James Paik

I'm an entrepreneur with a technical background.

  • Currently I'm a Senior Software Engineer at Klaviyo.
  • On the side, I run a web development business, Zinnia Development.
  • I also enjoy developing games as a hobby and run Cosinic.

I focus on building beautiful and scalable applications that both the development team and the end users are satisfied with. I tend to explore new technologies and build projects with them to expand my boundaries in this seemingly endless field.



2016 - 2022

Lead Full Stack Developer

Jan 2020 - Sep 2022

  • Collaborated and led a team of engineers at Actovia while coordinating with the company’s leaders to implement and execute new ideas.
  • Developed full stack applications using Vue.js/Nuxt.js with Typescript for frontend and .NET Core with C# and Node.js with Typescript for backend. Used SQL Server and PostgreSQL for databases.
  • Worked closely with the marketing team to create a demo version of the web application with dynamic SEO and dynamic sitemaps for property searches with automated sign up subscriptions to create a new acquisition workflow.
  • Implemented CI/CD practices using Gitlab CI/CD and Github Actions to deploy dockerized applications to GCP and DO.

Lead Front End Developer

Aug 2016 - Dec 2019

  • Led the UI/UX redesign and development of Actovia's applications. Designed and developed the applications using HTML5, SCSS, Javascript, jQuery and Vue.js with the .NET Framework, ultimately increasing acquisition and retention rates by 150%
  • Implemented E2E testing with Cypress and integrated with Jira which led to a significant decrease of bug fix requests from users.
  • Developed and maintained an internal custom CRM to work specifically with the Actovia Application.
  • Streamlined workflow with Task Runners (Gulp & Webpack), SCSS, Babel and new ES JS standards with documentation for the team.

Zinnia Development

Jul 2014 - Present

Founder & Lead Developer

  • Incorporated Zinnia Development LLC for my hobby on creating websites for small businesses officially in 2019.
  • Designed and developed over 30 small business websites and web applications since inception, working directly with small business owners.
  • Lowered hosting costs and downtime for small businesses by over 90% from their previous setup by utilizing serverless and cloud computing solutions and ensured reliability for these websites.

Trade Trendy

Sep 2015 - Dec 2016

Co-Founder & Technical Lead

  • Lead the development of Trade Trendy to revolutionize the online clothing market. Trade Trendy was an online marketplace to trade used clothing, shoes, and accessories.
  • Developed the web application using Ruby on Rails for the backend with jQuery and Bootstrap for the frontend.
  • Produced a scalable architecture as the user base grew from tens to thousands of concurrent users using AWS EC2 auto scaling groups and ELB.
  • Conducted weekly sprint goals to meet our feature log with consultant developers.



Dec 2018 - Present


  • ONUW is an online multiplayer game based on a board game.
  • Used Node.js running Express.js for views and routing with Socket.io for real time interaction.
  • Running on a DO Ubuntu droplet with Nginx as reverse proxy and PM2 for management.
  • As of 2022, there are around 200 players around the world playing daily.

GPA For Me

Apr 2016, 2020


  • Created using Vue.js + Nuxt.js with Auth0 authentication and serverless deployment with a serverless MongoDB database to store user information.
  • Old Version: To explore AngularJS, I created a GPA Calculator using Angular2.
  • It calculates GPA in real time with both semester and cumulative GPA scores. Users can choose from the three different GPA scales as well.
  • Every season during the end of the semester, there are over 5,000 students that use this to calculate their GPA and hope for the best.

Course Sniper

Dec 2015

Front End Developer

  • Designed and developed the front end of the web application that is used by over 7,000 Rutgers students every semester, assisting them with class registration.
  • Rewrote the frontend to be responsive and user friendly

RU Direct

Apr 2015

Front End Developer

  • Developed an android app for the bus system at Rutgers University during HackRU 2015.
  • Continued to maintain the project resulting in over 10,000 Rutgers students using it daily.
  • As of 2019, Rutgers changed their services to TransLoc, resulting in the shutdown of this app.

Favorite Tech

  • HTML5
  • SCSS
  • JavaScript
  • Typescript
  • Vue.js
  • Node.js
  • Nuxt.js
  • C#/.NET Core
  • PHP/Laravel
  • Python/Flask
  • Cypress
  • GitOps
  • Jira
  • Linux/Ubuntu
  • Nginx/Apache

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