Senior Full Stack Developer Superstar

POSLABS Inc.; Delhi; On-site; INR 2,000,000 - 4,000,000; Full time

Job summary

EatOS POS Inc. in India seeks a Senior Full Stack Developer to design, build, and deploy AI-enabled web and mobile applications. You will work across backend and frontend using Node.js, TypeScript, React, and Flutter, and integrate LLMs, RAG, embeddings, and MCP for advanced features.

Collaborate with cross-functional teams, implement REST and WebSocket real-time systems, optimize MongoDB schemas, and ensure scalable, secure deployments with CI/CD, Docker, and testing frameworks.

Qualifications

• Minimum of 5 years of relevant work experience.
• Strong proficiency in Node.js and TypeScript.
• Advanced experience with React.js (hooks, modern patterns).
• Experience with Flutter for cross-platform development.

Responsibilities

• Architect and implement end-to-end solutions from database to frontend.
• Develop RESTful APIs and WebSocket-based real-time systems.
• Build scalable and high-performance applications.
• Integrate AI/ML features using LLMs, RAG, embeddings, and MCP.

Job description

JOB DESCRIPTION: Senior Full Stack Developer (AI-Integrated Applications).

Who We Are

At eigital, we drive progress by enabling global organisations to stay ahead in an ever-changing technological, societal, and cultural landscape. We are dedicated to reimagining impact and shaping the future with software of tomorrow.

What We Are Looking For

We are seeking an experienced and highly skilled Full Stack Developer to design, develop, and deploy modern web and mobile applications with integrated AI capabilities. The ideal candidate has strong expertise in both backend and frontend development, with a focus on building scalable, real-time applications powered by AI technologies.

You will work with Node.js, TypeScript, React, and Flutter, while leveraging advanced AI tools such as Large Language Models (LLMs), RAG systems, embeddings, and Model Context Protocol (MCP).

Key Responsibilities

Full-Stack Development:

• Architect and implement end-to-end solutions from database to frontend.
• Develop RESTful APIs and WebSocket-based real-time systems.
• Build scalable and high-performance applications.

Front-End Development

• Design and develop responsive web applications using React.js.
• Implement modern UI/UX patterns and ensure cross-browser compatibility.
• Build or migrate applications using Flutter for web and mobile platforms.

Back-End Development

• Develop robust backend services using Node.js and TypeScript.
• Design scalable API architectures and ensure system reliability.
• Handle real-time communication using WebSockets.

Database Management

• Design and manage MongoDB databases.
• Optimize schema design, indexing, and query performance.
• Implement data modeling strategies for document-based storage.

AI & Machine Learning Integration

• Integrate LLMs (e.g., GPT, Claude) into applications.
• Build and implement RAG (Retrieval-Augmented Generation) systems.
• Work with vector embeddings and semantic search.
• Apply prompt engineering techniques and AI tooling.

Real-Time & Advanced Features

• Implement real-time features using WebSockets.
• Ensure efficient and secure data communication.

Development Tools & Practices

• Use Git for version control and collaboration.
• Implement CI/CD pipelines and deployment workflows.
• Utilize Docker and containerization practices.
• Apply testing frameworks (Jest, Mocha, Flutter test).

Collaboration And Communication

• Work closely with cross-functional teams to deliver solutions.
• Participate in code reviews and maintain code quality standards.

Continuous Improvement

• Stay updated with emerging AI and development technologies.
• Continuously optimize performance, scalability, and efficiency.

Key Requirements & Skills

• Minimum of 5 years of relevant work experience.
• Strong proficiency in Node.js and TypeScript.
• Advanced experience with React.js (hooks, modern patterns).
• Experience with Flutter for cross-platform development.
• Solid experience with MongoDB (schema design, optimization).
• Strong understanding of WebSockets and real-time systems.
• Hands-on experience with RESTful API development.
• Experience with AI/ML integrations in production environments.
• Knowledge of RAG systems, embeddings, and semantic search.
• Familiarity with MCP (Model Context Protocol).
• Experience with Git, CI/CD, and Docker.
• Strong problem-solving skills and attention to detail.
• Excellent communication and teamwork skills.

Preferred Qualifications

• Experience with cloud platforms (AWS, GCP, or Azure).
• Knowledge of microservices architecture and API gateways.
• Experience with GraphQL.
• Familiarity with Redis or caching systems.
• Understanding of OAuth and JWT authentication.
• Experience with WebRTC for advanced real-time features.
• Knowledge of Python for AI/ML integration.
• Experience with vector databases (Pinecone, Weaviate, Qdrant).
• Familiarity with monitoring and logging tools.

Key Projects & Deliverables

• Build full backend infrastructure using Node.js and MongoDB.
• Develop modern React-based web applications.
• Create or migrate Flutter applications for web and mobile.
• Implement AI-powered features (chatbots, search, automation).
• Build RAG pipelines with embedding and retrieval systems.
• Integrate MCP servers and AI workflows.
• Ensure application security, scalability, and performance.

Soft Skills & Attributes

• Strong analytical and problem-solving skills.
• Ability to manage multiple priorities independently.
• Passion for AI and emerging technologies.
• High attention to detail and code quality.
• Collaborative mindset with mentoring ability.

What You’ll Work With

• Node.js & TypeScript
• React.js
• Flutter (Web & Mobile)
• MongoDB
• WebSockets
• LLM providers (OpenAI, Anthropic, etc.)
• RAG frameworks & vector databases
• MCP tools and integrations

How We Work

• Flexible or full-time work schedule.
• This role is intended for highly skilled developers only. Please do not apply if you do not meet these criteria.
• Usage of time doctor (time and task tracking software) is mandatory for all team members; please ensure you're comfortable with this before applying.

About

At eigital, we drive progress by enabling global organisations to stay ahead in an ever-changing technological, societal, and cultural landscape. We are dedicated to reimagining impact and shaping the future with software of tomorrow.. Leveraging AI, software development, and data-driven insights, we enhance customer experiences, modernise operational frameworks, and unlock untapped value. From initial concept to full execution, we help set ambitious yet attainable goals for digital transformation, equipping our partners with the speed and agility needed to thrive.

About EatOS POS Inc.

eatOS was born in 2017 to help restaurants manage their business and serve customers better. Since inception, it has grown to offer cross segment of products and services that allow restaurants across the country to manage and operate their businesses more efficiently. At the same time, enabling restaurants to leverage technology to save on costs and connect with guests in a more authentic and engaging way.