Evergreen Strategy Logo
EVERGREENSOLUTIONS ARCHITECTURE // PRO

Legacy
Migration.

Don't let your data die in a rented system. We execute 'Rescue Operations' to export, clean, and re-home your critical business data into systems you own.

Phase 1: The Extraction

Most SaaS platforms (Salesforce, HubSpot, proprietary ERPs) make it easy to put data in and impossible to get it out. They disable APIs or charge thousands for "export credits". We treat this as a hostile environment. We deploy custom scrapers to bypass their roadblocks.

Content Scrapers

When APIs are blocked, we visualize the page and read it like a human.

PuppeteerPlaywrightBeautifulSoup

Database Dump

Direct SQL injection (whitelist authorized) to pull raw tables.

pg_dumpmysqldump
DATA REFINERY

The ETL Process

Raw data is toxic. It's full of duplicates, missing fields, and legacy formats. We don't just move data; we refine it. Our ETL (Extract, Transform, Load) pipelines turn messy legacy dumps into pristine, type-safe schemas.

INPUT
Messy JSON / XML Blobs
TRANSFORM
Python Pandas / dbt Normalization
OUTPUT
Clean Postgres / SQL Schema
etl_worker.py
def normalize_customer(raw_data):
# 1. Fix phone formats
phone = clean_phone(raw_data.get('Cell'))
# 2. Split Name fields
first, last = split_name(raw_data.get('FullName'))
# 3. Create UUID
uid = uuid.uuid4()
return User(id=uid, phone=phone, ...)

Phase 2: The Factory

Migration isn't a one-time event; it's a process. We build automated CI/CD pipelines to ensure that data integrity is maintained as we switch from Old World to New World.

CI/CD & Rollbacks

Safety First

We use Github Actions to run migration scripts every night. This simulates the cut-over 100 times before launch.

If any verification check fails, our Auto-Rollback Protocol instantly reverts the database to the pre-migration snapshot, ensuring zero data loss.

> git push origin migrate
> running migration_script.py...
> 14,203 records transferred
> verify_integrity(): FAILED (Checksum Mismatch)
> INITIATING ROLLBACK...
> STATUS: REVERTED (0s downtime)

Stakeholder Comms

No "black box" engineering. We handle the politics of downtime so you don't have to.

Maintenance windows are negotiated and communicated months in advance. We ensure every stakeholder knows exactly when the lights flicker and when they come back on.

  • Slack/Teams Real-time Status
  • Linear / Jira Ticket Sync
  • T-Minus 30 Day Warning Emails
  • "Go / No-Go" Executive Review
Plan an Extraction