HRTech // Client Project

Engineering Retention:
24% Lower Staff Turnover.

We built a practical HRTech solution combining de-identified data stream, AI-powered sentiment prioritization, and manager intervention loops. The project delivered 24% Churn Reduction and 88% Prediction Accuracy.

Key Results RESULTS
24%
Churn Reduction
Reactive HR
88%
Prediction Accuracy
ROI: 14 Weeks
Zero
personal information Exposure
SOC2 GATED

Trusted by teams building ambitious products

What We Set Out to Improve.

Industry
HRTech

Scale-up with 800+ engineers across 4 time zones facing aggressive headhunting and high replacement costs.

How We Worked
Dedicated product team

Language AI Specialist + Data Privacy Engineer + MLOps Lead embedded within People Operations and Engineering Leadership.

Goal
Talent Retention & Continuity

Moving from reactive exit interviews to early stay conversations triggered by behavioral data anomalies.

What We Built
Sentiment Platform

A practical solution designed around the client’s existing tools, teams, and day-to-day workflow.

What Was Getting in the Way.

The client suffered from silent churn, high-performing engineers resigning without prior warning or negative performance reviews. Existing engagement surveys were too slow (quarterly) and suffered from low participation rates among technical staff.

The biggest issues were knowledge leakage, replacement tax, and privacy anxiety. The team needed a faster, clearer way to manage the work while keeping the right checks in place.

Knowledge Leakage
Turnover in senior engineering pods was causing 3-month project delays and a loss of critical system system design IP.
Replacement Tax
Average cost to replace a Senior Engineer (hiring, onboarding, ramp-up) reached $250k+, eroding R&D budgets.
Privacy Anxiety
Previous attempts at people analytics were rejected by the engineering committee due to lack of transparent removal of identifying details.
The Solution

What We Built.

01
De-Identified Data Stream
Designed a secure proxy that strips personal information and content from Jira/GitHub/Slack events, keeping only temporal and engagement data (e.g., commit frequency, PR review response time).
Key details
Type Data Only
Privacy Differential Privacy
Compliance GDPR Native
02
AI-powered Sentiment Prioritization
Added a Transformer-based model that analyzes anonymous pulse-survey sentiment against engineering speed benchmarks to flag High Burnout Risk cohorts.
Key details
Model RoBERTa Ensemble
Trigger AI Assisted
Accuracy 88% F1 Score
03
Manager Intervention Loops
Automated Manager Briefs provided to leaders with team-level insights and prescriptive Stay Conversation scripts, ensuring a fully traceable intervention path.
Key details
Output Prescriptive Brief
Trace Traceable Data
Controls SOC2 Ready
Before and After

How the Workflow Improved.

Area
Before
After
Data Signal

Pulse Surveys

Quarterly, manual self-reporting with high bias and 40% participation rates.

Engagement Data

Live, passive data collection of work-rhythm signals across the dev-stack.

Privacy Model

Opt-In Content

Manual reviews of Slack or Email that compromised trust and individual privacy.

Zero-Knowledge Hash

Models process hashed data patterns without ever accessing message content.

HR Response

Exit Interviews

Diagnostic data captured after the engineer has already decided to leave.

Early Intervention

Engagement alerts triggered 30-45 days before at-risk behaviors culminate in resignation.

Key Features

What Made the Solution Useful.

Secure by Design

Differential Privacy Layer

Mathematical noise injection into data ensures that individual engineers cannot be identified, even if the database is breached.

Business impact
100% Dev Acceptance
AI Assisted

Prescriptive Action Bots

AI-powered workflows generate personalized coaching tips for managers based on the specific burnout signals identified in their team.

Business impact
92% Brief Adoption
Live Updates

Speed Anomaly Detection

Live identification of PR-response time spikes or silent GitHub activity drops as a proxy for technical disengagement.

Business impact
Zero False Flags
Faster Delivery

How We Reduced Build Time.

Tested foundations helped the team spend less time on setup and more time on the parts that made this product useful.

What accelerated the work

4 reusable building blocks
01

Privacy-Proxy Module

A tested starting point for privacy-proxy module reduced repeated setup work.

02

Workplace Sentiment Module

Reusable work for workplace sentiment module let the team focus more time on the client’s specific needs.

03

Talent Monitoring Platform

This made it easier to add talent monitoring platform without rebuilding common foundations.

04

Retention FinOps Module

A tested starting point for retention finops module reduced repeated setup work.

Results

The Business Difference.

A straightforward before-and-after view of what changed for the team and their customers.

RESULT: RETENTION01

Avoidable Turnover Reduction

Early interventions saved valuable engineering staff who would have previously resigned without warning.

Older BaselineHigh Churn
Coretus Platform24% Lower
Outcome24% Churn Reduction
RESULT: Accuracy02

Turnover Prediction (F1)

Identifying at-risk engineers with high accuracy allowed for targeted management resources.

Survey Guess40%
ML Inference88%
Outcome88% Accuracy
RESULT: ECONOMICS03

Replacement Costs Saved

Lower churn directly translated into millions of R&D budget preserved for product innovation.

Standard$3M+ Lost
Coretus$720k Saved
Outcome$720k Less First Quarter ROI
Results24% Churn Reduction • 88% Accuracy
Trust and Control

How We Kept It Safe and Reliable.

01
Data Anonymization
All workflows use k-anonymity and differential privacy to ensure individual identities are never exposed.
GDPR COMPLIANT
02
Model Bias Safety controls
Models are audited bi-weekly for gender and racial bias in engagement scoring to ensure equitable retention efforts.
BIAS CHECKED
03
Growth and Reliability
Cloud-based data collection handles 1M+ weekly dev events with sub-second processing response time.
CLOUD NATIVE
04
Code and IP Ownership
Coretus provides 100% IP ownership of all retention models and privacy proxies upon completion.
100% OWNED
Client Testimonial

In their own words.

Coretus solved the impossible: they gave us visibility into engineering morale without breaking developer trust. We’ve reduced churn by 24% by having the right conversations at the right time, powered by data we didn't know we could use safely.

Turn HR Data into a Long-Term Advantage.

Have a similar challenge? We can help you plan and build a practical HRTech solution around your goals, budget, and existing systems.

GDPR & SOC2 Privacy Gated

88% Prediction Accuracy

100% IP & Model Ownership