Senior AI Engineer

Cacheflow; Lehi (UT); On-site; USD 180,000 - 250,000; Full time

Benefits offered by this job

Equity

Health coverage

Office amenities

401K

Flexible PTO

Job summary

Workstream is hiring a Staff Engineer to lead AI-Native Services from zero to one. As the first engineer on the AINS team, you will shape architecture, set engineering bar, and build a team that scales bespoke work into reusable agents and playbooks.

You'll own components, ensure deterministic behavior, and collaborate with customers to map real workflows to live data. This role offers impact, leadership exposure, and equity in a fast-growing startup.

Qualifications

• Built and operated at least one AI agent or agentic workflow in production.
• Strong engineering judgment across models, orchestration, APIs, data and integrations, permissions, and observability.
• Experience working directly with customers or end users, translating needs into technical solutions.
• Ability to break complex workflows into deterministic steps and testable components.
• Familiarity with maintaining safe AI outputs through grounded context and evals.
• Comfort with shipping in zero-to-one environments and continuous improvement.

Responsibilities

• Build and operate production AI agents and agentic workflows.
• Collaborate with design customers and map real-world workflows to live data.
• Create evaluation harnesses with datasets and test thresholds.
• Develop human-review layers, queues, and escalation paths.
• Run shadow-mode trials and drive discrepancies to zero before go-live.
• Turn customer work into reusable agents and playbooks.
• Handle production incidents end-to-end and feed learnings back into evals.
• Help set engineering bar as the team grows.

Skills

AI agent development

Production systems

API integration

Observability

Customer collaboration

Deterministic workflows

Job description

Workstream is a mission-driven company building the all-in-one HR, payroll, and hiring platform for managing the hourly workforce. There are 2.7 billion hourly workers, making up 80% of the global workforce, but this market has been heavily underserved by technology and deserves better. Workstream has been purpose-built for the hourly workforce from day one so that these businesses and their employees can thrive.

Our customers include leading brands from multiple sectors, including Burger King, Carl's Jr./Hardee's, IHOP, KFC, and Culvers. We are a high growth series B company and quickly expanding our product portfolio to deliver on our vision. We are backed by legendary VCs and industry experts like Founders Fund, BOND, and Coatue.

Day In The Life

Workstream is building AI-native services that deliver completed business outcomes—mature service categories businesses already pay for, delivered by AI agents plus a small human review layer at materially better margins than the traditional alternative. We are validating the first service now with design customers from our existing base.

This is a founding engineer opportunity. As the first engineer on Workstream's AI-Native Services (AINS) team, you'll spearhead a new company initiative from zero to one. You'll shape its architecture, set its engineering bar, and help build the team that follows. This is a Staff level role with a direct line to leadership and real influence over how AINS grows. You will not own pricing, deal acceptance, or the margin model—those sit with the Head of Delivery and the Head of GTM. You will own the components: whether they work, how they fail, and how fast bespoke work becomes reusable.

• Build and operate production agents and agentic workflows: orchestration, tool use, data connections, deterministic logic, state, and permissions.


• Work forward-deployed with design customers—sit in their workflow, map the messy reality, and build against live data.


• Build the evaluation harness: eval datasets from real customer work, pre-launch thresholds, regression suites, and post-launch monitoring.


• Build the human-review layer: exception queues, review tooling, escalation paths, and the tracing that makes every agent decision auditable.


• Run shadow-mode parallel runs against the customer's existing process or provider and drive discrepancies to zero before go-live.


• Turn customer-specific work into reusable agents, integrations, and playbooks—productization is the default, customization the exception.


• Handle production incidents end to end, and feed every failure back into evals and controls so it cannot recur.


• Help set the technical bar as the team grows.

Who You Are

• You have personally built and operated at least one AI agent or agentic workflow in production. You can clearly explain how it worked, where it failed, how you evaluated it, and what you kept deterministic or human-led.


• Strong engineering judgment across models, orchestration, APIs, data and integrations, permissions, observability, and evaluations.


• You have worked directly with customers or end users—discovery, implementation, or incident resolution—and communicate clearly with non-technical people.


• You can break a messy workflow into deterministic steps, agentic decisions, human judgment, and exception paths—and define how each part will be tested.


• You care about keeping plausible but wrong AI output away from customers: grounded context, constrained actions, verification, evals, review, monitoring.


• You thrive in zero-to-one ambiguity: shipping weekly, owning outcomes, and doing whatever the service needs—including unglamorous review tooling and data plumbing.


• Exposure to a regulated domain (payroll, payments, tax, benefits, labor compliance) is a plus, not a requirement.


• Demonstrated production experience matters more than title or years.

What We Offer

• A mission-driven and value-based company dedicated to empower deskless workers and local businesses


• An early employee opportunity at a Series B hyper-growth startup; work with the founding team and industry veterans to accelerate your career


• Competitive salary and equity


• Comprehensive health coverage: medical, dental, and vision. We pay 95% of your premiums for our employees and 85% for dependents


• In office amenities and stocked kitchen


• 401K Plan


• Flexible PTO

Know More About Workstream

• https://www.workstream.us/blog/funding-series-b


• https://techcrunch.com/2021/08/26/workstreams-text-based-recruitment-tool-gets-a-48m-bet-from-bond-and-beyond/


• https://techbuzz.news/buzzworthy-august-27-2021/

Additional Information

Workstream provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.

We are committed to the full inclusion of all qualified individuals.