3 days ago
Delhi, IndiaMid Level / Senior
Responsibilities
- Own the end-to-end latency budget across STT finalization, LLM prefill and generation, and TTS time-to-first-byte, with a sub-one-second response target.
- Diagnose and fix cross-cutting performance bottlenecks involving prompt size, cache-hit rate, network payload, throughput, and pipeline contention.
- Evaluate and integrate STT, LLM, and TTS providers, including in-region India options, and build a model-agnostic provider abstraction layer.
- Implement turn detection, interruption and barge-in handling, filler audio, and retry logic for natural real-time conversations.
- Instrument and trace the full call lifecycle so latency regressions can be diagnosed from production data.
- Make build-versus-buy decisions for pipeline components as the product scales.
- Safeguard sensitive company data and report suspected security incidents according to ISMS policies and procedures.
Requirements
- Hands-on production experience optimizing a cascaded voice pipeline or voice harness combining STT, LLM orchestration, and TTS in a live conversational system.
- Ability to explain latency sources and accuracy-versus-speed trade-offs across each pipeline stage, including what failed under load.
- 3–5 years of experience building and operating production systems at scale, including on-call or direct system ownership.
- Strong systems fundamentals in concurrency, network I/O, and profiling, with a measurement-driven approach to optimization.
- Comfort working with ambiguous problems and real production data rather than fully specified requirements.
- Direct, low-ego communication and willingness to challenge decisions with data.
- Experience with hosted conversational APIs alone, such as Twilio Voice or managed voicebot platforms, without pipeline-internal work, does not meet the requirement.
- Experience with WebRTC, telephony infrastructure such as SIP/PSTN, or real-time audio streaming is a strong plus.
- Familiarity with prompt caching mechanics and context-length effects on prefill cost is a strong plus.
- Experience in a founding or very early-stage pre-seed to seed environment is a strong plus.
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About ixigo
Ixigo (Le Travenues Technology Limited) builds consumer travel apps for India that let users search, plan, and book trains, flights, buses, hotels, and cabs. Revenue comes from travel bookings and related services across its ixigo, ConfirmTkt, and AbhiBus brands, which use AI-based trip planning and utilities. Founded in 2007 and headquartered in Gurgaon, it is publicly listed in India (NSE) and targets the mass-market, multi-modal travel segment.