Available to hire
Hi, I’m Sergio Miranda, a Senior Software Engineer with over 14 years of experience building mobile and web applications. I enjoy turning complex problems into simple, reliable products that people love to use, and I thrive when collaborating with cross-functional teams to ship meaningful software.
I specialize in Android, Kotlin, Java, Flutter, and modern architectures such as MVVM, MVI, and Clean Architecture. I enjoy solving problems, mentoring teammates, and making technology simple and useful for users.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Language
Spanish; Castilian
Fluent
English
Fluent
Work Experience
Senior Android Developer at UNOSQUARE (Client: Weedmaps)
April 1, 2023 - PresentLed the redevelopment of Weedmaps delivery management app for recreational/medical products. Rebuilt a legacy app to align with iOS codebase and implemented modern Android practices. Implemented Clean Architecture, MVVM, and MVI; built UI with Jetpack Compose in Kotlin; added offline-first capabilities with Room; real-time syncing via WebSockets; supported features for delivery routes, timings, pickups, photo/video capture, digital signatures, and product status evaluations; collaborated with iOS teams to ensure cross-platform alignment.
Senior Lead Android Developer at AssureSoft
March 31, 2023 - September 16, 2025Developed a scalable Android application for enterprise clients with robust data management and offline functionality. Implemented Kotlin, Clean Architecture, and MVVM; offline-first via Room; REST API data syncing; collaborated with cross-functional teams.
Founder/Lead Developer at Independent Consultant
April 30, 2023 - September 16, 2025Drove development of a multi-platform app using Flutter, delivering a functional prototype for Android, iOS, web, and desktop. Defined project vision, strategy, and roadmap; selected technologies for cross-platform compatibility; designed key features and managed repositories to ensure milestone delivery.
Senior Lead Developer at TRUEXTEND, Inc.
January 31, 2022 - September 16, 2025Project #1: Video Conferencing and User Management. Built Android app using AWS Chime, Cognito, Amplify; external camera integration; applied Jetpack, MVVM, and Clean Architecture to reduce latency in video streams by 25%.
Senior Lead Developer at TRUEXTEND, Inc.
January 31, 2022 - September 16, 2025Project #2: Online Education Platform (planning). Conducted market research, requirements gathering, and wireframing for an Android education app focused on the legal industry.
Android Developer at Encora Bolivia
February 28, 2021 - September 16, 2025Farm Management App with geopositioning and offline data synchronization. Implemented GPS-based features to map productive/non-productive farm lots; asynchronous data/image sync; push notifications to support offline operation.
Full Stack Developer at PIL Andina S.A.
October 31, 2019 - September 16, 2025Backend Java/Spring projects for vehicle registration and product distribution; Spring Boot middleware connecting mobile apps and web pages; offline-capable pre-sale/distribution app with real-time Firebase updates; data warehousing React app with Postgres; product reservations on Android/iOS with real-time stock data.
Independent Consultant at Freelance
December 31, 2017 - September 16, 2025Custom applications and websites for SMEs; end-to-end project lifecycles with ongoing support; technologies included Android, PHP (Symfony, Laravel), MySQL.
Mobile Developer at IVENTIVA
September 30, 2014 - September 16, 2025Cross-platform app for construction materials tracking (Titanium); photo capture for tool wear tracking to improve inventory accuracy.
Software Developer Mobile at Elicere, Inc.
January 31, 2014 - September 16, 2025Event reservation app with secure payment integration; infant safety tracking with real-time monitoring; firearms purchase app with secure inventory.
Software Developer Mobile at LYSoft
February 28, 2013 - September 16, 2025AR Magazine app with OpenCV; AR tourism app for Cochabamba; Scrum Event app (cross-platform).
Chief Systems Officer at La Francesa
December 31, 2010 - September 16, 2025Led systems department, streamlined operations across administration, production, and accounting; managed databases and implemented new workflows.
Delphi Developer at Soluciones Informaticas
November 30, 2009 - September 16, 2025Financial application automating interest calculations; Delphi, Oracle, PL/SQL; system design for financial tooling.
