Senior Backend Engineer

Job Title: Senior Backend Engineer (End-to-End Product Owner – IC)

Location: Hyderabad / Hybrid

Experience: 8+ years

Employment Type: Full Time

Note: Attending an in-person interview at our Hyderabad location is mandatory for this role.

Job Summary:

We are seeking a highly technical Senior Backend Engineer who will take full ownership of our call validation platform.

Naturally curious and highly tech-enthusiastic enjoys exploring new technologies, experimenting with AI systems, and continuously improving technical depth.

This is a deeply hands-on individual contributor role with responsibility across architecture, implementation, deployment and reliability.

Our platform programmatically validates calls by initiating automated calls through a voice gateway, converting audio to text and applying LLM.

You will own the entire backend system consisting of:

• API Service (NestJS)
• Caller Service (NestJS)
• RabbitMQ-based orchestration
• Redis caching layer
• MongoDB persistence
• AI + STT validation pipeline

This role is for someone who wants full system ownership — not just feature delivery.

Core Responsibilities

System Architecture & Backend Engineering

• Own architecture and implementation of distributed NestJS microservices.
• Design async workflows using RabbitMQ for call orchestration and job processing.
• Implement Redis-based caching and state coordination.
• Design MongoDB schemas, indexing strategies, and performance optimizations.
• Build resilient retry, idempotency, and failure-handling mechanisms.
• Optimize throughput and latency of IVR call pipelines.

Voice + AI Validation Pipeline

• Integrate with voice gateways to initiate calls.
• Build Speech-to-Text ingestion pipelines.
• Design LLM-based classification workflows to validate calls.
• Develop and iterate prompt engineering strategies.
• Implement evaluation logic to measure AI accuracy and continuously improve prompts.
• Handle edge cases such as partial transcripts, ambiguous responses, and call failures.

Product Ownership

• Translate ambiguous product requirements into technical designs.
• Make architectural decisions independently.
• Define technical roadmap and system evolution.
• Balance delivery speed with system correctness.
• Operate with a you build it, you run it mindset.

Technical Stack

• Backend: NestJS / TypeScript
• Database: MongoDB
• Queue: RabbitMQ
• Cache: Redis
• Infrastructure: Kubernetes
• CI/CD: GitHub Actions
• AI: Speech-to-Text + LLMs
• Domain: Telephony/ VOIP
• Architecture: Event-driven microservices

Required Experience

• 8+ years building backend or distributed systems.
• Strong NestJS / Node.js / TypeScript experience.
• Proven experience with microservices and async message-based architectures.
• Hands-on RabbitMQ (or Kafka / SQS equivalents).
• Redis for caching or workflow coordination.
• Strong MongoDB data modeling and optimization.
• Production Kubernetes experience.
• CI/CD pipeline ownership.
• Practical experience integrating STT systems.
• Real-world LLM usage and prompt engineering.
• Experience building AI-assisted classification or automation pipelines.
• Comfortable owning production systems end-to-end.