Job description

INTRODUCING KEPLER THE PROBLEM High-stakes industries are falling behind on AI adoption. Their workflows can’t afford wrong answers. And AI can’t be trusted to give right ones because of hallucinations. The barrier isn’t that the models aren’t smart enough. It’s that no one can verify what they produce. The fix isn’t a better model, it’s a trust layer: every output traceable, every calculation auditable, every answer reproducible. WHAT KEPLER IS Kepler is the agent harness - the infrastructure layer that wraps around AI models to make their outputs reliable, traceable, and verifiable. The model is a replaceable component. The harness is the product. In Kepler's architecture, the LLM orchestrates - it decides what data to gather, what to compute, how to structure the output. But every actual data point, every extracted value, every calculation flows through deterministic code pipelines. The LLM never touches the data itself. Every value carries provenance metadata back to its exact source. Every computation is auditable and reproducible. Verification loops cross-check outputs before users ever see them. We started in finance because the stakes are highest and the tolerance for error is zero. We’ve built a finance research product that lets analysts supercharge their workflow: pulling comparables, building models and researching filings. No more double-checking every number AI spits out. Every number tracing back to the source, every time. But the architecture - provenance, deterministic computation, verification - applies anywhere trust in AI output matters: chemicals, legal, healthcare. Models are commoditizing fast. The trust layer is what's missing and the market is massive. THE TEAM The founding team spent a combined 40+ years at Palantir building the type of large-scale data infrastructure that Kepler requires. Our founding engineers led Foundry's core systems - Ontology, Fusion, Workshop, FoundryML, created Palantir's first AI platform and scaled data products at Meta to 1B+ users. We’ve paired this deep technical foundation with a repeat founder profile. Our CEO built and scaled a data company to $15M ARR before successfully selling it. He then became Citadel's first Head of Business Engineering, experiencing first hand the problems we are now solving. We have a team who’ve been on both sides: building systems like this at massive scale and selling it into the buyers who need it most. We’re backed by investors who built the modern AI and data stacks, plus the builders of iconic commercial businesses. This includes founders of OpenAI, Meta AI Research, MotherDuck, dbt Labs and Square as well as PebbleBed, Company Ventures and Mantis VC firms. THE ROLE WHAT YOU'LL OWN You'll build the agentic infrastructure that powers Kepler's AI research platform. You'll work on the foundational systems that make autonomous AI agents reliable at scale: distributed execution frameworks that run thousands of agents in parallel, evaluation systems that ensure agent quality, context management that maximizes agent performance, and the ontology and provenance systems that let us trace every number back to its source. This role is for engineers who want to work at the frontier of AI systems, building the infrastructure that makes agents trustworthy for enterprise-critical decisions. This is our most senior individual contributor role: you build the runtime our agents execute on, the layer the models, workflows, and product all depend on. Within your first 90 days, you will: - Own a production agent system end-to-end, from architecture to deployment - Build and deploy infrastructure that powers real financial research workflows - See your code enable agents to conduct research at top financial institutions WHAT YOU'LL DO - Build agent execution infrastructure: Distributed systems that orchestrate and run massive numbers of agents in parallel with reliability, retry logic, and graceful degradation. - Build evaluation systems: Frameworks that measure agent quality, catch regressions, and ensure agents perform reliably across diverse research tasks. - Optimize agent performance: Context compression, prompt optimization, model routing, and latency reduction. Make agents faster and smarter. - Build ontology and provenance systems: The semantic layer that maps concepts to precise definitions and traces every output back to authoritative sources. This is what makes our platform trustworthy. - Integrate AI into production: Language models powering intelligent research workflows with robust error handling, fallback mechanisms, and cost optimization. - Own systems end-to-end: Design to production. Services, database optimization, deployment, monitoring. - Ship with production excellence: Comprehensive testing, monitoring, deployment pipelines. You own reliability for what you build. WHO YOU ARE - 7+ years building production software. No upper limit, comp scales with experience. - Backend: deep distributed-systems experience. Our backend is Rust, but we don't require Rust experience. We believe strong engineering fundamentals and experience in other languages is what matters. - Architecture: Experience designing systems that scale and handle complex workflows - AI/ML systems: Experience building with LLMs, agent frameworks, or ML infrastructure - Data: Large datasets, ETL pipelines, knowledge graphs or semantic systems a plus - Practices: Git workflows, CI/CD, automated testing, observability - Strong communicator who can discuss technical trade-offs clearly - Curious about the frontier of AI agents and eager to push what's possible - Thrives in fast-paced environments with high ownership Don't check every box? Apply anyway. We prioritize problem-solving ability, systems thinking, and drive to build transformative agentic infrastructure. OUR TECHNICAL STACK - Backend: Rust - agent orchestration, data extraction, computation pipelines. - Frontend: TypeScript, React - the analyst workspace and verification interfaces. - Data: PostgreSQL, plus direct integrations with official data sources. - Infra: AWS. - AI: Model-agnostic by design. We currently use Claude and GPT. The model is the replaceable part. MENTORSHIP & GROWTH You'll be directly mentored by engineers who built Palantir's core systems. Expect: - Weekly 1:1s with senior engineers who've built systems at Palantir and Meta scale. - Deep architectural reviews and guidance on system design. - Clear growth path toward technical leadership and system ownership. - Learn by building production systems that power real financial research. WORKING AT KEPLER OUR BENEFITS - 100% covered top-of-the-line medical, dental, and vision insurance for employees and their families. HSA maxed by the company to the IRS limit. - Automatic coverage for life, AD&D, and disability insurance. - Daily lunch in office. - Unlimited PTO policy. - Development environment budget - latest MacBook Pro, multiple monitors, ergonomic setup, and any development tools you need. - "Build anything" budget - dedicated funding for whatever tools, libraries, datasets, or infrastructure you need to solve technical challenges, no questions asked. - Learning budget - attend any conference, course, or program that makes you better at what we're building. OUR OPERATING PRINCIPLES - Trust as the Default: People do their best work when confidence is mutual. We show our work, keep our promises, and flag risks before they bite. Trust isn't an aspiration - it's the baseline. - Forward-Deployed with Product DNA: We own customer outcomes while building a product company. We don't win if they don't win. - Extreme Ownership: If you notice a problem, you own it by making sure it doesn’t fall through the cracks. Authority comes from initiative, not job titles. Once you step up, you're accountable for the outcome. - Production-First Engineering: We design for critical workloads from day one. Durable execution, blue/green deploys, automated rollbacks, continuous delivery with end-to-end observability. - Communicate with Intent: Great work disappears without great communication. We push information to the people who need it, when they need it. Silence is never the safe choice. - Earn it Every Day: Your work speaks for itself. We create an environment where the best idea wins, the strongest work gets recognized, and everyone is held to the same high standard. - Keep Raising the Bar: Great teams compound. Every hire raises the bar, every win gets named, every person gets the tools and runway to grow. Kepler is an Equal Opportunity Employer and prohibits discrimination and harassment of any kind. We are committed to the principle of equal employment opportunity for all employees and to providing employees with a work environment free of discrimination and harassment.

