Hi, I'm Szymon.
Lead Architect | Engineering Manager | Distributed Systems Specialist
I specialize in designing and stabilizing Critical Financial Infrastructure under high-throughput constraints. My focus is on System Reliability, Zero Trust Security, and Legacy Modernization in Tier-1 Banking and Fintech environments.
I don't just write code; I design systems that handle millions of transactions without downtime.
🛠Tech Stack & Expertise
- Core: JVM (Java/Kotlin) Ecosystem mastery, C/C++ background (Memory Management), Polyglot approach (Go/Python for specific subsystems).
- Architecture: Event-Driven Architecture (EDA), Domain-Driven Design (DDD), Microservices (scaling & decomposition).
- Data & Transport: Apache Kafka, RabbitMQ, gRPC, Protocol Buffers.
- Infrastructure: Kubernetes (k8s), Terraform, AWS/GCP, Service Mesh.
- Security: Zero Trust Implementation, OPA (Open Policy Agent), mTLS at scale.
🚀 What I Do ("The Fixer")
My career focuses on solving expensive engineering problems:
- Scaling Engineering Orgs: Successfully grew engineering teams from 4 to 70+ engineers, implementing structure without bureaucracy.
- Tech Debt Reduction: Strategic refactoring of legacy monoliths into scalable microservices while maintaining business continuity.
- Performance Optimization: Tuning high-frequency systems for low latency and high availability (SLA 99.99%).
âš¡ Philosophy
"Code is a liability, functionality is an asset."
I believe in pragmatic engineering. I prefer boring, battle-tested technology for critical paths and reserve innovation for where it gives a competitive edge. My architectural decisions are driven by TCO (Total Cost of Ownership) and Business Value, not hype.
Open for B2B Consulting / Fractional CTO roles in Fintech & Banking.