Back End Developer - Senior

Job Title: Senior Python Developer – Backend Engineering

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About Darwix AI

Darwix AI is building India’s most advanced GenAI-powered platform for enterprise sales teams. We combine speech recognition, LLMs, vector databases, real-time analytics, and multilingual intelligence to power customer conversations across India, the Middle East, and Southeast Asia.

speech-to-text pipelines

Backed by top-tier VCs, AI advisors, and enterprise clients, this is a chance to build something foundational.

Role Overview

Senior Python Developer

This role is for builders. You’ll work closely with product, AI, and infra teams, write production-grade Python code, lead critical decisions on architecture, and help shape engineering best practices.

Key Responsibilities

Backend API Development

• Design and implement scalable, secure RESTful APIs using

  FastAPI

  ,

  Flask

  , or

  Django REST Framework

• Architect modular services and microservices to support AI, transcription, real-time analytics, and reporting
• Optimize API performance with proper indexing, pagination, caching, and load management strategies
• Integrate with frontend systems, mobile clients, and third-party systems through clean, well-documented endpoints

AI Integrations & Inference Orchestration

• Work closely with AI engineers to integrate GenAI/LLM APIs (OpenAI, Llama, Gemini), transcription models (Whisper, Deepgram), and retrieval-augmented generation (RAG) workflows
• Build services to manage prompt templates, chaining logic, and LangChain flows
• Deploy and manage vector database integrations (e.g.,

  FAISS

  ,

  Pinecone

  ,

  Weaviate

  ) for real-time search and recommendation pipelines

Database Design & Optimization

• Model and maintain relational databases using

  MySQL

  or

  PostgreSQL

  ; experience with

  MongoDB

  is a plus
• Optimize SQL queries, schema design, and indexes to support low-latency data access
• Set up background jobs for session archiving, transcript cleanup, and audio-data binding

System Architecture & Deployment

• Own backend deployments using

  GitHub Actions

  ,

  Docker

  , and

  AWS EC2

• Ensure high availability of services through containerization, horizontal scaling, and health monitoring
• Manage staging and production environments, including DB backups, server health checks, and rollback systems

Security, Auth & Access Control

• Implement robust

  authentication

  (JWT, OAuth),

  rate limiting

  , and

  input validation

• Build role-based access controls (RBAC) and audit logging into backend workflows
• Maintain compliance-ready architecture for enterprise clients (data encryption, PII masking)

Code Quality, Documentation & Collaboration

• Write clean, modular, extensible Python code with meaningful comments and documentation
• Build test coverage (unit, integration) using

  PyTest

  ,

  unittest

  , or

  Postman/Newman

• Participate in pull requests, code reviews, sprint planning, and retrospectives with the engineering team

Required Skills & QualificationsTechnical Expertise

• 3–8 years

  of experience in backend development with

  Python, PHP.

• Strong experience with

  FastAPI

  ,

  Flask

  , or

  Django

  (at least one in production-scale systems)
• Deep understanding of

  RESTful APIs

  , microservice architecture, and asynchronous Python patterns
• Strong hands-on with

  MySQL

  (joins, views, stored procedures); bonus if familiar with

  MongoDB

  ,

  Redis

  , or

  Elasticsearch

• Experience with

  containerized deployment

  using

  Docker

  and

  cloud platforms

  like

  AWS

  or

  GCP

• Familiarity with

  Git

  ,

  GitHub

  ,

  CI/CD pipelines

  , and Linux-based server environments

Plus Points

• Experience working on

  audio processing

  ,

  speech-to-text (STT)

  pipelines, or

  RAG

  architectures
• Hands-on with

  vector databases

  or

  LangChain

  ,

  LangGraph

• Exposure to real-time systems, WebSockets, and stream processing
• Basic understanding of

  frontend integration workflows

  (e.g., with HTML/CSS/JS interfaces)