Amar is available for hire
Hire AmarAmar Idrizovic
Verified Expert in Engineering
Apps Developer
Sarajevo, Federation of Bosnia and Herzegovina, Bosnia and Herzegovina
Toptal member since November 6, 2015
Bio
Amar is a senior engineer and tech lead with 10+ years of experience building production systems at scale for Volvo, Reddit, Goldman Sachs, and Mercedes-Benz, primarily in Android. He recently moved into AI product development, where he built a multi-agent platform through his studio, 3 specialized Claude agents for product shaping, staff-level execution, and quality assurance, automating end-to-end workflow across codebases. He served for 5+ years as the Toptal Community Leader for Sarajevo.
Portfolio
Adiana Ayes
Full-stack Development, Platforms, Third-party APIs, API Integration...
GiBud
Next.js, Technical Leadership, Architecture, Code Architecture, Code Review...
Volvo Cars Corporation
Android, Kotlin, Jetpack Compose, Architecture, Mobile Apps...
Experience
- Mobile Apps - 10 years
- Apps - 10 years
- Android - 9 years
- Technical Leadership - 8 years
- Code Architecture - 8 years
- Architecture - 8 years
- TypeScript - 6 years
- Next.js - 5 years
Preferred Environment
Android, Next.js, Technical Leadership
The most amazing...
...project I've worked on was Reddit's Android app with 100+ million downloads.
Work Experience
Full-stack Engineer
2026 - 2026
Adiana Ayes
- Built and owned the Python service layer the AI agent runs behind—FastAPI app, bearer auth with constant-time compare, request/response contract, runtime config, and schema mapping.
- Implemented around 20 screens from client-provided Figma, running node-anchored audits that surfaced 19 documented gaps and 17 numbered product questions.
- Defined the architecture on day one as enforceable canon: repositories through server actions, server-only imports turning client leaks into build failures, and hard boundaries around the AI service—enforced by a guard test rather than convention.
Technologies: Full-stack Development, Platforms, Third-party APIs, API Integration, Artificial Intelligence (AI), React
Tech Lead
2025 - 2026
GiBud
- Led the technical direction of a legacy-to-modern marketplace rebuild spanning web, mobile, and admin/backoffice surfaces, turning an older platform into a more scalable and maintainable product.
- Guided a team of five junior developers and a designer, translating incomplete client requirements and legacy business behavior into clear workflows, implementation plans, and delivery priorities.
- Defined architecture and implementation standards across the codebase, establishing consistent patterns for front end, back end, authentication, data access, and operational workflows.
- Drove the delivery of core marketplace capabilities, including listings, auctions, fixed-price and timed flows, checkout, invoicing, messaging, notifications, reviews, and admin tooling.
- Built the foundation for a new mobile app from scratch as part of the broader platform modernization, while intentionally scoping first-wave functionality to support launch readiness.
- Preserved business continuity during the rebuild by mapping legacy workflows, user/account behavior, and operational requirements into a clearer and more structured product model.
- Designed and used an internal agent-based workflow system to automate and modernize engineering procedures while maintaining review quality, reducing process overhead, and freeing up more time for high-value product development.
Technologies: Next.js, Technical Leadership, Architecture, Code Architecture, Code Review, JavaScript, TypeScript, Flutter, Git, Apps, Firebase, Databases, Agile Software Development, Data Architecture, HTML, AI Agents, Artificial Intelligence (AI), Large Language Models (LLMs), AI Tools, Claude Code, Node.js, React, PostgreSQL, CSS, API Integration, Full-stack Development, Claude, Full-stack, Software Architecture, Mobile Development
Platform Android Developer
2022 - 2025
Volvo Cars Corporation
- Led and guided a team of 40+ developers for the Volvo Cars Android app with two other developers, providing guidance and help on architecture setup, picking libraries, generally approaching a problem, and more.
- Maintained and supported a codebase of over 1 million lines with multiple feature teams, daily pull requests, reviewing up to 5,000 lines of code daily, and managing and planning my own tasks, breaking complex ideas into smaller technical steps.
