Sem Postma
Full Stack-ontwikkelaar at Everdune
North Brabant, Netherlands
Summary
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SeniorSem Postma is a pragmatic full stack developer based in North Brabant with roughly a decade of professional software experience and eight years in hands-on roles. Currently building products at Everdune after a multi-year stint as a DevOps engineer at Superstar, he blends application-level craftsmanship with infrastructure know-how. He cares deeply about front-end polish—fixing FOUC, jank, and content reflow—and enjoys unraveling DLL/promise/callback complexity and anti-patterns. As founder of Echo Sierra Studio he has entrepreneurial experience shipping client-facing solutions and running projects end-to-end. Colleagues rely on him for practical fixes that improve perceived performance and maintainability rather than just adding features. He brings a steady, detail-oriented approach that turns subtle UI/async issues into robust user experiences.
8 years of coding experience
5 years of employment as a software developer
Stackoverflow
1reputation
91reached
0answers
1question
Github Skills (88)
json-schema10
data-validation10
react-component10
json10
aircraft10
preact10
forms10
code-editor9
simulator9
intellij-idea9
npm-package9
traffic9
react9
ace9
static-site9
Programming languages (6)
Github contributions (5)
sempostma/atc-manager-2
Nov 2018 - Nov 2021
Web based air traffic control game. Manage airspace of busy airports like Schiphol or Heathrow in a realistic simulator.
Contributions:38 commits, 55 pushes, 11 branches in 3 years
atcaircraftairspacegameair-traffic-control
sempostma/markdownify-cli
Jun 2019 - Mar 2020
Convert a website to static markdown.
Contributions:6 commits, 2 PRs, 9 pushes in 9 months
markdown
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