AI Platform Engineer Long-Horizon Agents & Evals
Fieldguide.ai
Fieldguide is hiring for a role on the Foundation Agents team in San Francisco. You will own and evolve AI agents, focusing on long-horizon capabilities that perform real-world tasks and scale reliability across production systems. The role emphasizes hands-on AI product development, robust evals, and backend engineering to ensure quality and platform stability. Competitive compensation with equity and in-person offsites across the U.S. are offered. #J-18808-Ljbffr
$250k
...What if an agent didn't stop after one task, but kept working on... ...'s the bet behind a brand-new AI lab in San Francisco. The founding... ...Their thesis: once agents run long enough, raw capability stops... ...They're hiring 4 founding-level engineers . What you'll own Whole...SuggestedFull timeVisa sponsorship- ...Town Town (town.com) is AI that starts from who you are.... ...you'll own. You'll build the evals and quality systems that turn... ...crucially, across multi-step agent trajectories. Stand up golden... ...breaking what works. Partner with engineers across the product to...SuggestedWork at office
- ...Retool Inc. is seeking an AI Engineer to build the agent platform behind Retool's AI products and own model-driven behavior in production. You will... ...prompting, context construction, retrieval, routing, and tool-use strategies for long-horizon workflows. #J-18808-Ljbffr...Suggested
$200k - $300k
...Job Description Senior/Staff Applied AI Engineer, Agent Harness Company: Confidential — AI coworkers... ...across real customer workflows and long-horizon tasks. A defining principle at Init... ...as code. You will build and run evals against replicas of real customer...SuggestedFull timeContract workH1bWork at officeVisa sponsorshipMonday to Friday$200k - $300k
...Our client is a pre-seed AI startup in San... ...focused product where an agent registers as a governed... ...customer workflows and long-horizon tasks. A defining stance... ...You'll build and run evals against replicas of real... ...Must-Have ~4+ years of engineering experience ~ Experience...SuggestedFull timeContract workH1bWork at officeVisa sponsorshipMonday to Friday$380k
...Agent Post-Training, Frontier Evals and Environments Research Agents - San Francisco... ...multi-agent coordination, long-horizon execution, factuality, instruction... ...work with researchers, engineers, product teams,... ...About OpenAI OpenAI is an AI research and deployment company...$180k - $240k
The Video Agent team builds a product that turns prompts... ...open jobs: We Love AI Jobs lists 329 open mid-... .... The posting also says engineers work directly with HeyGen... ...mistakes, and how it handles long, multi-turn... ...Measure quality. Build evals and offline replays of real...Permanent employmentRemote work$198.75k - $295k
...senior and staff-level fullstack engineers eager to join the team building our leading Magic AI features. At Hex we're deeply... ...engineering teams on integrating into the platform. The fruits of your work will... ...our lifetimes. As part of our Agent Platform team, you’ll own the...Work at officeFlexible hoursShift work2 days per week1 day per week- ...most trusted healthcare platform powering outcomes. We... ...and responsible AI to surface meaningful... ...decisions that shape agent behavior, including prompting... ...partnering with Product and Engineering on the systems that... ...workflows, including long‑horizon, multi‑turn agentic...Remote workFlexible hours
- ...Sierra is a leading platform for customer-facing AI agents, based in San Francisco and expanding offices globally. We value trust, customer obsession, craftsmanship, intensity, and family, and seek builders who can advance post-training methods and deploy reliable agents...
- ...Sift, the data infrastructure platform for hardware engineering teams, is seeking a product engineering leader to own a key customer-facing area of Sift Agents. You will talk to customers, decide what to build, and shepherd features from MVP to production, including dashboards...
- ...Sierra is the leading platform for customer-facing AI agents, based in San Francisco with offices across North... ..., Europe, and Asia. We are seeking engineers to build scalable, end-to-end... ...systems and reusable infrastructure for Horizon agents. Join a team that blends...
$197.3k - $225.1k
...AI Engineer 4 (Gen AI Platform Services: Agentic AI, Agent Guardrails, Agent Evaluation, Agent Memory) At Capital One, we are creating responsible and reliable... ...systems. Contribute to the technical vision and the long term roadmap of foundational AI systems at Capital...Full timePart timeLocal area- ...startup (1-10 employees) building AI coworkers for IT teams: a security-focused product where an agent registers as a governed... ...across real customer workflows and long-horizon tasks. A defining stance: the... ...as code. You'll build and run evals against replicas of real...Full timeContract workH1bVisa sponsorship
- ...Semiotic.ai builds advanced AI agents that power decentralized systems, combining... ...CEO , collaborate with engineering and research teams, and engage... ...Define and execute the long-term product strategy for... ...Semiotic.ai’s micropayments platform. Partner with the CEO and...
