About Bjak

Bjak is a self-funded AI group, operating in full stealth. We’re building a new global consumer AI application focused on an important but underexplored use case.

Job Summary

You will shape the core technical direction of A1 – model selection, training strategy, infrastructure, and long-term architecture. This is a founding technical role: your decisions will define our model stack, our data strategy, and our product capabilities for years ahead.

You won’t just fine-tune models – you’ll design systems: training pipelines, evaluation frameworks, inference stacks, and scalable deployment architectures. You will have full autonomy to experiment with frontier models (LLaMA, Mistral, Qwen, Claude-compatible architectures) and build new approaches where existing ones fall short.

Why This Role Matters

You are creating the intelligence layer of A1’s first product, defining how it understands, reasons, and interacts with users.
Your decisions shape our entire technical foundation — model architectures, training pipelines, inference systems, and long-term scalability.
You will push beyond typical chatbot use cases, working on a problem space that requires original thinking, experimentation, and contrarian insight.
You influence not just how the product works, but what it becomes, helping steer the direction of our earliest use cases.
You are joining as a founding builder, setting engineering standards, contributing to culture, and helping create one of the most meaningful AI applications of this wave.

What You’ll Do

Build end-to-end training pipelines: data → training → eval → inference
Design new model architectures or adapt open-source frontier models
Fine-tune models using state-of-the-art methods (LoRA/QLoRA, SFT, DPO, distillation)
Architect scalable inference systems using vLLM / TensorRT-LLM / DeepSpeed
Build data systems for high-quality synthetic and real-world training data
Develop alignment, safety, and guardrail strategies
Design evaluation frameworks across performance, robustness, safety, and bias
Own deployment: GPU optimization, latency reduction, scaling policies

To apply for this job please visit jobs.ashbyhq.com.