AI Backend​/Full-Stack Developer

Location: Remote;
Employment Type: Full-time / Contract;
Experience: 3+ Years;
Tech Stack: Node.js, Type Script, LLMs, Qwen, PostgreSQL, Redis, React, Docker

We are looking for an experienced AI Backend / Full-Stack Developer to build and scale a production-ready, multilingual AI assistant capable of understanding English, Hindi, and Hinglish and translating natural-language requests into secure application workflows.

The platform will support account management, wallet operations, payment workflows, transaction history, real-time information retrieval, application navigation, and customer support.

An initial Node.js implementation already includes intent classification, structured entity extraction, local Qwen3 inference, a testing interface, and automated tests.

You will extend this foundation into a reliable, scalable platform with authenticated API integrations, conversation management, secure transaction handling, monitoring, and production deployment.

This is a hands-on engineering role focused on developing, integrating, testing, and shipping production software.

• Design, develop, and maintain scalable backend services using Node.js and Type Script.
• Integrate self-hosted LLMs using OpenAI-compatible APIs or equivalent interfaces.
• Build multilingual intent recognition and entity extraction for English, Hindi, and Hinglish.
• Implement conversational context, clarification flows, and multi-step interactions.
• Integrate the AI assistant with account, wallet, payment, transaction, and customer support APIs.
• Develop a secure tool/function-calling framework with schema validation and deterministic business logic.
• Implement authentication, authorization, transaction confirmation, and audit logging.
• Handle API failures, retries, timeouts, idempotency, and duplicate requests.
• Build responsive conversational interfaces and internal management dashboards.
• Optimize model inference performance, response latency, and resource utilization.
• Develop automated evaluation pipelines for intent accuracy, entity extraction, and workflow completion.
• Write unit, integration, and end-to-end tests.
• Set up CI/CD pipelines, logging, monitoring, and production deployments.
• Collaborate with product, frontend, and backend teams to define API contracts and deliver features.

• 3+ years of software development experience
  , preferably in backend or full-stack development.
• Strong proficiency in JavaScript, Type Script, and Node.js.
• Experience building and integrating REST APIs.
• Practical experience integrating LLMs into real-world applications.
• Understanding of structured LLM outputs, JSON Schema, function calling, and response validation.
• Experience with authentication, role-based access control, and secure API communication.
• Understanding of transactional workflows, state management, retries, and idempotency.
• Experience with PostgreSQL or similar relational databases.
• Familiarity with Redis for caching and session management.
• Working knowledge of Docker, Git, CI/CD, and Linux environments.
• Experience writing automated tests and debugging production applications.
• Ability to develop modular, maintainable, and well-documented code.
• Ability to work with Hindi and Hinglish inputs, including romanized Hindi and common abbreviations.

• Experience with Qwen, Llama, or other open-weight language models
  .
• Familiarity with LM Studio, Ollama, vLLM, or llama.cpp.
• Experience with React or Next.js.
• Experience integrating payment gateways, digital wallets, or financial APIs.
• Knowledge of Web Sockets, Server-Sent Events (SSE), message queues, and asynchronous processing.
• Familiarity with prompt-injection prevention, sensitive-data…