Freelance Mobile App Developer & Consultant

RusuDinu-Ștefan

I design, build and scale mobile products — 45+ released apps used by more than 200,000 people.

0+

Released apps

App Store & Play Store

0K+

Active users

across my applications

0+

Training hours

universities & companies

0M+

Views

on social platforms

As seen on

PRO TVEuronewsDevTalksDevConILikeITDoctor de Bine

Featured project

Food Scanner app icon

Food Scanner

Scan any food barcode and get clear, detailed nutritional information. AI-powered analysis that helps people make healthier choices every day.

Featured on PRO TV and Euronews Romania

Visit scanneralimente.ro

0K+

downloads

0

store rating

0×

national TV features

02

Experience

Dell

Senior Engineer (Contractor)

Microservices and libraries with Kotlin and Spring Boot.

Wolt

Software Engineer

Product development with Kotlin and React.

Tazz by eMAG

Senior Software Engineer

Development and maintenance of the Tazz platform with Java Spring Boot and Angular.

Deutsche Bank Cloud School

Trainer

Training and mentoring students in cloud technologies and software development.

University POLITEHNICA of Bucharest

Teaching Assistant

Teaching assistant for programming and software engineering courses.

CodingShadows

Founder

Custom product development with Java, Flutter, Angular and React.

03

Media appearances

ONIA at ILikeIT

Latest appearance

ONIA at ILikeIT

PRO TV, 2026

I presented the platform powering the Romanian National AI Olympiad — how it works, how many students submitted solutions, and what kinds of solutions it evaluates. Built with my colleagues in under a year, it now supports a national competition whose top performers go on to represent Romania internationally.

ONIA at ILikeIT
ONIA at ILikeITPRO TV, 2026
Food Scanner at Doctor de Bine
Food Scanner at Doctor de BinePRO TV, 2025
Food Scanner at ILikeIT
Food Scanner at ILikeITPRO TV, 2024
Food Scanner at Euronews
Food Scanner at EuronewsEuronews Romania, 2024
Lifeline at ILikeIT
Lifeline at ILikeITPRO TV, 2022
Drivers Data at ILikeIT
Drivers Data at ILikeITPRO TV, 2019

04

Conference talks

DevTalks, Romania, 2026
SpeakerDevTalks · Romania, 2026

592 Builds Later: Features That Survived (And The Ones That Didn't)

A brutally honest walkthrough of what actually happens when you iterate a mobile app in production — features that earned their place, ones that died with a 2-star review, and the feedback patterns that changed the product's direction entirely.

Learn more
DevTalks, Mobile Stage, 2025
SpeakerDevTalks · Mobile Stage, 2025

Scaling Flutter to 100k MAU as a solo developer

The challenges of scaling a Flutter app past 100,000 monthly active users alone — practical strategies for cost management and performance when you're on your own.

Learn more
DevCon, Web & Mobile Con, 2025
SpeakerDevCon · Web & Mobile Con, 2025

Building for Fun, Scaling for Profit: Lessons from a Decade of Indie App Development

Indie app economics aren't taught in courses — you learn them from cloud bills and failed campaigns. A decade of experience distilled: real infrastructure costs, turning free users into assets, and why 'cheap' decisions end up the most expensive.

Learn more

05

Background

Education

  • 2024 – 2026

    MSc Software Engineering

    University POLITEHNICA of Bucharest

  • 2020 – 2024

    BSc Computer Engineering

    University POLITEHNICA of Bucharest

  • 2016 – 2020

    Computer Science

    Tudor Vianu National High School of Computer Science

Volunteering

  • 2025

    Romanian National AI Olympiad

    Infrastructure & DevOps — Kubernetes, RabbitMQ, GitHub Actions

  • 2021 – 2025

    Hardcore Entrepreneur

    Organizer, trainer and jury

  • 2021 – 2022

    InfoEducatie Olympiad

    Jury member and mentor

Achievements

  • 2022

    1st place

    Scientific Session, UPB

  • 2021

    2nd place

    Scientific Session, UPB

  • 2020

    2nd place

    National InfoEducatie

  • 2020

    3rd place

    Online InfoEducatie

  • 2019

    Top 15%

    National InfoEducatie

Let's build something

Have a project idea or want to collaborate? Drop me an email and let's discuss.

I usually respond within 24 hours