- Designed, owned, and implemented a new interface for app analytics to be used by the whole Android team as part of our initiative to understand our app better.
Technologies: Android, Kotlin, Jetpack Compose, Architecture, Mobile Apps, Technical Leadership, Code Architecture, Apps, Git, Realm, Code Review, Firebase, Databases, Agile Software Development, Data Architecture, API Integration, Software Architecture, Mobile Development
Senior Android Developer
2021 - 2021
Volvo Cars USA
- Developed a feature for the app that allows adding older car models, having an overview, and booking maintenance for them. This increased the user count by including users who couldn't use the app before.
- Created a feature that funnels multiple different news and notifications sources into one aggregated list we called the Notification Center.
- Worked with a team of eight on receiving and handling notifications from the car to the phone, including smart features.
Technologies: Android, Java, Jetpack Compose, Architecture, Mobile Apps, Technical Leadership, Code Architecture, Kotlin, Apps, Git, Realm, Code Review, Firebase, Databases, Agile Software Development, Data Architecture, API Integration, Software Architecture, Mobile Development
Senior Android Developer
2020 - 2021
- Worked with a team of Android developers on a social app that has 50M+ downloads.
- Continued on a codebase with 1M+ lines of code. Reviewing other engineer's code and owning the module for Subreddit Moderators.
- Managed and planned my own tasks, breaking designed features into smaller steps.
- Delivered a feature that would help a moderator launch and make their subreddit more popular faster.
- Built an animated counter that would be used throughout the app to show the liveliness of a social app.
Technologies: Android, Jetpack Compose, Architecture, Mobile Apps, Technical Leadership, Code Architecture, Kotlin, Apps, Git, Realm, Code Review, Databases, Agile Software Development, Data Architecture, API Integration, Software Architecture, Mobile Development
Lead Android Developer
2018 - 2020
Nurx
- Built the MVP app that serves as a web page wrapper and includes Android features such as camera, biometrics, and data storage.
- Created a fully native Android app from the ground up for our Android clients.
- Designed and developed modern app architecture starring Kotlin coroutines for robustness and workload parallelization and Koin for dependency injection.
- Built a separate data layer using Room and the Paging library for offline data storage and effective loading and displaying of data.
- Collaborated with the design team to provide the most authentic Android experience without straying from our company's designs.
Technologies: Kotlin, Android, Jetpack Compose, Architecture, Mobile Apps, Technical Leadership, Code Architecture, Apps, Git, Realm, Code Review, Databases, Agile Software Development, Data Architecture, API Integration, Software Architecture, Mobile Development
Senior Android Developer
2017 - 2018
Clarity Money (Goldman Sachs)
- Took over continuing work on the existing Android app that was later acquired by Marcus via Goldman Sachs.
- Upgraded and updated an old, rigid codebase to a modern, flexible, and scalable architecture.
- Developed a Facebook-like feed for a better and more fun way of keeping track of personal expenses.
- Worked with Kotlin, including writing new app components in it.
- Featured by Google Play as one of the Best of 2017.
Technologies: Kotlin, Java, Android, Architecture, Mobile Apps, Technical Leadership, Code Architecture, Apps, Git, Code Review, Databases, Agile Software Development, Data Architecture, API Integration, Software Architecture, Mobile Development
Senior Android Developer
2016 - 2016
AirFox
- Contributed to continuing work on the existing Android apps.
- Integrated various different ad services such as offer walls and reward videos.
- Worked on Android ROM level.
- Redid the native Android lock screen, adding personalized ads for maximum coverage.
- Took care of proper ad caching so it uses only wifi.
Technologies: Java, Android, Architecture, Mobile Apps, Code Architecture, Kotlin, Apps, Git, Code Review, Databases, Agile Software Development, Data Architecture, API Integration, Software Architecture, Mobile Development
Lead Android Developer
2016 - 2016
FlightCar (Mercedes Benz)
- Created a whole new client app that was later acquired by Mercedes Benz.
