Rafał Wesołowski
Software engineer building commerce platforms, integrations and infrastructure.
I build and operate software that solves real business problems — from backend systems and commerce integrations to infrastructure, deployment and performance.
What I work on
Software Engineering
Backend systems, APIs, integrations and business applications.
Distributed systems, API design, automated testing, maintainable architecture, performance, and the refactoring and modernisation of legacy code.
E-Commerce
Commerce platforms, integrations and transactional systems.
Shopware, Spryker, Shopify, commerce architecture, ERP integrations, payment flows, order workflows and product data.
DevOps & Infrastructure
Production infrastructure and delivery.
Docker, Ansible, CI/CD, deployment, infrastructure automation, observability, monitoring, performance and load testing, and Linux environments.
AI applications
Chatbots and AI-assisted applications.
Building chatbots and AI applications backed by vector databases.
Architecture
Technical design and pragmatic architecture.
System and software architecture, modernisation, technology evaluation, technical concepts and integration architecture.
What I work with
A selection of the technologies I have actually worked with in projects.
- Backend
- PHP · Symfony · Laravel · Java · Kotlin · Spring Boot · Rust · Python
- Frontend & applications
- TypeScript · Angular · React · Next.js · Dart
- Commerce
- Shopware · Spryker · Shopify
- Testing & performance
- k6
- Infrastructure & data
- Docker · Ansible · Redis · RabbitMQ · MariaDB · PostgreSQL · Grafana · GitHub Actions · Linux · Nginx · Traefik
Talks & workshops
What I learn in projects I pass on through talks and workshops on architecture, testing and maintainable systems.
17 talks and workshops since 2016
Selected talks
About
I work where software engineering, commerce and infrastructure meet. I care about systems that stay understandable, testable and reliable after they reach production.
Positions
valantic CEC Deutschland GmbH
Developer Evangelist
Commerce platforms, integrations and backend systems.
Nexventus GbR
Custom software development and technical consulting.
Have a project worth discussing?
Available for selected software engineering, architecture, DevOps and e-commerce engagements.
Or reach me directly: