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
Co-Founder
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: