Krystian Gadomski

Optimizing When Others Wanted to Replace

Proving the Value of Smart Optimization

Challenge:

Legacy order processing system couldn't handle growing volume. Management decided to invest in Microsoft Dynamics AX replacement.

My Approach:

• Advocated for optimization over replacement during architectural discussions
• Proved the concept by actually optimizing the code during evaluation phase
• Deep-dived into the legacy codebase everyone had given up on
• Identified and fixed performance bottlenecks without breaking business logic

Results:

• 10x performance improvement
• Avoided months of rewrite work and dedicated team allocation
• System still running flawlessly years later
• Demonstrated that strategic optimization can extend system lifespan

Pharmaceutical E-Commerce Ecosystem

apteline.pl - Architecting from Ground Up

Challenge:

Design and build Poland's pharmaceutical e-commerce ecosystem with integrated logistics and financial systems.

Complexity:

• Designed solution architecture and defended it across development, architecture, and security departments
• Coordinated 4 teams (internal dev, admins, business, external Magento team)
• Worked with database and application administrators (2nd line support) to ensure easy maintenance and monitoring
• Built ecosystem of interconnected applications, not just single platform
• Integration with SAP, logistics and financial systems
• API contract design for external teams
• Ensured high quality standards and smooth cross-team communication

Results:

• Successfully launched one of Poland's largest online pharmacies
• Zero critical issues post-launch
• Still processing thousands of orders daily at apteline.pl

The Three-Second Freeze That Almost Killed a Project

When Garbage Collector Becomes Your Enemy

Challenge:

Telemarketing system freezing for 3-4 seconds during calls. Operators couldn't take pharmaceutical orders. Root cause was unclear due to wrong architectural decisions made early in the project. High pressure from business side, IT management getting nervous.

Technical Deep-Dive:

• Visited telemarketing department to observe operators and understand their workflow and pain points
• Built empathy with users by showing we care and are proactive
• Made strategic decisions on what to test (focused on Garbage Collector behavior)
• Analyzed .NET garbage collector and found architectural decisions causing memory pressure
• Identified large object heap fragmentation issue
• Implemented Proof of Concept and presented results to stakeholders
• Led team implementation of final solution based on PoC findings

Results:

• Eliminated the freezes completely
• Restored system stability and responsiveness
• Operators could work efficiently without interruptions
• Relieved extreme business and management pressure

Enterprise Document Exchange Platform

EDI - Electronic Document Interchange

Challenge:

Design and build electronic document exchange system for enterprises across different industries.

Scope:

• Multi-tenant architecture design
• Industry-agnostic document formats and transformations
• Developed connectors to different ERP systems
• Built web application for document management
• Real-time document tracking and processing
• Scalable solution architecture

Technical Stack:

• Service-oriented architecture
• XML/XSLT transformations
• .NET platform

Results:

• Management recognized my experience and engagement
• Successfully delivered internal solution
• Solution was later commercialized and sold to external clients

Emergency Services Digital Platform

Bridging Legacy and Modern Without Disruption

Challenge:

Large-scale legacy application with complex business logic and difficult-to-maintain code. Business requires constant new features, but legacy constraints block development. Complete rewrite not feasible - business can't wait months for a big-bang migration.

My Approach:

• Implemented gradual migration strategy in a smart, technically feasible way
• Built seamless integration between old and new systems
• Enabled team to deliver new features without being blocked by legacy code
• Maintained consistent user experience during transition

Technical Stack:

• Angular
• .NET Core
• Modern frontend architecture

Results:

• Unblocked development - team can now deliver new features at modern pace
• Gradual modernization without business disruption
• Strategic approach validated over big-bang rewrite