David K.
Flutter | SpringBoot | Rust
Hybrid applications are the future—and Flutter stands at the very top as the most powerful choice for businesses that want speed, beauty, and cross-platform consistency. I help brands and founders bring these ideas to life. I’m a Full-Stack Developer, mobile apps enthusiast, and Rust backend engineer with a passion for building experiences that feel effortless, polished, and reliable. With 6+ years of hands-on experience, I specialize in crafting high-performance digital products from the ground up. On the mobile side, I deliver smooth, intuitive apps using: Flutter (my top hybrid framework of choice) React Native Native Android (Kotlin) & Native iOS (Swift) On the backend, I build extremely fast, secure, and scalable APIs powered by Rust, using modern frameworks such as: Actix-Web — blazing-fast, production-grade web services Tokio, SeaORM, Serde, JWT, and other high-performance Rust crates Microservices, async systems, and highly optimized architectures I transform client requirements into solutions that are: Beautiful Functional Performant Reliable in production I don’t just code—I deliver experiences. Getting things done, the right way.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $198
Billed in all: $4,656$4.7k
$99 in the last 6 months
Across 20 contracts
Earnings, last 30 days
Skill rankings: Top 25% in Spring Boot
Ranked by MRR among everyone on Upwork with the skill.
- #41Location-Based Service138 freelancers · 🇰🇪 #1Top 30%🇰🇪#1 of 1
- #85Camera259 freelancers · 🇰🇪 #2Top 33%🇰🇪#2 of 3
- #170SQLite680 freelancers · 🇰🇪 #6Top 25%🇰🇪#6 of 10
- #237User Authentication698 freelancers · 🇰🇪 #3Top 34%🇰🇪#3 of 5
- #340Chat & Messaging Software924 freelancers · 🇰🇪 #2Top 37%🇰🇪#2 of 3
- #531Spring Boot2,150 freelancers · 🇰🇪 #6Top 25%🇰🇪#6 of 18
- #543Hybrid App Development1,431 freelancers · 🇰🇪 #3Top 38%🇰🇪#3 of 8
- #824Dart2,324 freelancers · 🇰🇪 #6Top 35%🇰🇪#6 of 11