ListKit
Stabilized and hardened a B2B lead generation SaaS platform processing thousands of orders daily
Summary
Stabilized a B2B lead generation SaaS platform by diagnosing a months-long parallel order processing failure, adding Datadog observability, hardening with Polly resilience patterns, and blocking recurring script attacks via Cloudflare WAF, restoring the platform to process thousands of orders daily without incidents.
The Challenge
ListKit, a B2B lead generation SaaS platform, had a months-long parallel order processing failure that stalled thousands of orders and was driving customer churn. The root cause was unknown, and the platform lacked the observability tooling needed to diagnose it.
The Solution
Added Datadog observability to identify the root cause of the processing failure. Hardened the platform with Polly resilience patterns and automated testing. Blocked recurring script attacks via Cloudflare WAF and bot rules.
The Results
The platform went from thousands of stalled orders to processing thousands of orders daily without incidents. Customer churn from order failures stopped. The platform gained observability, resilience, and security hardening that continue to protect it in production.
Client (Industry)
ListKit (B2B Lead Generation SaaS)
Services
Custom Software Development Database Development API Development and Integration Cloud Migration and Deployments Agile DevOps
Technologies
GitHub Actions Datadog Polly OpenAPI REST APIs Shouldly Swagger ASP.NET Core C# Cloudflare Entity Framework SOLID SQL Server Windows Services YAML CI-CD SonarQube MSTest
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Joe was essential in stabilizing and scaling our production order infrastructure.
He quickly grasped a complex environment, took ownership of critical reliability and DevOps initiatives, and consistently delivered high-quality solutions without supervision.
Communication was clear, expectations were aligned, and he proactively raised risks and considerations.
I would love to work with him again on any full-stack or high-stakes reliability work.
Oliver Schmalholz
CTO
ListKit
