Andrew Carmer

Homebot.ai

Senior Software Engineer — Remote, Denver, CO · June 2025 – Present

• Cut support tickets 70-80% and reduced response times from months to hours by shipping proactive and reactive AI agents across support, customer success, and engineering.
• Replaced a product that had taken a team of 4-8 engineers roughly 2 years to build, shipping the full rewrite in 6 months as sole engineer and product manager, and cutting infrastructure and vendor spend $5,000+/month.
• Partnered directly with 3 enterprise design partners across lending, real estate, title, and insurance - Guild Mortgage, Newrez, PrimeLending, Huntington National Bank, KeyBank, and Windermere among them.
• Opened title and insurance as new segments through customer discovery and feature development, unlocking a serviceable market of ~$10.2M MRR / $122M ARR, and partnered with the ALTA title registry.
• Built the AI agent backend behind the company's customer chat and support products (Mastra, AWS Bedrock), including a federated GraphQL gateway across 12+ data subgraphs with per-tenant isolation at the schema level.
• Delivered the first federated-GraphQL self-query tool so the AI agent could answer live customer questions against production data, then led its evolution to SQL self-query with a persistence layer for auto-updating customer dashboards.
• Created the evaluation harness for both agents - scenario suites, scoring rubrics, and regression gates - so prompt, model, and tool changes ship on measured output quality, not opinion.
• Ran the agents across AWS Bedrock, Anthropic Claude, and OpenAI with per-task routing and fallback, tuning retrieval over pgvector and Elasticsearch, tool-result trimming, and conversation compaction to hold quality and cost inside the context window.
• Cut average tokens per model call 37% by moving workflows from tools to skills, with prompt caching and reusable generative-AI component libraries; enforced guardrails, PII redaction, and explicit database grants over what each agent can reach.
• Automated engineering workflows across 20+ repos with Claude Code and Codex - custom AI skills, plugins, and agentic workflows for code review, runbook execution, and documentation.
• Corrected 9.5 million misattributed records and removed a query-cost blowup from a customer-facing lookup path, redesigning the data model on a platform of 131TB active Snowflake databases and a 2.3TB Postgres store.
• Tripled the PR merge rate from 2024 to 2026 by reorganizing the team into small cross-functional pods; reviewed 480+ pull requests and authored 9 design documents and 7 runbooks that became the org's source of truth.

CorePilot

Senior Product Engineer — Remote, Denver, CO · November 2024 – June 2025

• Worked directly with design partners as the engineering voice, turning their operations into product requirements.
• Built against design-partner systems that ranged from modern marketplaces to a 30-year-old custom ERP running on a single Windows laptop that served an entire company.
• Took the AI quoting system from early beta to a “V2” on multiple LLMs, and built an evaluation tool that decided whether a workflow was promotable.
• Designed and shipped the inventory-management module on modern Rails (Hotwire Turbo, Stimulus), with configurable rules letting each customer onboard its own workflows.

Pikl.ai

Founding Engineer — Remote, Denver, CO · January 2024 – November 2024

• Guided a pre-revenue staffing-industry PaaS spin-off to $3M in pre-seed funding within seven months of inception, working directly with design partners, the CPO, and the CEO.
• Led 4 engineers from concept to MVP, owning architecture and backend while contributing full-stack across web and mobile (Next.js, React, GraphQL in Ruby and Python, Redis, AWS).
• Architected a white-labeled, multi-tenant PaaS that deployed each staffing agency on its own domain, with custom-domain/DNS APIs, a fault-tolerant event-driven scheduling service, and integrated LLM vendor APIs.

Vangst

Principal Engineer / Director of Engineering — Remote, Denver, CO · July 2022 – August 2024

• Grew the Product & Engineering team to 15 across 3+ product leaders, then led a deliberate contraction back to 3 engineers and returned to full-time individual contribution - a decision essential to the company's survival.
• Reported to the CEO and advised C-level leadership on technical strategy, while coding and architecting features day to day.
• Repositioned the team toward an integrated job-board and staffing-services product, and supported technical research for multiple acquisition evaluations.

Vangst

Principal Engineer / Lead Backend Developer — Remote, Denver, CO · March 2020 – July 2022

• Rebuilt the product in 1.5 years as backend lead on a lean Product/Engineering team, leading to a $20M Series B (Jan 2022).
• Lifted job-application conversions 25% and monthly active users 11%, added $20K MRR from a “Learn”/quizzes feature, and grew retention with job scraping, on GraphQL APIs architected in Node/Apollo and Rails.
• Migrated the backend from Node to Rails on a shared database, shipping incrementally while the Node backend sunset; rebuilt CI/CD for multiple daily deliveries and refactored the Salesforce integration.

Allogy Interactive

Principal Engineer — Remote, Denver, CO · May 2018 – April 2020

• Worked directly with clinical and operations staff at a Level 1 trauma center (Jackson Memorial Hospital, Miami), turning undefined clinical and business processes into an integrated ERP.
• Deployed into the customer's HIPAA-regulated environment, integrated with the Cerner EMR over HL7 (Rails, Postgres, AWS, Jenkins), targeting reduced average length of stay (ALOS).

Electric Chili Co. LLC

Co-founder — Denver, CO (concurrent, part-time) · May 2017 – May 2019

GoSpotCheck

Software Engineer II — Denver, CO · May 2017 – May 2018

Turing School of Software & Design

Instructor — Denver, CO · August 2015 – May 2017