Requirements

Must-haves

Kepler is the agent harness - the infrastructure layer that wraps around AI models to make their outputs reliable, traceable, and verifiable. The model is a replaceable component. The harness is the product.
Own a production agent system end-to-end, from architecture to deployment
Build and deploy infrastructure that powers real financial research workflows
See your code enable agents to conduct research at top financial institutions
Build agent execution infrastructure: Distributed systems that orchestrate and run massive numbers of agents in parallel with reliability, retry logic, and graceful degradation.
Build evaluation systems: Frameworks that measure agent quality, catch regressions, and ensure agents perform reliably across diverse research tasks.
Optimize agent performance: Context compression, prompt optimization, model routing, and latency reduction. Make agents faster and smarter.
Build ontology and provenance systems: The semantic layer that maps concepts to precise definitions and traces every output back to authoritative sources. This is what makes our platform trustworthy.
Integrate AI into production: Language models powering intelligent research workflows with robust error handling, fallback mechanisms, and cost optimization.
Own systems end-to-end: Design to production. Services, database optimization, deployment, monitoring.
Ship with production excellence: Comprehensive testing, monitoring, deployment pipelines. You own reliability for what you build.
7+ years building production software. No upper limit, comp scales with experience.
Backend: deep distributed-systems experience. Our backend is Rust, but we don't require Rust experience. We believe strong engineering fundamentals and experience in other languages is what matters.
Architecture: Experience designing systems that scale and handle complex workflows
AI/ML systems: Experience building with LLMs, agent frameworks, or ML infrastructure
Practices: Git workflows, CI/CD, automated testing, observability
Strong communicator who can discuss technical trade-offs clearly
Curious about the frontier of AI agents and eager to push what's possible
Thrives in fast-paced environments with high ownership
Don't check every box? Apply anyway. We prioritize problem-solving ability, systems thinking, and drive to build transformative agentic infrastructure.
Backend: Rust - agent orchestration, data extraction, computation pipelines.
Frontend: TypeScript, React - the analyst workspace and verification interfaces.
Data: PostgreSQL, plus direct integrations with official data sources.

Nice-to-haves

Data: Large datasets, ETL pipelines, knowledge graphs or semantic systems a plus

Application prep

Use the role’s language and application details while tailoring your materials.

Keywords to mirror

aillmrustmlci/cdtypescriptreactaws

Platform: ashby
Effort: quick

Benefits

Benefits detected in the listing.

Dental

Vision

Pto

Learning Budget