Applied AI Engineer

About ActAI

There are over 5 billion users using basic applications today such email, notes, tasks, calendar and theyre not AI-native. Our mission is to build proactive applications for anyone in the world, who are not used to complex prompting. We aim to bring intelligence to conversations, errands, organising and workflows, with minimal to no prompting.
Our first application is an agent-first mobile communication app. We believe building applications that users use daily for communication, coordination and collaboration needs will help integrate AI into their lives. The net effect is to eliminate misinformation, achieve low coordination costs, enable high quality tasks and collaboration at scale with minimal or little prompting.
Role

As an Applied AI Engineer, you will turn model capabilities into real product behavior. You will own problems end-to-end, from shaping model behavior, to building the systems around it, to ensuring it performs reliably in production.
This role sits at the intersection of machine learning, systems, and product, focusing on making AI actually work for users, not just in demos, but in real-world usage.
Focus

Build and ship AI features end-to-end (model → system → user experience)

Design and iterate on prompts, tools, memory, and agent workflows

Turn raw model outputs into structured, reliable, and predictable behaviors

Debug issues across the full stack (model, orchestration, infra, UX)

Optimize for latency, cost, and production reliability

Develop lightweight evaluation frameworks to measure real-world performance

Work closely with product and engineering to translate ambiguous problems into working systems

Tech Stack

Python

PyTorch / JAX

LLMs (OpenAI-style APIs, LLaMA, Qwen, etc.)

Inference / serving (e.g. vLLM)

Vector DB

Ideal Experience

Strong foundation in machine learning and modern neural network architectures.

Hands-on experience with training, fine-tuning, or deploying ML models

Ability to write clean, production-quality code

Comfort working across abstraction layers (model → infra → product)

Strong problem-solving skills in ambiguous, fast-moving environments

Bias toward shipping, iteration, and continuous improvement

Outcomes

ML models in production meet expected accuracy, latency, and reliability targets.

Production issues are identified quickly, debugged effectively, and root causes addressed.

Data pipelines, training loops, and inference systems are robust, reproducible, and maintainable.

Collaborates effectively with engineers, product, and research teams to deliver reliable ML-powered features.

Iterations on models and systems are driven by real-world signals and measurable improvements.

How We Work

The best products today in the world were built by small, world class teams. We make decisions collectively, move at rapid speed, striking a balance between shipping high quality work and learning. Joining our team requires the ability to bring structure, exercise judgment, and execute independently. Our goal is to put in hands of our users a truly magical AI product.
Interview process

If there appears to be a fit, well reach to schedule 3, but no more than 4 interviews.
Applications are evaluated by our technical team members. Interviews will be conducted via virtual meetings and/or onsite.
We value transparency and efficiency, so expect a prompt decision. If youve demonstrated the exceptional skills and mindset were looking for, well extend an offer to join us. This isnt just a job offer; its an invitation to be part of a team thats bringing AI to have practical benefits to billions globally.