Hybrid skill set
I bridge product strategy, UX collaboration, and hands-on engineering to help teams deliver end-to-end web experiences.
Engineering becomes meaningful when it solves human problems.
I'm Leonardo Jansen, a web engineer focused on translating complex requirements into clear, delightful experiences.
10+
Years shipping digital products
35
Shipped Next.js launches
20
Workshops facilitated
Crafted with intent
My process mixes rapid prototyping, rigorous code quality, and user-first storytelling to ensure the product vision remains intact.
Continuous learning
From performance budgets to accessibility best practices, I keep iterating on my toolkit so each project benefits from the latest capabilities.
Principles I work by
- Lead with empathy for users and teammates.
- Prefer clarity over cleverness in both code and communication.
- Ship iteratively, measure outcomes, and keep improving.
Trajectory
- 2014 - 2017
Foundations in front-end craft
Started as a UI developer, mastering HTML, CSS, and the principles of accessible design.
- 2018 - 2021
Product engineering in SaaS
Led feature squads, integrating design systems, analytics, and marketing automation.
- 2022 - Today
Next.js specialist for high-growth teams
Partnering with startups and enterprises to deliver resilient web applications at scale.
Let's build something users remember
Share your product vision and I’ll help outline the path from discovery to launch.
Schedule a talk