Research Engineers, Post-Training
At a glance
Mid-level AI Research role at Distyl AI. San Francisco · full-time · $150,000–$250,000 base.
aimlroles summary, based on the employer's posting.
What you'll do
- Design post-training workflows and run experiments to improve AI behavior, reliability and usefulness
- Build datasets, evaluation suites, reward models and feedback loops for applied AI systems
- Create tools for experimentation, model comparisons, regression checks and behavior analysis
- Study model outputs, failures, human feedback and production traces to find ways to improve behavior
- Work with researchers, engineers and customer stakeholders to adapt and deploy robust AI systems
What you bring
- Hands-on work with fine-tuning, preference optimization, reinforcement learning or another post-training method
- Strong programming skills for building training and evaluation pipelines and analyzing controlled experiments
- You use evaluations, comparisons or regression tests to measure behavioral changes
- You can weigh research goals against cost, latency, reliability, data and customer needs
Who this fits
This role suits a research-minded engineer who wants to understand and improve AI behavior, then carry successful methods into deployed systems. The job is based in San Francisco and requires at least three office days each week, Tuesday through Thursday.
From the employer
About Distyl AI
Distyl is an applied AI technology company partnering with the world’s most ambitious institutions to rearchitect critical operations for the frontier of AI. Our customers include the largest companies in telecom, healthcare, insurance, manufacturing, consumer goods, and global social organizations.
We research and deploy technologies that power AI-native operations — both for our partners and for Distyl itself. Our work spans research into self-constructing systems, the development of the most reliable execution of AI systems, and products that transform mission-critical workflows. As a result, Distyl's technologies affect some of the world's largest operations — from hundreds of millions of consumer interactions to tens of millions of supply chain transactions and millions of patient journeys.
Distyl is backed by leading investors including Lightspeed Venture Partners, Khosla Ventures, Coatue, DST Global, and the board-members of 20+ F500s.
What We Are Looking For
At Distyl, Research Engineers build the bridge between frontier AI research and production systems that deliver real business value. This role is for engineers who are excited to investigate how AI systems should be designed, rapidly prototype new ideas, and turn promising concepts into reliable systems that work inside real customer environments.
Research Engineers operate at the intersection of applied research, systems engineering, and customer-facing deployment. They design and implement compound AI systems, run experiments to understand system behavior, build evaluation frameworks, and collaborate closely with AI Researchers, AI Engineers, and customer stakeholders. Their work is not limited to demos or isolated prototypes: they help turn new techniques into robust systems that can be measured, operated, and improved in production.
Key Responsibilities
Design and run post-training workflows that improve the behavior, reliability, and usefulness of AI systems
Develop datasets, preference signals, evaluation suites, reward models, fine-tuning workflows, and feedback loops for applied AI use cases
Investigate how different post-training techniques affect system behavior across enterprise workflows and production constraints
Build infrastructure for experimentation, model comparison, regression testing, and behavior analysis
Partner with AI Researchers to explore new post-training methods and with AI Engineers to apply successful techniques in deployed systems
Analyze model outputs, failure modes, human feedback, and production traces to identify opportunities for behavioral improvement
Create repeatable processes for adapting AI systems to customer domains while preserving robustness, transparency, and maintainability
Communicate clearly with internal teams and customer stakeholders about model behavior, evaluation results, limitations, and tradeoffs
Who You Are
Experience Improving Model Behavior: You have worked with fine-tuning, preference optimization, reinforcement learning, reward modeling, synthetic data, evals, or related post-training techniques
Strong Programming and Experimentation Skills: You can build training and evaluation pipelines, run controlled experiments, analyze results, and iterate quickly
Research-Oriented Builder: You care about understanding why behavior changes, not just whether a benchmark improves
AI Systems Mindset: You understand that model behavior is shaped by data, prompts, tools, retrieval, evaluators, and deployment context—not model weights alone
AI-Native Working Style: You use AI tools daily to accelerate coding, analysis, debugging, experimentation, and research exploration
Bias Towards Measurement: You make behavioral improvements concrete through evaluations, comparisons, regression tests, and production-relevant metrics
Comfort with Applied Constraints: You can balance research ambition with practical constraints around cost, latency, reliability, data availability, and customer requirements
Ownership Mentality: You take responsibility for whether post-training work improves real system outcomes, not just offline scores
What We Offer
The base salary range for this role is $150K – $250K, depending on experience, location, and level. In addition to base compensation, this role is eligible for meaningful equity, along with a comprehensive benefits package
100% coverage of medical, dental, and vision insurance for employee and dependents
Flexible time off
Retirement and financial planning benefits, including access to pre-tax HSA, FSA, and commuter accounts, 401(k), and financial coaching resources
Comprehensive wellness benefits, including physical fitness, mental well-being, and fertility and family-building benefits through Carrot
Complimentary in-office lunches and snacks provided
Access to state-of-the-art AI models, generous usage of modern AI tools, and real-world business problems
Ownership of high-impact projects across top enterprises
A mission-driven, fast-moving culture that values curiosity, pragmatism, and excellence
Distyl has offices in San Francisco and New York. This role follows a hybrid collaboration model with 3+ days per week (Tuesday–Thursday) in‑office.
We believe diverse perspectives make our work stronger and more impactful. We are an equal opportunity employer and evaluate all applicants without regard to race, color, religion, sex, sexual orientation, gender identity or expression, national origin, age, disability, veteran status, or any other legally protected characteristic. We encourage candidates from all backgrounds to apply.