Krzysztof Słomka

Kraków, Poland · Nov 2013 — present

• Independent B2B consulting and software development projects focused on backend systems, automation, and custom business platforms.
• Architecture advisory, backend engineering, and DevOps setup for small and mid-size teams, run alongside contract engagements.

Miami, FL, USA (Remote) · Apr 2023 — May 2026

• Led migration of legacy backend services from PHP to NestJS and TypeScript, improving scalability, maintainability, and operational visibility.
• Designed distributed backend services and APIs for high-scale lead-generation and fintech-related platforms.
• Designed platform architecture, observability tooling, event tracking systems, and BigQuery-driven analytics pipelines.
• Built backend debugging workflows using OpenSearch, structured logging, and operational monitoring.
• Improved engineering standards across services: project structure, documentation, logging strategies, best practices.
• Conducted backend performance audits and optimization initiatives, improving reliability and developer experience.

Cracow, Poland (Remote) · Feb 2024 — Nov 2024

• Designed secure backend services and payment-related APIs for fintech and open banking solutions.
• Contributed to a global payment API gateway supporting payment initiation and processing across regions and banking providers.
• Improved distributed payment systems for scalability, low latency, reliability, and fault tolerance.
• Applied CQRS, DDD, and distributed-systems principles in production fintech environments on AWS.

Kraków, Poland (Remote) · Dec 2022 — Apr 2023

• R&D for Ibexa DXP; built REST APIs and backend services for third-party integrations and enterprise extensibility.
• Ran architectural evaluations jointly with product and engineering teams on modernization opportunities.

Kraków, Poland · Jun 2018 — Dec 2022

• Designed distributed architecture for fintech platforms and backend services focused on scalability and high availability.
• Designed microservice-based systems, integration layers, communication contracts, and event-driven solutions.
• Led architectural initiatives across teams: engineering standards, code quality, mentoring, technical documentation.
• Designed and optimized CI/CD pipelines and containerized environments (Jenkins, GitHub Actions, Docker, Kubernetes).

Kraków, Poland · Dec 2015 — Jun 2018

• Built backend services and financial modules for fintech/factoring: settlement, reconciliation, reporting, integrations.
• Designed backend architecture, APIs, async workflows, and integration layers using PHP and Node.js.

Kraków, Poland · Jul 2014 — Dec 2015

• Built high-traffic backend for TVN24biz, a large-scale CMS handling millions of articles and media assets.
• Contributed to an internal CMS built with Symfony, improving editorial workflows and search capabilities.

Kraków, Poland · Oct 2013 — Jul 2014

• Built backend applications and custom web platforms for e-commerce and business-oriented solutions (key2print.pl, wszycyklikamy.pl).

Kraków, Poland · May 2013 — Oct 2013

• Led a small development team for backend and billing systems for enterprise clients.
• Designed and implemented a billing and integration system for Energa S.A.

Kraków, Poland · Mar 2012 — May 2013

• Developed custom web platforms and CMS-based solutions for clients including Royal Canin and Fenix Group.
• Built couponing systems and product-finder applications tailored to client requirements.

Kraków, Poland · 2008 — 2012

• Delivered custom websites and web applications for small businesses and individual clients.
• Managed Linux-based hosting environments and production deployments.