Sylvio Mafort
Web Developer
Kobe, Hyogo Prefecture, Japan
Summary
👤
Senior🎓
Top SchoolSylvio Mafort is a pragmatic full-stack Software Engineer with 9 years of experience building web and mobile products using JavaScript, Flutter, Python, Java, Next.js, AWS and SQL. Based in Kobe, Japan, he brings a rare blend of engineering and educational experience—leveraging a background in economics and classroom teaching to communicate complex technical concepts clearly and collaborate across multicultural teams in business-level Japanese. He has delivered large-scale design systems (150+ components) for a major Japanese retailer powering apps with 1M+ downloads and boosted screen-level test coverage from 14% to 72% through automated golden and Patrol tests. Sylvio also builds developer tooling—CLI utilities and a visual diff generator that compares Figma designs to implementations—streamlining QA and improving client satisfaction. Comfortable across the stack and deployment pipelines (Docker, GitHub Actions, ECS/RDS), he pairs rigorous testing practices with practical automation to accelerate delivery and reduce manual handoffs.
9 years of coding experience
1 year of employment as a software developer
Cambridge CAE, English, 200 - C2, Cambridge CAE, English, 200 - C2 at Impact English CollegeBachelor's degree, Economics, Bachelor's degree, Economics at Universidade Federal FluminenseJava and Python Programming Practical Course, Computer Software Engineering, Java and Python Programming Practical Course, Computer Software Engineering at Vocational Training Up Nagata SchoolJapanese Language Course, Japanese Language Course at J国際学院
English, Japanese, Portuguese
Github Skills (20)
firefox-addon10
chrome-extension10
group-project10
discord9
browser-extension9
accessibility9
mongoose9
reader9
mern9
firefox8
darkmode8
together8
chrome8
mongodb7
react6
Programming languages (9)
Github contributions (5)
DaveBFlanikJr/menternshift-frontend
Nov 2023 - Apr 2024
Frontend for the menternshift application
Contributions:10 reviews, 7 PRs, 32 pushes in 5 months
sylfort/100hours-bub
Sep 2022 - Sep 2023
Contributions:110 PRs, 101 pushes, 37 branches in 1 year
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