December 15, 2024•8 min read
Domain-Driven Design in Scala: Lessons from Production
How implementing DDD principles transformed our legacy codebase and reduced developer errors by 40%.
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Marcel Philipiak
Value for business. Tranquility for people. Software engineering.
Why me?
I help teams ship the right thing. It lasts.
My work results in faster delivery, predictable projects and
high-quality, pragmatic solutions.
Backend Architecture
Systems design help - built to endure, scale, and keep delivering.
Team Culture
Improve the business process.
Clarify ownership, align outcome. Remove friction.
Legacy Modernization
Remove technical debt, open the product for new features.
Stop firefighting.
Full-Stack Development
End-to-end application development, cloud and on premise.
Proven track record with international Telco, british streaming, German automotive and more.
Let's Work TogetherWork Together
About Me
Backend-leaning fullstack engineer. I specialize in scalable distributed systems and modernizing legacy architectures using functional programming principles.
I enjoy ownership, calling shots and working at high quality projects with driven individuals.
Case Studies
Greenfield System Design –
German Premium Car Manufacturer
Architected and delivered new microservices and system changes, deploying to production within weeks. Achieved high stability and near-zero bugs for months, enabling fast feature rollout.
High-Throughput Event Processing –
Major Telco
Led implementation and refactors of an event processing system handling 500k–900k events/sec using distributed Flink architecture, improving real-time analytics and operational reliability.
Team & Client Alignment –
Enterprise Project
Stabilized a project crisis where client expectations conflicted with the engineering team. Introduced a structured prioritization strategy, aligning stakeholders. Result: accelerated delivery and improved team morale.
Companies I've Worked With
• Mercedes-Benz
• Play/Iliad
• Allianz
• ITV
• TouK
• Europa.jobs
Technology Stack - I dabble.
Languages & Tooling
ScalaKotlinJavaPythonTypeScriptFlinkReactVue
Infrastructure & Tools
DockerTerraformAWSGitHub ActionsLinuxAnsible
Databases & Monitoring
PostgresDynamoDBGrafanaDatadogS3Redis
Methodologies
DDDBDDTDDDistributed SystemsFunctional Programming
Blog
Thoughts on software architecture and lessons learned from building distributed systems at scale.
Get In Touch
Have a project in mind? Let's discuss how we can work together.