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Stephen Webel

Head of Engineering · Revin

Over a decade building and scaling large distributed backend systems — and leading the teams that build them. Lately, bringing AI agents into production.

Now — Revin

Head of Engineering

2024 — Present

Lead engineering at Revin. Brought AI agents from prototype into production, grew the business from five-figure to seven-figure ARR, and built the systems that now support over half a billion dollars in revenue for our customers.

Impact at Drift

~20B
contacts stored
90 TB
data under management
$3M+
annual savings
79→121%
net dollar retention

Selected work at Drift

Drift Intel

$3M+ saved / year

Replaced a rigid, single-vendor data pipeline with a modular, plugin-based architecture. New data-partner integrations dropped from three months to about a week — unlocking cheaper partners and over $3M in annual savings.

Customer Sophistication Model

NDR 79% → 121%

Built a tiered model linking product usage to outcomes. Top-tier customers saw 4.8× daily active conversations and 9.5× pipeline; it became core to how Customer Success onboards and evaluates accounts.

Contacts at scale

millions → ~20B

Designed the systems behind Drift's contact graph as it grew from millions to ~20 billion records and 1 TB to 90 TB. Polyglot persistence across MySQL, DynamoDB, Elasticsearch, and S3 — 31M daily visits at 15K OPS.

The 64-bit migration

0 downtime

Contacts were capped by 32-bit IDs — a looming Y2K-style shutdown. Led a 12-person team rewriting ~10% of the codebase across 600+ PRs, moving primary keys to 64-bit with under five minutes of downtime.

Experience

Head of Engineering · Revin

2024 — Present

Brought AI agents into production, grew the business from five-figure to seven-figure ARR, and built the systems supporting half a billion dollars in revenue for our customers.

Software Engineer → Senior Engineering Manager · Drift

2017 — 2024

Grew from engineer to senior engineering leadership over seven years. Architected the Contact & Account products and integrations (Marketo, Zapier, Salesforce — influencing $1M+ in ARR), scaled Elixir clusters to millions of concurrent connections, then led data-systems and integrations teams, drove SOC2, and mentored rising managers and technical leaders through launches like the Microsoft Dynamics integration.

Software Engineer · Galatea Associates

2014 — 2017

Technical architecture and mentorship; built reference-data and distributed-cache frameworks (Spring, Pivotal GemFire) that improved reliability and cut memory footprint 33%.

Skills

Proficient
Python · Agentic Coding Loops · Java · AWS (DynamoDB, Kinesis, SNS/SQS, RDS) · Kubernetes · PostgreSQL · MySQL · Spring · Dropwizard · Terraform · Git
Familiar
Elixir / Phoenix · ArgoCD · LLMs (OpenAI, LangChain, LlamaIndex)

Education

Colby College

B.A. Computer Science · Minor in Music

2014

Off the clock

Backcountry skiing
Skier
On a backcountry hike
Hiker