# Khosbayar Buyandalai

> Software Engineer at DoorDash

Location: San Francisco, California, United States
Profile: https://flows.cv/khosbayar

Senior Android software engineer specializing in mobile platform architecture, distributed client coordination, and observability-driven performance optimization. Experienced in designing scalable systems, improving reliability in multi-device environments, and enabling engineering velocity through reusable infrastructure.

## Work Experience
### Software Engineer @ DoorDash
Jan 2021 – Present | San Francisco, CA
Led Android platform architecture and 0→1 product initiatives across drive and merchant domains, improving distributed coordination, reliability, and performance observability at scale.

 • Acted as Mobile Technical Lead during leadership gaps, driving architectural direction, mentoring engineers, and presenting technical initiatives to senior leadership.
 • Architected and implemented a centralized client orchestration layer to eliminate duplicated leader/follower logic and prevent distributed state inconsistencies in multi-device environments.
 • Built a performance tracing framework instrumenting critical (P0) workflows, enabling P95 latency analysis and data-driven optimization across the Android app.
 • Introduced architectural improvements (navigation migration, modularization, shared infrastructure) balancing rapid feature delivery with long-term maintainability and scalability.

### Software Engineer @ Leia Inc.
Jan 2019 – Jan 2021 | San Francisco Bay Area
Designed and developed features for a social platform supporting LightField display technology.
 • Built GraphQL-driven features using Apollo client and custom SDK integrations that are integrated with hardware.
 • Implemented performance-sensitive rendering optimizations for hardware-specific display features.
 • Built reactive commenting feature with mentioning, designed and developed blocking feature and profile screen.
 • Architecture refactor from MVP to MVVM using Kotlin, Coroutines, Jetpack navigation,

### Android Developer @ The Home Depot
Jan 2018 – Jan 2019 | Austin, Texas
Home Depot (Android application) - Find and Buy team: Developing new features and fixing defects on find and buy module.

Achievements:
• Implemented Android Jetpack architecture components to the main module,
• AndroidX and MVP refactoring on the whole application structure,
• Implemented Android Slices, custom widget to Special Buy of the day product,
• Focused on unit and UI tests,
• Replaced Event Bus with Kotlin Coroutines in background jobs,
• Improved GPU performance on product info page and product details page using GPU overdraw.

### Information Technology Auditor @ Trade and Development Bank of Mongolia - TDBM
Jan 2016 – Jan 2017 | Ulaanbaatar, Mongolia
Leading Mongolian financial service provider
Tasks Performed:
•	Wrote source and test code. Used Nessus to conduct vulnerability scans and Metasploit Express for exploiting vulnerabilities. Conducted web app analysis using BurpSuite.
• Developed internal audit software web application, designed dynamic reporting features using PHP, jQuery, SQL.
• Implemented housing loan condition verifier and reporting web application using PHP, JavaScript, and HTML5/CSS3.
• Conducted several penetration tests and analysis among the mobile applications of TDB and internal web applications
using Metasploit Express and Burpsuite according to OWASP Top 10 Mobile and Web application security risks.

### System Administrator @ Trade and Development Bank of Mongolia - TDBM
Jan 2014 – Jan 2016 | Ulaanbaatar, Mongolia
Leading Mongolian financial services provider.
Tasks Performed:
•	Wrote source and test code.

Achievements:
• Developed interactive transaction correction request software using PHP and jQuery, AJAX.
• Implemented housing loan condition verifier and reporting web application using PHP, JavaScript, and HTML5/CSS3.

### Software Developer Intern @ Chinggis Systems LLC
Jan 2013 – Jan 2013 | Ulaanbaatar, Mongolia
Assisted in developing enterprise software for corporate clients.

Tasks Performed:
•	Conducted software development using Java and MySQL.

Achievements:
•	Developed background application for managing and recording employees computer usage with admin panel for employee registration, configurations, and weekly/monthly auto reporting.


## Education
### Master's degree in Computer Science
Maharishi International University

### Bachelor's degree in Information Technology
Mongolian University of Science and Technology


## Contact & Social
- LinkedIn: https://linkedin.com/in/khosbayar-hs

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Source: https://flows.cv/khosbayar
JSON Resume: https://flows.cv/khosbayar/resume.json
Last updated: 2026-03-30