Senior Android Developer at UNOSQUARE (Client: Weedmaps)
April 1, 2023 - PresentLed the redevelopment of a delivery management app for Weedmaps, aligning with iOS codebase for cross-platform consistency; implemented Clean Architecture, MVVM, and MVI; built UI with Jetpack Compose in Kotlin; added offline-first storage with Room; real-time syncing via WebSockets and REST APIs; features included photo/video capture, digital signatures, and product status evaluations; collaborated with iOS teams to ensure feature parity and high-quality reviews.
Senior Lead Android Developer at AssureSoft
March 1, 2023 - September 16, 2025Developed a scalable Android application for enterprise clients, focusing on robust data management and offline functionality; designed with Kotlin, Clean Architecture, and MVVM; built offline-first capabilities with Room and data synchronization via REST APIs; collaborated with cross-functional teams to deliver features on time.
Founder/Lead Developer at Independent Consultant
April 1, 2023 - September 16, 2025Drove the development of a multi-platform startup app using Flutter, delivering a functional prototype for Android, iOS, web, and desktop; defined project vision, strategy, and roadmap; designed and implemented key features; managed repositories and milestones; collaborated with designers and stakeholders.
Senior Lead Developer at TRUEXTEND, Inc.
January 1, 2022 - September 16, 2025Designed and developed a high-quality Android app for video conferencing and user management using AWS Chime, Cognito, Amplify, and related services; improved video latency by ~25% and integrated external camera support via Chime APIs; applied Jetpack, MVVM, and Clean Architecture for scalable code.
Android Developer at Encora Bolivia
February 1, 2021 - September 16, 2025Farm management app with geopositioning and offline data synchronization; implemented GPS-based mapping of productive/non-productive farm lots; built asynchronous data and image syncing with push notifications; supported offline operation.
Full Stack Developer at PIL Andina S.A.
October 1, 2019 - September 16, 2025Backend for vehicle registration and product sales/distribution; Spring, MVC, Java, MySQL; middleware for multi-platform integration with Firebase; offline-capable Pre-Sale and Distribution mobile app with real-time Firebase updates; data warehousing React app; product reservation mobile app.
Freelance Independent Consultant at Independent Consultant
December 1, 2017 - September 16, 2025Developed tailored applications and websites for SMEs; managed end-to-end project lifecycles and provided ongoing support.
Mobile Developer at IVENTIVA
September 1, 2014 - September 16, 2025Construction materials tracking app; cross-platform development using Titanium; implemented photo capture for tool wear tracking to improve inventory accuracy.
Software Developer Mobile at Elicere, Inc.
January 1, 2014 - September 16, 2025Event reservation app with secure payment integration; infant safety tracking; firearms purchase app.
Software Developer Mobile at LYSoft
February 1, 2013 - September 16, 2025Augmented reality apps: AR Magazine and AR Tourism; Scrum Event App; integration with GPS and real-time data.
Chief Systems Officer at La Francesa
December 1, 2010 - September 16, 2025Led systems department, streamlining operations in administration, production, and accounting; managed databases and implemented new workflows.
Delphi Developer at Soluciones Informaticas
November 1, 2009 - September 16, 2025Developed a financial application using Delphi and Oracle; PL/SQL; system design for financial automation.
Senior Android Developer at UNOSQUARE (Client: Weedmaps)
April 1, 2023 - PresentLed the redevelopment of a delivery management app for Weedmaps, aligning Android with iOS codebase and implementing modern Android practices. Redesigned using Clean Architecture, MVVM, and MVI; built UI with Jetpack Compose in 100% Kotlin; implemented offline-first functionality with Room and real-time syncing via WebSockets and REST APIs. Included features like photo/video capture, digital signatures, and product status evaluations; collaborated with iOS teams for feature alignment.
Senior Lead Android Developer at AssureSoft
March 31, 2023 - September 16, 2025Developed a scalable Android application for enterprise clients, focusing on robust data management and offline functionality. Designed with Kotlin, Clean Architecture, and MVVM; implemented offline-first capabilities with Room and REST API data syncing; collaborated with cross-functional teams to deliver features on time.
Founder/Lead Developer at Independent Consultant
April 30, 2023 - September 16, 2025Drove the development of a multi-platform startup app using Flutter, delivering a functional prototype for Android, iOS, web, and desktop. Defined project vision, strategy, and roadmap; selected technologies for cross-platform compatibility; designed and implemented key features and managed code repositories for milestone delivery.
