Senior Software Developer in Kotlin, Dart, JavaScript

Gantogtokh Oyundalai **********@*****.***

https://www.linkedin.com/in/ganaa-oyundalai/ Austin, Tx, 78727

https://leetcode.com/u/keeplearning99/ 641-***-****

https://github.com/oganaa2472

SUMMARY

Senior Software Developer with 5+ years of experience. Expert in Kotlin, Dart and JavaScript with a focus on scalable mobile/web architectures. Ranked in the Top 2% globally on Leetcode Proven track record of optimizing backend performance by 25% and integrating AI-driven features.

SKILLS

Kotlin, Dart, JavaScript, TypeScript, C++, Java

Flutter, React, Next, Tailwind, Nuxt, Vue

AWS (EC2, RDS, SQS, Lambda, S3, CDN, Cognito)

PostgeSQL, MongoDb, Firebase, SQLite, REDIS

Singleton,Dependency Injection, Observer, Serveless, Monolith, Pub/Sub, Microservice

Node.js, Express, Docker, CI/CD (GitHub Actions),

Jetpack Compose,View Model, Coroutines, Flow,

Room, Navigation, Hilt, Clean Architicure, MVVM WorkManager,Testing, Retrofit, Code Review

REST APIs, Websocket, GraphQL, Generative AI

Jira, GitHub, GitLab, Bloc, Provider, GetIt

Load Balancing, Rate Limiting, Kubernetes

PROFESSIONAL EXPERIENCE

Senior Software Developer Smart Sudalgaa LLC 04/2022 – 01/2026

Delivered high-performance Android solutions (NSudalgaa, Sem) using MVVM, Kotlin Coroutines for asynchronous processing, resulting in a 20% improvement in app responsiveness.

Designed a full-stack operations management platform using React, Node.js, Express, Docker and Kubernetes to handle car wash, parking, delivery, and maintenance services, boosting employee satisfaction by 10%.

Published apps to Google Play, handling the full release cycle including CI/CD pipelines (GitHub Actions).

Collaborated with UI/UX designers and backend engineers in Agile/Scrum workflows, leveraging Git, and CI/CD pipelines to consistently deliver features 10% faster than sprint targets.

Enforced strict separation of concerns in the MLplus app by architecting state using flutter and Bloc/Cubit, which decoupled business logic and improved unit test coverage by 20%.

Mentored 2 junior developers on modern Android best practices (MVVM, Dependency Injection), improving team velocity by 25%.

Designed and deployed a robust offline-first architecture using Room and WorkManager, improving user experience in low-connectivity areas and increasing daily active users by 35%.

Integrated Firebase Analytics decreasing crash rates by 10%

Implemented push notification and personalized recommendations, increasing user engagement by 12%.

Software Developer StarSoft LLC 01/2020 – 04/2022

Developed an online video conferencing and chat platform using MediaSoup, WebRTC,React, Node.js, and Socket.IO, reducing server load by 10%.

Created RESTful APIs for a Learning Management System (LMS) utilizing React, Node.js, Express,Docker and MongoDB, enhancing app performance for mobile developers by 20%

Improved the back-end performance of a web application by 5% using Postgres and implementing stored functions.

Applied Clean Architecture principles and implemented dependency injection in Kotlin and Dart, improving code scalability, maintainability, and testability by 30%.

Key Projects

Nsudalgaa Ecosystem : Architected a data collection system featuring an offline-first Android mobile app and a React.js/Next admin dashboard.

The Tour: Built an Android frontend using Kotlin and a scalable backend API using Node.js, Express, and MongoDB, providing secure user authentication and booking management

E-commerce Platform: Designed and deployed a scalable, serverless e-commerce platform on AWS using Lambda, API, React, Gateway, and Cognito for secure backend operations. Automated CI/CD pipelines with AWS CodePipeline & CodeBuild and hosted the frontend on S3 with CloudFront.

EDUCATION

MS Computer Science Maharishi International University Fairfield, IA, US

BS Software Engineer Mongolian University of Science and Technology

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