09/19/2026 updated
100 % available
Senior Desktop Engineer | C#/.NET, Avalonia, Kotlin Android | Industrial & Cross-Platform Systems
Playas, Ecuador
Only remote
BSc Computer ScienceAbout me
18 years building industrial software, 10 as a remote freelancer. Focused on high-performance cross-platform desktop apps (C#/.NET, Avalonia) alongside Android (Kotlin) — layered architecture, full test coverage, fast under real-world data loads. Available now, remote-only.
Android Software DevelopmentC Sharp (Programming Language)Software Design PatternsWindows Presentation FoundationSystems Integration.NET CoreKotlinIndustrial Software
Core stack: C# / .NET (WPF, Avalonia), Kotlin (Android), Java. 18 years shipping production software, split between desktop and Android, with a background in industrial/hardware integration that shapes how I build both.
Desktop — cross-platform native applications (Avalonia, WPF)
Current focus. Two self-directed projects, cross-platform (Windows/Linux/macOS), layered architecture with unit, integration, and E2E test coverage — same discipline as my professional desktop work at Bilky (C#/.NET WPF, strict MVVM, enterprise middleware syncing the Bilky Portal with Sage accounting).
Closed source — happy to walk interested clients through the architecture or share code samples on request.
- LogStation: offline, local-first tool for investigating large technical log files (Android bugreports for now), nothing uploaded anywhere. Makes search and scroll instant on files with millions of lines: indexing pipeline built on System.IO.Pipelines and memory-mapped files, so the source file is never fully loaded into memory. Log formats are parsed declaratively (YAML column profiles, not hardcoded), with a chronological merger for multiple files and a dedicated crash-trace parser for Android bugreports.
- ScriptCast: pipeline generating full audio dramas from a script file. Parses dialogue/scene scripts, orchestrates batch rendering of voice, music, ambience, and SFX through local ComfyUI workflows (Stable Audio, CosyVoice), then mixes and masters with FFmpeg — loudness normalization, environment-specific acoustic filtering (room/hall/cave/phone), punctuation-based pause timing, chaptered output. Fully async, so rendering never blocks the UI.
Same skill set drives my professional work: async I/O layers keeping the UI responsive under heavy load; multi-threaded execution with synchronized state machines for environments where a race condition means a machine keeps running when it shouldn't (CNC plasma tables, industrial kiosks); data integrity checks bridging systems never designed to talk to each other; centralized telemetry for remote debugging.
Android
Kotlin, Jetpack Compose, Koin, Coroutines/Flow, Room, DataStore. Migrated a large Java sales-force-automation app to Kotlin module by module without breaking the data layer; modernized a fleet-tracking app using the Activity Recognition API and background services.
Hardware / industrial integration
Serial protocols, CNC/THC controller integration (G-code parsing, real-time jogging), payment and locker terminal integration for unattended 24/7 kiosks. Why my code defaults to defensive — error recovery isn't an afterthought.
Availability: 100% remote, 10 years as an independent freelancer for clients in Spain, Denmark, the US, and Ecuador. Available now.
Experience
Professional experience10+ years
Freelancer since2016
Languages
EnglishFluentSpanishNative speaker
Project history
I architected and developed Bilky-Sage Connector. It is a high-performance enterprise integration middleware designed to synchronize data between the Bilky Portal and Sage accounting systems.
Highlights:
- Designed the desktop suite using C#/.NET (WPF), implementing a strict MVVM pattern with custom XAML converters and resource-driven styling to ensure a decoupled and scalable codebase.
- Developed an asynchronous processing layer to handle intensive I/O operations between local databases and external APIs, ensuring 100% UI responsiveness during high-volume data transfers.
- Leveraged reactive programming principles and custom enumeration systems to manage application lifecycles, ensuring real-time machine/state feedback and deterministic navigation across management modules.
- Implemented robust business logic for data sanitization and integrity checks, bridging the technical gap between disparate software architectures while maintaining strict synchronization standards.
- Built a centralized telemetry and logging system with categorized messaging and state capturing, streamlining remote debugging and reducing operational downtime during critical sync failures.
I'm currently modernizing their legacy Android apps:
Pedidos Moviles, a massive, data-heavy Sales Force Automation app
- Orchestrated advanced local storage solutions using Room and DataStore, implementing complex database migration strategies across numerous schema versions to guarantee zero data loss.
- Bridged modern mobile workflows with legacy backend infrastructures by optimizing SOAP service communication, handling intricate XML parsing and synchronization protocols.
- Developed a robust network monitoring system utilizing custom listeners to manage data synchronization intelligently in low-connectivity or offline industrial environments.
- Leveraged Kotlin Coroutines and Flow to handle intensive background tasks, ensuring 100% UI responsiveness during heavy I/O operations and real-time data processing.
Localizador Movil, a real-time location and background monitoring app for corporate or fleet environments:
- Implemented the Google Play Services Activity Recognition API to detect and respond to user transitions in real-time for automated telemetry triggers.
- Designed a custom event bus architecture to manage asynchronous communication between background location services and the core application.
- Developed specialized broadcast receivers for activity and location updates, optimized for high reliability and low power consumption in mission-critical tracking scenarios.
- Built a robust permissions manager to orchestrate complex Android security protocols.
I led the modernization of GolfMore, a comprehensive digital platform for the golf industry, centered around a sophisticated self-service kiosk system:
- Engineered a specialized UI framework for high-traffic touch environments, developing custom reactive components to ensure high-performance user interactions and millisecond-precision feedback.
- Orchestrated the integration of diverse hardware ecosystems, including Valina payment terminals and Kerong locker systems, implementing robust asynchronous communication and automated error recovery protocols for unattended 24/7 operations.
- Designed an asynchronous synchronization layer utilizing a custom event bus, enabling real-time UI updates for machine states, rental availability, and complex checkout lifecycles.
- Implemented a sophisticated logic layer for secure checkouts, incorporating Dynamic Voucher validation, VAT-aware pricing, and multi-currency formatting to support global industrial operations.
- Standardized project reliability through rigorous UI testing and automated native installer generation, ensuring reliable behavior in critical field environments.