Filip Dupanović

Bosnia and Herzegovina

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Summary

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Rockstar

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Top School

Filip Dupanović is a seasoned software engineer with 14 years of experience specializing in frontend architecture, developer productivity, and large-scale refactors, most recently as Staff Engineer at Toggl. He led migrations to modern toolchains (Webpack, monorepo, Flow→TypeScript), introduced CI/CD, Docker and Terraform-based infra for per-PR previews, and cut bundle sizes and rollbacks through pragmatic tooling and types. A frequent open-source contributor, he’s improved developer experience on projects like the popular flow-typed repo and helped polish the Toggl Track browser extension. Known for turning collective engineering externalities into measurable wins, he blends subtle, thoughtful coding with a relentless focus on performance, security and developer ergonomics. Based in Bosnia and Herzegovina, Filip pairs technical depth with a people-first mindset and an unexpected penchant for sharing good jokes.

14 years of coding experience

17 years of employment as a software developer

High School, High School at Gimnazija Dobrinja

Bachelors, Computer Science, Bachelors, Computer Science at University of Buckingham

Stackoverflow

Stats

33,156reputation

8.6mreached

457answers

22questions

Badges

tdd

top-5%

django-models

top-5%

dictionary

top-5%

ubuntu

top-5%

model-view-controller

top-5%

django

top-1%

Github Skills (48)

libstdc10

libc10

javascript10

lib10

flow-control10

libudev10

python10

django10

libdispatch10

work-flow10

flow-typed10

firefox-addon10

chrome-extension10

webpack10

google-chrome-extension10

Programming languages (18)

C#MDXC++RustGoPerlHTMLTypeScript

Github contributions (5)

toggl/track-extension

Apr 2017 - Jan 2020

Toggl Track browser extension for Chrome and Firefox

Role in this project:

Front-end Developer

Contributions:6 reviews, 88 commits, 54 PRs in 2 years 9 months

Contributions summary:Filip primarily focused on fixing minor style issues and addressing JSLint errors within the Toggl Track browser extension. They made changes to the background, popup, settings, and content scripts, as well as the main application library. The commits also addressed several issues and implemented changes to improve interactions within the browser extension and Jira card display. The user also refactored components and updated the build process.

firefoxbrowsertoggljavascriptchrome

flow-typed/flow-typed

Oct 2018 - Nov 2020

A central repository for Flow library definitions

Role in this project:

QA Engineer / Test Automation Engineer

Contributions:2 reviews, 9 commits, 9 PRs in 2 years

Contributions summary:Filip primarily contributed to the repository by adding and modifying type definitions for various npm packages. Their work focused on creating and updating test files (`test_*.js`) and corresponding type definition files (`*.js`) to ensure type safety and provide better developer experience when using these packages. These contributions involved understanding and implementing type annotations for the JavaScript codebases of packages like `slash`, `multimatch`, `@babel/register`, `markdown-table`, `react-hot-loader`, and `webpack`.

libdefsflowtypedefinitionscli

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