Lead Engineer / Engineer, AI R&D (LLM Alignment & Product), Q Team CoE

Home Team Science and Technology Agency (HTX); Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Home Team Science and Technology Agency (HTX) in Singapore seeks Applied AI Engineers to advance sovereign AI via LLMs and LMMs. You will align model behavior, publish models, and collaborate with a product manager and developers across guardrails and safety datasets.

The role involves building with sovereign AI tooling and distributed GPU resources. You will shape model identity and safety, publish model cards, write documentation, and contribute to joint R&D projects with global labs.

Qualifications

• Bachelor's degree in CS/DS/Engineering/Math or related field.
• Ability to explain complex technical concepts to engineers and non-technical users.
• Hands-on experience building with LLMs beyond chatbots.
• Keen to learn and experiment in a fast-paced Applied AI R&D environment.

Responsibilities

• Publish model weights and datasets on platforms like HuggingFace with release clearance.
• Co-create model cards and technical blog posts with the Product Manager for each launch.
• Write best-practice guides and run developer days for engineers and the AI community.
• Define LLM behavior, identity, tone, refusals and honesty in guidelines and training data.
• Build behavior evaluations and track them across model checkpoints.
• Run post-training experiments (SFT, RL) to improve behavior.
• Provide alignment results to inform launch decisions.

Skills

LLMs

Model alignment

Explain concepts

Documentation

Education

Bachelor's degree in CS/DS/Engineering/Math

Tools

HuggingFace

Job description

What the role is:

The Home Team Science and Technology Agency (HTX) is a statutory board under the Ministry of Home Affairs (MHA) which aims to pioneer innovation solutions and develop world class science and technology capabilities to transform and empower the Home Team in delivering safety and security for Singapore. You will join the core team behind the Phoenix LLM – a family of Sovereign AI models trained right here in Singapore. We are a dynamic team of Applied AI Engineers building state-of-the-art sovereign Large Language Models (LLMs) and Large Multimodal Models (LMMs) from the ground up. More about our work: http://go.gov.sg/phoenix-launch and https://arxiv.org/abs/2605.10391 In this role, you will have the unique opportunity to push the frontier of Sovereign AI while collaborating on joint Applied R&D projects with global AI labs. You will have access to large GPU clusters for distributed AI training. In this role, you are the bridge between the core research team and our users - you guide our LLMs on how it behaves and engage with the developers and users who use it. You shape the model's identity and safety behaviour through evaluation and fine-tuning, then publish our models, datasets and code with the documentation that tells developers what the model does well and where its limits are and you work alongside our Technical Product Manager.

What you will be working on:

• Product Releases and developer community:
  • Publish model weights and datasets on platforms like HuggingFace, through our release clearance process
  • Jointly write the model card and technical blog post with the Product Manager for each launch
  • Write best-practice guides and run developer days for the agency's engineers and the wider AI community
• Model alignment and behaviour:
  • Define how our LLMs should behave, including its identity, tone, refusals and honesty, and turn that into written guidelines and training data
  • Build behaviour and safety evaluations, and track them across model checkpoints
  • Run post-training experiments (SFT, RL, etc) to correct behaviour
  • Provide alignment results to advise launch decisions

What we are looking for:

• Minimally Bachelor's degree in Computer Science, Data Science, Engineering, Mathematics or a related field, or equivalent experience
• Able to explain complex technical concepts (for example the capabilities and limitations of the models) to both engineers and non-technical users
• Hands-on experience building with LLMs (beyond just using a commercial chatbot)
• Keen to learn and experiment in a fast-paced Applied AI R&D environment

Good to have:

• Clear technical writing, shown in a portfolio, for example: research papers, technical linkedin/blog posts, model cards, documentation, a thesis or talks
• Models or datasets you have published on Hugging Face, or an open source project you contributed to
• Experience with designing benchmarks or evaluations for LLMs
• Talks, workshops or published papers (main, workshop and industry tracks all count)

**** All new hires are appointed on a two-year contract in the first instance and will be assessed and considered for permanent tenure over time, based on performance. As part of the shortlisting process for this role, you may be required to complete a medical declaration and/or undergo further assessment. All applicants will be updated on the status of their applications within 4 weeks upon closing of the advertisement.

About Home Team Science and Technology Agency (HTX)

HTX is the world's first Science and Technology agency that integrates a diverse range of scientific and engineering capabilities to innovate and deliver transformative and operationally-ready solutions for homeland security. As a statutory board of the Ministry of Home Affairs and integral to the Home Team, HTX works at the forefront of science and technology to empower Singapore's frontline of security. Our shared mission is to amplify, augment and accelerate the Home Team's advantage and secure Singapore as the safest place on planet earth.