Applied AI Engineer - LLM & NLP

Toku Ltd.; Rotterdam; Hybrid; EUR 110,000 - 145,000; Full time

Benefits offered by this job

Training and Development

Discretionary Yearly Bonus & Salary | 

Healthcare Coverage

20 days Paid Annual Leave

Job summary

Toku Ltd. is seeking an Applied AI Engineer to build real-world AI capabilities across NLP, speech-to-text, and LLM-driven features in production. You will work closely with engineering teams to integrate models and deliver practical improvements in live systems.

You will use Python-based AI development (e.g. PyTorch) and AWS tooling to enhance latency, accuracy, and reliability, while contributing to prompt design and model optimisation in a scalable microservices environment.

Qualifications

• Strong hands-on experience with LLMs, NLP, or speech technologies, including training, fine-tuning, and evaluating models in real-world or production contexts
• Practical experience with Python-based AI development (e.g. PyTorch and related ecosystems)
• Hands-on experience reading, evaluating, and applying AI/ML research and translating those insights into production-ready model improvements
• A strong foundation in AI/ML fundamentals, typically supported by an academic background in AI, machine learning, computer science, or a closely related field

Responsibilities

• Train, fine-tune, evaluate, and improve NLP, speech-to-text, and LLM-based models used in production environments
• Work hands-on with chatbots, summarisation, and language understanding features, including retrieval-augmented generation (RAG) and vector-based retrieval systems
• Design and run model evaluations, benchmarking existing approaches and validating improvements before deployment
• Integrate models into existing backend services using Python-based APIs and collaborate with backend engineers
• Ensure models are production-ready, maintainable, and resilient when deployed in live customer-facing systems
• Support investigation and resolution of AI-related production issues in collaboration with engineering and platform teams
• Communicate progress, trade-offs, and technical decisions clearly in planning and delivery discussions

Skills

LLMs

NLP

Speech-to-text

Python

PyTorch

RAG

Vector retrieval

Model deployment

Research

Education

AI/ML/CS degree

Tools

Docker

SageMaker

AWS

Git

MLflow

Job description

At Toku, we create bespoke cloud communications and customer engagement solutions to reimagine customer experiences for enterprises. We provide an end-to-end approach to help businesses overcome the complexity of digital transformation and deliver mission-critical CX through cloud communication solutions. Toku combines local strategic consulting expertise, bespoke technology, regional in-country infrastructure, connectivity, and global reach to serve the diverse needs of enterprises operating at scale. Headquartered in Singapore, Toku supports customers across APAC and beyond, with a growing footprint across global markets.

As an Applied AI Engineer at Toku, you will focus on building, improving, and deploying real-world AI capabilities across speech-to-text, chatbots, and large language model–driven features used in production. This role combines hands‑on model development with applied research, where you will evaluate existing approaches, explore new techniques, and translate research insights into practical improvements in live systems. You will work closely with engineering teams to integrate models into production services while maintaining a strong delivery mindset. You will thrive in this role if you enjoy balancing deep technical execution with curiosity‑driven, applied research that directly shapes product outcomes.

What you will be doing

• Train, fine-tune, evaluate, and improve NLP, speech-to-text, and LLM-based models used in production environments
• Work hands‑on with chatbots, summarisation, and language understanding features, including retrieval‑augmented generation (RAG) and vector-based retrieval systems
• Design and run model evaluations, benchmarking existing approaches and validating improvements before deployment

Applied Research & Experimentation

• Read, assess, and experiment with relevant AI/ML research and emerging techniques, translating promising ideas into practical, production‑ready solutions
• Contribute to prompt design, model optimisation, and iterative experimentation to improve accuracy, latency, and reliability of deployed models

Production Integration & Delivery

• Integrate models into existing backend services using Python‑based APIs, collaborating closely with backend engineers
• Ensure models are production‑ready, maintainable, and resilient when deployed in live customer‑facing systems
• Support investigation and resolution of AI‑related production issues in collaboration with engineering and platform teams
• Work closely with engineering teams to align AI capabilities with product requirements and platform constraints
• Communicate progress, trade‑offs, and technical decisions clearly in planning and delivery discussions

We’d love to hear from you if you have

Core AI & LLM Expertise

• Strong hands‑on experience with LLMs, NLP, or speech technologies, including training, fine‑tuning, and evaluating models in real‑world or production contexts
• Practical experience with Python‑based AI development (e.g. PyTorch and related ecosystems)

Applied Research & Fundamentals

• Hands‑on experience reading, evaluating, and applying AI/ML research (e.g. papers, benchmarks, emerging techniques) and translating those insights into production‑ready model improvements
• A strong foundation in AI/ML fundamentals (e.g. mathematics, machine learning concepts, model behaviour and evaluation), typically supported by an academic background in AI, machine learning, computer science, or a closely related field

Production & Integration Experience

• Experience deploying or supporting AI models in production systems, including exposure to monitoring, iteration, and real‑world failure modes
• Ability to integrate models into existing backend services via Python APIs and work effectively within a microservices‑based environment
• Familiarity with retrieval‑augmented generation (RAG), embeddings, and vector‑based retrieval systems
• Working knowledge of AWS‑based environments and AI tooling (e.g. EC2, SageMaker, MLflow, Docker)

Ways of Working

• A proactive, problem‑solving mindset with the ability to identify opportunities for improvement rather than waiting for direction
• Strong collaboration and communication skills when working with engineers across different disciplines

Location

This is a remote / hybrid role to be based in either The Netherlands (Rotterdam strongly preferred), Singapore or Hong Kong

What would you get?

• Training and Development
• Discretionary Yearly Bonus & Salary Review
• Healthcare Coverage based on location
• 20 days Paid Annual Leave (15 days for Malaysia based roles), plus other leave allowances

Toku has been recognised as a LinkedIn Top Startup and by the Financial Times as one of APAC’s Top 500 High Growth Companies. If you’re looking to be part of a company on a strong growth trajectory while working on meaningful, real‑world challenges, we’d love to hear from you.