Responsibilities:

API & Service Design:

• 
  Define and implement RESTful APIs with strong data contracts, versioning, pagination, and error handling.
• 
  Apply security best practices including OAuth2, JWT, access control, and input validation.
• 
  Collaborate with frontend engineers on API contracts, mock servers, and integration patterns.

AI Feature Development:

• 
  Research, prototype, and integrate AI/ML models and third-party services (OpenAI API, LLMs, embeddings, RAG, agentic systems).
• 
  Implement semantic search, vector stores, retrieval pipelines, and multi-agent workflows using LangChain, LangGraph, LlamaIndex, and Weaviate.
• 
  Optimize inference latency, cost, and reliability of AI services.

Testing, Reliability & Quality:

• 
  Write and maintain unit and integration tests for business logic and CRUD operations.
• 
  Conduct root cause analysis and implement long-term fixes for production issues.
• 
  Apply TDD and structured debugging practices.

Performance & Observability:

• 
  Optimize API response times, database queries, and AI pipelines.
• 
  Implement logging, metrics, tracing, and alerts to ensure system observability.

Documentation & Handoff:

• 
  Maintain OpenAPI/Swagger documentation, Postman collections, and internal service guides.
• 
  Ensure frontend and QA teams have everything needed for smooth integration.

DevOps & Platform Collaboration:

• 
  Work with DevOps on containerization, orchestration, and CI/CD (Docker, Kubernetes, pipelines).
• 
  Support cloud deployments across Azure, AWS, and GCP.

Cross-Functional Leadership:

• 
  Participate in retrospectives, propose improvements, and help evolve tooling, architecture, and processes.
• 
  Mentor backend engineers when needed and share best practices.

Requirements

Languages & Frameworks:

• 
  Python (FastAPI, Django, Flask)
• 
  TypeScript / JavaScript (Node.js, Express, Nest.js)

Cloud:

• 
  Azure (Functions, App Service, Cosmos DB)
• 
  AWS (Lambda, S3, RDS)
• 
  GCP (Cloud Run, Firestore)

AI / Data:

• 
  LLMs, RAG, embeddings, vector databases
• 
  LangChain, LangGraph, LlamaIndex, Weaviate

Architecture & Practices:

• 
  Microservices, distributed systems
• 
  DDD, MVC, Pub/Sub, middleware
• 
  TDD, clean code, structured testing

DevOps:

• 
  Docker, CI/CD, Git, observability tooling

Benefits

• 
  Market Competitive salary
• 
  Transportation facility for the female staff
• 
  Monetary benefits include Eid Bonuses, Performance Bonuses, EOBI Pension plan, Paid leave compensation.
• 
  Medical benefits: Family healthcare Including maternity, Family OPD reimbursable, Maternal/Paternal leaves.
• 
  In-house recreational facilities: Outdoor sports area, Billiards & Foosball table, Xbox & Media Room, Gym facility.

• 
  Shift: Night
• 
  Timings: 10:00 pm to 7:00 am
• 
  Location:
  PECHS Block 06, Shahrah e Faisal, Karachi.
• 
  Days:
  Monday to Friday
• 
  Employment Type:
  Full-time