Senior Lead Developer at TRUEXTEND, Inc.
January 31, 2022 - September 16, 2025Designed and developed a high-quality Android app for video conferencing and user management, leveraging AWS Chime, Cognito, Amplify, and other services. Implemented external camera integration via APIs/SDKs; applied Jetpack, MVVM, and Clean Architecture for scalable, maintainable code.
Android Developer at Encora Bolivia
February 28, 2021 - September 16, 2025Developed a farm management app with geopositioning and offline data synchronization. Implemented GPS-based features for land management, and asynchronous data/image sync with push notifications to support offline operation.
Full Stack Developer at PIL Andina S.A.
October 31, 2019 - September 16, 2025Backend Java Spring-based solutions for vehicle registration and product control; created middleware for multi-platform integration; enabled real-time Firebase updates and offline support.
Freelance Independent Consultant at Independent Consultant
December 31, 2017 - September 16, 2025Developed tailored Android/iOS/web apps for SMEs; managed end-to-end lifecycles and provided ongoing support, delivering value to local businesses.
Mobile Developer at IVENTIVA
September 30, 2014 - September 16, 2025Cross-platform app (Titanium) for construction materials tracking; implemented photo capture for tool wear tracking and inventory accuracy.
Software Developer Mobile at Elicere, Inc.
January 31, 2014 - September 16, 2025Event reservation app with secure payment integration; infant safety tracking and other mobile projects including Bluetooth-based tracking and secure inventory systems.
Software Developer Mobile at LYSoft
February 28, 2013 - September 16, 2025AR magazine app using OpenCV; AR tourism app with GPS integration; Scrum event app showcasing schedules and speakers.
Chief Systems Officer at La Francesa
December 31, 2010 - September 16, 2025Led systems department, streamlining operations across administration, production, and accounting; managed databases and implemented new workflows for efficiency.
Delphi Developer at Soluciones Informaticas
November 30, 2009 - September 16, 2025Developed a financial application automating interest calculations; PL/SQL and Oracle; system design for financial software.
Senior Lead Android Developer at Unosquare
April 1, 2023 - PresentRebuilt a legacy Android app using Kotlin and Jetpack Compose, improving usability and reliability for 30,000 Android users. Ensured offline functionality with Room and real-time updates via REST APIs. Enhanced delivery and product tracking using MVVM and MVI patterns. Supported iOS team for 45,000 users and cross-platform alignment for 5,000 stores.
Senior Lead Android Developer at Trueforce
March 31, 2023 - October 10, 2025Developed a hospital management app using Kotlin and MVVM, enabling offline access to patient data, appointments, treatments, and medications for 77,000 users in 10,000 clinics. Allowed specialists to guide surgeries with a new feature using REST APIs and live video, handling 50 calls per day, each lasting 8 hours. Created an app for Android, iOS, and web with Flutter and Firebase, making it easier for users to access information and products. Improved app performance and user experience using Jetpack libraries, making routine tasks easier for medical staff.
Senior Lead Developer at Tru Extend, Inc.
January 31, 2022 - October 10, 2025Built a nearshore model with R&D centers in Latin America to extend engineering capabilities for businesses in North America. Gave over 10,000 students in underserved countries access to streaming lessons by developing an Android app using Kotlin and Jetpack. Improved connectivity reliability and reduced latency by 25% by integrating AWS Cognito and AWS Chime for video and user management. Built maintainable and scalable code with MVVM and Clean Architecture, enabling easier feature updates and onboarding for new users. Added external camera integration and video streaming using AWS Kinesis Video Streams and APIs, enhancing the learning experience.
Android Developer at Encora, Inc.
January 1, 2021 - October 10, 2025Developed Android apps using Kotlin and MVVM; included GPS, push notifications, and Azure integration within a Clean Architecture.
Fullstack Engineer at Pil Andina S.A.
December 31, 2019 - October 10, 2025Developed full-stack solutions using Java, Kotlin, Spring, MVC/MVVM; worked on Android, iOS, and web components.
Mobile Developer at IVENTIVA
December 31, 2017 - October 10, 2025Mobile development across Android and iOS with PHP/Symfony/Laravel on backend; contributed to multiple mobile projects over 2014–2017.
