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Karol Siczek

@karolsiczek

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Technical lead at DNA Technology building a three-agent AI pipeline now used by a five-engineer payments team.

Poland

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At DNA Technology, I’m the technical lead for merchant onboarding on a multi-country payments platform. I own technical decisions, code quality, delivery, and how our team works with AI.

I built a three-agent development pipeline using Kiro CLI: an orchestrator runs JIRA tasks, a developer agent implements them, and an adversarial reviewer checks for provable bugs. It delivered 77 merge requests across 12 services and is now the default way of working for our five-engineer team.

Earlier, I architected commerce and payment systems at HYCOM S.A. and AMG.net, including a T-Mobile Germany e-commerce platform. At AMG.net, I designed and built solutions such as an online shop, an NFC payment integration, and a video-on-demand platform with online payment and licensing integration.

Experience

Work history, roles, and key accomplishments

Current

Technical Lead

Current

DNA Technology

Jun 2026 - Present (5 months)

Technical lead of the merchant onboarding domain on a multi-country payment platform, owning technical decisions, code quality, and delivery. Scaled an AI agent pipeline to the whole team, making it the default way of developing.

Java Spring Boot AWS Kiro CLI Multi agent orchestration Adversarial Code Review Jira Technical Leadership Software Architecture CI CD Datadog

Backend Engineer

DNA Technology

Feb 2023 - May 2026 (3 years 3 months)

Backend engineer on merchant onboarding (KYC, risk assessment, contract management) across 25+ repositories. Architected a unified product catalog, designed a REST Data API, integrated e-signatures, and automated dependency updates.

Java Spring Boot REST API Design Microservices AWS AppConfig Renovations Feature Toggles NodeJS AWS ECS Lambda Docusign Penneo

Senior Software Architect

HYCOM S.A.

Sep 2015 - Oct 2021 (6 years 1 month)

Senior software architect for a multi-purpose e-commerce solution for T-Mobile Germany, leading a Scrum team, acting as application-level architect for 2-3 teams, and serving as technical product owner for non-functional requirements.

Software Architecture Technical Leadership Scrum Non Functional Requirements Ecommerce

IT Architect

AMG.net

Jan 2012 - Jan 2015 (3 years)

Designed and built commerce and payment solutions for a Polish telecom operator, including an online shop, shared-account feature, NFC payment integration, and video-on-demand platform. Led teams of 3-6 developers.

Software Architecture Java CXF Camel Akka Payment Integration Team Leadership