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I'm a freelance blockchain and trading systems developer focused on Solana, DeFi, and Android apps. I design and deploy automated trading bots, build scalable backends, and integrate DEX APIs to deliver real-time price tracking and execution. With a background in Java, Python, Go, and Rust, I craft high-performance, production-ready solutions and love turning complex crypto ideas into robust software for traders and developers alike.…I'm a freelance blockchain and trading systems developer focused on Solana, DeFi, and Android apps. I design and deploy automated trading bots, build scalable backends, and integrate DEX APIs to deliver real-time price tracking and execution. With a background in Java, Python, Go, and Rust, I craft high-performance, production-ready solutions and love turning complex crypto ideas into robust software for traders and developers alike.

Valian Trao

Blockchain Developer, Web Developer, App Developer, +4

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I'm a freelance blockchain and trading systems developer focused on Solana, DeFi, and Android apps. I design and deploy automated trading bots, build scalable backends, and integrate DEX APIs to deliver real-time price tracking and execution. With a background in Java, Python, Go, and Rust, I craft high-performance, production-ready solutions and love turning complex crypto ideas into robust software for traders and developers alike.…I'm a freelance blockchain and trading systems developer focused on Solana, DeFi, and Android apps. I design and deploy automated trading bots, build scalable backends, and integrate DEX APIs to deliver real-time price tracking and execution. With a background in Java, Python, Go, and Rust, I craft high-performance, production-ready solutions and love turning complex crypto ideas into robust software for traders and developers alike.

Available to hire

I’m a freelance blockchain and trading systems developer focused on Solana, DeFi, and Android apps. I design and deploy automated trading bots, build scalable backends, and integrate DEX APIs to deliver real-time price tracking and execution.

With a background in Java, Python, Go, and Rust, I craft high-performance, production-ready solutions and love turning complex crypto ideas into robust software for traders and developers alike.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Android Application Developer at Self-Employed (Freelance)

January 1, 2020 - Present

Developed and maintained multiple Android applications with a focus on performance, user experience, and clean architecture. Implemented real-time data synchronization and local databases with WorkManager; integrated third-party APIs; published apps on Google Play with positive user ratings and reviews.

Software Developer | Blockchain & Trading Systems Specialist at Self-Employed (Freelance)

January 1, 2021 - Present

Architected and deployed automated trading bots for cross-DEX arbitrage across Raydium, Meteora, and Whirlpool, with real-time execution and price optimization. Engineered high-frequency arbitrage detection systems processing live market data with sub-second latency. Built scalable trading infrastructure on PostgreSQL and Node.js with integrated technical analysis, enabling 15-minute trading intervals and automated risk controls; implemented Solana-based back-end services and DEX integrations.

Freelance Blockchain & Trading Systems Developer at Self-Employed

January 1, 2021 - Present

Designed and deployed Solana-based automated trading bots with multi-DEX arbitrage across Raydium, Meteora, Whirlpool, and Jupiter Aggregator; built real-time execution and price-optimization engine. Engineered high-frequency arbitrage detection systems processing live market data with sub-second latency, delivering production-ready performance. Built scalable trading infrastructure on PostgreSQL and Node.js supporting 15-minute trading intervals with integrated technical-analysis. Implemented Pine Script trading strategies for TradingView with advanced indicators and automated signal generation; integrated TradingView API and alerting/monitoring loop. Created real-time market monitoring across multiple DEXes with backtesting across 1000+ parameter combinations; designed database schemas with complex query optimization. Reduced latency with Rust-based backends and ensured uptime with robust logging and error handling. Architected end-to-end workflow from data ingestion to order executi

Android App Developer at Self-Employed

January 1, 2020 - Present

Developed and maintained multiple Android applications with focus on performance and clean architecture. Implemented real-time data synchronization and offline storage (Room/WorkManager); integrated third-party APIs and payment gateways. Published apps on Google Play with positive user ratings and regular updates.