Lead Research Engineer - Voice & Language AI

Job detailsApplication formGreyLabs AI is building the voice operating system for India’s BFSI. Our Agentic Voice AI platform helps banks, insurers, NBFCs, and fintechs automate and humanise millions of customer conversations - across sales, collections, customer service, and compliance - in multiple Indian languages.In under two years, we’ve scaled to 50+ enterprise clients, including RBL Bank, AU Small Finance Bank, IDFC FIRST Bank, SBI Life, ICICI Prudential Life, and Motilal Oswal - processing hundreds of millions of conversations. We raised ₹85 Crores in Series A funding led by Elevation Capital with Z47, and were recognised for “Best Use of AI in Fintech” at IFTA 2025.The RoleThis is a pure Individual Contributor role within our R&D function. You will work across STT, LLM, and TTS systems - with a clear mandate to close the distance between research and production. That means working directly with backend engineers and systems to ensure your work integrates into live systems cleanly, quickly, and with the observability it needs to be trusted at enterprise scale.What You’ll DoLead optimisation work on STT/ASR systems - improving transcription accuracy and reducing latency for domain-specific, multilingual voice data across Indian languages and financial services contextsEvaluate, fine-tune, and deploy LLMs for BFSI-specific tasks: information extraction, classification, summarisation, and compliance signal detectionBuild and benchmark TTS capabilities against real product requirements - model quality, naturalness, latency, and integration fit with downstream systemsDesign and maintain scalable prompt engineering and RAG infrastructure for production LLM featuresWork closely with backend engineers and systems (hands-on) to take research outputs from working prototype to deployed, observable production featureEstablish evaluation frameworks that measure what actually matters - reproducible, deliberate, and tied to real product outcomesTrack developments in open-source LLMs and ASR frameworks and make reasoned, evidence-backed decisions on adoptionIdentify high-leverage research problems and contribute to where the team invests nextWhat We’re Looking For8+ years in software engineering with significant depth in ML/NLP systemsHands-on experience with LLMs - from prompt design through fine-tuning, evaluation, and deploymentExposure to ASR/STT technologies: Whisper, Kaldi, DeepSpeech, or commercial equivalentsProficiency with ML tooling: Hugging Face, LangChain, or equivalent frameworksCloud experience (AWS or GCP) for model training, deployment, and monitoringAble to make modelling and architecture decisions with incomplete information and articulate the reasoning clearlyWrites clean, production-ready Python that backend engineers can integrate and maintainUnderstands how ML components fit into larger backend architecturesStrong SignalsHas closed the gap between “this works in a notebook” and “this is running reliably in production” - more than once, and with an understanding of why that gap existsHas worked directly with backend engineers to ship an ML-powered feature and can speak to what that collaboration required technicallyHolds a high bar on evaluation - does not trust a result they cannot reproduce or a metric they did not choose deliberatelyHas made a deliberate build-vs-adopt decision on a core ML component, can articulate the trade-offs, and has lived with the outcomeCan engage product and business stakeholders on technical constraints without losing precisionWhy GreyLabs AIA hard problem in a large market. Building accurate, low-latency, multilingual Voice AI for regulated financial institutions - across diverse Indian languages and under RBI and IRDAI compliance requirements - is technically complex and commercially consequential.Real scale, real research problems. The STT, LLM, and TTS challenges here come from actual production load, real customer data, and the constraints of enterprise deployment. They are not synthetic.Research that ships. At our current stage, the distance between a working experiment and a live product feature is short. Your work will reach millions of conversations.Strong backing, proven team. Elevation Capital and Z47 are long-term partners invested in our vision. Our founders built and exited Cogno AI - they understand what it takes to build AI companies that earn enterprise trust.We’re committed to creating a fair, respectful, and inclusive workplace. From hiring to growth opportunities, our decisions are based on merit, skills, and potential, never on gender, identity, background, or any other personal characteristic. Talent has no labels here, and everyone is welcome to grow and thrive with us.Apply for this positionAutofill from resumeSave time by uploading your resume. 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