05/12/2026 updated
100 % available
Senior Mobile & Backend Engineer | Android SDK | Go | AI Integrations
Bratislava, Slovakia
Worldwide
Master degree in Computer science AI/ML, cyber-security trainingsAbout me
Senior engineer working across regulated medical, OTT streaming, aviation, and government identity domains. Track record of designing the modular SDKs, and server-driven Ul compositors. Hands-on experience with LLM agents and on-prem model deployment Startup minded and eager to own the product
LLMFlutterAndroid (Software)Android Software DevelopmentAndroid NDKAndroid StudioApplication Integration ArchitectureMobile Application DevelopmentGradleIOS SDKIonicSystems IntegrationAndroid Debug BridgeSwift (Programming Language)Google Firebase
Mobile & Android SDK Development
Expertise in building multimodule Android SDKs using Kotlin, Jetpack Compose, Hilt/Dagger, Coroutines/Flow, Room, Apollo GraphQL, and custom Gradle plugins. Delivery of versioned, distributable SDK artifacts consumed by mobile, TV, and Fire TV applications across regulated and consumer domains.
Backend & BFF Engineering
Proficiency in Go for building HashiCorp plugins and BFF (Backend for Frontend) compositors with server-driven UI rendering. Experience with Protobuf, OpenAPI, and strict typed data contracts enabling clean separation between client and server layers.
AI & LLM Integration
Hands-on experience with LangChain (Anthropic, OpenAI, Google, Ollama), MCP, RAG patterns, and on-premises LLM deployment including Gemma and fine-tuning on domain-specific documents. Development of autonomous research agents and agentic CLI tools.
Data & Telemetry Pipelines
Integration of high-frequency telemetry capture using Bitdrift, Firebase Crashlytics/Performance, WorkManager, and Realm. Design of REST/GraphQL ingestion pipelines feeding downstream intelligence and observability systems.
CI/CD & DevOps
Setup and maintenance of CI/CD pipelines using GitHub Actions, GitLab CI, Azure Pipelines, Fastlane, and Gradle Enterprise. Automation of build, test, and release workflows across large multiteam monorepos.
Platform & Infrastructure as Code
Management of infrastructure and feature flag configurations using Terraform and LaunchDarkly. Use of JFrog Artifactory for artifact distribution and custom Gradle plugins for build tooling.
BLE & Device Sensor Integration
Contribution to BLE-driven CGM and insulin pump telemetry layers for regulated medical device ecosystems, enabling reliable, low-latency device data feeding consumer companion applications.
Multiplatform & Cross-Platform Development
Experience bridging native Android SDKs into Flutter applications using Kotlin, Koin, Retrofit, Coroutines, Flutter, and Chopper. Delivery of multiplatform reach without sacrificing native-grade security, including NFC and eIDAS qualified signing.
iOS Development
iOS parity contribution using Swift, Apollo iOS, Tuist, and CocoaPods. Mirroring of data contracts across Android and iOS clients to ensure contract parity and reduce backend integration risk.
Expertise in building multimodule Android SDKs using Kotlin, Jetpack Compose, Hilt/Dagger, Coroutines/Flow, Room, Apollo GraphQL, and custom Gradle plugins. Delivery of versioned, distributable SDK artifacts consumed by mobile, TV, and Fire TV applications across regulated and consumer domains.
Backend & BFF Engineering
Proficiency in Go for building HashiCorp plugins and BFF (Backend for Frontend) compositors with server-driven UI rendering. Experience with Protobuf, OpenAPI, and strict typed data contracts enabling clean separation between client and server layers.
AI & LLM Integration
Hands-on experience with LangChain (Anthropic, OpenAI, Google, Ollama), MCP, RAG patterns, and on-premises LLM deployment including Gemma and fine-tuning on domain-specific documents. Development of autonomous research agents and agentic CLI tools.
Data & Telemetry Pipelines
Integration of high-frequency telemetry capture using Bitdrift, Firebase Crashlytics/Performance, WorkManager, and Realm. Design of REST/GraphQL ingestion pipelines feeding downstream intelligence and observability systems.
CI/CD & DevOps
Setup and maintenance of CI/CD pipelines using GitHub Actions, GitLab CI, Azure Pipelines, Fastlane, and Gradle Enterprise. Automation of build, test, and release workflows across large multiteam monorepos.
Platform & Infrastructure as Code
Management of infrastructure and feature flag configurations using Terraform and LaunchDarkly. Use of JFrog Artifactory for artifact distribution and custom Gradle plugins for build tooling.
BLE & Device Sensor Integration
Contribution to BLE-driven CGM and insulin pump telemetry layers for regulated medical device ecosystems, enabling reliable, low-latency device data feeding consumer companion applications.
Multiplatform & Cross-Platform Development
Experience bridging native Android SDKs into Flutter applications using Kotlin, Koin, Retrofit, Coroutines, Flutter, and Chopper. Delivery of multiplatform reach without sacrificing native-grade security, including NFC and eIDAS qualified signing.
iOS Development
iOS parity contribution using Swift, Apollo iOS, Tuist, and CocoaPods. Mirroring of data contracts across Android and iOS clients to ensure contract parity and reduce backend integration risk.
Experience
Professional experience10+ years
Freelancer since2014
Languages
GermanBasic knowledgeEnglishFluentSlovakNative speaker
Project history
Contributor inside a large multiteam monorepo for an OTT Mobile and Living-Room Platform. Built lightweight, versioned client SDKs (identity, payments, storage, logging, persistence) with clean public API surfaces consumed by both mobile and TV clients. Integrated high-frequency telemetry capture and Firebase observability enabling realtime ingestion of user state signals. Contributed Go plugins to the page/widget BFF compositor for server-driven UI rendering against strict, typed data contracts. Managed feature flag activations via Terraform and LaunchDarkly, decoupling release cadence from client deployments. Stack: Kotlin, Jetpack Compose, Hilt, KSP, Coroutines, Bitdrift, Firebase, custom Gradle plugins, Fastlane, GitHub Actions, Gradle Enterprise, Go (BFF), Protobuf/OpenAPI, Terraform + LaunchDarkly.
Module contributor inside a regulated multiproduct monorepo. Shipped versioned, isolated SDK artifacts respecting strict cross-module isolation rules under a regulated software workflow for safe consumption by multiple host applications. Contributed to BLE-driven CGM and insulin pump telemetry layers for reliable, low-latency device data feeding the consumer companion application. Advanced a Compose-based design system with Figma token sync and Paparazzi snapshot coverage. Stack: Kotlin, Compose (interop migration), Dagger/Hilt, BLE, JFrog Artifactory, Paparazzi screenshot testing, pitest mutation testing, Dokka, Compose design tokens synced from Figma.
SDK and application engineer for Disney OTT Streaming SDK Suite and TV App. Built distributable Android SDKs (player, ads rendering, network, data layer, feature gating) published via Artifactory, consumed by mobile, TV, and Fire TV applications. Integrated ads, player analytics, and live ads pipelines for unified instrumentation across consumer surfaces. Maintained Terraform for staged and production environments with GitOps-driven feature rollouts. Stack: Kotlin, Jetpack Compose, Hilt, ExoPlayer + IMA, Mux analytics, Apollo/REST, JFrog Artifactory, custom Gradle plugins, Azure Pipelines, Fastlane, Terraform + LaunchDarkly.