Senior Android Consultant for Complex Apps & SDKs

Helping companies build, modernize and scale complex Android applications and SDKs using Kotlin, Kotlin Multiplatform, modern architectures and performance-focused engineering.

Currently available for contract engagements

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Architecture Design

Design scalable Android architectures with modular boundaries, clean layering, and long-lifecycle maintainability across complex product growth.

Legacy Modernization

Systematically modernize Android codebases through Java to Kotlin, RxJava to Coroutines/Flow, and modernization tracks that improve delivery reliability without service disruption.

Performance & Reliability

Resolve stability and runtime bottlenecks through connection-state resilience, fault-tolerant synchronization, and background execution hardening for mission-critical Android behavior.

Capabilities

Core Technical Expertise

Android Development

Deliver Kotlin-first Android apps and features across complex products, from greenfield builds to long-lived production systems.

Architecture & Refactoring

Restructure Android codebases into modular architectures and prepare them for Kotlin Multiplatform adoption with clear boundaries and sustainable delivery paths.

SDK Development

Build internal and external Android SDKs for BLE, communications, and security-sensitive integrations with integration-ready APIs.

Migration & Modernization

Lead modernization tracks from Java to Kotlin, RxJava to Coroutines and Flow, XML to Compose, and Android-only modules to shared Kotlin Multiplatform business logic.

Bluetooth / IoT Integration

Implement reliable BLE layers, background services, and synchronization flows for connected-device products where stability is critical.

Kotlin Multiplatform (KMM)

Design shared business logic for Android and iOS with modern multiplatform tooling, keeping platform-specific UX independent and maintainable.

The Technical Engine

Android Android
Kotlin Kotlin
Java Java
Jetpack Compose Jetpack Compose
KMM KMM
Firebase Firebase
GitHub GitHub
Bluetooth Bluetooth

Languages

  • Kotlin
  • Java
  • C++ (JNI)

Frameworks

  • Jetpack Compose
  • Coroutines & Flow
  • Kotlin Multiplatform
  • Dagger / Hilt
  • Koin

Architecture

  • Clean Architecture
  • MVVM / MVI
  • Multi-module
  • SDK Design

KMM Stack

  • Ktor
  • Kermit
  • SQLDelight

Integration

  • Retrofit / OkHttp
  • Room
  • BLE
  • SIP Protocol

CI/CD & Tools

  • GitHub Actions
  • Gradle (KTS)
  • Firebase / Crashlytics
Case Studies

Selected Architecture Projects

BLE SDK Healthcare

Medical Device SDK Architecture

Defined BLE stack design and medical device integration boundaries for Android SDK modules, implementing BLE communication state machines, low-level transport abstraction layers, device lifecycle orchestration, and fault-tolerant synchronization under background execution constraints.

Healthcare KMM Migration

Healthcare SDK Migration to Kotlin Multiplatform

Modernized a healthcare SDK from legacy Java and Rx modules into coroutine-first shared logic, introducing SDK modularization, multiplatform-ready architecture patterns, and explicit migration paths across Java to Kotlin, RxJava to Coroutines/Flow, and Android-only modules toward shared KMM business capabilities.

Communications SDK Reliability

Mission-Critical Communications Layer

Engineered a mission-critical communications layer with MCPTT communication workflows and SIP-based signaling, combining low-level transport abstraction, protocol-level reliability controls, reconnection state machines, and modular SDK architecture under strict background execution constraints.

Logistics Recognition Offline

Logistics Workflow & Recognition Platform

Designed Android logistics systems around offline-first workflows, high-throughput task orchestration, and QR/image-recognition execution pipelines on rugged hardware. The platform applies fault-tolerant synchronization with low-level transport abstraction to maintain consistency across unstable network windows.

Dan Vento portrait
The Consultant

8+ Years of Android Delivery

I work as a senior Android consultant for teams that need experienced technical ownership without the delay or cost of a full-time hire.

My focus is Kotlin-based Android engineering, SDK development, architecture, modernization tracks, Kotlin Multiplatform adoption, BLE integration, and high-risk technical delivery.

I have delivered in healthcare, logistics, industrial, telecommunications, and fintech environments where reliability and clear technical leadership are non-negotiable.

Industries Worked In

HealthcareLogisticsIndustrialTelecommunicationsFintech
Testimonials

Trusted by Teams That Needed Senior Ownership

“I worked along with Dan in the same project as part of the mobile team and I can guarantee he is such an exceptional Senior Android Developer. He demonstrated deep knowledge of Android SDKs as well as best coding practices. He is also an excellent team player with great communication skills. I highly recommend Dan to work in your projects if you need a top notch developer.”

Juanjo Valiño

Senior iOS Lead

“I had the pleasure of working directly with Daniel for 6 months on a Life Sciences project. I found Daniel to be a proactive and conscientious individual. Daniel was able to quickly develop design artefacts and wireframes into a working app, satisfying a number of key use cases. He has a solid working technical knowledge of Android development and Agile / SCRUM development processes.”

Simon Westcott

Creative Lead

“We are very pleased with Daniel's work on the development of our Android application. From the outset, he demonstrated great professionalism and an excellent understanding of our needs. His ability to implement the functionalities we requested was outstanding. Communication throughout the process was clear and effective, which facilitated development and kept us informed at all times.”

José María

Founder and Senior Developer

How I Work

Structured for seamless expert-level integration.

01

B2B Contracts

Structured as an external senior specialist who can integrate quickly with existing product teams.

02

Remote-First

Set up for high-bandwidth collaboration across EU and US time zones with clear written communication.

03

Flexible Durations

Available for short focused interventions, modernization milestones, or longer-term consultant integration.

Let's build something solid.

Ready to discuss your Android architecture, modernization, or SDK requirements? Reach out by email or connect on LinkedIn.

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