SaaS
Data & AI Foundation

Modernizing a Legacy Database with AI: 80% Faster Queries, 4-Month Migration Done in 3 Weeks for Stride

Stride's legacy database was the anchor dragging their entire engineering org. Queries ran for minutes. Environment syncs failed routinely. Feature releases stalled sprint after sprint. RTS Labs used AI-assisted schema analysis and automated migration tooling to complete what would have been a 4-month migration in 3 weeks — with zero data integrity issues and an 80% improvement in query performance.

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Case Study at a Glance
Client
Industry

SaaS

Use Case

AI-Assisted Database Migration & Modernization

Tech Stack

PostgreSQL

Python

dbt

AWS RDS

Time to Production
From brief to live deployment
0 weeks

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1. The Challenge

Stride’s engineering team had been living with a performance problem they couldn’t outrun. The company’s legacy database — built fast in the early days and never properly restructured — had become the bottleneck for everything. Queries that should return in seconds were routinely taking four minutes or more. Complex analytics reports couldn’t run during business hours without impacting production stability. And with the schema undocumented and inconsistently structured after years of ad hoc changes, no one on the team fully understood what they were working with.

The downstream effects were compounding. Three out of four engineering sprints in the prior quarter had been delayed by database-related issues — either performance problems that required hotfixes, or sync failures between environments that forced manual rollbacks. The team was firefighting instead of building. New feature development had effectively stalled, and with competitors shipping faster, leadership knew the database issue had crossed the line from technical debt to strategic risk.

A traditional migration project was estimated at 16+ weeks — months of engineer time spent on manual schema analysis, script writing, and data validation before a single line of production data moved. Stride needed a faster path.

Queries That Broke Workflows

Core business queries were averaging 4+ minutes — slow enough that reports couldn’t run during business hours without degrading production performance. Engineers were scheduling complex queries for off-hours just to avoid the impact.

Avg. query time, peak hours
0 + min

Environment Sync Failures

Data syncing between production, staging, and development environments was failing 23% of the time — requiring manual intervention, rollback procedures, and hours of engineer time to reconcile. Every failed sync was a tax on velocity.

Environment sync failure rate
0 %

Feature Development in Gridlock

Database performance issues delayed 3 of 4 engineering sprints in the prior quarter, forcing the engineering team into constant, daily firefighting. The backlog of features waiting on a stable, performant data layer actively stalled product velocity.

Sprints delayed by DB issues
0 of 4

2. The Engineer Approach

RTS Labs came in with a different frame: instead of treating this as a migration project, they treated it as an AI co-development problem. Rather than assigning engineers to manually reverse-engineer the schema, document relationships, and write migration scripts by hand, the RTS team used LLM-assisted analysis to do in 3 days what would have traditionally taken 3 weeks — producing a complete schema map, normalization recommendations, and a draft PostgreSQL migration plan before a single human script was written. That pace set the tone for everything that followed.

  • AI-Assisted Schema Discovery & Mapping

    Deployed an LLM-powered schema analyzer that ingested the existing database structure, mapped foreign key relationships, identified normalization violations, and flagged data quality issues across every table. Produced a complete current-state schema map and a prioritized normalization plan in 3 days — compressing what is typically a 3-week manual process.

  • Automated Migration Script Generation

    Used the schema analysis output to auto-generate PostgreSQL migration scripts covering table restructuring, data type normalization, index redesign, and constraint enforcement. Each script was validated against a staging replica before touching production — catching edge cases early with zero manual scripting required for the first pass.

  • ETL Framework & Zero-Downtime Data Transfer

    Designed a dbt-powered ETL pipeline to clean, transform, and transfer data from the legacy system to the new PostgreSQL architecture. Implemented incremental load logic and data validation checkpoints at each stage, allowing production to remain live throughout the migration with automated integrity verification at completion.

  • Query Optimization & Production Hardening

    Post-migration, RTS Labs ran a full query performance audit across Stride's highest-traffic endpoints. Redesigned index strategy, rewrote bottleneck queries, and configured AWS RDS monitoring with automated alerting for query time regressions. Delivered documented runbooks so Stride's engineering team could maintain performance independently.

Our legacy database had become a massive bottleneck, stalling feature releases and routinely dragging down production performance. What we thought would be a painful, four-month manual migration was completed by the RTS Labs team in just a few weeks using AI-driven schema mapping and automation. Not only did they preserve 100% of our data integrity, but our core query speeds improved by 80%. We finally have a modern, stable infrastructure that allows our engineering team to ship features with confidence.
VP of Engineering
Stride

3. Results & Impact

Faster Query Performance
0 %
Faster Than Traditional Migration
0 x
Data Integrity Preserved
0 %
Total Project Duration
0 wks

Before RTS Labs

  • Query Bottlenecks

    Queries averaging 4+ minutes — reports couldn't run during business hours without degrading production

  • 23% Sync Failure Rate

    23% environment sync failure rate requiring manual rollbacks and hours of engineering triage per incident

  • 75% of Sprints Blocked

    3 of 4 sprints in the prior quarter delayed by database performance issues — feature development at a standstill

  • Zero Architectural Visibility

    Schema undocumented and inconsistently structured after years of ad hoc changes — no engineer had full visibility

After RTS Labs

  • Sub-45 Second Queries

    Average query time under 45 seconds — 80% faster, with complex analytics now running in real time during business hours

  • Flawless Data Integrity

    Zero sync failures since go-live — clean, validated data transfer with automated integrity checks at every stage

  • Restored Engineering Velocity

    Engineering team shipped 4 consecutive sprints on schedule post-migration, with no database-related blockers

  • Future-Proof Infrastructure

    Fully documented, normalized PostgreSQL schema with automated migration scripts and runbooks for the team going forward

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