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Brandon Kim
Verified Expert in Engineering
Back-end Developer
Seoul, South Korea
Toptal member since October 28, 2021
Bio
Brandon is a results-driven and highly motivated software developer with operations, full-stack development, and project management expertise. He has a proven track record of driving successful initiatives, emphasizing high-quality process improvements and end user experience.
Portfolio
Thumb Technologies
Python, Django, Docker, TypeScript, Back-end, Playwright, React
The Villa LIfe
React, Node.js, TypeScript, NestJS, Prisma, PostgreSQL, Stripe, HubSpot...
bitHolla
Node.js, PostgreSQL, Redis, WebSockets, Plugins, Webhooks, Swagger, Express.js...
Experience
- TypeScript - 5 years
- React - 5 years
- Node.js - 5 years
- Redis - 5 years
- PostgreSQL - 5 years
- Full-stack - 4 years
- Stripe - 3 years
- NestJS - 2 years
Work Experience
Back-end Developer
2023 - PRESENT
Thumb Technologies
- Implemented integration of the platform with Microsoft Active Directory, enabling automatic user provisioning through the SCIM protocol.
- Developed a live-recording feature that streamed audio chunks from client to server and downstream tasks via S3, decreasing processing time by 60%.
- Optimized core application to increase resource utilization by 20% and improve error handling, resulting in smoother operation and fewer downtimes.
- Refactored the notetaker bot, improving efficiency, performance, and error handling. This led to a 30% increase in reliability and a 20% decrease in resource usage.
Technologies: Python, Django, Docker, TypeScript, Back-end, Playwright, React
Full-stack Developer
2021 - 2023
The Villa LIfe
- Oversaw an international team of developers across three countries to develop the initial MVP to raise over $1 million in investment funding while ensuring 100% of team KPIs were met.
- Implemented NestJS and TypeScript as replacements for Node.js and Express to improve code efficiency by 30%, reduce the error rate by 30%, and implement a new architecture that improved efficiency and maintenance.
- Created an affiliation program allowing strategic partnerships with travel agents and influencers, contracting with approximately 30 external stakeholders to enable access to the platform, increasing revenue by 20%.
- Developed database resource optimizations by implementing Redis cache for frequently accessed databases and implementing a new pricing structure, reducing database resource usage by 80%.
- Led projects improving efficiencies, including implementing Slack and Monday.com to improve communication and task management and developing our calendar management system saving $6,000 annually in service fees.
- Managed a move from Sequelize ORM to Prisma ORM to utilize the latter's improved TypeScript support; this project improved coding efficiency by 20% and was completed on time and under budget.
- Acted as a consultant with the CTO to implement a new pricing structure using the same database structure to support the old and new structures, saving 240 hours to be dedicated to other projects.
- Built ICS syncing functionality to allow hosts to integrate their calendars into the system. This decreased denied bookings by 40%, improving client and stakeholder satisfaction with the platform.
Technologies: React, Node.js, TypeScript, NestJS, Prisma, PostgreSQL, Stripe, HubSpot, Mailchimp, Postmark, Express.js, Docker, Material UI, HTML
Software Developer
2019 - 2021
bitHolla
- Led the development of a trading algorithm to provide liquidity to the exchange, increasing customer volume by more than double, increasing transaction fee revenue by 100%, and reducing liquidity maintenance hours by 90%.
- Created the architecture for open-source plugin development, increasing developer engagement on Discord and GitHub by 60%. The new architecture allowed the development of three plugins within the first two months.
- Automated systems, including withdrawal/deposits and user tier upgrading, tasks that previously had to be manually handled by admins, reducing transaction error rates by 30%, and increasing work hour efficiency by 70%.
- Implemented improved exchange configuration architecture, allowing operators to update crucial values such as trade fees and trade limits on the fly, increasing the uptime of servers by 30%.
- Integrated a third-party KYC service to improve user authentication services significantly; this automation of the authentication flow decreased the error rate by 30% and improved efficiency by 90%.
Technologies: Node.js, PostgreSQL, Redis, WebSockets, Plugins, Webhooks, Swagger, Express.js, Mocha, Chai, Moment.js, Lodash, MongoDB, NPM, HTML
Project History
The Villa Life
A full-stack web application for an early-stage property management startup. I was brought on as the lead developer and built the entire front and back end. My other tasks included handling the database architecture and design, payment processing, and property calendar management.
CollabList
https://collablist.onrender.comCollabList is a real-time collaborative web application where multiple users can create, read, update, and delete items on a list. The list will be updated for every member of a list the moment one of them performs CRUD actions. The app is an excellent way for teams to efficiently and effectively collaborate on shopping lists, to-do lists, or any other forms of lists.
Agora
https://agora-9tod.onrender.comThis project is a RESTful Reddit clone where users can post, favorite, and vote on topics and comments. It was built using various technologies, including React, Vite, NestJS, Node.js, TypeScript, and Prisma.
Portfolio
https://swkoyo.comMy online portfolio was built using various technologies, including Next.js, React, Material UI, Zod, TypeScript, and Node.js. The website includes information on all my projects and work experiences, as well as links to my resume and LinkedIn and GitHub profiles.
HollaEx Crypto Exchange Node.js Library
https://github.com/brandonkimmmm/hollaex-clientA Node.js library that allows users to easily interact with the HollaEx cryptocurrency exchange's API. Converted from the original library's Vanilla JS to TypeScript. Also allows users to connect to the exchange's WebSocket server.
Chatty
https://chatty-z8hu.onrender.comChatty is a SPA chat room that uses a React router. It was built using React, TypeScript, and Firebase. Users can access chatrooms as guests, signed-in users, or log in using Google's authentication service.
Education
2024 - 2024
Bachelor's Degree in Computer Science
Oregon State University - Corvallis, Oregon
2013 - 2017
Bachelor's Degree in Business Administration
University of California, Riverside - Riverside, CA, USA
Certifications
JANUARY 2018 - PRESENT
Software Development
Bloc.io
Skills
Libraries/APIs
Node.js, React, Chai, Moment.js, Lodash, Passport.js, REST APIs, React Redux, Stripe, Slack API, Socket.IO, Playwright
Tools
Sequelize, Mocha, NPM, Docker Compose, Prisma, Mailchimp
Languages
TypeScript, JavaScript, HTML, Python, SQL, HTML5, GraphQL, CSS, Go
Frameworks
Express.js, Swagger, Jasmine, JSON Web Tokens (JWT), Redux, NestJS, Next.js, Material UI, Django
Paradigms
Agile Software Development, Test-driven Development (TDD), CRUD, Agile, REST, Parallel Programming
Storage
PostgreSQL, Redis, MongoDB, SQLite, Google Cloud, MySQL
Platforms
Unix, Docker, Firebase, Amazon EC2, HubSpot, Amazon Web Services (AWS)
Other
APIs, WebSockets, Web Development, Plugins, Webhooks, Bcrypt, Back-end, Full-stack, API Integration, SaaS, Telegram Bots, Computer Science, Discord Bots, MikroORM, Front-end, Economics, Web MVC, Amazon RDS, Postmark, Chakra UI
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