Top 3 Model Tuning LoRA Model Tuning IPO Jobs

Senior AI Researcher
Assail, Inc. —Boston, MA
- Remote
- APIs
- Senior level
- Health insurance
- Dental insurance
Quick Apply
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- $185,000 - $250,000 a year
- Full-time
- SQL
- AWS
- APIs
Senior Product Manager - X Stream
Uniphore —Palo Alto, CA
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Senior AI Researcher

Assail, Inc.
Boston, MA

Quick Apply

Job Details

Benefits

Health insurance
Unlimited paid time off
Dental insurance
Parental leave

Qualifications

AI models
Evaluation research
Reinforcement learning
Vulnerability research
Content creation for technical audiences
PyTorch
Conference papers
Design of experiments
Curriculum design
AI platforms (beyond public GPTs)
Scientific research papers
Research project design
Collaborative research
Production systems
Model deployment
Distributed systems
Supervised learning
Developing large-scale AI models
Engineering research
Developing data pipelines
APIs
Model training
Open source contribution
Implementing machine learning algorithms
Benchmarking
Senior level
Technical writing within technology
Translational research
Model evaluation

Full Job Description

Senior AI Researcher

Assail | AI Engineering | Reports to VP of AI Engineering | Remote-friendly, Boston HQ

About Assail

Assail builds autonomous offensive security. Our platform, Ares, finds vulnerabilities in production systems by reasoning about them the way an experienced attacker would — chaining flaws across APIs, web applications, and mobile surfaces to surface the exploits that scanners miss and human testers run out of time to find.

We train our own models. Dagger is our 14B-parameter offensive security model, fine-tuned for vulnerability discovery and exploit reasoning. Javelin is our co-evolutionary self-training architecture, where attacker and defender models train against each other to push capability further than either could reach alone. The research surface is wide open, the domain is consequential, and the work ships into a platform that's actively used against hardened enterprise targets.

The Role

We're hiring our first dedicated AI Researcher to advance the core models powering Ares. You'll work alongside our VP of AI Engineering and a small AI engineering team, with direct collaboration with our CEO — a researcher and practitioner with 26 years of offensive security experience, contributions to the OWASP API Security Top 10, and a permanent exhibit at The Mob Museum.

This is a research role, not an applied ML role. You'll own original research on offensive security agents — how they reason, plan, use tools, and operate autonomously over long horizons. You'll design experiments end-to-end, build the evaluation infrastructure the field doesn't yet have, and translate research wins into capability that ships.

The feedback loop is fast and adversarial. Research that proves out goes into production. Research that doesn't gets killed quickly so the next bet can start.

What You'll Do

Drive original research on offensive security agents — reasoning, planning, tool use, and autonomous long-horizon operation
Advance Dagger's post-training pipeline: supervised fine-tuning, RL from verifier signals, LoRA adaptation, and evaluation against adversarial benchmarks
Extend Javelin's co-evolutionary self-training architecture: curriculum design, self-play dynamics, and reward modeling for security-specific outcomes
Design and execute experiments end-to-end, from hypothesis through writeup
Build internal evaluation harnesses that measure capability rigorously, where no public benchmark exists
Translate research into production handoffs to AI Engineering — model cards, deployment notes, and known failure modes
Contribute to Assail's external research voice through papers, talks, responsible disclosures, and technical writing
Collaborate with engineering teammates on research methodology and experimental design

What We're Looking For

You don't need every item on this list. We care more about depth where you have it than breadth where you don't.

Core experience that matters most:

Original ML research output — published papers, widely cited preprints, significant open-source releases, or shipped research that materially advanced a production system
Hands-on post-training experience with language models at the 7B+ parameter scale, end-to-end ownership of a pipeline including data, training, and evaluation
Direct work with at least one of: RL from verifier or reward signals, preference optimization (DPO/IPO/KTO), or supervised fine-tuning with synthetic data pipelines
Experience with agentic LLM systems — tool use, multi-step reasoning, planning, or long-horizon execution
Ability to design evaluation that measures real capability and avoids contamination or specification gaming
Strong Python and PyTorch, with experience in distributed training at multi-GPU scale
Clear technical writing — research memos, experiment writeups, papers, or equivalent

Helpful but learnable here:

Working knowledge of offensive security fundamentals (we'll teach you the rest if you bring strong ML depth)
Prior work on code-generating or code-reasoning models
Experience with sparse, delayed, or expensive reward signals in RL
Research on robustness, adversarial ML, or red-teaming of language models
Familiarity with long-horizon agent benchmarks (SWE-bench, Cybench, WebArena, or similar)

Things we deliberately don't require:

A PhD. Track record matters more than the credential. If your work demonstrates the capability, the degree is secondary.
A security background. Strong ML researchers can develop security depth here, and we'll support you in doing it.
A specific number of years. Senior is a function of judgment and output, not a count.

What This Role Will Teach You

How to train and post-train capable models in a narrow, high-stakes domain
How to design evaluation that holds up to scrutiny when no benchmark exists yet
How agentic systems behave under adversarial conditions — including failure modes that don't appear in benign settings
The full offensive security stack — API, web, and mobile — at a depth most ML researchers never reach
How to make publication and disclosure decisions for dual-use research
How research moves from hypothesis to production in a small team where the handoff is measured in days

What We Offer

Competitive base salary and meaningful early-stage equity
Comprehensive health and dental coverage
Unlimited paid time off, including parental leave
Conference, publication, and continued learning budget — we want you engaged with the research community
The chance to work on a problem that matters, with people who care about doing it well

Quick Apply

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