Experienced software developer and team leader with a background in mathematics and physics. What energizes me is helping colleagues grow – whether that involves explaining a technical concept or coaching someone in their professional development. What drives me is understanding complex systems AND the people who interact with them. By fostering transparency around the 'why' – the rationale behind a client's request or a specific functionality – I empower my team to grasp the true need. I strongly believe that developers deliver better work when they understand for whom and why they are building something, and therefore I gladly invest time in collaborating with stakeholders to define clear, actionable requirements. I highly value effective and positive collaboration and communication with colleagues. I thrive in teams where we are not only technically strong but also genuinely learn from each other and support each other's growth. Through my experience as a Scrum Master and team leader, I am a strong advocate for retrospectives and open communication to continuously optimize our collaborative processes and overall teamwork.

Tristan Hartskeerl

Experienced software developer and team leader with a background in mathematics and physics. What energizes me is helping colleagues grow – whether that involves explaining a technical concept or coaching someone in their professional development. What drives me is understanding complex systems AND the people who interact with them. By fostering transparency around the 'why' – the rationale behind a client's request or a specific functionality – I empower my team to grasp the true need. I strongly believe that developers deliver better work when they understand for whom and why they are building something, and therefore I gladly invest time in collaborating with stakeholders to define clear, actionable requirements. I highly value effective and positive collaboration and communication with colleagues. I thrive in teams where we are not only technically strong but also genuinely learn from each other and support each other's growth. Through my experience as a Scrum Master and team leader, I am a strong advocate for retrospectives and open communication to continuously optimize our collaborative processes and overall teamwork.

Available to hire

Experienced software developer and team leader with a background in mathematics and physics. What energizes me is helping colleagues grow – whether that involves explaining a technical concept or coaching someone in their professional development. What drives me is understanding complex systems AND the people who interact with them.

By fostering transparency around the ‘why’ – the rationale behind a client’s request or a specific functionality – I empower my team to grasp the true need. I strongly believe that developers deliver better work when they understand for whom and why they are building something, and therefore I gladly invest time in collaborating with stakeholders to define clear, actionable requirements. I highly value effective and positive collaboration and communication with colleagues. I thrive in teams where we are not only technically strong but also genuinely learn from each other and support each other’s growth. Through my experience as a Scrum Master and team leader, I am a strong advocate for retrospectives and open communication to continuously optimize our collaborative processes and overall teamwork.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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Work Experience

Team Lead at Siemens
January 1, 2025 - January 1, 2025
Leading a development team of 3-4 developers with a focus on personal growth and team development. Fulfilled Scrum Master role, including facilitating Scrum ceremonies and improving development processes. Active role in removing impediments and coordinating with other teams and stakeholders. Translating business goals into concrete technical roadmaps and sprint planning. Technical contributions: bridged customer requests and technical implementation by guiding design choices towards clear, maintainable solutions; conducted code reviews with a focus on SOLID principles and testability; implemented unit, integration, and regression tests; provided architectural direction for the SaaS transformation of the Prescan desktop application; implemented CI/CD pipelines; containerized applications with Docker for improved deployment and scalability.
Software Engineer at Siemens
January 1, 2021 - January 1, 2021
Fulfilled developer role in Prescan development. Scrum Master from 2020. Developed core simulation components in C++ and Python. Implemented automated tests. Contributed to architectural decisions for new functionality. Refactored legacy code to modern standards.
Software Developer at Nspyre
January 1, 2015 - January 1, 2015
Projects: SIPMAP development at Shell (2013-2015); FRITS project for Prorail (2012-2013). Developed numerical processing software for seismic data. Implemented training scenarios for train simulation software. Agile development using Scrum methodology.
Software Developer Bioinformatics at GenDx
January 1, 2012 - January 1, 2012
Development of lab management software. Maintenance of DNA analysis software. Implemented laboratory management workflows. Improved DNA analysis algorithms. IT infrastructure management.

Education

MSc. Scientific Computing at Utrecht University
January 1, 2007 - January 1, 2009
BSc. Physics, Astronomy and Mathematics at Utrecht University
January 1, 2003 - January 1, 2007

Qualifications

Professional Scrum Master I (PSM I)
January 1, 2023 - October 27, 2025

Industry Experience

Software & Internet, Professional Services, Computers & Electronics, Manufacturing

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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