Applied Scientist, Amazon Alexa International Tech (LLMs, ASR and TTS), Bengaluru

Job Description

Amazon’s Alexa International team is hiring an applied scientist in Bengaluru to build technology with large language models and speech models: speech recognition (ASR), text-to-speech (TTS) and speech-to-speech. The work focuses on multilingual AI for Alexa+ across countries and languages, including post-training LLMs with SFT, DPO and reinforcement learning (RLHF and RLAIF) for local markets. A bachelor’s with two years of relevant experience qualifies.

At a glance

• Role: Applied Scientist, Alexa International Tech
• Posted: 3 August 2026
• Focus: Multilingual LLMs, ASR, TTS, speech-to-speech, evaluation
• Location: Bengaluru, Karnataka, India
• Job ID: 10490052
• Apply: open until filled (re-checked 13 October 2026)

About the Alexa International role

• Develop algorithms and models that advance multilingual LLM applications
• Train and fine-tune ASR, TTS and speech-to-speech models
• Post-train LLMs with SFT, DPO, RLHF and RLAIF for specific locations and languages
• Build online and offline evaluation metrics for multimodal assistants
• Analyse customer behaviour and experience from large-scale data

What Amazon is looking for

• Programming in Java, C++, Python or a related language
• A master’s in CS, CE, ML or a related field, or a bachelor’s with at least 2 years of relevant research or industry experience
• Foundational knowledge of LLM architectures, training, evaluation and post-training (SFT, DPO, RLHF, RLAIF)
• Knowledge of standard speech and machine learning techniques

Nice to have

• Publications at top peer-reviewed venues
• Building speech recognition, machine translation or NLP systems
• Professional software development

Pay and location

Amazon’s posting does not state a salary; pay is discussed during the hiring process. The role is based in Bengaluru, India.

How to apply

Apply through the official Amazon job posting. Amazon’s posting does not give a closing date, so the role is open until filled; ResearchJobs.in will re-check this listing on 13 October 2026. Amazon lists the minimum and preferred qualifications on the posting; read both before applying. Check the posting for location and work-authorisation details before you apply.

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