Software Developer Mobile at Elicere, Inc.
December 31, 2014 - October 10, 2025Mobile software development focusing on Android and iOS ecosystems with cross-functional collaboration.
Mobile Developer at LY Soft
December 31, 2013 - October 10, 2025Mobile development across Android and iOS platforms with GPS and API integrations.
Senior Lead Android Developer at Unosquare
April 1, 2023 - PresentRebuilt a legacy Android app using Kotlin and Jetpack Compose, improving usability and reliability for 30,000+ Android users. Enabled offline support with Room and real-time updates via REST APIs. Improved delivery and product tracking using MVVM and MVI patterns, making the app faster and easier to use. Supported iOS team for 45,000 users and aligned across 5,000 stores for cross-platform consistency.
Senior Lead Android Developer at Trueforce
March 1, 2023 - October 10, 2025Developed a hospital management app using Kotlin and MVVM, enabling offline access to patient data, appointments, treatments, and medications for 77,000 users in 10,000 clinics. Guided specialists with a new feature using REST APIs and live video, handling 50 calls per day, each lasting 8 hours.
Senior Lead Android Developer at True Extend
January 1, 2022 - October 10, 2025Provided access to streaming lessons for over 10,000 students in underserved countries by developing an Android app with Kotlin and Jetpack; integrated AWS Cognito and Chime for video and user management; built maintainable code with MVVM and Clean Architecture; added external camera integration and video streaming via AWS Kinesis Video Streams.
Android Developer at Encora, Inc.
January 1, 2021 - October 10, 2025Developed mobile solutions for Android using Kotlin and MVVM with Clean Architecture; implemented GPS, push notifications; collaborated with Azure cloud and REST APIs; contributed to maintainable, testable code and scalable app features.
Full Stack Engineer at PIL Andina S.A.
January 1, 2019 - October 10, 2025Full-stack mobile development with Kotlin/Java, Spring/Spring Boot, MVC/MVVM; worked on Android and back-end components, enabling integrated features and robust data flows.
Mobile Developer at IVENTA
January 1, 2017 - October 10, 2025Mobile development across Android and iOS; contributed to backend integration using PHP, Symfony/Laravel; built features for mobile applications and improved app performance.
Software Developer Mobile at Elicere, Inc.
January 1, 2014 - October 10, 2025Mobile development for Android and iOS using Kotlin/Swift; collaborated on feature development and performance optimizations.
Mobile Developer at LY Soft
January 1, 2013 - October 10, 2025Mobile development across Android and iOS; worked with OpenCV, GPS integration, and MVVM patterns to deliver robust mobile features.
Education
Master of Business Administration (MBA) at European Business School
April 1, 2022 - July 1, 2023Bachelor’s degree in Computer Software Engineering at UCATEC
January 1, 2010 - January 1, 2014Análisis Sistemas Informáticos at CATEC
January 1, 2004 - January 1, 2006MBA (Master of Business Administration) at European Business School
April 1, 2022 - July 1, 2023Bachelor’s degree in Computer Software Engineering at UCATEC
January 1, 2010 - January 1, 2014Análisis Sistemas Informáticos at CATEC
January 1, 2004 - January 1, 2006Master of Business Administration - MBA at European Business School
April 1, 2022 - July 31, 2023Bachelor’s degree, Computer Software Engineering at UCATEC
January 1, 2010 - December 31, 2014Master's Degree at European Business School
January 11, 2030 - October 10, 2025Bachelor's Degree at UCATEC
January 11, 2030 - October 10, 2025Master’s Degree in Business Administration and Project Management at European Business School, Spain
January 11, 2030 - October 10, 2025Bachelor’s Degree in Computer Software Engineering at UCATEC, Bolivia
January 11, 2030 - October 10, 2025Qualifications
Curso de Flutter - Platzi
January 11, 2030 - September 16, 2025Curso de Flutter - Platzi
January 11, 2030 - September 16, 2025Curso de Flutter - Platzi
January 11, 2030 - September 16, 2025Industry Experience
Software & Internet, Education, Agriculture & Mining, Retail, Professional Services, Transportation & Logistics, Computers & Electronics
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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