Kingston, JamaicaAvailable for new roles

Hi, I'm
Christopher Shim.

Full-stack software engineer building fintech and payments products with React, Node.js, and .NET.

6+ years · fintech · payments · banking

01About

I care about features that hold up in production — and code other people can maintain.

I'm a full-stack software engineer with 6+ years building production web and backend systems across fintech, payments, and banking. I work in React, TypeScript, Node.js, and .NET Core, backed by PostgreSQL/SQL, Docker, and CI/CD.

I hold a B.Sc. in IT from the University of the Commonwealth Caribbean (2021) and am completing a Master of Computer Science (Big Data Systems) at Arizona State University, expected December 2026.

Outside work I run a small web studio and build side projects — including 3D game development in Unity and Blender — to keep learning.

Location: Kingston, Jamaica
Focus: Fintech · Payments · Banking
B.Sc. IT: UCC, 2021
M.Sc. CS: ASU — Dec 2026

02Skills

The tools I reach for.

Languages & Frameworks

TypeScript
JavaScript
C#
React
Angular
Node.js
.NET Core

Data

PostgreSQL
SQL Server
MongoDB
Sequelize

Cloud & DevOps

AWS
Azure
Docker
Kubernetes
CI/CD

Web & Tooling

HTML
CSS
Tailwind
Git

03Selected Work

A few things I've built and shipped.

fragrancehaven.vercel.app/

01E-commerce · Payments2024

Fragrance Haven

A full-stack e-commerce platform with secure checkout and a complete admin back office.

Built product and cart workflows, a secure checkout flow, and an admin dashboard for catalog, transactions, and analytics — backed by a Dockerized .NET Core API on Fly.io and a React front end on Vercel.

React
Tailwind
.NET Core 7
ASP.NET Core
PostgreSQL
Docker

Live Source

sundaycruise.fly.dev/

02Real-time platform2023

SundayCruise

A real-time dating platform with live messaging and presence.

Implemented live messaging over SignalR, JWT authentication, profile management, and activity/presence tracking — deployed as Dockerized containers on Fly.io with automated GitHub Actions releases.

Angular
.NET Core
SignalR
JWT
PostgreSQL
Docker

Live Source

apps.microsoft.com/detail/9nz1mgqw278b?hl=en-US&gl=JM

Desktop appKanban Lite

03Desktop app2024

Kanban Lite

A cross-platform desktop app for visual project management.

Kanban boards with workflow stages and progress visualization, packaged as a native desktop application and published to the Microsoft Store.

Next.js
Electron
TypeScript

Microsoft Store

www.calvarybaptistmontegobay.org/

Client websiteCalvary Baptist Church

04Client website2023

Calvary Baptist Church

A full website redesign for a live client, with events, donations, and an admin dashboard.

Designed and shipped Events, Donations, and Admin Dashboard modules for a live congregation — focused on simple content management and a clean, accessible public site.

Next.js
Tailwind
React

Live

04Experience

Six years across fintech, payments, and banking.

Nov 2024 — PresentPresent

Software Engineer

Dime PayKingston, Jamaica

Built merchant admin dashboard features in React/TypeScript, including beneficial-owner compliance review flows with conditional ownership-share rendering, keeping the frontend aligned with evolving backend API contracts.
Implemented webhook signature-verification middleware (QStash/Upstash) validating against the captured raw request body rather than a re-serialized payload, eliminating a recurring class of byte-level signature failures in production.
Developed business-onboarding ID-verification validation logic across multiple entity types (sole trader, non-profit, and others), and resolved owner-data discrepancies between list and detail APIs.
Shipped and maintained invoicing and membership features on a Node.js/Express + Sequelize/PostgreSQL payments platform, supporting DB migrations and debugging production billing flows.

Nov 2023 — Oct 2024

Software Developer, Level II

MC SystemsKingston, Jamaica

Maintained and extended a core banking application for JN Bank (Gupta, C#, VB.NET, ASP.NET), reducing development time ~30% and improving efficiency ~25%.
Optimized relational databases on SQL Server, improving query performance ~25%.
Migrated a core banking module to Angular, improving application performance ~40%.

Aug 2022 — Oct 2023

Software Developer

Smart Mobile SolutionsKingston, Jamaica

Developed a receipt-digitalisation app (React.js, Node.js) that cut banking-process completion time ~30%.
Cut deployment times ~40% using Docker, Kubernetes, and Helm, and raised server-side reliability ~70% through unit testing.
Standardized API documentation in Postman, reducing new-developer onboarding time ~30%.

Apr 2020 — Jul 2022

React Frontend Developer

KPMG JESSKingston, Jamaica

Built and maintained features for a React talent-management platform used across KPMG member firms, turning designs into responsive, reusable components.
Led a frontend performance-optimization initiative that improved efficiency ~25%.
Integrated the frontend with backend APIs alongside distributed cross-border teams, meeting enterprise security-compliance requirements and synchronized release schedules.

Feb 2019 — Apr 2020

Quality Assurance Analyst