- Designed and manufactured a solid and stable app back-end architecture from the ground up.
- Took care of proper caching so the app is available offline as well.
- Integrated different social account logins with user profiles, photos, and a personal touch.
- Made an error-proof payment system.
Technologies: Java, Android, Architecture, Mobile Apps, Technical Leadership, Code Architecture, Kotlin, Apps, Git, Code Review, Firebase, Databases, Agile Software Development, Data Architecture, API Integration, Software Architecture, Mobile Development
Android Developer
2015 - 2016
American Southern
- Contributed to continuing work on the existing Android app.
- Fixed a lot of UI bugs.
- Added screens about Yelp places.
- Rewrote the API services.
- Created a landing web page with URL scheme.
Technologies: Java, Android, Architecture, Mobile Apps, Code Architecture, Apps, Git, Code Review, Databases, Data Architecture, API Integration, Software Architecture, Mobile Development
Android Developer
2015 - 2016
Prize Wheel
- Created a spin-the-wheel Android game.
- Added randomness and a natural feel to the spinning mechanism.
- Integrated eight different ad services for maximum ad coverage.
- Integrated Twitter API.
- Created a RESTful service to interact with the back end.
Technologies: Java, Android, Architecture, Mobile Apps, Code Architecture, Apps, Git, Code Review, Databases, Data Architecture, API Integration, Software Architecture, Mobile Development
Android Developer
2015 - 2015
QSS
- Worked on a smart home mobile app for the biggest TSP and ISP in Bosnia and Herzegovina.
- Utilized IoT technology and devices as well as Z-Wave technology and devices.
- Integrated with Raspberry Pi.
- Contributed to the development of a business CMS for the national bank.
Technologies: Java, Android, Mobile Apps, Apps, Git, Databases, API Integration, Mobile Development
Android Developer
2015 - 2015
DevLogic
- Built and maintained an Android app for the world’s first smart locator and phone for kids.
- Developed apps for Android Glasses used by NASA astronauts in space.
- Contributed to Android platform development.
- Worked on the Android open source project and custom build systems.
- Provided daily contact, reports, and collaborative effort to clients.
Technologies: Java, Android, Mobile Apps, Apps, Git, Databases, API Integration, Mobile Development
Android Developer
2010 - 2014
Freelance
- Built form apps in Eclipse with the Android plugin as well as some of my own games. My first project was with Android Gingerbread, API 9.
Technologies: Android, Mobile Apps, Apps, Git, Databases, API Integration, Mobile Development
Experience
Agent-assisted Engineering Workflow Tool
An internal tool built to help a small engineering team manage tasks, automate recurring workflows, improve review quality, and reduce process overhead through structured, agent-assisted execution. It was designed to modernize how internal work is organized, planned, reviewed, and carried out, while maintaining high-quality standards and freeing up more time for focused product development.
Education
2010 - 2014
Bachelor's Degree in Mathematics
Methodist University - Fayetteville, NC
2010 - 2014
Bachelor's Degree in Computer Science
Methodist University - Fayetteville, NC
2008 - 2010
International Baccalaureate Diploma in high school
United World College in Mostar - Mostar, Bosnia and Herzegovina
Skills
Libraries/APIs
React, Node.js
Tools
Git, Claude Code, Claude
Languages
Kotlin, JavaScript, HTML, TypeScript, Java, CSS
Frameworks
Next.js, Flutter
Paradigms
Mobile Development, Agile Software Development
Platforms
Android, Firebase
Storage
Databases, Realm, PostgreSQL
Other
Apps, Data Architecture, Code Architecture, Code Review, Jetpack Compose, Architecture, Mobile Apps, Technical Leadership, API Integration, Full-stack Development, Software Architecture, AI Agents, AI Tools, Full-stack, Artificial Intelligence (AI), Large Language Models (LLMs), Platforms, Third-party APIs
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