Nomin Nergui

Software Engineer | Full-Stack Developer

Software Engineer with 5 years of experience delivering production-ready, scalable full-stack solutions across web and mobile platforms. Strong background in React, React Native, Next.js, TypeScript, Java, Node.js, and cloud-native development on AWS.

Proven ability to design and implement secure, high-performance systems with a focus on reliability, scalability, accessibility (ADA), and performance optimization. Experienced in Agile environments, CI/CD pipelines, code reviews, and mentoring junior engineers.

Passionate about owning end-to-end features, collaborating across teams, and delivering high-quality solutions that drive measurable business impact and customer value.

Where to find me

Skills Which I use/know

These are the technologies I've learned and worked with. This list is constantly evolving as I continue to learn and grow as a developer.

< Languages />

JavaScriptJavaScript
TypeScriptTypeScript
JavaJava
PythonPython
JavaScriptJavaScript
TypeScriptTypeScript
JavaJava
PythonPython

< Frontend />

React.jsReact.js
React NativeReact Native
Next.jsNext.js
AngularAngular
Redux / RTKRedux / RTK
Tailwind CSSTailwind CSS
SASSSASS
Material-UIMaterial-UI
Ant DesignAnt Design
HTMLHTML
CSSCSS
React RouterReact Router
React Hook FormReact Hook Form
React QueryReact Query
Styled ComponentsStyled Components
Vite.jsVite.js
Chart.js
React.jsReact.js
React NativeReact Native
Next.jsNext.js
AngularAngular
Redux / RTKRedux / RTK
Tailwind CSSTailwind CSS
SASSSASS
Material-UIMaterial-UI
Ant DesignAnt Design
HTMLHTML
CSSCSS
React RouterReact Router
React Hook FormReact Hook Form
React QueryReact Query
Styled ComponentsStyled Components
Vite.jsVite.js
Chart.js

< Backend & Databases />

Spring BootSpring Boot
Spring MVCSpring MVC
Spring Data JPASpring Data JPA
Spring SecuritySpring Security
HibernateHibernate
RabbitMQRabbitMQ
KafkaKafka
DjangoDjango
Node.jsNode.js
Express.jsExpress.js
PostgreSQLPostgreSQL
MySQLMySQL
MongoDBMongoDB
RedisRedis
ElasticSearchElasticSearch
JWT AuthJWT Auth
REST APIsREST APIs
GraphQLGraphQL
Spring BootSpring Boot
Spring MVCSpring MVC
Spring Data JPASpring Data JPA
Spring SecuritySpring Security
HibernateHibernate
RabbitMQRabbitMQ
KafkaKafka
DjangoDjango
Node.jsNode.js
Express.jsExpress.js
PostgreSQLPostgreSQL
MySQLMySQL
MongoDBMongoDB
RedisRedis
ElasticSearchElasticSearch
JWT AuthJWT Auth
REST APIsREST APIs
GraphQLGraphQL

< DevOps & Cloud />

DockerDocker
GitGit
GitLabGitLab
CI/CDCI/CD
AWSAWS (DevOps)
VercelVercel
KubernetesKubernetes
NginxNginx
JenkinsJenkins
FigmaFigma
DockerDocker
GitGit
GitLabGitLab
CI/CDCI/CD
AWSAWS (DevOps)
VercelVercel
KubernetesKubernetes
NginxNginx
JenkinsJenkins
FigmaFigma

< Testing />

JestJest
React Testing LibraryReact Testing Library
JUnitJUnit
JestJest
React Testing LibraryReact Testing Library
JUnitJUnit

< AI & Emerging Tech />

Machine LearningMachine Learning
Amazon RekognitionAWS AI Services
OpenAI APIOpenAI API
Machine LearningMachine Learning
Amazon RekognitionAWS AI Services
OpenAI APIOpenAI API

