Senior Platform Engineer - AI Platform

Porch Group•Seattle, WA

8h•Remote

About The Position

Porch Group is hiring a Senior Platform Engineer for ISN to lead AI-first platform work at the intersection of agentic systems and production infrastructure. The role designs and ships systems that enable agents and LLMs to support high-volume product workflows, including scheduling, report intake, customer communication, billing, and data extraction. It also owns the underlying PHP application, AWS/ECS infrastructure, and MySQL/Aurora data layer. The position offers latitude to define how AI is used at ISN, supported by Porch Group's scale and the data of a home inspection software platform. The role is remote within the United States, subject to state and jurisdiction restrictions listed in the posting.

Requirements

10+ years building and running production software, with real ownership of systems at scale.
Demonstrated hands-on experience shipping LLM-backed features, including agent orchestration, RAG, evaluation, and the operational discipline to maintain them.
Strong PHP 8.x skills in a mature, high-traffic codebase.
Deep AWS architecture experience, hands-on ECS operations, infrastructure as code using Terraform or CDK, and CI/CD.
Expert-level relational database skills with MySQL and/or Aurora, including the ability to read and act on an execution plan.
Strong fundamentals in distributed systems, API design, observability, and application security.
Clear written communication and sound judgment about tradeoffs, especially when AI is not the right tool.

Nice To Haves

Go.
MCP or comparable agent-tooling standards.
Vector search and embedding pipelines.
Kubernetes.
Document and image extraction pipelines.
Real estate, proptech, or field-services domain experience.

Responsibilities

Build AI features end to end, including retrieval, context engineering, structured output, tool/function calling, and evaluation harnesses.
Design and operate agent orchestration systems with multi-agent and multi-step workflows, task decomposition, tool routing, state and memory, retries and fallbacks, human-in-the-loop checkpoints, and guardrails.
Operate non-deterministic systems responsibly through tracing, CI evaluations, prompt and model versioning, token and latency budgets, model routing, and cost controls.
Own ECS container platform operations, including service definitions, task sizing, autoscaling, blue/green deployments, and orchestration for long-running services and asynchronous workers.
Architect AWS infrastructure, including event-driven and serverless pipelines using Lambda, SQS/SNS, and EventBridge, as well as IAM and network design, managed as infrastructure as code.
Build and extend services in the production PHP codebase, integrating AI capabilities into existing product surfaces without destabilizing them.
Drive database performance at scale through schema design, indexing, replication and read scaling, zero-downtime migrations, and query performance work across MySQL and Aurora.
Contribute through code review, design documentation, mentorship, incident response, and on-call participation.

Benefits

Long-term incentive awards, subject to program guidelines and approvals.
Three medical plan options, two dental plan options, and a vision plan.
Voluntary Critical Illness, Hospital Indemnity, and Accident plans.
Pre-tax savings options, including a partially employer-funded Health Savings Account and healthcare, dependent care, and transportation Flexible Spending Accounts.
Company-paid Basic Life and AD&D, and short- and long-term disability benefits.
Voluntary Life and AD&D plans.
Traditional and Roth 401(k) plans with a discretionary employer match.
Employer-paid wellbeing program with guided meditation, mindfulness exercises, mental health coaching, clinical care, and confidential resources including will preparation.
Free year-round discounts for employees and their families, including gym memberships, travel, appliances, movies, and pet insurance.
Flexible paid vacation.
Company-paid holidays, typically nine per year.
Paid sick time.
Paid parental leave.
Identity theft program, travel assistance, and fitness and other discount programs.