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I am a self-taught Software Engineer with a passion for creating efficient and innovative solutions. Over 15 years, I've honed my skills in building complex automation systems and full-stack applications. My journey has been focused on mastering emerging frameworks and modernizing legacy workflows, delivering results even in high-stakes environments. I thrive on challenges and love collaborating with teams to achieve common goals. Let's connect and explore ways we can work together effectively.…I am a self-taught Software Engineer with a passion for creating efficient and innovative solutions. Over 15 years, I've honed my skills in building complex automation systems and full-stack applications. My journey has been focused on mastering emerging frameworks and modernizing legacy workflows, delivering results even in high-stakes environments. I thrive on challenges and love collaborating with teams to achieve common goals. Let's connect and explore ways we can work together effectively.

Marcus Leendert Jongste

Developer, Full Stack Developer, Architect

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I am a self-taught Software Engineer with a passion for creating efficient and innovative solutions. Over 15 years, I've honed my skills in building complex automation systems and full-stack applications. My journey has been focused on mastering emerging frameworks and modernizing legacy workflows, delivering results even in high-stakes environments. I thrive on challenges and love collaborating with teams to achieve common goals. Let's connect and explore ways we can work together effectively.…I am a self-taught Software Engineer with a passion for creating efficient and innovative solutions. Over 15 years, I've honed my skills in building complex automation systems and full-stack applications. My journey has been focused on mastering emerging frameworks and modernizing legacy workflows, delivering results even in high-stakes environments. I thrive on challenges and love collaborating with teams to achieve common goals. Let's connect and explore ways we can work together effectively.

Available to hire

I am a self-taught Software Engineer with a passion for creating efficient and innovative solutions. Over 15 years, I’ve honed my skills in building complex automation systems and full-stack applications. My journey has been focused on mastering emerging frameworks and modernizing legacy workflows, delivering results even in high-stakes environments. I thrive on challenges and love collaborating with teams to achieve common goals. Let’s connect and explore ways we can work together effectively.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Dutch

Fluent

Hungarian

Intermediate

Work Experience

Software Development Engineer at Clario Clinical KFT

April 1, 2025 - Present

Developing customized, high-compliance applications for global clinical trials. Utilizing Node.js and Docker to maintain robust systems within a multi-stack environment. Ensuring extreme data integrity and UI/UX precision for medical research tools.

Automation Designer / Full-Stack Developer at British Telecom (BT)

September 1, 2015 - March 1, 2025

Architected and developed a full-stack platform from the ground up to automate organization-wide workflows. Engineered server-side automations using Java and Groovy, reducing manual expert interventions. Maintained a legacy-to-modern bridge, providing a seamless interface for technical service desks. Delivered critical tools supporting thousands of internal users over a 10-year tenure.

Pre-Delivery Expert / Automation Developer at Nippon Express

January 1, 2009 - January 1, 2015

Pioneered software-based automation for hardware configuration. Built web-based tools for simultaneous automated configuration of multiple devices. Simplified complex technical setup procedures into single-button automation processes.