Senior AI Engineer

Workstream Platform Services Limited; Washington; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Competitive salary and equity

Comprehensive health coverage

401K Plan

Flexible PTO

Job summary

Workstream Platform Services Limited is seeking a founding Senior Engineer for our AI-Native Services team. You will shape architecture, set the engineering bar, and build the initial team from the ground up, reporting directly to leadership.

This is a full-time, remote position with occasional in-office visits to support cross-functional collaboration and key initiatives. You will own production AI agents, toolchains, and single-source-of-truth automation for bespoke workflows.

Qualifications

• Built and operated at least one AI agent in production.
• Strong judgment across models, orchestration, APIs, data and integrations, permissions, and monitoring.
• Experience working with customers or end users and communicating with non-technical people.

Responsibilities

• Build production agents and agentic workflows with orchestration and data connections.
• Collaborate with design customers and map workflows against live data.
• Create evaluation harnesses with real customer datasets and release thresholds.
• Develop the human-review layer, including queues and escalation paths.
• Run parallel shadow-mode tests to align with existing processes before go-live.
• Turn customer work into reusable agents, playbooks, and integrations.
• Handle production incidents end-to-end and feed learnings back into evals.

Skills

AI agents

Orchestration

APIs & Integrations

Observability

Customer comms

Zero-to-one

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 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 Senior 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.

This is a full-time, remote position with occasional in-office visits as needed to support close cross-functional collaboration and key team initiatives.

• 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 plans, with 100% employer-paid employee-only coverage available on select plans. Dependent coverage options vary by health plan.
• 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.