Hi, I'm Dario.
Senior Android and Flutter engineer, 14+ years of experience. Built apps and features used by millions of users.
Companies I've shipped for
Mousike
Lighten
Zippe
Cached
Ligence Medical AI
Swift Medical
Schedulicity
DECODE
PetrolPrices
Ericsson Nikola Tesla
BellabeatMillions
of users on features I shipped at Reddit
1,100+
pull requests over 14 years
250k+
lines of code written
Thousands
of tests written by hand
Services
Pick the one that matches where your product is. Every engagement starts with a 30-minute call and a written scope.
For startups
I take your idea or Figma designs to a released Android or Flutter app as the only engineer you need. Fixed scope, weekly demos, store release included.
For product teams
Drop me into your codebase for a few months. I ship features, SDKs and migrations in your process, with tests, and leave the code better than I found it.
Proof: Reddit, Contentsquare, Swift Medical, Schedulicity
For apps in trouble
Crashing, late, or unshippable? A one-to-two week audit of crashes, ANRs, leaks and architecture, then a fixed plan to make it shippable.
Proof: PetrolPrices, Schedulicity, Cached
Work
Apps built solo for startups, features shipped inside large teams, and apps brought back from the brink.
Senior engineer on the team
Shipped in-feed onboarding, keyword following and a rebuilt share sheet in the Reddit Android app.
Read the case study →
Senior engineer on the team
Improved WebView tracking, built the Survey feature and resolved client issues worth more than $500k ARR.
Read the case study →
New app build
Built the whole Flutter web frontend for booking artists, venues, instruments and equipment, from Figma to production, AI-assisted end to end.
Read the case study →
New app build
Delivered Lighten's MVP as the single developer: AI chat with text, voice and images, onboarding, forms and tasks.
Read the case study →
New app build
Built the whole Uber-like Android app from Figma designs in about three months.
Read the case study →
Rescue and stabilise
Took over an unfinished, unstable app and shipped it to the Play Store on schedule.
Read the case study →
Senior engineer on the team
Fixed 50+ crashes and leaks in the consumer app, then led a team of four on the new Business app with 400+ automated tests.
Read the case study →
Rescue and stabilise
Stabilised a popular UK fuel-price app and shipped new features on top of the fixed base.
Read the case study →
Senior engineer on the team
Reworked the sync framework to run an order of magnitude faster and modernised a legacy codebase.
Read the case study →
How I work
You always know what is being built, what it costs, and what you get at the end.
01
You describe the product and the constraints. I tell you what I would do and whether I am the right fit.
02
Within a few days: what gets built, in what order, and what it costs. No surprises later.
03
A demo and a test build every week. You see progress on your phone, not in a status report.
04
Store listings, CI, tests and documentation, so the next engineer (or you) can carry on without me.
Typically 2 to 6 months, milestone invoicing
One senior engineer takes the product from designs to the store, end to end.
Best for
Startups with a design and a deadline
2 to 5 days a week, minimum one month, weekly invoicing
Your tools, your process, your code review. I ship inside your team.
Best for
Product teams that need senior Android or Flutter capacity
1 to 2 weeks, fixed price
A written report on crashes, leaks, architecture and performance, plus a stabilisation plan you can act on with or without me.
Best for
Apps that crash, lag, or cannot ship
AI workflow
I build with Claude Code. It drafts the code and the tests; I own the architecture, review every change, and nothing merges until the tests pass. You get working increments sooner, with more tests and documentation than a hand-typed codebase usually gets.
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02
03
04
Only with your OK
AI touches your code only if you agree, and only with the tools you approve.
Every line reviewed
I read and answer for every change before it merges.
Tests gate every change
Nothing merges with a failing test.
Your repo, your process
The rules and skills live in your repository, so your team keeps them.
Worked example
Mousike is a music event booking platform, in production. I built the Flutter web frontend; the backend is a colleague's Django API. Google Antigravity from February, Claude Code from May.
An 18-month build, shipped in about six months
Recommendations
During his time on the team, he led and contributed to projects across Sharing, Onboarding, and Auth, consistently delivering high-quality work on time and within his estimates. … Dario is proactive, thoughtful, and dependable. He flags issues when he sees them, brings forward new ideas, and communicates effectively across engineering and cross-functional partners.
Sean Sassenrath
Engineering Manager, Growth Onboarding, Reddit
Referral letter
I’m happy to recommend Dario Milicic.
Dario was on the Growth Onboarding team for over a year as one of our core Android contributors. During his time on the team, he led and contributed to projects across Sharing, Onboarding, and Auth, consistently delivering high-quality work on time and within his estimates.