$236.7k - $319.5k
...right in.About the roleAs a Sr Director - AI & Platform Engineering you are accountable for building and operating the enterprise agent platform that enables every team to safely... ...orchestration engine that supports durable, long-running, and human-in-the-loop workflows....Minimum wage$310k - $400k
...is the world’s leading API platform, used by more than 45 million+... ...OpportunityAs the Head of AI Platform Engineering at Postman, you will lead the... ...platform expansion, and AI-driven agent functionality.Identify and... ...about. We’re building a long-term company with an inclusive...Full timeWork at officeFlexible hours3 days per week$91.3k - $124.4k
...ideas. This is an early-career engineering role focused on building,... ...improving cloud data/analytics platforms (e.g., Microsoft Fabric, Snowflake... ...)Demonstrated experience with AI/ML/GenAI enablement (model... ...participate in a discretionary long-term financial incentive plan,...Full timeContract workInternshipLocal areaFlexible hours$112.8k - $153.7k
...your ideas. This is a senior engineering role. You will architect, operate... ...cloud data and analytics platforms (e.g., Microsoft Fabric, Snowflake... ..., etc.) are a plus.Hands-on AI/ML/GenAI enablement experience... ...participate in a discretionary long-term financial incentive plan,...Full timeContract workLocal areaFlexible hours$120k - $220k
...Liberate builds AI agents to automate manual tasks for the $2.7T insurance... ..., servicing, and claims. Our long-term vision is to build... ...Role We are seeking an AI Agent Engineer to bridge the gap between our... ...data integration, and cloud platforms. Strong technical background...Work at officeFlexible hours2 days per week$231k - $340k
...combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise,... ...Overview As a Staff Software Engineer on the Model Infrastructure... ...model training platform Agent infrastructure and CcaaS... .... ~ Ability to balance long-term architecture with pragmatic...- ...About Varick. Varick builds AI agents that take over real operational... .... Our forward-deployed engineers and strategists embed with client... ...Role. You build Varick OS, the platform every agent runs on: the... ...Build the agent runtime: long-running workflows against enterprise...Work at officeFlexible hours
$290k
...integrated GenAI cloud platform. We own the data centers... ...that power today's AI stack using sustainable... ...looking for a Principal AI Engineer (Specialised) to lead... ...serving architecture, the evals that prove model... ...the pillar Identify long-horizon systemic risks early (serving...Flexible hours$221k - $258k
...technology companies, across AI, bio + healthcare, consumer,... ...RoleWe’re hiring a Senior IT & AI Platform Engineer to build, deploy, and operate... ...multiple AI coding agents, managing AWS or GCP infrastructure... ...in a first class wayWe take a long view of relationships,...Work at office3 days per week- ...Fieldguide AI Platform Agent DevelopmentFieldguide is establishing a new... ...Foundation Agents team stewards the long-horizon agents powering the... ...with senior engineers on the team to execute the... ...LLM APIYou're curious about evals and error analysis. You want...
- ...Brex is seeking an AI Engineer to advance the Finance Agents team in San Francisco. You will build Brex's Agent Workbench, a singular surface for finance... .... You will evolve the workbench into an extensible platform supporting multiple agent experiences, and own the extension...
- ...founder at Magic Patterns! Our engineering team has grown a lot over the last... ...the product. If you’re an AI engineer, our roadmap is... ...wanted to work on: An AI agent that thousands of users use religiously everyday Evals with a self-improving agent loop...
$215k - $235k
...of biology, hardware, AI, and IoT. Bombadil can... ...cards, learning loops, agents, and scheduled work. You... ...report to our Director of Engineering, with a direct line to... ...schema exposing our platform's data and insights, including... ...systems, rather than a long-tenured backend or data...Full timeWork at officeImmediate start- ...Gusto is seeking a senior software engineer to own end‑to‑end design and delivery of our Otto AI agent platform. You will work across the Rails/GraphQL backend, the LLM runtime, and the agent-facing frontend to ship capable, safe capabilities for small business customers...
- ...About the team The Agent Enablement AI Deployment Engineering (ADE) team works across engineering, product, design... ...someone who can contribute to the platform itself, lead sophisticated technical... ..., privacy, reliability, and long‑term maintainability. Run hands‑...Work at officeRelocation package
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