Experience

HIPAY LLC

Software Engineer

Employment Type
Full-time
Employment Period
Nov 2022 – Jul 2024
  • -Designed and developed scalable, mobile-first web and mobile applications using React, React Native, and TypeScript, with a strong focus on user experience, performance, and accessibility.
  • -Built a train ticket booking web application using React, Redux, React Query, Tailwind CSS, and Jest, optimizing complex form workflows with React Hook Form, user data persistence, and validation—reducing booking time by ~20% while handling edge cases and error states.Watch demo
  • -Integrated secure REST APIs with third-party services to generate PDF tickets, send confirmation emails, and trigger reminder notifications, ensuring production-ready, well-documented code with reliable error handling and test coverage.
  • -Automated data cleanup and user info retention with a Python script, cutting manual workload by 90%.
  • -Delivered a mobile-first insurance web application using React, Redux, Ant Design, and Material UI; improved performance by 25% by reducing unnecessary re-renders, optimizing state management, and debugging production issues across multiple UI flows.Watch demo
  • -Created a Node.js backend middleware that cached and processed API responses, reducing load by 30% and minimizing manual intervention.
  • -Implemented a full-stack eSIM web app (Airalo, serving 20M+ users worldwide) using Next.js with SSR, React.js, and Material UI and a Java backend, delivering responsive, mobile-first pages. Optimized server-side rendering to decrease page load times by 35%, improving user experience and engagement.Watch demo
  • -Engineered a Java Spring Boot microservice for HiCharge power bank rentals, consuming Kafka messages to process rent requests, deduct user balances, and trigger session timers resulting in a 18% improvement in rental processing efficiency and real-time session management.
  • -Developed a Wrestling Prediction Module in React Native using React Navigation with a PHP backend, improving data loading efficiency and screen rendering. Optimized performance to reduce load times by 20% and deliver a smoother, more responsive user experience.Watch demo
  • -Implemented a card hold system with React Native and PHP, integrating REST APIs, Redux, Firebase push notifications, and Jest testing, which enhanced security, improved performance, and introduced a new core payment model.Watch demo
  • React.jsReact.jsNode.jsNode.jsJavaJavaTypeScriptTypeScriptReduxReact QueryJavaScriptJavaScriptTailwind CSSTailwind CSSReact NativeMaterial UISpring BootSpring BootMongoDBMongoDBPostgreSQLPostgreSQLGitGitGitLabRESTRESTDockerDockerJestAWSRedisRedisKubernetes

Ulaanbaatar Railway

Software Developer

Employment Type
Full-time
Employment Period
Nov 2020 – Nov 2022
  • -Designed and optimized front-end applications for enterprise systems, including management dashboards, HR portals, asset tracking platforms, improving user efficiency by 25%.
  • -Built a Management and Analysis System using React, Recharts, Node.js, MongoDB, and GraphQL, delivering interactive dashboards that improved resource allocation decisions by 30%.
  • -Developed enterprise dashboards and HR systems using React, Redux, Ant Design, and Node.js, efficiently supporting 16,000+ users while enhancing reporting speed and usability.
  • -Implemented an asset management system with Java Spring Boot and MSSQL, automating monthly and yearly PDF reporting, reducing manual reporting effort by 70%.
  • React.jsReact.jsNode.jsNode.jsJavaScriptJavaScriptGraphQLGraphQLHTMLHTMLCSSCSSAnt DesignAnt DesignReduxSpring BootSpring Boot

UNIT LLC

Software Developer

Employment Type
Full-time
Employment Period
Jun 2019 – Oct 2020
  • -Built responsive ASP.NET MVC web applications with interactive UI using C#, Razor, JavaScript/jQuery, and Bootstrap for improved user experience and seamless data handling.
  • ASP.NETASP.NET MVCC#C#Razor ViewsHTMLHTMLCSSCSSJavaScriptJavaScriptjQueryjQueryAJAXBootstrapBootstrap

Education

Master of Science in Computer Science

In Progress

Maharishi International University

Fairfield, Iowa · Expected Apr 2027

In progress via distance education; expected completion 04/2027.

Key Courses: Algorithms, Enterprise Architecture, Cloud Computing, Web Applications - Architecture and Frameworks

Bachelor of Science in Computer Science

National University of Mongolia

Ulaanbaatar, Mongolia · 2016 – Jun 2020

Bachelor of Science in Computer Science.

Certifications

AWS Certified Cloud Practitioner

Amazon Web Services

10/2024

Verify credential

AWS Certified Solutions Architect – Associate

Amazon Web Services

04/2025

Verify credential

AWS Certified Developer – Associate

Coming soon

Amazon Web Services

—

LeetCode

Algorithm & data structure practice

View profile
680
Problems solved
450+
Day streak
350+
Medium
Easy 200+ · Hard 100+
520
Java
JavaScript 150+
ArraySortingStackMathDPHashMapTreeTwo PointersBinary Search

Projects

These are some of my projects I’m proud of.

Explore more on GitHub
Let's Work Together

I'm open to discussing new projects, creative ideas, or opportunities to be part of your vision.