own ideas. 

Desired Candidate Profile Below are the qualifications and skills that are expedcte of a full-stack developer:

 Bachelor’s degree in computer science, engineering, or a related technical field  Excellent knowledge of front-end web programming languages, such as HTML, CSS, JavaScript, and AngularJS, with ability to render server-side and client-side content  A working knowledge of shopify app development with technologies, Node, Javascript, React, HTML, CSS3, AWS etc and MongoDB or relevant databases.  Familiarity with common programming design patterns and best practices  Experience with common web development tools and services, such as version control software, package managers, and CI/CD pipelines  Excellent written and verbal communication skills  Expert in JavaScript, DOM, CSS3 and HTML

Role Description

The role is of a Full-stack Engineer who is motivated to actively contribute to the design and development of new product features and enhancements. The role is expected to contribute and support in delivering technical solutions for various problem.

Responsibilities

Hands-on experience to implement solutions using JavaScript(React JS & Node JS)

Develop web/mobile applications using HTML, CSS, JavaScript, Type

Script, React,

In-depth knowledge in JavaScript including ES6+ and Typescript

Experience developing REST and GraphQL APIs with NodeJS and integrations with third-party solutions

Experience in React Native, Android or iOS Native is added advantage.

Working knowledge of SQL and NoSQL database technologies

Experience with TDD and writing robust Unit Test cases.

Exposure to CICD tools, including Git, Maven, Jenkins, Azure

DevOps, App Store deployments

Hands-on development to prototype technical solutions.

Knowledge of any cloud platform solutions (Azure, GCP)

Aware of Agile (Scrum) methodologies

Willing to adapt and learn new/emerging technologies.

Good communication and interpersonal skills

Qualifications

BCA/ MCA / B.Tech. / B.E. / M.Tech. / M.S. in Computer Science

2 - 6 years of experience in development within product-based companies or R&D divisions.

Knowledge in Java, Object-Oriented Programming, Design Patterns, Data structures and algorithms

Our Ideal Candidate

You have a deep interest and passion for technology. You love owning new responsibilities and enjoy working with people who will keep challenging you at every stage. You have strong problem-solving, analytic, decision-making and excellent communication with interpersonal skills. You are self-driven and motivated with entrepreneurial passion and desire to work in a fast -paced, results - driven agile environment with varied responsibilities. You have a passion to mentor and drive technical associates to deliver quality products in an agile environment. You have a flair to setup new process and bring in an innovative mindset to drive the team.

About Company

“Bottom Funnel Inc. is an Equal Opportunity Employer – By Choice. We believe we are best equipped to help our associates, customers and the communities we serve live better when we really know them. That means understanding, respecting and valuing diversity unique styles, experiences, identities, ideas and opinions – while being inclusive of all people.”

Bottom Funnel provides the system and framework that modern marketers need to generate clients from scratch.BOTTOM FUNNEL is a 360° digital branding and marketing agency that provides a wide spectrum of internet marketing services to enhance the online presence of all kinds of businesses.

We offer global solutions of digital marketing and all IT trending technology solutions, communication through classifieds, web portals, social media networks, advertising channels, and search engines. Our digital experts and business consultants help clients by providing only the best digital marketing strategy to develop through innovation and creativity.

A network of the world's best developers - full-time, long-term remote software jobs with better compensation and career growth.  We enable our clients to accelerate their Cloud Offering, and Capitalize on Cloud.  We have our own IOT/AI platform and we provide professional services on that platform to build custom clouds for their IOT devices.  We also build mobile apps, run 24x7 devops/site reliability engineering for our clients.

You will be working on AI/IOT cloud and responsible for architecture and hands on coding. 
We need someone who can engage in conversations about technical architecture with internal teams and external customers. Write well designed, testable, efficient code by using the best software.

We are looking for a Senior full-stack preferred with a demonstrated track

record of developing and maintaining production services, innovative thinking, and technical

excellence. As a senior engineer, you will be responsible for the end-to-end ownership of

systems, from conception to launch and maintenance. You should have a solid understanding of

software development lifecycle and software design principles.

.

This person MUST have:

• BE Computer Science, MCA or equivalent
• Cloud app development experience
• Strong Django and ReactJS experience
• Advanced knowledge of Python and relational databases
• Understanding of APIs, pagination, searching, sorting 
• Experience with building, modifying and extending API endpoints (REST or

GraphQL) for data retrieval and persistence.

• Creating high performance UI etc.
• Experience with SQL and NOSQL databases

• Experience with the full software development life cycle, including requirements

collection, design, implementation, testing, and operational support.

• Experience with scrum or other agile software development methodology.
• Excellent verbal and written communication, teamwork, decision making and

influencing skills.

Experience:

• Min 3 year experience
• Startup experience is a must. 

Location

• Remotely, anywhere in India

Timings:

• 40 hours a week but with 4 hours a day overlapping with client timezone. 
  Typically clients are in California PST Timezone.

Position:

• Full time/Direct
• We have great benefits such as PF, medical insurance, 12 annual company holidays, 12 PTO leaves per year, annual increments, Diwali bonus, spot bonuses and other incentives etc.
• We dont believe in locking in people with large notice periods.  You will stay here because you love the company.  We have only a 15 days notice period.

• You will hold the beacon for development and user experience at a company while helping us scale from 3 million users to 50 million users
• Build performance and effective new features by participating in the overall application lifecycle
• Build modular, reusable, performant, and optimal features both in frontend and backend
• Code, debug, troubleshoot, deliver
• Help maintain and improve existing data structures while planning and implementing new model data structures for scalability
• Continuously improve stability and performance of company’s tech platform
• Be the user’s voice and help make product decisions
• Exhibits knowledge and behavior to adopt Information Security and Privacy practices at their work.

• 1 - 4 years experience as a Full-Stack Developer
• In-depth understanding of the entire web development process (design, development, and deployment)
• Proficiency with Nodejs, MongoDB, AWS.
• Proficiency with front-end languages (e.g. HTML, JavaScript, and CSS)
• Team Building & Leadership
• Want to interact with all levels of the company including senior leaders and cross-functional teams
• Love problem solving and thrive on handling multiple projects and tasks
• Foster strong professional relationships with the full organization
• Sense of ownership and pride in your performance and its impact on the company’s success