One thing I especially appreciated about Dario was his willingness to go beyond the immediate project work. He built mechanisms that helped the team test onboarding changes more quickly, saving valuable engineering time and improving our overall development velocity. He was also a major contributor to analytics improvements, helping the team better understand user behavior and measure the impact of our work. In addition, he proactively proposed and designed a retry mechanism to ensure important signals captured during the onboarding flow would not be lost when submission failures occurred.
Dario is proactive, thoughtful, and dependable. He flags issues when he sees them, brings forward new ideas, and communicates effectively across engineering and cross-functional partners. He is someone the team could count on to execute consistently while also thinking about how to improve the systems and workflows around him.
I would highly recommend Dario as a positive addition to any team.
Although he was remote the entire time, he was responsive over messenger, attended all of our working meetings, and actively participated in grooming calls. … Dario took ownership of several different features on the app and spearheaded the analytical tagging. … any team that works with him will get a very engaged and vocal developer.
Yolanda Hsiao
Scrum master on a year-long Android project, Johnson & Johnson
LinkedIn recommendation, Dec 2018
As Dario's scrummaster on a year+ Android project, I found working with Dario very easy. Although he was remote the entire time, he was responsive over messenger, attended all of our working meetings, and actively participated in grooming calls. It was always very clear to the rest of the team what Dario was doing.
Technically speaking, Dario took ownership of several different features on the app and spearheaded the analytical tagging.
Unfortunately, we had a change in the business scope and resourcing on the portfolio so Dario will no longer be part of it. However, I hope to work with Dario again in the future and know that any team that works with him will get a very engaged and vocal developer.
About
Senior Android & Flutter Engineer
Senior Android and Flutter engineer in Zagreb, Croatia, working remotely with US and EU teams since 2012. Fourteen-plus years across healthcare, fintech, e-commerce and consumer apps: architect and lead on Schedulicity's business app, SDK engineering at Contentsquare, features for millions of users at Reddit, and whole apps built alone for startups. I wrote the Android Clean Architecture guide that Android Weekly featured, and I still ship with tests on everything.
Senior Flutter Engineer · Feb 2026 – Aug 2026
Built the Flutter web frontend of a music event booking platform, AI-assisted end to end.
Case study →Senior Android Engineer · Apr 2025 – Jul 2026
Onboarding, sharing and growth features for millions of users.
Case study →Senior Android SDK Engineer · May 2024 – Mar 2025
SDK WebView tracking, the Survey feature, client issues worth more than $500k ARR.
Case study →Senior Flutter Developer · Mar 2024 – Sep 2024
Built the AI family-assistant MVP as the single developer.
Case study →Senior Android Engineer · Dec 2023 – Feb 2024
Built the whole Uber-like app from Figma designs.
Case study →Senior Android Contractor · Jun 2023 – Aug 2023
Rescued an unstable app weeks before its release.
Case study →Senior Android Engineer · Dec 2022 – Feb 2023
BLE link to an ultrasound with a live heart image feed; server-side neural network protocol.
Senior Android Engineer · Mar 2022 – Nov 2023
New features, deep linking, and a sync rework an order of magnitude faster.
Case study →Senior Android Engineer · Feb 2019 – Mar 2022
Architect and lead on the Business app; stabilised the Consumer app; 400+ tests.
Case study →Senior Android Engineer · Nov 2017 – Dec 2018
Reusable dynamic UI, custom views and animations; Clean Architecture and TDD.
Android Consultant · Mar 2017 – Apr 2017
BLE interface and custom controls for a light node.
Android Consultant · Dec 2016 – Mar 2017
Crash-free users from about 90% to 99.6%.
Case study →Android Consultant · Jul 2015 – Oct 2015
Pioneered Clean Architecture for their Android app (featured on Android Weekly); BLE sync with a medical device.
Android Developer · Feb 2015 – Jun 2015
Leaf wearable: BLE sync with the device and REST sync with the server.
Writing
Medium
The widely read walkthrough of Clean Architecture on Android, featured in Android Weekly.
Read on Medium ↗
Medium
A cross-platform game with an unbeatable minimax opponent, built and deployed with Flutter and Firebase.
Read on Medium ↗
Medium
How the previous version of this site was built as a Flutter Web app with a pan-and-zoom canvas.
Read on Medium ↗
More on the blog: blog.dmilicic.com
Contact
Book a call, or send a few lines and I'll reply within one business day.
Zagreb, Croatia. CET, overlapping EU and US-East mornings.
