Marek Cellar

Background

About Marek Cellar

I have 18 years of experience in IT, specializing in system integration, middleware platforms, and Service-Oriented Architecture (SOA). My career began in technical roles where I designed and developed complex integration solutions, primarily for Slovenská sporiteľňa, a. s, where I worked with Oracle Service Bus and Enterprise Architect. Over time, I transitioned into delivery manager and team leadership roles, overseeing the full delivery of solutions, coordinating across teams, and ensuring that IT projects align with business objectives. I believe in the balance between technical detail, people, and processes — ensuring that the outcomes are not only functional but also sustainable and long-term beneficial. Proven results in delivering complex integration projects in banking and corporate environments Experience in change management, impact analysis, and cross-system coordination Support for agile methodologies, including Agile and Scrum, team development, and mentoring Implementation of technologies such as API, REST, and JSON for efficient data exchange and integration I am always open to connecting with new professionals, solving complex integration challenges, and helping teams deliver high-quality results at scale.