John Loli
@johnloli
Data engineering leader building ML-ready pipelines and mentoring engineers to own outcomes.
United StatesWhat I'm looking for
I’m a data engineering leader who has built and owned data infrastructure across healthcare technology for eight years—scaling TB-scale pipelines, standardizing data quality, and delivering ML-ready clinical datasets.
At Opensignal, I’ve served as a player-coach and technical owner: I ran production Airflow orchestration and Python monitoring as the IC, led sprint planning for a 5-person data team, and scaled pipeline ownership from single-person coverage to distributed engineering ownership.
I’m especially proud of the production impact I drove—end-to-end ETL processing 1–3 TB daily, designing incremental load and config-driven validation patterns across 10+ pipelines, and cutting runtime by 35%. I also designed layered Airflow DAG monitoring with statistical thresholds (IQR, Z-score, MAD), automated incident escalation, and an agentic anomaly triage flow that pre-completes 80–90% of engineering investigation notes.
Across Healthy.io and athenahealth, I established modeling and governance standards that outlast my tenure—building dbt infrastructure on BigQuery, creating a data catalog for canonical metrics, and implementing claims analytics governance in Snowflake that enabled faster revenue-cycle decisions. I still write production Python because the best architecture decisions come from someone who has to live with them.
Experience
Work history, roles, and key accomplishments
Owned Airflow orchestration and Python monitoring services in production while leading sprint planning for a 5-person data team and scaling pipeline ownership from single-person to distributed coverage. Built and operated TB-scale end-to-end ETL on Airflow and AWS with config-driven validation and incremental loads (cutting runtime 35%) and deployed a FastMCP agent for anomaly triage that pre-comp
Director of Technical Operations
Healthy.io
Jan 2023 - Jan 2024 (1 year)
Designed cross-cloud data architecture across AWS and GCP/BigQuery to deliver ELT pipelines unifying analytical data for ML models, product, finance, and operations from a single authoritative source. Cleaned and flattened clinical data into ML-ready datasets, implemented data modeling and automated validation standards (increasing data accuracy 25%), and mentored engineers to improve production o
Senior Manager, Analytics Engineering
Healthy.io
Jan 2021 - Jan 2023 (2 years)
Set up dbt infrastructure on BigQuery to deliver curated healthcare datasets and replaced manual cross-team data pulls with automated, versioned reporting models. Engineered custom QC business-rule testing, built a data catalog for canonical metric definitions, and architected event-driven integrations across Salesforce, NetSuite, and USPS APIs to automate supply planning and patient communication
Modeled healthcare claims in Snowflake (denial/rejection rates and ICD-10 codes) to enable denial root-cause analysis and billing workflow corrections, and built a Python event-driven ICD-10 ingestion pipeline using HTTP polling with version fingerprinting to replace a manual process. Established metric governance as a single source of truth for revenue cycle KPIs and optimized critical Snowflake
Managed a team of 8 analysts and planners, building SQL pipelines and Power BI/Tableau dashboards for workforce management operations. Reduced revenue leakage by 15% and recovered 20% in at-risk project revenue through improved operational reporting.
Multi-Persona Agent Platform
Personal Projects
Jan 2025 - Present (1 year 4 months)
Built a Docker-isolated multi-persona, multi-tenant agent platform that orchestrates agent personas (code-reviewer, agent-fixer, ticket-taker) using YAML-defined contexts. Integrated GitHub Actions and project-management polling to route outputs into PR comments and tickets, using MCP servers and agentic workflows.
Education
Degrees, certifications, and relevant coursework
Western Governors University
Master of Science in Management and Leadership, Management and Leadership
Completed a Master of Science in Management and Leadership at Western Governors University.
Nova Southeastern University
Bachelor of Science in Business Administration and Finance, Business Administration and Finance
Completed a Bachelor of Science in Business Administration and Finance at Nova Southeastern University.
Tech stack
Software and tools used professionally
Availability
Location
United StatesAuthorized to work in
Job categories
Skills
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